红薯渣和城市污泥混合发酵产酸强化污水脱氮除磷  

Sweet potato residue mixed sludge fermentation producing acid to enhance denitrification and phosphorus removal

作　　者：朱艳芳[1] 刘宏波[1] 马惠君[1] 田悦[1] 黄帅[1] 符波[1] 刘和[1] 

机构地区：[1]江南大学环境与土木工程学院,无锡214122

出　　处：《环境工程学报》2015年第2期687-691,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51208231);江苏省自然科学基金资助项目(BK2012121);江苏省环保厅资助项目(2012035)

摘　　要：投加红薯渣促进城市污泥厌氧发酵产酸量,并将所得有机酸应用到污水处理外加碳源,强化污水脱氮除磷效果。实验结果表明,红薯渣和城市污泥混合发酵产酸比单一污泥发酵效果更好,有机酸产量可提高3倍左右,且做补充碳源时品质好,发酵液中COD∶TN∶TP约为160∶1∶1.6。将混合发酵所得有机酸应用到污水脱氮除磷外加碳源,结果表明,混合发酵所得有机酸优于污泥热碱预处理碳源和乙酸钠,污水处理出水中平均COD、TN和TP分别为(32.1±1.45)、(4.8±0.52)和(0.7±0.18)mg/L,TN和TP去除率分别达到(87.2±1.20)%和(90.0±0.18)%。因此,红薯渣的投加,可以大大提高城市污泥发酵产酸效果,优化发酵液碳源的品质。Acid yield was enhanced by adding sweet potato residue into the sludge fermentation.The acid was used as a carbon source to enhance nitrogen and phosphorus removal.Sweet potato residue mixed sludge anaerobic fermentation improved the acid yield,which nearly three times higher than that of only sludge fermentation.The ratio of COD∶ TN∶ TP of fermented liquid was approximately 160 ∶ 1 ∶ 1.6.Mixed fermented liquid was added to enhance nitrogen and phosphorus removal as a supplementary carbon source.The results showed that the mixed fermentation liquid was better than the carbon source of sodium acetate and thermol-alkaline treated sludge.The average COD,TN and TP were(32.1 ± 1.45) mg/L,(4.8 ± 0.52) mg/L and(0.7 ± 0.18) mg/L when using fermented liquid as a supplementary carbon source,and the removal rates of TN and TP were(87.2± 1.20) % and(90.0 ± 0.18) %.Therefore,adding sweet potato residue can greatly improve the sludge fermentation to produce acid and optimize the quality of the fermentation liquid carbon source.

关 键 词：红薯渣 剩余污泥 厌氧发酵 碳源 脱氮 除磷 

分 类 号：X703[环境科学与工程—环境工程]