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Anaerobic digestion technique

The process of the organisms being decomposed by anaerobic bacteria under anaerobic conditions that produce methane and carbon dioxide called anaerobic digestion. BODA had successful developed and applied anaerobic digestion technique to chemical wastewater treatment since 2005. In recent years, we have been investing continuously in urban domestic organic waste treatment.

Anaerobic reactor:

Cycle stirred biogas and sludge, good stirring effect is benefit for the use of methanol for carbon dioxide.

Technical features of anaerobic digestion technique:
  • Reduce sludge volume

    Reducing the degradable organic content in sludge and reducing the volume of sludge. Generally, the volume of sludge could be reduced by 1/2~1/3 after digestion.

  • Stabilize the nature of sludge

    Reduce the amount of degradable and corrupting materials in sludge to stabilize the nature of sludge.

  • Improve the dehydration effect of sludge

    The sludge is viscous colloidal structure and not easy to dewatering before digestion. After digestion, colloidal materials are gasified, liquefied or decomposed, so that the moisture and solids in sludge are easy to be separated.

  • Use the methane gas generated

    During the digestive process, the sludge would produce methane, in which useful methane gas is about 2/3, it can be used as fuel for pwer generation, burning boiler, driving machinery and so on

  • Eliminate stench

    During the anaerobic digestion process, the sulfuretted hydrogen would separate sulfur molecules or combined with iron to become iron sulfide. Therefore, the sludge after digestion will never have stench again.

  • Improve the hygienic quality of sludge

    There are a lot of toxic substances in sludge like bacteria, pathogenic microorganism and parasitic ovum, which is particularly unsanitary. The methane bacteria produced during the digestive process owns strong antibacterial action, which can kill most pathogenic bacteria and other harmful microorganisms, and make the sludge sanitary.


High concentration organic wastewater pre-treatment; Urban domestic organic waste