污泥减量化条件的优化

Optimization of sludge reduction conditions

将取自城市污水处理厂的活性污泥接种在人工模拟废水中,待性质稳定后进行序批实验,通过混料实验的设计方法研究Cu2+、Zn2+和pNP(对硝基酚-pNP)联合使用对污泥增长率的影响.结果表明,当Cu2+、Zn2+、pNP的浓度分数分别为0.492 9、0.400 0和0.107 1,相应地其实际浓度分别为4.93mg.L-1、4.0 mg.L-1和1.07 mg.L-1时污泥增长率为0,抑制剂和解偶联剂的联合使用可有效减少剩余污泥的产生.

The activated sludge taken from the urban sewage plant were inoculated into simulated wastewater and then used to perform sequencing batch experiment. The mixture design approach was applied to exploring the effects of combination of Cu2 ＋, Zn2＋ and paranitrophenol （pNP） on sludge growth. The results showed that the sludge growth rate reached zero at the fractions of 0.492 9 for Cu2＋, 0. 400 0 for Zn2＋ and 0. 107 1 for pNP, accordingly their actual concentration were 4.93 mg L-1 , 4.0 mg L-1 and 1.07 mg L-1 , respectively, suggesting that the combination of inhibitors and uncoupler can effectively reduce excess sludge production.