焦化废水生物脱氮的试验研究

Research of Biological Nitrogen Control of Coke Plant Wastewater

采用单相活性污泥法对焦化废水进行了试验研究。研究结果表明:当进水NH_3—N浓度为300mg/L左右,COD为1200～1500mg/L,酚浓度为100～380mg/L,CN^-为10～30mg/L,在系统总水力停留时间为27h和混合液回流比为400％的条件下,出水各项污染指标均达到国家排放标准。

This pilot - scale study is undertaken to treat coke plant wasfwaters containing high concentration of ammoniacai nitrogen with single activated sludge system. When the influent concentration of NH3 - N,COD, phenol and CN- is 300,1200-1500,100-380 anol 10-30mg/L,respectively;the system total HRT is 27 hours and the recycle ratio is 400%; After having been treated by single activated sludge system,each pollutant concentration is up to the discharge standard(GBl3456-92).