目的探寻适合改善我国北方地区重污染河道的一种实用技术,提出水解酸化-人工湿地处理工艺,达到改善其水质的目的.方法分析辽宁省白塔堡河流受污染状况,采用水解酸化预处理,经预曝气装置进行充氧,然后污水经人工潜流湿地进行深度处理的"水解酸化-预曝气-人工湿地"组合工艺对水体水质进行改善.结果白塔堡河污水采用水解酸化-人工湿地技术处理后,出水CODCr、BOD5、TP、TN、NH3-N和SS的质量浓度分别为20~30 mg/L、5.5~14 mg/L、0.11~0.47 mg/L、14~24 mg/L、2.3~7.6 mg/L和8~16 mg/L.系统对CODCr、BOD5、TP、TN、NH3-N和SS的去除率分别为75%~90%、90%~95%、90%~97%、50%~67%、76%~91%和79%~90%.结论水解酸化-预曝气-人工湿地技术处理白塔堡河污水能够取得良好的效果,出水水质中除ρ(TN)和ρ(NH3-N)较高外,CODCr、BOD5和TP的平均出水质量浓度均达到了《地表水环境质量标准》(GB3838—2002)中的Ⅴ类标准.
The hydrolysis acidification-constructed wetland combination treatment technology was studied to explore a suitable method for improving heavily polluted rivers in northern China as well as to improve the water quality. The pollution situation of the Baitapu river was analyzed. Firstly, the river water was pretreated with hydrolysis acidification, followed by aeration and then the sew- age was flowed to the constructed wetland for depth treatment. Results show that the mass concentration of COD,BOD5 ,TN,TP,NH3-N and SS are 20 - 30 mg/L,5.5 - 14 mg/L,0. 11 - 0.47 mg/L,14 -24 mg/L,2. 3 N7.6 mg/L and 8 - 16 mg/L,respectively. Removal ratios of CODer, BODs,TP, TN NH3-N and SS are 75% - 90%,90% - 95%,90% - 97%,50% - 67%,76% -91% and 79% -90%, respectively. Conclusion is that the proposed technology for treatment of the Baitapu fiver pollution can get good effects. Except of the obtained higher mass concentrations of TN and NH3-N, the average effluent water quality of CODcr, BOD5 and TP achieves to " V ",according to "the surface water environment quality standards" (GB3838-2002).