Saturday, January 23, 2016

Quadruple Growth Predicted in Biomethane and BtG In the UK and Europewide

The idea that the number of biomethane plants could quadruple by 2021 sounds remarkably optimistic, but it is a figure supported by the top industry experts. 

It is a prediction which will be very welcome news for all those that have for so long worked in the industry and striven to convey to anyone who would listen, the many advantages of the anaerobic digestion process.

Biomethane is the term used for the raw (anaerobic digestion plant) biogas which is purified into "biomethane" before being sold, and the use of that "green gas" for injection into the gas supply grid is one of the very most efficient uses of that energy. 

Until recently, the most common use of biogas was to use it after only a minimum purification (to avoid corrosion of the generator equipment) to create electricity. However, producing electrical power invokes a large loss of that energy in the electrical distribution system, and a much higher loss than in the natural gas grid (although energy is of course expended in the purification (upgrading) process). 

It is also wonderful news for the environment, and will significantly reduce greenhouse gas emissions if this number of plants is built. Additionally, other biogas plants will continue to be built for electricity production, and will continue to expand the overall renewable energy output in electricity.

This is, not forgetting that, biomethane is also very useful as a transport vehicle fuel (Bio-CNG), as explained in our final article excerpt.

So, now! If you want to check the validity of what I am saying here, read on!

ADBA (UK) concludes that the number of biomethane plants could quadruple by 2021

Dec 16, 2015: According to the latest data, Europe counts with 17,240 biogas and 367 biomethane plants. For the past six months, the EBA team has joined efforts to compile its Biomethane and Biogas Report 2015, the annual statistical report on the European anaerobic digestion industry and markets. via

EBA Biogas Report will be shortly available!

According to the latest data, Europe counts with 17,240 biogas and 367 biomethane plants. For the past six months, the EBA team has joined efforts to compile its Biomethane and Biogas Report 2015, the annual statistical report on the European anaerobic digestion industry and markets.
via Green Gas Industry Could “Quadruple” With New RHI Budget

...The Anaerobic Digestion and Bioresources Association (ADBA) forecasts that the Chancellor George Osborne’s spending review could support the construction of an additional 140 biomethane plants. The announced £1.15 billion allocation for the Renewable Heat Incentive (RHI) budget by 2021 could quadruple the number of UK biomethane plants. These plants represent a fourfold increase on current numbers […]
The post UK: ADBA concludes that the number of biomethane plants could quadruple by 2021 appeared first on European Biogas Association.

via UK: ADBA report concludes that the number of biomethane plants could quadruple by 2021

The UK has seen a further 23 biomethane to grid (“BtG”) connections in 2015. This makes a total of 50 BtG sites and means that, for the second year running, the UK has been the fastest growing biomethane market in the world.

Judging from the above, we do seem to have been correct when last year we reported in this blog How the Big Picture for Anaerobic Digestion and Biogas Gets Yet Bigger!

UK sees highest level of Biomethane to Grid (BtG) growth in the world

BtG is the process whereby renewable gas is injected into the UK’s gas grid, giving the UK a highly flexible and efficient source of green, sustainable energy made from organic material include food waste.
John Baldwin, CNG Services founder and managing director said:
“The growth experienced in 2014 has continued with a total of 47 new projects in the last two years, the highest level of growth of any gas market in the world”
“Biomethane is a highly flexible renewable fuel as it utilises the extensive and valuable UK gas grid to provide energy both for gas central heating and also to fuel supermarket distribution trucks” ...
Baldwin continues:
“Growth of BtG has been spectacular. ... Growth accelerated markedly in 2014 with CNG Services connecting over 20 plants across the UK working with customers including Wyke Farms, Severn Trent, Wessex Water, Refood and Future Biogas.
Baldwin comments:
“When you look at how fast this industry sector is developing, it’s clear that BtG is going to be the biggest renewable heat technology in the UK. I’m proud of the part we’ve had to play in this success story”.
Biomethane has had the support of the [UK government subsidy known as the] Renewable Heat Incentive (RHI) worth £860 million. ...
Biomethane is also increasingly being used as a fuel for transport, known as Bio-CNG, where is offers big environmental benefits.
For the full article, visit :

We would be delighted to see your comments below. Do you agree that this predicted rate of growth in AD plants for biomethane production is realistic, for example? Are you worried that energy crops will raise the cost of food, by doing this? Is this the right way forward for renewable energy production, or are there better ways of using organic waste materials? Please give us your opinions here.

Tuesday, January 12, 2016

UK AD Plant Installation Contractors Rush To Complete Biogas Installations Ahead Of FiT Reductions

A new set of UK Feed-in-Tariff (FIT) reductions known as "degressions" will come into force from 31 March 2016. This has led to companies rushing to complete existing projects and starting new ones early, to ensure that their anaerobic digestion (AD) projects get the last of the high subsidy rates.

Rates will only drop 5% to 11% at the start of April, but there is widespread concern that the mechanism known as degression, which it is hoped will soften the run-down of this subsidy, will deter the commencement of a large number of projects due to start later this year, and result in a high level of UK AD Plant Installation Contractor bankruptcies.

The idea of degression is that as the target spending level approaches, the FiT will be reduced more rapidly. This should minimize government overspending if the uptake of the FiT is rapid, but the uncertainty it introduces into predictions of anaerobic digestion plant project profitability could simply stifle demand for new biogas plants. If that happened it would set-back the UK's biogas industry for years, and cause widespread job losses.

How The UK Got UK AD Plant Installation Contractors Into This Situation

This has been explained by CooperOstlund's Johan Ostlund in the January 2016 edition of Wet News, as follows:

"Feed-in Tariffs (FITs) were introduced by the government in 2010 to help increase the level of renewable energy generated in the UK. The subsidy outlined that renewable generation systems, up to a capacity of five megawatts (MW), were eligible for financial support for producing green energy.
Alongside helping the UK towards its legally binding EU target of 15% of total energy from renewables by 2020, the incentives aimed to drive long-term investment in renewable technology and innovation.
Since its introduction, the scheme has been hugely successful. In 2014 alone, the anaerobic digestion (AD) industry installed 89 new plants in the UK, a high percentage on site at water companies, food manufacturers or recycling businesses to turn organic waste, wastewater or sewage into renewable energy.

Energy targets

In fact, such has been the success of the financial support for AD installations that the industry now exceeds 500MW of total capacity across 411 plants nationally, making a significant contribution to the UK's renewable energy targets.
FITs have transformed the way the UK generates its power over the past three years, with more than 22% coming from renewables in the early part of 2015.
However, this has come at a price and the Department of Energy and Climate Change (DECC) admits spending on clean energy support is projected to be as much as £1.5bn over budget by 2020/2021.
In a bid to keep the budget under tighter control, the government introduced the FITs degression mechanism, which automatically reduces the level of subsidy available to new projects once a certain level of deployment is reached. Now, as part of the latest review, DECC wants to cut expenditure on the FITs scheme to between £75M and £100M, from January 2016 to 2018/19 and has significantly reduced the rates it will pay.
As part of these latest FITs degressions, financial support for AD sites will decrease significantly from the end of March 2016. In fact, the tariff for facilities under 500KW will reduce from 10.54 to 936p/Kwh, while facilities greater than 500KW will drop from 9.16 to 8.68p/Kwh." via WWT Online-WetNews


It would be foolish of any government to continue to damage the UK'S renewable energy industry/UK AD Plant Installation Contractors in the way it has the solar panel and home insulation industries over the last 6 months, since the current Conservative Government got into power in May 2015.

For a party which is says it is both keen to introduce measures which will reduce climate change, and provide employment/support businesses, while improving the UK's housing stock, it is hard to fathom why they would jeopardize the biogas industry in this way, with all its beneficial spin-off's.

Please give us your comments below (Click on "comments" to add your own.)

Tuesday, December 29, 2015

5 Awesome Advantages of Using Biogas as a Cooking Fuel

The biogas from a home biogas plant need only be compressed by placing a weight on the biogas collection and storage sack or dome over the digester tank, and possibly filtered through water, before it can be piped direct into a cooking stove,

This is truly cheap and simple to do, and the initial "fuel" or feedstock that the biogas digester is made from is simply the waste organic material produced by the family or community which runs the digester.

In rural communities in the developing nations the following list of advantages normally will apply:

1. Biogas production needs less labour than tree felling, especially when the trees are far away from the home and need to be transported.

2. Trees can be retained. Using biogas avoids the need for constantly removing trees for firewood allowing forests and woods to recover and grow, bringing shade, shelter, and forest products, plus maybe food as well.

3. Biogas is a quick, easily controlled fuel. Turn it on at a tap, light it and the heat is there to use immediately. In contrast using wood takes time to get the fire warm enough, and the fire needs attending for that period as well.

4. Biogas emits no smoke, when burnt correctly. It has no smell when pure (unless there is a leak and then you need to know of the leak, in any event). This means massively reduced eye and respiratory irritation, and extends the lives of all who use smoky wood stoves.

5. Clean pots! Yes. Pots and dishes, in fact everything remains much cleaner when using biogas as a cooking fuel instead of wood.

In reality, these are just a few of the examples where using biogas for cooking instead of wood, or even fossil fuel alternatives such as LPG in cyclinders, (which is so expensive in the developing nations), has so many advantages.

So, why aren't more people doing it? Let us read your opinions please, in the comments box below.

Sunday, December 06, 2015

Anaerobic Digestion Creates Heat but is UK Industry Overheating?

The anaerobic digestion process creates heat, and this is especially useful when it is used on the site of the digestion plant or is piped of-site to heat homes, and be used in industries near to the AD Plant. But, in another, largely political sense has it been overheating? Has there been such a large increase in the number of AD facilities in the UK that the government has decided that like the wind power and solar industries, whatever their industry experts say the industry no longer needs government subsidies to continue to grow?

In this article we will provide information on both the "heat" and the "overheating" of the UK biogas industry. First we will look at a case study where heat exchangers have been used, as part of a renewable heat system:

HRS heat exchangers creates anaerobic digestion plant for Muntons

heat exchanger in anaerobic digestion

The food sector has invested heavily in bioenergy projects such as biomass boilers and anaerobic digestion but where heat which is generated or used in one part of a process is lost rather than reused, according to HRS.

Image by cizauskas via Flickr
One of the most common situations where heat is wasted is where businesses have installed an AD plant to manage their food waste and factory by-products, said Matt Hale, international sales manager, HRS Heat Exchangers.

Heineken, Weetabix, Maltesers & Ovaltine

In most cases the primary energy output is electricity supported by Feed-in-Tariffs (FITs) which is used on site or exported to the grid,” he added.
The electricity is generated by a gas engine combined heat and power plant, but what happens to the heat? In some cases it is used for processing or heating the food factory, but often not to its full potential.
Implementing HRS heat exchanger technology, to use waste heat from one process to fuel another, could save food factories 7.5 pence per kWh² used.”
One such company is Muntons malted ingredients based in Suffolk, UK which supplies malt to Heineken beer, Weetabix, Maltesers and Ovaltine.
The firm uses 250,000 tonnes of barley to manufacture 180,000 tonnes of malt pa, which it sells the brewing and distilling industry and makes a range of malted ingredients used in food, confectionery and baking.
The company is currently putting the finishing touches to its £5.4m on-site anaerobic digestion (AD) plant. Integral to the success of the 499 kW facility is a 3 Tank Batch Sludge Pasteuriser System with Energy Recovery from HRS Heat Exchangers, which will help turn 80,000 tonnes of Muntons’ liquid malt waste into biogas and organic fertiliser.
This biofertiliser will be then be applied to local farmland, helping the company’s network of growers to produce the barley needed to make Muntons’ malt.
“For Muntons, this whole project has been about maximising efficiency. Although they have an abundance of heat, they still wanted to recapture what they could and our heat exchangers will provide at least 40% heat regeneration,” said Hale.

AD is a fast-growing industry in the UK 

He added AD is a fast-growing industry in the UK and has seen a steep rise in operational plants: from 192 in 2009 to 335 in January 2015. AD could deliver 10% of Britain’s domestic gas demands and reduce UK greenhouse gas emissions by 2%+ if industry reaches its potential: 40TWh of energy.Via HRS heat exchangers creates anaerobic digestion plant for Muntons

Gaunts Estate Anaerobic Digestion District Heating

Gaunts Estate near Wimborne, Dorset is the site of three new district heating schemes, powered by three separate anaerobic digestion plants.

Throughout the schemes, 1600m of REHAU’s flexible, pre-insulated RAUVITHERM pipework is being installed to connect the AD plants to the various farms, dwellings and countryside buildings on the estate.

The huge jump upward in the quantity of United Kingdom gas which was supplied by biogas from anaerobic digestion (AD) and landfill gas last year, has been lept upon by the UK government as evidence that there is a similar overheating of the biogas industry in the UK to that seen in solar power farms, and wind turbines, and seems to have given them an excuse to reduce subsidies. 

The degree to which the industry has been "heating up" (in other words over-achieving government targets) making Conservative politicians confident that they can save UK taxpayers money, and still achieve EU climate change targets, is shown in the paragraphs below.

Parliamentary report shows green gas heating up

In 2014, the UK produced 37 billion cubic metres (bcm) of natural gas and biogas combined; 2.6bcm of which was generated from AD and landfill. Since then the biomethane industry has quadrupled in scale, with 40 gas-to-grid plants now generating enough indigenous gas to heat over 100,000 homes or fuel around ten per cent of the UK’s bus fleet. POST estimate that UK natural gas production will fall from 2016, with biogas becoming an increasingly important part of our gas supplies. 
The POST report’s release comes a week before the Spending Review, which will set out the government’s plans for future support for biomethane, and follows a recently leaked letter from the Energy Secretary, Amber Rudd, to her Cabinet colleagues that appears to signal recognition for biomethane’s role in a sustainable UK energy mix.  
 ADBA’s Chief Executive, Charlotte Morton, commented:

The fact that green gas represented 7% of the UK’s indigenous gas supply in 2014 represents a colossal milestone for the biogas industry. And the timing could not be better as the Chancellor considers the future of the Renewable Heat Incentive, which is crucial to facilitate further growth in biomethane, in his Spending Review announcement next week.
With continued support for additional biomethane capacity, anaerobic digestion could potentially meet 30% of UK domestic gas demand.
The UK needs 20TWh more renewable heat by 2020 to meet the government’s 12% target – biomethane could deliver a third of that. via Parliamentary report shows green gas heating up | News | ADBA | Anaerobic Digestion & Bioresources Association
Has the UK government cut the biogas subsidies so hard that they kill off the young UK anaerobic digestion plant industry, and ruin the UK's, so far, good record of compliance with climate change targets? They seem not to care about removing the heat, but will the industry go too far off-the-boil?

We will report on the effects of recent UK government announcements on biogas plant subsidy reductions again in a further posting to this blog soon.

Saturday, November 28, 2015

The Latest Development in Home Sized Anaerobic Digestion Plant Units

It was only a matter of time before someone hit upon the idea of crowdfunding to finance the development of an anaerobic digestion plant designed for western/ developed nation use.

As a long-standing anaerobic digestion and biogas blogger I am often asked in the emails I receive, where the enquirer can buy a home biogas unit. If the request is for a single household sized unit, until now there has not been a system which I considered was available in the US, UK or Europe, with full support from a reputable supplier/ installer at any price.

I have been advertising a "home made biogas unit" on my blogs, for a while now, and although there have been a few DIY blueprints available to buy and download online, I have found that the number of individuals in the wealthy nations who wish to make a biogas plant themselves, are very few and far between.

Now all that appears to be changing. It seems that there is a pre-built package unit, as described below, that presumably comes delivered and ready to switch on and fill with organic household waste, the market for such a biogas unit may be much larger. It will be interesting to see if that is the case.

Watch the sales video below:

Call me a skeptic if you like, but I do still doubt that many will buy this, even if the 2-4 hours of cooking time daily proved to be correct,. However, the cooking time stated is well above the biogas generation rate usually attributed to such systems. 

In addition, in the "wealthy west" not many people will want to mess around with their food waste, let alone spend time mixing pet litter with water in order to put it into the digester. 

There may be a market for this product nevertheless in colleges, and universities, plus maybe even schools, where students can be given projects to demonstrate how biogas can be made.

But, until proved to me otherwise I don't think there will be many household takers even at the current reduced current price, but I would be delighted to hear from readers in feedback (use the comment box below) that I am wrong.

Home sized biogas unit lets you convert your own organic waste into cooking fuel

It’s never been easier to generate your own power. Israeli startup Home Biogas has developed a relatively affordable home-sized biogas unit that allows people to convert their own waste into fuel. The compact unit, which is currently running a crowdfunding campaign to support its production costs, lets everyday homeowners convert their organic waste into enough gas for 2-4 hours of cooking and 5 to 8 liters of liquid fertilizer per day.
© HomeBiogas
 The HomeBiogas unit is a perfect match for homeowners who would like to start a full-cycle waste recovery system in the comfort of their own home. The unit has the ability to take in up to 6 liters per day of any food waste or up to 15 liters per day of animal manure and turn it into fuel for cooking as well as organic fertilizer.
© HomeBiogas
HomeBiogas is being marketed to the average homeowner, either already off-grid or just looking into a “homemade” renewable energy source. According to the system details, the unit can convert just one kilogram of food waste into about 200 liters (7 cubic feet) of gas, more than enough to fuel an hour’s worth of cooking.
In addition to its reasonable cost and exceptional environmental value, the sleek rectangular unit is quite easy to use and easy-to-assemble. In fact, it measures in at 48”x65”x39.4” and weighs less than 88 pounds.
If you’re interested in buying the HomeBiogas unit, the company is offering supporters an opportunity on their crowdfunding page to reserve one with a pledge of $890. Once the campaign is over, the unit will go back to its regular retail price of $1500.
via Home sized biogas unit lets you convert your own organic waste into cooking fuel
Mean while Treehugger has a slightly different view on this:

Home-sized biogas unit turns organic waste into cooking fuel and fertilizer, for under $900 : TreeHugger

A startup from Israel has developed a home-sized biogas unit that can take organic waste and convert it into enough gas for 2-4 hours of cooking, as well as 5 to 8 liters of organic liquid fertilizer, every single day.
The accurately-named HomeBiogas device could herald a new dawn for full-circle local waste recovery for both on- and off-grid homes, because it has the ability to take in up to 6 liters per day of any food waste (including both meat and dairy, which are often not recommended for home composting) or up to 15 liters per day of animal manure (including pet waste, which is also considered a no-no in home composting), and turn that into enough fuel to cook several meals per day, while also producing a rich organic fertilizer that can boost soil fertility and garden yields.
While many home biogas initiatives tend to be focused on the developing world, where animal and human waste can be converted into a clean-burning fuel for cooking or heating water, providing a renewable local energy source, this project is aimed at the suburban market, where it can function as a valuable component of a home's energy network, either as an adjunct to grid-based systems or as an off-grid accessory.
According to HomeBiogas, 1 kilogram of food waste can produce an average of about 200 liters (7 cubic feet) of gas, which can fuel an hour's worth of cooking over a high flame, so with a full daily input of 6 liters of organic waste, the company's units can produce several hours of cooking gas each day, and can help homes eliminate one ton of organic waste each year, and avoid generating the equivalent of 6 tons of CO2 annually. Via Home-sized biogas unit turns organic waste into cooking fuel and fertilizer, for under $900


So, here you have it. Is this really going to be the first true Home Biogas Plant for the developed world, turning waste into gas and fertilizer?

Food waste and declining energy sources are major environmental hazards.
Biogas is the solution it's a natural process in which organic waste is converted into cooking gas so five years ago we went on a mission to bring biogas to every home regroup the best engineers scientists designers and product people togethere Markiting manager of HomeBiogas Ron Yariv Said:
Homebiogas is the first family sized user friendly affordable biogas system.
It is the [latest biogas digester design] and you can put it in your backyard. This home biogas plant comes in and easy to assemble kit and it uses a simple-as-can-be [system] just [by] throwing your organic waste in there. You go [and get your]  hot stove ready for cooking. [It produces] a cycle of in-house energy and it runs with no electricity or leftovers, [but also it] provides you [with a claimed] two to three hours of energy and [you fill it with]... handy kitchen leftovers, including meat and dairy products.... even your pet's litter. via Home Biogas Plant -Turning waste into gas and Fertilizer - Do Science!

Let's have your opinion. Is this worth buying?

Saturday, November 14, 2015

Anaerobic Digestion Companies Grow From Hundreds to Over a Thousand in Just 10 Short Years

Anaerobic digestion companies are a major growth sector within the global marketplace. Until 10 years ago there were probably no more than 100 companies in the developed nations which were actively trading as anaerobic digestion companies, or perhaps would also have been known as biogas companies, and now there are likely to be over a thousand.

Anaerobic Digestion (AD) is a natural process which will never be patented, it is as old as life on earth. The process was one of the very first to evolve on earth, we know that because AD was taking place before there was oxygen in the earth's atmosphere. AD is simply the umbrella term for any reaction where plant and animal materials (known as biomass) are broken down by micro-organisms without there being any air present. In fact anaerobic digestion only takes place when air is not available, at least not enough is present for aerobic degradation, and it makes methane gas as an inevitable consequence of the sequence of complex biochemical reactions it entails.

The process being more than a short time "out of patent" (millions of years!?), leads to the possibility that anyone can design and build AD Plants using this process, and many companies have been created to do just that!

Main Types of Anaerobic Digestion Companies

There are now a number of different types of anaerobic digestion companies. There are anaerobic digestion specialist companies which will design, build, and construct a complete AD Plant (DBC Contractors). Some of those contractors will go further than that even and will maintain and operate their AD Plants as well as DBOOT Contractors (Design, Build, Own, Operate, Transfer).

There are also specialist contractors, calling themselves AD Companies, which design and build just part of a biogas plant, such as the heat exchangers, and/or CHP equipment

Within the sector of Design and Build Contractors in the developed nations  these companies are usually, as a general rule, specialist companies in one, or at most two, of the following anaerobic digestion plant client sectors:

a) Sewage sludge treatment and biogas production
b) Agricultural sector biogas plants
c) Waste Management Sector anaerobic digestion plants for processing the organic content of residual (also known as "black bag") household domestic waste, and food waste biogas plants.

Some of these companies specialise in one of the commonly optimised temperature ranges of biogas reactors, this being in either mesophilic or thermophilic biogas plants, and others offer two stage AD Plant variants in pursuit of improved reliability, efficiency and better profitability.

In all these sectors you will now also find both companies (i) which apply the normal accepted design criteria to their plants, and, (ii) innovation companies that offer what are presented as "high-tech" versions of the standard biogas plant, which claim, and in many cases no-doubt do achieve, higher gas yields and lower sacrificial energy burdened plants.

The normal accepted "standard" design for biogas plants is the process which is known as a completely mixed reactor process AD Plant. This is the most "tried and tested" type. These comprise 90%, or more, of the anaerobic digestion plants which can be seen dotted about the landscape. They are easily spotted for their large circular based reactor tanks, over which there is is a plastic material covered dome, in which the biogas collects.

However, as soon as someone creates a "rule" there are always examples which break it! That is certainly the case for a number of anaerobic digestion companies which operate novel digester designs.

Examples of these are the contractors which have developed their own designs in the following types of biogas processes:

a) Dry Anaerobic Digestion
b) Low Temperature Anaerobic Digestion and Low Organic Solids Content feedstocks
c) Ultra high temperature (ocean floor fumerole) micro-organism elevated pressure type reactors.
d) Upflow Anaerobic Sludge Blanket (UASB) reactors.

Then there are also companies offering optimised plug flow Anaerobic digestion processes, and those that provide a technology which is claimed by its advocats to hold the advantages of both completely mixed reactors and plug-flow reactors, known as hybrid anaerobic digestion plant designs.

This all may seem to add-up to a highly complex and confusing market for the newcomer to anaerobic digestion to navigate through in order to find the best anaerobic digestion company for their needs. So, we will now try to make it a little easier, by directing you toward some of the players in this market, as below:

Examples of Anaerobic Digestion Contractors

Cambi AS was one of the first AD Plant Contractors. It is:

"an international supplier and operator of advanced and profitable sludge and biowaste treatment plants. The plants are based on Cambi`s patented Thermal Hydrolysis Process (THP), a pretreatment for anaerobic digestion. The THP significantly increases biogas production and digester loading, increases dewaterability and produces a pasteurized biosolids/soil ...
Bioprocess Control is a technology and market leader in the area of Advanced Instrumentation & Control Technologies for research and commercial applications in the biogas industry. The company was founded in 2006, and today brings to market more than 15 years of industry leading research in the area of instrumentation, control and automation of anaerobic digestion ...
Organic Recycling Systems Private Limited (ORS) is one of the pioneering companies in the field of organic waste processing and treatment. We provide products, services and solutions for efficient waste management. We convert waste into resource. By utilising our technical collaborations, we have introduced leading innovative technologies in India. We combine our ...
Zero Waste Energy, LLC was founded in 2009 and incorporated in 2010 in San Jose, California, by an experienced group of innovative solid waste industry leaders. They recognized the value in the best use of waste feedstock and the systems needed to sort out high value commodities and to generate renewable energy. ZWE’s principal goal has been to design, construct, and ...
SEaB is an international, UK based company working in the renewable energy and energy from waste sectors. The company is located at the University of Southampton Science Park in Chilworth on the outskirts of Southampton, UK.SEaB has developed and patented MUCKBUSTER® and Flexibuster™ compact easy to install turnkey anaerobic digestion (AD) systems which have the potential ...
NorthEast Biogas, LLC works with organic waste producers to profitably generate renewable energy, capture value of greenhouse gas emission reductions, mitigate environmental risks, create new revenue streams, and reduce waste management costs. We use only proven technology systems from a variety of manufacturers, chosen to best match site specific needs, and, as the ...
Two anaerobic digestion technology companies in the United Kingdom Biogen Ltd. and Greenfinch Ltd. [have merged] to form BiogenGreenfinch. The newly formed company will be supported by a $28 million investment from Bedfordia Group PLC, the parent company of Biogen, according to Dan Poulson, chief executive officer of  BiogenGreenfinch.
Established in 2005, Biogen funds, builds, and operates anaerobic digestion plants that convert food waste and animal manure slurry into biogas and fertilizer. Greenfinch is a process engineering company with more than 30 years of experience providing anaerobic digestion technology for the processing of sewage, manure, and food waste. Together, the companies have developed 12 anaerobic digestion plants throughout the U.K. The new company BiogenGreenfinch will employ 43 people.

A number of these contractors are featured on the Biogas Installer website here.

Saturday, November 07, 2015

CHP and 3 Important Considerations When Designing Combined Heat and Power Systems

An Introduction to CHP

Add caption
Combined heat and power (CHP) systems, are also known as cogeneration systems, and they greatly improve the usable energy output from electricity generation systems. When a gas engine or turbine is used to generate electricity without CHP, after the electricity leaving the site, there is also hot "cooling water" that is used to keep the jacket around the engine and generator windings cool.

Usually, this heat energy is not used, and goes to a cooling plant, which is usually primarily a radiator and a fan based cooler which vents the heat to the atmosphere. In CHP (combined heat and power) systems, that heat is used in some way, and the most common method is to send the hot water through an insulated pipeline to a space heating radiator in a remote office, or factory, or the hot water delivered may be used to warm more water for industrial hot water uses. The result is that CHP provides a lot more useful thermal energy in an integrated system.

This means that CHP is not a technology, but a concept, there are many ways to apply different technologies to CHP. Heat is used when it would otherwise be wasted during the normal methods of separate generation of heat and power. It is hard to appreciate just how big the benefits of anaerobic digestion heat CHP can be. Experts say that the conventional methods of producing usable heat and power separately usually achieves no better than a combined efficiency of use of the original energy output of 45%, amazingly CHP systems operate at levels as close to 80%. Just stop to think for a moment now, just how wasteful the normal method is.

3 Important Considerations When Designing Combined Heat and Power Systems

  1. Payoffs for adding CHP to an existing biogas generation plant installation can be fast, and as quick as 12 to 18 months, but not always. It is essential to do some detailed analysis of the true value of the heat you will gain from installing heat exchangers to output this useful hot water. The heat (hot water) from any CHP system is only going to be as hot as it now enters the cooling system. Check that this will be hot enough for the purpose the hot water, or heat will be used. For space heating it is usually fine, but just remember that it will not be hotter than the cooling jacket temperature.
  2. Next check the synergy of time. The hot water produced will need to be output at the times when it is needed. For example, if the heat is to be used for crop drying, does the crop drying requirement coincide seasonally with the usage of the generation equipment? That output may be used, in some cases, only at times when the electricity company pays the best rate each day for the power. Conflicts of this sort are likely to occur, and this is not a problem as long as the calculation of the value of the CHP power is done in a way that makes due allowance for them. Although there may be on-farm uses they may prove to give a lower payback than for instance installing a longer insulated pipeline to a nearby factory which has a 24/7 demand for hot process water.
  3. Make sure that you also make a realistic evaluation of the current costs of the power that the CHP energy source would replace. At the current time of writing, electricity tariffs and diesel costs per litre have been dropping due to the low cost of oil. Take a view on the extent to which that drop may continue and build-in a margin for a further potential drop, making sure that the investment decision takes a cautious approach.

You may also find the following article useful:

The Biogas Engine – Defined And How They Provide Biogas Generation of Electricity

There are a number of advanced and proven gas engines utilized for biogas generation by the biogas generator manufacturers. They are maximized for biogas use, in a way that ensures that their combustion chambers provide the highest degree of performance possible.

Lubricating oil is dispersed throughout the engine’s moving components to keep the tool running smoothly as well as to lower wear. Proper treatment and also upkeep of the generator engine will certainly guarantee many years of problem complimentary usage.

Nevertheless, failure to deal with normal upkeep is a sure means to attractive trouble. This is definitely real when it comes to the engine’s lubricating oil.

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