双层人工快渗处理化工桶清洗尾水工艺优化研究  

Study on Optimal Treatment for Cleaning Wastewater of Chemical Barrel with Two-layer Constructed Rapid Infiltration System

作　　者：林康 邢涛 佟洪金 雍毅 侯江 孟旭 林蕊 LIN Kang;XING Tao;TONG Hong-jin;YONG Yi;HOU Jiang;MENG Xu;LIN Rui(Sichuan Province Environmental Protection Technology&Engineering Co.,Ltd.,Chengdu 610000,China;Sichuan Academy of Environmental Sciences,Chengdu 610041,China)

机构地区：[1]四川省环保科技工程有限责任公司,成都610000 [2]四川省生态环境科学研究院,成都610041

出　　处：《四川环境》2025年第1期123-130,共8页Sichuan Environment

摘　　要：化工桶清洗废水污染物含量高、成分复杂,其尾水需进一步深度处理,目前仍缺乏有效技术手段。而人工快渗系统(Constructed Rapid Infiltration system,CRI)经长期驯化的特殊降解菌群,有望针对性降解该尾水污染,但采取何种工艺,参数如何调配仍不清楚。因此,以某公司化工桶清洗废水尾水为研究对象,采用双层人工快渗处理,以提高尾水中COD(化学需氧量)、BOD_(5)(生化需氧量)、NH_(3)-N(氨氮)、TP(总磷)和TN(总氮)的降解程度为目标,利用正交实验法优化了系统填料层厚度、淹水时间、水力负荷和湿干比四参数的最佳运行工艺:填料90cm,淹水时间1h,水力负荷为80 L/m^(2)·d;湿干比为1∶3。其中,BOD_(5)和NH_(3)-N降解率受各因素影响较小,波动范围分别为95.68~98.37和94.49~97.65,进水水质水量变动时可不考虑更改工艺参数。TP降解主要影响因素为填料厚度,其次为淹水时间。当进水TP增加时,应增加填料厚度或更换填料,并延长淹水时间。而COD和TN降解率在主要影响因素湿干比为1∶3的情况下,淹水时间越短,越有利于COD去除,淹水时间越长,越有利于TN去除。实际运行时应先确定实时水质中,COD和TN何者为主要污染指标,再调整最优淹水时间。研究结果可为特殊行业尾水处理及工艺实时优化提供技术参考。The wastewater from cleaning of chemical barrels necessitates further deep treatment due to its complex composition and high concentration of pollutants.However,effective technological solutions are unavailable to address this problem now.It is expected that the Constructed Rapid Infiltration(CRI)system will mitigate tail water pollution with special degrading bacteria after the long-term acclimation.Nevertheless,the specific processes and application parameters remain unclear.Therefore,the cleaning tail water from chemical barrels of a company was taken as an example in the paper.We adopted double-layer CRI treatment to improve degradation of chemical oxygen demand(COD),biochemical oxygen demand(BOD_(5)),ammonia nitrogen(NH_(3)-N),total phosphorus(TP)and total nitrogen(TN),and applied an orthogonal experimental method to optimize four process parameters(packing layer thickness,flooding time,hydraulic load,and wet-to-dry ratio)for the optimal operation process.Our findings demonstrated that the optimal operational parameters for wastewater treatment were a packing thickness of 90 cm,a flooding time of 1 hour,a hydraulic loading rate of 80 L/m^(2)·d,and a wet-to-dry ratio of 1∶3.BOD_(5) and NH_(3)-N exhibited minimal sensitivity to each factor,with the fluctuation range of 95.68 to 98.37 and 94.49 to 97.65 respectively.Therefore,there is no need to change processing parameters when the quality and quantity of wastewater vary.The primary influence factor for the degradation rate of TP was packing thickness,followed by the flooding time.Consequently,it is necessary to increase packing thickness or replace part of the packing and appropriately extend the flooding time when there is an increase in TP in wastewater.For both COD and TN,the wet-to-dry ratio of 1∶3 emerged as the primary influence factor on degradation rate.Under such circumstances,the shorter the flooding times,the better the TN removal rates.The longer the flooding times,the better the TN degradation rates.It is advisable to determine which polluta

关 键 词：化工桶清洗尾水 人工快渗系统 工艺优化 

分 类 号：X703[环境科学与工程—环境工程]