PLANT FOR SEPARATE STABILIZATION OF SEWAGE SLUDGE Russian patent published in 1999 - IPC

FIELD: plants for biological treatment of sewage waters. SUBSTANCE: plant has aerobic stabilizer 1 with pipeline 2 for sludge supply, spillway 3 and partition 4, methane tank 6 found inside stabilizer. Spillway 3 and partition 4 form mineralization chamber 7, biocoagulation chamber 8 with degassing system, and chamber 9 for thickening of stabilized sludge. Methane tank 6 is separated by partitions 11 and 12 into chamber of acid fermentation and chamber of alkali fermentation. Secured to partitions 12 by pairs with some clearance are additional walls forming bypass channels. Acid fermentation chamber has pipeline 19 for raw sludge supply. It is sound practice to place autoclave 20 with inlet pipe 21 for supply of steam and stabilized thickened mixture into its internal part and outlet pipe for discharge from autoclave of nutritious substrate to stabilizer 1, acid fermentation chamber and bypass valves. EFFECT: reduced capital and working costs and higher productivity. 5 cl, 5 dwg