2,4-二氯酚对活性污泥产率影响的研究

Effect of 2,4-dechlorophenol on biomass yield of activated sludge

采用序批式活性污泥反应器试验研究了解偶联剂2,4-二氯酚(DCP)的污泥减量化效果。试验结果表明:随着DCP浓度的增加,污泥比耗氧速率(SOUR)增加,污泥产率下降;相对底物比降解速率(q/q0)和相对污泥比增长速率(μ/0μ)随DCP浓度变化曲线分离程度增加;1～5mg/LDCP能有效地减少剩余污泥产量,而不影响污水处理效果;解偶联模型能有效模拟解偶联剂浓度对污泥表观产率的影响。

The effect of excess sludge reduction by uncoupler of 2,4-dechlorophenol （DCP） was studied using Sequencing Batch Reactor. The results of the test showed that： with the increasing of the concentration of DCP, the specific oxygen uptake rate （SOUR） increased and the biomass yield of sludge decreased; The separation degree of the curves reflected the relative specific degradation rate of substrate （q/q0） and the relative specific growth rate of sludge μ/μ0） increased with the varying of the concentration of DCP; DCP ranged from 1 mg/L to 5 mg/L could effectively reduce the biomass yield of excess sludge without influencing the wastewater treatment effect; uncoupling model was able to simulate the effect of the concentration of uncoupler on the observed yield of sludge.