环境工程学报2013，Vol.7Issue(8)：2919-2924,6.
混凝对二级出水中有机物分布特性的影响
Effect of coagulation on distribution properties of dissolved organic matters in secondary effluent
摘要
Abstract
Aiming at the advanced treatment of the secondary effluent,the optimal dosage of coagulant with ferric chloride (FeCl3) and polyaluminium chloride (PAC) as coagulant was determined in this study.On this basis,dissolved organic matter (DOM) was characterized by XAD resin separation technology and ultrafiltration membrane method,and the effect of coagulation on hydrophilic and hydrophobic characteristics,molecular weight distribution,specific ultraviolet absorbance (SUVA) and E4/E6 of DOM before and after coagulation was investigated.The results show that the effluent quality can meet the first class level A standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002) when the dosages of FeCl3 and PAC are 30 mg/L and 60 mg/L,respectively.Removal efficiency of unsaturated C—C double bonds and aromatic organics by FeCl3 is better than that by PAC.Comparatively,FeCl3 is more efficient on small molecular organics removal,while the removal rate of the big molecular organics of ＞ 100 000 by PAC is higher.Effect of coagulation process on hydrophobic matter removal is better than that on the hydrophilic ones.Besides,removal rate of acid organic matter by coagulation is higher than that of non-acid organic matter.关键词
二级出水/混凝/溶解性有机物/亲水性/疏水性/分子量分布/比紫外吸收值Key words
secondary effluent/ coagulation/ dissolved organic matter/ hydrophilic/ hydrophobic/ molecular weight distribution/ specific ultraviolet absorbance分类
资源环境引用本文复制引用
程丽华,王奇,韩婷,李璐瑶,毕学军,刘长青..混凝对二级出水中有机物分布特性的影响[J].环境工程学报,2013,7(8):2919-2924,6.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07203-004) （2012ZX07203-004）
国家自然科学基金资助项目(51078192) （51078192）
山东省自然科学基金资助项目(ZR2012EEL22) （ZR2012EEL22）
