[Effect of 2-aminophenol and 3,3',4',5-tetrachlorosalicylanilide on biomass yield of activated sludge].
The effects of 2-aminophenol and 3,3',4',5-tetrachlorosalicylanilide on biomass yields were studied. The results shows that when AP is 15 mg/L and TCS is 1.2 mg/L, observed growth yields (Yobs) of the sludge are reduced by 21% and 52% with low reduction of COD removal efficiency. Removal rates of ammonia decrease by 32% with TCS but are not affected obviously by AP. The effects of AP and TCS on dewater ability and settle ability of sludge were also investigated. The dewater ability of sludge is not affected by the two uncouplers. The SVI values of sludge with TCS increase slightly. According to microscope observation, the sludge microbe population changes. Meanwhile quantities and kinds of protozoan and metazoan were reduced.
Dun
Mi-Na
MN
School of Environmental Science and Engineering, Shandong University, Ji'nan 250061, China. dxiaomi@yahoo.cn
Pei
Hai-Yan
HY
Hu
Wen-Rong
WR
D000627:Aminophenols / Q000737:chemistry*; D002244:Carbon / Q000032:analysis; D009930:Organic Chemicals / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012458:Salicylanilides / Q000737:chemistry*; D012722:Sewage / Q000032:analysis*; D014865:Waste Disposal, Fluid / Q000379:methods*
D000627:Aminophenols; D009930:Organic Chemicals; D000644:Quaternary Ammonium Compounds; D012458:Salicylanilides; D012722:Sewage; C027667:2-aminophenol; D002244:Carbon; C003390:3,3',4',5-tetrachlorosalicylanilide