摘要
通过中试试验考察了高锰酸盐复合药剂(PPC)预氧化强化混凝/沉淀/超滤的组合工艺的除藻效能以及PPC预氧化对藻类引起的膜污染的缓解作用,并对其机理进行了探讨.试验结果表明,投加0.6mg·L-1PPC能使预处理阶段对藻类的平均去除率提高约28%.组合工艺处理高藻水时,PPC预氧化通过强化预处理,降低膜表面的污染负荷,对藻源污染物引起可逆和不可逆污染均具有一定的缓解作用.化学清洗试验结果表明,碱洗对超滤膜TMP恢复效果远远强于酸洗,因而有机物是超滤膜处理高藻水时的主要污染物质.
An integrated process of preoxidation,coagulation,sedimentation and ultrafiltration was used to treat algae-rich water and evaluate its algae removal efficiency in pilot experiments. The mitigation and mechanism of membrane fouling by preoxidation with potassium permanganate composites （PPC） is discussed. The results showed that the average algae removal rate increased about 28% with preoxidation at a PPC dosage of 0.6 mg·L^-1. When treating algae-rich water with the integrated process,PPC preoxidation could enhance the performance of the pretreatment and control reversible and irreversible membrane fouling by reducing the foulant load on the membrane. The experiment results of chemical cleaning showed that the recovery of transmembrane pressure in alkaline cleaning was much greater than that in acidic cleaning,which indicated that the main foulants on the membrane in the ultrafiltration of algae-rich water were organics.
出处
《环境科学学报》
CAS
CSCD
北大核心
2010年第7期1366-1371,共6页
Acta Scientiae Circumstantiae
基金
国家科技重大专项"水体污染控制与治理"资助项目(No.2008ZX07422-005)
国家自然科学基金资助项目(No.50808051)
国家科技支撑计划项目(No.2006BAJ08B06)
城市水资源与水环境国家重点实验室项目(No.HIT.2008DX04)~~
关键词
超滤膜
膜污染
高锰酸盐复合药剂
高藻水
ultrafiltration
membrane fouling
potassium permanganate composites（PPC）
algae-rich water
作者简介
瞿芳术（1984-），男，博士研究生，E-mail：qufangshu@163．com；
通讯作者（责任作者）
