渔业现代化2024，Vol.51Issue(3)：25-32,8.DOI:10.3969/j.issn.1007-9580.2024.03.004
罗非鱼养殖尾水絮凝去除效果研究
Study on the flocculation removal effect of tilapia farming effluent
摘要
Abstract
Tilapia farming effluent contains a large amount of suspended particles such as uneaten feed and feces,which are the main carriers of nitrogen and phosphorus nutrients.Discharging the effluent into surrounding water bodies can lead to eutrophication.The common effluent treatment methods currently have disadvantages such as large land occupation,high investment,and low efficiency,affecting widespread adoption.To address this issue,this paper explores useing the flocculation process to treat tilapia farming effluent,selecting four flocculants:polyferric sulfate,ferric chloride,chitosan,and magnesium carbonate.By comparing the removal effects on turbidity,total suspended solids(TSS),and chemical oxygen demand(COD),a suitable flocculant for effluent treatment is selected.The results show that polyferric sulfate outperforms the other three flocculants(ferric chloride,chitosan,and magnesium carbonate).With a dosage of 0.4 g/L,pH=8,and flocculation time of 15 minutes,polyferric sulfate achieved removal rates of 96.7%for turbidity,92.6%for TSS,and 95.1%for COD.Evaluation of the flocculated flocs revealed that the height of floc settling has a certain correlation with the turbidity removal rate,and the growth of the flocs is affected by nucleation.The zeta potential before and after effluent treatment suggests that polyferric sulfate purifies the effluent by disrupting the stable structure of suspended particles in the water.Therefore,polyferric sulfate can be selected as a flocculant in treating tilapia farming effluent.关键词
罗非鱼/养殖尾水/聚合硫酸铁/絮凝/尾水处理Key words
tilapia/farming tailwater/ferrous sulfate/flocculation/tailwater treatment分类
农业科技引用本文复制引用
程果锋,程翔宇,周宏亮,刘兴国,高小婷,刘士坤,宋志奇..罗非鱼养殖尾水絮凝去除效果研究[J].渔业现代化,2024,51(3):25-32,8.基金项目
海南省重点研发计划"罗非鱼池塘养殖尾水生态工程化处理技术研究与示范(ZDYF2021XDNY276)" （ZDYF2021XDNY276）
国家现代农业产业技术体系(CARS-46) （CARS-46）
