Feasibility Study on the Treatment of Wastewater Containing High-concentration Hg by Coagulation Sedimentation-Adsorption
Feasibility Study on the Treatment of Wastewater Containing High-concentration Hg by Coagulation Sedimentation-Adsorption作者机构：Beijing Drainage Group Co . Ltd. Beijing 100124 China Beijing Beipai Science and Technology Co . Ltd. Beijing 100124 China Beijing Research Center of Sewage Resource Utilization Engineering Technology Beijing 100124 China
出 版 物：《Meteorological and Environmental Research》 (气象与环境研究（英文版）)
年 卷 期：2016年第7卷第5期
页 面：59-61页
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学]
主 题：Coagulation sedimentation Adsorption Wastewater containing Hg Flocculant Activated carbon China
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 FeSO_4·7H_2O 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 FeSO_4·7H_2O and 0. 36 g / L of NaOH,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 μg / L),removal rate could reach 99%,and operation cost was 2. 71 yuan. It could meet the requirement of sewage discharged into sewer( 20 μg / L) at the technology,and was acceptable at the ***,treatment of wastewater containing high-concentration Hg by the combined process was feasible at the aspects of technology and economy.
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