Upflow Anaerobic Sludge Bed reactor is a kind of sewage Anaerobic biological method, also called ShengLiuShi Anaerobic Sludge Bed, abbreviations UASB (the Up - flow Anaerobic Sludge Bed/Blanket).

Invented by professor Lettinga of the Netherlands in 1977.

Sewage is passed from the bottom up through the UASB.

At the bottom of the reactor there is a high concentration, highly active sludge bed, and most of the organic pollutants in sewage are degraded by anaerobic fermentation to methane and carbon dioxide.

Due to the agitation of water and bubbles, there is a suspended layer of sludge on top of the sludge bed.

The upper part of the reactor is equipped with a three-phase separator to separate the digestion, digestion and sludge particles.

The digestion gas is derived from the top of the reactor;

Sludge particles slide down into the sludge bed at the bottom of the reactor.

The digestive juice flows from the clarification zone.

UASB load capacity is very high, suitable for high concentration organic wastewater treatment.

The well-run UASB has high organic pollutant removal rate and does not need to be stirred to adapt to a large load shock, temperature and pH changes.

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