摘要：
采用后继混凝沉淀的A/O工艺对含酚、氰的焦化废水进行了处理,运行结果表明:废水中酚质量浓度从287～681mg/L降至1.0mg/L以下,氰化物质量浓度从0.72～11.4mg/L降至0.5mg/L以下,完全达到了《污水综合排放标准》(GB8978—1996)的二级排放标准;CODCr从3879～6378mg/L降至116.1～184.2mg/L,氨氮从145.6～200mg/L降至11.64～25.26mg/L,大多数时间达到排放标准。
关键词:
氰酚废水,
好氧工艺,
厌氧工艺,
混凝
Abstract:
Steel pickling waste has been treated by using a 5 L airlift membrane reactor which couples with a 19-channel porcelain membrane element.The results show that when the aeration volume is in the range of 0.5-2.5 m3/h，membrane flux can be maintained above 60 L/（m2·h）.In addition,increasing the aeration amount is good for increasingthe circulating liquid flux.Under stable operating conditions,the suspended solids concentration of ferrichydroxide in liquid,temperature（1-45 ℃） and operation pressure（0.025-0.1 MPa） show a linear relationship withmembrane flux.Under the following conditions： Fe2+ mass concentration is 400 mg/L of pickling liquid waste,dissolvedoxygen 70%,pressure difference 0.1 MPa,room temperature 18-25℃,pH 6-9,and the hydraulic retentiontime 2 h,the turbidity of effluent water is <2 NTU,pH accords with the national discharge standards.
Key words:
phenol and cyanide wastewater,
aerobic process,
anoxic process,
flocculation
中图分类号:
张晓辉, 皮科武, 胡林, 崔建宇, 曹奇光. A/O—混凝工艺处理氰酚废水的研究[J]. 工业水处理, 2009, 29(11): 56-58.
Zhang Xiaohui, Pi Kewu, Hu Lin, Cui Jianyu, Cao Qiguang. Study on the treatment of phenol and cyanide wastewater by A/O-flocculation process[J]. INDUSTRIAL WATER TREATMENT, 2009, 29(11): 56-58.