不同氨氮浓度对混凝-超滤组合工艺水质处理效果及膜通量的影响  

Organic matter removal and flux variation influenced by ammonia nitrogen in coagulation-ultrafiltration combined process

作　　者：林佳琪[1,2] 刘百仓[2,3] 郭劲松[1] 黄尔[3] 杨国洪[3] 张梦然[2] 刘彩虹[2] 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆400045 [2]四川大学建筑与环境学院,成都610065 [3]四川大学水力学与山区河流开发保护国家重点实验室,成都610065

出　　处：《环境工程学报》2013年第1期113-118,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51278317)

摘　　要：我国地表水源污染物中氨氮是普遍存在的,且难以处理,实验选择混凝-超滤组合工艺,腐殖酸为NOM的代表物,通过考察污染物中氨氮不同含量水平的变化,考察氨氮含量对出水水质、通量下降和污染类型这3个方面的影响。结果表明,在给定实验条件下,氨氮含量由0.1 mg/L增大至0.5 mg/L时,加快了污染物在膜表面的沉积,最终导致出水有机物含量降低。PVDF和PVC膜的TOC去除率分别提高17.31%和23.21%,UV254去除率分别提高2.78%和11.72%,膜组件通量分别下降了3.51%和10.17%。考察膜污染类型,发现氨氮促进了标准孔堵塞和滤饼层形成,同时削弱完全孔堵塞和中间孔堵塞。It is common that ammonia nitrogen exists in the surface water and it is difficult to treat. During the coagulation-uhrafiltration combined process, while the humic acid was chosen as the representative of NOM, effect of different ammonia nitrogen concentration on organic matter removal were studied, including treated water＇ s quality, flux decline and membrane＇ s blocking law. The results showed that after increasing the dose of ammonia from 0. 1 mg/L to O. 5 mg/L, electrostatic repulsion was reduced, which accelerated the deposition of contaminants on the membrane surface. Ammonia can eventually lead to the decrease of organic matter＇ s con- centration. The TOC removal rates of PVDF and PVC membrane increase by 17.31% and 23.21% , respectively and their UV254 removal rates increase by 2.78% and 11.72% , respectively. It makes the membrane flux decreasing more rapidly, and thus favors the formation of standard blocking and the cake layer, while reducing the complete blocking and intermediate blocking simultaneously.

关 键 词：氨氮 超滤 膜通量 污染类型 

分 类 号：X703.1[环境科学与工程—环境工程]