四川环境2025，Vol.44Issue(1)：123-130,8.DOI:10.14034/j.cnki.schj.2025.01.018
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 Waste water of Chemical Barrel with Two-layer Constructed Rapid Infiltration System
林康 1邢涛 2佟洪金 2雍毅 2侯江 2孟旭 1林蕊1
作者信息
- 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
- 折叠
摘要
Abstract
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(BOD5),ammonia nitrogen(NH3-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/m2·d,and a wet-to-dry ratio of 1∶3.BOD5 and NH3-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 pollutant index(COD or TN)takes precedence before adjusting the optimal flooding time based real-time wastewater quality during operation.The outcomes of the study can serve as technical references for tail water treatment and real-time process optimization of specialized industries.关键词
化工桶清洗尾水/人工快渗系统/工艺优化Key words
Cleaning wastewater of chemical barrel/CRI system/process optimization分类
资源环境引用本文复制引用
林康,邢涛,佟洪金,雍毅,侯江,孟旭,林蕊..双层人工快渗处理化工桶清洗尾水工艺优化研究[J].四川环境,2025,44(1):123-130,8.
