摘要
采用磁混凝处理黑臭水体。结果表明,聚合氯化铝(PAC)、聚丙烯酰胺(PAM)和磁种的优化投加量分别为70、1.5、1.5 mg/L,浊度、NH_(4)^(+)-N、TN、TP与COD的去除率分别为89.77%、9.02%、17.02%、50.45%与35.77%,COD的去除率比传统混凝提高了69.5%。废水中溶解性有机物(DOM)主要为蛋白质类、腐殖质类及微生物代谢产物(SMP),PAC水解产物的吸附和螯合作用是DOM去除的主要机理,且芳香性和共轭双键有机物去除效果较好。磁种投加显著提升SMP和腐殖质类DOM的去除,其关键作用是成为絮体形成的核心,提高絮体密实度、沉降性能、强度和再稳性能,显著强化混凝效果。
The magnetic coagulation was applied for black and odorous water treatment. The results showed that, the optimized dosages of polyaluminum chloride(PAC), polyacrylamide(PAM) and magnetic seeds were 70, 1.5, and 1.5 mg/L, respectively, and the remove rate of turbidity, NH_(4)^(+)-N, TN, TP,and COD were 89.77%, 9.02%, 17.02%, 50.45%, and 35.77%, respectively, the COD removal rate was 69.5% higher than that of conventional coagulation.Dissolved organic matter(DOM) in wastewater was mainly protein, humus and soluble microbial product(SMP), the adsorption and chelation of PAC hydrolysate were the main mechanism of DOM removal, and the removal effect of aromatic and conjugated double bond organic matter was better.The magnetic seed promoted the remove of SMP and humic substances DOM. Its key role was to become the core of floc formation, improved floc density, settling performance, strength and re-stabilization performance, and significantly strengthened the coagulation effect.
作者
康赛
李清雪
吴振军
张鹤清
郑利兵
魏源送
KANG Sai;LI Qingxue;WU Zhenjun;ZHANG Heqing;ZHENG Libing;WEI Yuansong(Department of Water Pollution Control Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;College of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056000,China;Huanneng Technology Co.,Ltd,Chengdu 610045,China;State Key Joint of Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2021年第10期24-28,32,共6页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2017ZX07102-002)
国家自然科学基金青年基金(51908539)
人因工程国家重点实验室2019预研基金(6142222190715)。
关键词
磁混凝
黑臭水体
溶解性有机物
紫外可见光谱
三维荧光光谱
magnetic coagulation
black and odorous water
dissolved organic matter
UV-Vis spectrum
3DEEM
