Biogas Recovery in Anaerobic Digesters

Anaerobic digestion (AD) is an effective means of degrading organic wastes which leads to Biogas Generation by the synergistic effort of a consortium of microorganisms. It is a natural treatment process and, as in composting, bacteria break down bulk organic matter into bio-methanated spent wash. Unlike composting, Anaerobic Digestion is carried out in an oxygen-free (anaerobic) environment. Biogas Generation is an eco-friendly process of energy production from wastes.

IETL offers tailor made anaerobic digesters for treatment of organic effluents ranging from low to high concentration industrial effluents, municipal sewage, and other organic biomass. Anaerobic Digestion process leads to Biogas generation which is a non-conventional source of energy which is effectively used for domestic cooking, heating and power generation resulting into substantial revenue savings at optimum costs.

There are three primary process through which Biogas generation can be achieved viz. Up-flow Anaerobic SludgeBlanket (UASB), Continuous Stirred-Tank Reactor (CSTR) & SLURRY Digesters.

• UASB Anaerobic Digester finds its application for treatment of effluents ranging from low to high BOD/COD concentrated streams like distillery spent wash, black liquor, textile, pharma and bulk drugs, food processing, dairy, starch, yeast, slaughter house, etc. The UASB process can operate at higher loading rates resulting into higher BOD/COD.
  
  
• SLURRY Digester BIOSTIR – These Anaerobic Digesters are mainly used for treatment of organic biomass containing very high solids such as cow dung, poultry droppings, etc. which require higher retention, continuous stirring and which are flexible to operate under continuous and batch operations.