School of Ecology and Resource Engineering, Wuyi University Fujian Provincial Key Lab of Ecological Industrial
Green Technology Fujian Provincial Academy of Environmental Science

针对煤气发生站产生的煤气洗冷废水含有难以生物降解的酚类、芳香烃、氨氮等有毒有害物质,会对人和环境具有很大危害的问题,通过EF-Feox法处理实际煤气洗冷废水中试试验,分别研究了电流、p H及H2O2投加量等因素对去除效果的影响,并采用三因素三水平中心复合试验进行响应曲面设计,综合考虑经济因素及工程可行性确定最佳工艺条件。结果表明:在p H为4.0、H2O2投加量为3.0 m L/L、电流为0.6 A,电解质Na Cl浓度为17 mmol/L、极板间距为100 mm、水力停留时间3 h条件时,废水中酚类的去除率可达92.82%;CODcr去除率不高,但可生化性(B/C)可由最初的0.09提高至0.44,适合作为生化处理的预处理。

According to hard biodegraded phenols, romantic hydrocarbon, ammonia nitrogen and other toxic and harmful substances in the washing and cooling wa ste water of the coal gas from coal-gas generation station, those substances would cause great harms to the human and environment. The EF-Feox method was applie d to treat an actual coal gas washing and cooling waste water in a pilot test and individually to study the current, p H, H2O2 dose and other factors affected to the remo val effects. A central complex test with three factors and three levels was applied to the design of the response surface. A comprehensive considered economic factor a nd engineering feasibility were applied to asset up the optimized technical conditions. The results showed that when the p H was 4.0, H2O2 dosage was 3.0 m L/L, curr ent was 0.6 A, electrolyte Na CI concentration was 17 mmol/L, space between the polar plates was 100 mm and hydraulic retention time was3 h, a removal rate of the p henols from the waste water could be 92.82%. The removal rate of CODcrwould not be high, but the biodegradability ( B/C) could be improved from an initial 0.09 to 0.4 4 and could be suitable the pre-treatment of the biochemical treatment.