摘要：
研究了不同氯离子和钙离子浓度下活性污泥系统的沉降性能、COD去除率以及生物相变化规律。结果表明,对于COD为3 500 mg/L的废水,当Cl-<7 000 mg/L、Ca2+<3 940 mg/L时,COD去除率能达到90%以上,钟虫、轮虫等指示性微生物能在此浓度范围内生长、繁殖,污泥活性良好;当废水中Cl-和Ca2+质量浓度分别升至21 000、11 800 mg/L时,COD去除率下降至70.6%,此浓度范围内指示性微生物消失,嗜盐菌逐渐繁殖,活性污泥法仍具有明显的处理效果;继续升高废水中Cl-和Ca2+的浓度,COD去除率急剧下降,污泥解体,活性污泥系统趋于崩溃。
关键词:
高氯,
高钙,
高COD,
活性污泥法
Abstract:
The settling property，variations of biofacies and COD removing rate of activated sludge systems withdifferent Cl-and Ca2+ concentrations have been studied. The results show that when the COD is 3 500 mg/L，Cl- massconcentration less than 7 000 mg/L and Ca2 + mass concentration less than 3 940 mg/L，the COD removing rate reaches above 90%. In this concentration range，vorticella， rotifer and other indicative microbes are able to grow andreproduce，the sludge has high biological activity. When the mass concentrations of Cl- and Ca2+ increase to 21000mg/L and 11800 mg/L，the COD removing rate decreases to 70.6%. In this concentration range，the indicativemicrobes disappear，and halophilic bacteria begin to reproduce，the sludge still has high activity. If the concentration of Cl- and Ca2+ continued to rise，the COD removing rate will fall sharply and activated sludge system will crumble.
Key words:
high Cl-,
high Ca2+,
high COD,
activated sludge process
中图分类号:
罗立, 孔秀琴. 活性污泥法处理高氯高钙高COD废水的实验研究[J]. 工业水处理, 2011, 31(11): 74-76,77.
Luo Li, Kong Xiuqin. Experimental study on the treatment of high Cl- high Ca2+and highCOD wastewater by activated sludge process[J]. INDUSTRIAL WATER TREATMENT, 2011, 31(11): 74-76,77.