Feasibility Study on the Treatment of Wastewater Containing High-concentration Hg by Coagulation Sedimentation-Adsorption

• 作者: Fu Wei Li Kuixiao Zhao Lijun
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: COAGULATION SEDIMENTATION ADSORPTION Wastewater CONTAINING HG FLOCCULANT Activated carbon China
• 年，卷（期）: qxyhjyjywb_2016,（5）
• 页码范围: 59-61
• 页数: 3页
• 分类号: P

摘要

For the wastewater containing high-concentration Hg, the feasibility of high-concentration Hg in wastewater treated by coagulation sedimentation,adsorption and the combined process was studied. Research results showed that if using the single coagulation sedimentation process,when FeS04 - 7H20 dosage was 1.39 g/L , and NaOH dosage was 0.40 g/L , it could meet discharge requirement, but the reagent cost was 13.1yuan/t, which was high. Because that there was subsequent adsorption process, it was selected 0.28 g /L of FeS04 .7H20 and 0.36 g /L ofNaOH, and the estimated reagent cost was 2.62 yuan/t. In selection process of adsorption materials, powdered activated carbon, granular activated carbon and diatomite all could effectively adsorb Hg, and the technology was feasible. When using the combined process of coagulation sedimentation+adsorption to treat the wastewater containing high-concentration Hg (800 ug /L ) , removal rate could reach 99%, and operation cost was 2.71 yuan. It could meet the requirement of sewage discharged into sewer(20 ug/L) at the technology, and was acceptable at the economy.Therefore, treatment of wastewater containing high-concentration Hg by the combined process was feasible at the aspects of technology and economy.