高含水油泥调质脱稳用剂

高含水油泥主要来自于页岩气田、油气田和炼厂的污水处理场（站）,含水率一般高达90%以上,成分复杂、乳化严重,是性质稳定的多相体系。破胶脱稳是高含水油泥处理处置与利用的前提,也是减量化的瓶颈,其核心是调质脱稳用剂的优选。介绍了高含水油泥的性质及调质脱稳的原理和方法,阐述了高含水油泥调质脱稳用剂的研究及应用现状,总结了助滤剂、氧化剂、电解质、破乳剂、絮凝剂和微乳化剂等常用药剂的调质机理、适应范围、研究实例和优缺点,并提出了调质脱稳用剂未来的发展方向。

Treatment of Bleaching Wastewater in Dyeing and Printing Plant by Coagulation-Nanofiltration

The bleaching wastewater in a dyeing and Printing plant was treated by coagulation-nanofiltration process.The effects of coagulants and operation conditions on the effluent COD and turbidity were studied.The optimum conditions for coagulation are as follows:sulfuric acid used as coagulant,coagulation pH 1.0.The optimum conditions for nanofiltration are as follows:running pressure 1.86 MPa,running temperature 20 ℃,influent pH about 7,concentration multiple 1.Under these conditions,the COD of nanofiltration effluent is decreased to about 30 mg/L with 95.4% of total COD removal rate,the effluent turbidity is 0 with 100% of total turbidity removal rate.The quality of the effluent can meet the industrial water reuse standards.