摘要
太湖B支流河水属于低浊、高藻、高铁锰、高色度和高CODMn水质,其中铁、锰主要以溶解态和胶体态(铁、锰化合物胶体)存在。胶体态铁、锰被有机物膜包裹,和溶解态铁、锰形成了高稳定性铁、锰,常规给水处理工艺对其难于去除。为此,在前期小试的基础上进行了高锰酸盐(PPC)预氧化强化去除该原水中稳定性铁、锰的生产性试验。结果表明,高锰酸盐预氧化工艺出水经混凝沉淀后对锰的平均去除率为99%(较2004年同期常规过滤对锰的去除率提高了42%);对铁的平均去除率为75%(高于2004年同期常规过滤的62%);2004年常规工艺对CODMn的平均去除率为27.8%,而在2005年同期,预氧化、混凝沉淀工艺对CODMn的去除率达43%。对于原水水质与B支流河水水质相近的水厂,采用PPC强化处理是保障其出水水质的有效措施。
The B tributary raw water of the Taihu Lake has properties of low turbidity, high algae, high amounts of iron and manganese, high color degree and CODMn. Also iron and manganese in the raw water exist in dissolved and colloid state. The colloid iron and manganese are coated by an organic film. Combining with the dissolved iron and manganese, the highly stable iron and manganese are formed and difficult to remove by conventional processes. Therefore, based on the prior bench-scale test, a full-scale test on the removal of highly stable Mn/Fe from the raw water by enhanced preoxidation with potassium permanganate composite （PPC） was carried out. The results show that the removal rates of stable iron, manganese and CODMn are 75% , 99% and 43% respectively after coagulation and sedimentation. In the previous year, 2004, the removal rates of these indexes were 62%, 57% and 27.8% , respectively. It can be concluded that the use of PPC preoxidation is an effective method to ensure water quality in waterworks whose raw water quality is similar to the B tributary raw water of the Taihu Lake.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第15期26-28,33,共4页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2002AA601120)
关键词
高锰酸盐
预氧化
太湖原水
铁
锰
PPC
preoxidation
raw water from Taihu Lake
iron
manganese
