29 July 2011

Anaerobic Digestion Makes Renewable Energy from Rubbish

An Anaerobic Digestive system which is appropriate for processing mixed waste has been developed from technology first developed in Israel. It recovers resources from waste while making renewable power and helping to reduce carbon emissions. The ArrowBio process has been developed thru a sequence of pilot and demonstration plants to a level prepared to be used commercially in numerous nations according to its developer, and is, they ssay, most fittingly described as a water-based mechanical biological treatment (MBT) facility, with energy recovery. ArrowBio's process has been developed in precisely the way that it can either be used as a stand-alone solution or together with other technologies.




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As an example, the supplier says that it can be built inside viable energy parks to offer a power source for the park alongside recycled materials for further processing. The recycled materials are re-used as feedstock by the other enterprises based in the park to make a spread of products. 2 Stage Anaerobic Digestor ArrowBio starts out to entirely recover and wash the reusable components of the waste, so it should be favoured by environmental groups which have a tendency to object to alternative processes which handle mixed waste, like incineration, on the proposition the capability of incineration to handle mixed wastes decreases the prerequisite to split and recycle, and therefore the influenza gas can contain noxious chemicals. The discussion is also that incineration makes it too straightforward to neglect recycling, so it shouldn't be used.


None of these beefs apply to Anaerobic Digestion. The process is stated by the company to have at its core a two stage anaerobic digestor that has been optimised for better energy yield than competing systems, from each unit mass of organic matter processed. Removing the maximum available gas yield, is in truth a stated first purpose of the ArrowBio processs. This is recognized as good policy environmentally, and naturally the gas and, or electricity generates cash, which helps to pay for the upkeep of the plant. The process is composed of 2 distinct yet integrated parts : a "front-end" wet Materials Recovery Facility (MRF) and a "back-end" advanced anaerobic digestion system.


The wet MRF, Arrow-Bio states, mixes standard solid waste handling technology together with liquid and slurry pumping, water based processing helps, passive separation, and cleaning of recyclables and their automated conveyance round the facility, while also suppressing odours and dust. The wet MRF cleans, and recovers, ferrous metals, non-ferrous metals and plastics parted by type. These are then sorted into recycled materials of varied grades that may be sold right into the recycling market. A "hydrocrusher" has additionally been successfully developed by ArrowBio, the company says, which is part of the wet ( anaerobic ) process. In effect the bio-degradable waste is jetted with high pressure jets of water thru a sequence of pipes. Food and paper is ripped to shreds, significantly rocketing the surface area available to biological action, while at the same time holding the organic chemicals in a watery solution.


Any waste that's not recoverable or that's not sent thru the anaerobic digesters exits from the ArrowBio facility as a residual waste, and is typically present in only in minor quantities, they say. The 1st part of ArrowBio's anaerobic digestion process is often known as the acidogenic stage, and the 2nd is a methanogenic stage.


The biomass achieves perfect potency compared to single tank AD, they say, and includes optimization of pH levels, temperature and residence times is attained instantly. The plant has claimed low emissions. The ArrowBio design wishes for no expensive gas washing stage, we are told, and the principally water borne method doesn't produce the wearisome ( dust, odour, etc ) emissions experienced from other processes. Recognition of the supportability of Anaerobic Digestion is rising fast. Learn more about this technology for the future at the Anaerobic Digestion internet site, and more on the ArrowBio AD Process.


Read more about the AD process now. Visit the ArrowBio article at Anaerobic Digestion.Com..


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21 July 2011

Arla Foods and Xergi Progress with Largest Biogas Plant in Denmark

The ambitious project to establish a new biogas plant to supply Arla’s production at Videbæk, Denmark, is now entering a new phase. Arla Foods amba and Xergi A/S have agreed to continue their partnership on the project which is yet to be described in detail and obtain official approval.

Arla Foods amba and Xergi A/S have established a basis for decisions for the construction of a biogas plant which is to supply the energy-hungry processes at Danmarks Protein (DP) and Arinco with biogas instead of natural gas. The plant will be capable of reducing CO2 emissions from production. The plant will produce 16 million cubic metres of methane from agricultural animal manures and waste products from Arla’s own production.

The plant will be the largest biogas plant in Denmark.

It has been agreed that Xergi A/S will handle project development, construction, operation and maintenance of the new biogas plant. Povl Krogsgaard, Senior Vice President at Arla Foods, is delighted that work is progressing on the project and sees it as a natural part of Arla’s development:

“The initiative should be seen as part of Arla Foods’ climate strategy where our ambition is to reduce our CO2 emissions by 25% by 2020. We hope that the initiative will benefit the climate as well as farmers and investors. It is, however, a prerequisite that the right framework is in place for biogas which we are now able to clarify as we have a more precise basis for decisions. Until further notice, we see this as a very positive step on the way.”

Jørgen Ballermann, Managing Director of Xergi A/S, is delighted that Xergi has been chosen as Arla Foods partner. “The project supports our strategy of being a leading supplier of biogas technology for the processing and exploitation of animal fertiliser. The project will be of a size and importance that will provide a benchmark for the industry both nationally and internationally.”

Ove Kloch, Chairman of the Board of Xergi A/S, is also looking forward to the partnership which is in line with Denmark's environmental ambitions.

”We hope that, with this initiative, we will help to push developments in the biogas industry in Denmark in the right direction and contribute to the government's ambitions of using 50% of animal manures in Denmark for biogas.”

It is expected that official processing and project development will take approximately two years and that the plant will be ready for biogas production by 2015.

See original press release at Xergi's website here.

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