生物接触氧化法处理农村河道受污染水体中试研究

发布时间：2018-03-29 15:47

本文选题：生物接触氧化　切入点：受污染河水　出处：《科学技术与工程》2017年29期

【摘要】：为了提高生物接触氧化法修复农村受污染河道水体的处理效果,构建了处理规模为150 m~3/d的河道模拟装置,系统开展了生物接触氧化法处理农村河道受污染水体运行控制参数优化研究。讨论了弹性填料、组合填料、悬浮球填料在较佳工况下对CODCr、NH_4~+-N、TN、TP的去除效果。结果表明:气水比6∶1~8∶1、CODCr容积负荷0.1~0.5 kg/(m~3·d)、水力负荷2.4~7.2 m~3/(m~3·d)时,系统对污染物有较好的去除效果。中试系统较优工况运行时,相较于空白对照,装填填料对各污染物的去除效率提高20%~30%。组合填料对CODCr、NH_4+~-N、TN、TP的去除率分别稳定在74.87%、78.37%、34.39%、44.69%以上,优于弹性填料和悬浮球填料。研究结果可为提高生物接触氧化法对农村河道受污染水体处理效果提供技术支持,对生物接触氧化法修复受损河道水体工程实践具备一定的参考意义。
[Abstract]:In order to improve the treatment effect of biological contact oxidation method for the restoration of polluted river water in rural areas, a river channel simulation device with a treatment scale of 150 mm2 / d was constructed. The optimization of operation control parameters for the treatment of polluted water in rural river by biological contact oxidation method was studied systematically. The elastic packing and combined packing were discussed. The removal effect of CODCrn NH _ 4- N ~ -N ~ -TNTP by suspension ball filler in a better condition is obtained. The results show that when the volumetric load of CODCr is 0.1 ~ 0.5 kg/(m~3 / d and hydraulic load is 2.47.2 m~3/(m~3 / d, the system has a better removal effect when the ratio of air to water is 6: 1 ~ 8: 1. Compared with the blank control, the removal efficiency of each pollutant was increased by 20% compared with the blank control. The removal rate of CODCr-NH _ 4 ~ -N _ N ~ + TNT _ (TP) by the combined packing was more than 44.69%, respectively, at 74.87%, 78.37% and 34.39%, respectively. The results can provide technical support for improving the effect of biological contact oxidation on the treatment of polluted water in rural river. It has certain reference significance for the engineering practice of biological contact oxidation method to repair the damaged river water body.
【作者单位】：中国水利水电科学研究院;
【基金】：“十二五”国家重大水专项(2013ZX07104004) 科技部国际合作项目子课题(2015DFG71210-01)资助
【分类号】：X522

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