pH值对高氨氮废水亚硝化/反亚硝化速率的影响  

Effect of pH Value on Nitrosation/Denitrosation Rate for Wastewater Containing High Ammonia Nitrogen

作　　者：方士[1] 李筱焕 

机构地区：[1]浙江大学环境工程系,浙江杭州310029 [2]浙江省冶金环保研究所,浙江杭州310013

出　　处：《高校化学工程学报》2001年第4期346-350,共5页Journal of Chemical Engineering of Chinese Universities

摘　　要：用两段SBR法处理经稀释的味精废水的过程可分为碳氧化阶段和三个亚硝化/反亚硝化阶段。PH值与废水中的游离氨(FA)和游离亚硝酸(FNA)的浓度相关，是影响脱氮的重要因素。PH值越高，越有利于碳氧化阶段氨氮吹脱效果；亚硝化阶段I、II、III的最佳pH值分别为6.8、8.2、8.2；反亚硝化阶段I、II、III的最佳pH值分别为7.5、8.2、8.2。It was proved that the denitrification process of N-rich MG wastewater treatment using two stage SBR was composed by a carbon oxygenation process and three stages nitrosation/denitrosation process. The pH level correlated with the free ammonia (FA) and free nitrous acid (FNA) was the primary factor for the denitrification process. To determine the optimum pH level for each process or stage, four pH values were selected, which were 6.8±0.2, 7.5±0.2, 8.2±0.2 and 8.8±0.2. Experiments showed that during the carbon oxygenation stage, the higher the pH value, the batter the stripping effect, and during the three stages of nitrosation process I, II and III, the optimum pH values were 6.8, 8.2and 8.2 respectively, while the nitrosation rates for the three nitrosation stage, I, II and III were 4.2, 10.4 and 2.27 mg NO2--N·(gMLSS·h)-1 respectively. For the three stage s of the denitrosation process I, II and III, the optimum pH values were 7.5, 8.2 and 8.2 respectively, while the denitrosation rates for the three denitrosation stages I, II and III were 3.53, 8.17 and 7.32 mg NO2--N·(gMLSS·h)-1 respectively.

关 键 词：亚硝化 反亚硝化 PH值 两段SBR法 味精废水 废水处理 反应速率 生物脱氮 

分 类 号：X792.031[环境科学与工程—环境工程]