[Effect of anaerobic acidification treatment on nitrogen removal and toxicity reduction of coke plant wastewater].
Coke plant wastewater was treated by anaerobic acidification-anoxic-aerobic (A1-A2-O) biofilm process and anoxic-aerobic (A/O) biofilm process respectively. Toxicity reduction effects of the two processes were compared. The toxicity of coke plant wastewater was equal to that of mercury chloride with concentration of 0.19 mg/L. Its toxicity reduction was related to the removal of organic nitrogen. Anaerobic acidification unit acted an important role on removal of both organic nitrogen and reduction of toxicity of the wastewater. After treatment by A1-A2-O process, its toxicity can be decreased greatly. When HRT was 37.9 hours, The relative luminosity of the treated effluent to photobacterium can attain 96.8%, that is equal to the toxicity of mercury chloride with concentration of 0.023 mg/L.
Li
Y
Y
State Key Lab of Pollution Control and Reuse Research, Tongji University, Shanghai 200092, China.
Gu
G
G
Qiu
Y
Y
Zhao
J
J
D000693:Anaerobiosis; D018441:Biofilms; D007220:Industrial Waste; D009584:Nitrogen / Q000302:isolation & purification*; D012722:Sewage; D018508:Water Purification
D007220:Industrial Waste; D012722:Sewage; D009584:Nitrogen