Farmland irrigation of city sewage treated by aerobic granular sludge
Yan Ailan1, Qi Yiting1, Zheng Zhijin2
1.Institute of Hydraulic & Environmental Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou, Zhejiang 310018, China; 2.Huzhou Daxi Town Agricultural Service Center, Huzhou, Zhejiang 313023, China
Abstract：The irrigation possibility of city sewage treated by aerobic granular sludge was explored. Results show that after the sewage was treated by aerobic granular sludge, the removal rates of CODcr and BOD5 in its effluents were 60% and 55% respectively; the removal rates of nitrogen and phosphorus were 50% and 53% separately;the removal rate of heavy metal was very high. The content of cadmium in the effluents was less than 1.0?10-5 mg/L. The Farmland Irrigation Water Quality Standard, whose value is less than 0.006 mg/L. Pb content in the effluents is 0.02 mg/L, less than the standard value of 0.1 mg/L. And the contents of other heavy metals, such as zinc, copper, mercury, chromium in the effluents were also much lower than the content values in the standard. So, the effluents of city sewage treated by aerobic granular sludge could be applied to farmland irrigation, and the indexes of CODCr,BOD5 nitregen,phosphorus,and other heavy metals in the effluents fully meet the requirements of the standard of the Farmland Irrigation Water Quality.
[1]黄玉源,黄益宗,李秋霞,等.广州市污水灌溉对菜地土壤和蔬菜的影响[J].环境化学,2005,24(6):731-732. Huang Yuyuan, Huang Yizong, Li Qiuxia, et al.The impact of Guangzhou city sewage irrigation on vegetable soil and vegetables[J]. Environmental Chemistry, 2005,24(6):731-732.(in Chinese)[2]严爱兰,郑知金,戚毅婷. 农村生活污水一级处理水灌溉对青菜生长品质影响[J]. 排灌机械工程学报, 2015, 33(4): 352-355. Yan Ailan,Zheng Zhijin,Qi Yiting. Effect on cabbage quality with rural sewage primary treatment water irrigation[J]. Journal of Drainage and Irrigation Machinery Engineering, 2015, 33(4): 352-355.(in Chinese)[3]迟寒,刘毅慧,杨凤林,等.好氧颗粒污泥处理城市生活污水[J].水处理技术, 2006,32(8): 73-77. Chi Han,Liu Yihui,Yang Fenglin,et al. Treatment of municipal domestic sewage with aerobic granular sludge[J]. Technology of Water Treatment,2006,32(8): 73-77.(in Chinese)[4]竺建荣,刘纯新. 好氧颗粒污泥的培养及理化特征[J]. 环境科学,1999,20(2):38-41. Zhu Jianrong,Liu Chunxin.Cultivation and physic-chemical characteristics of granular activated sludge in alternation of anaerobic/aerobic process[J].Environmental Science, 1999,20(2):38-41.(in Chinese)[5]周延年,韦甦,姚新卫,等.工业园区废水好氧颗粒污泥的培养[J].工业水处理,2010,30(5):30-32. Zhou Yannian,Wei Su,Yao Xinwei,et al. Cultivation of aerobic granular sludge with the wastewater from industrial park[J]. Industrial Water Treatment, 2010,30(5):30-32.(in Chinese)[6]饶彤彤,王立,李军,等.不同流态对好氧污泥颗粒化的影响 [J].中国给水排水,2011,27(15): 88-90. Rao Tongtong,Wang Li,Li Jun,et al. Effect of different flow patterns on aerobic sludge granulation[J]. China Water & Wastewater,2011,27(15):88-90.(in Chinese)[7]国家环境保护局. 水和废水监测分析方法[M]. 3版.北京:中国环境科学出版社,1997.[8]卢然超,张晓建,张悦,等. SBR 工艺污泥颗粒化对生物脱氮除磷特性的研究[J].环境科学学报,2001,21(5):99-104. Lu Ranchao,Zhang Xiaojian,Zhang Yue,et al.Effect of the sludge granulation on nitrogen and phosphorus removalin SBR process[J]. Acta Scientiae Circumstantiae, 2001,21(5):99-104.(in Chinese)[9]高景峰,陈冉妮, 苏凯,等. 好氧颗粒污泥同时脱氮除磷实时控制的研究[J].中国环境科学,2010,30(2): 180-185. Gao Jingfeng, Chen Ranni, Su Kai,et al. Real time control of simultaneous nitrogen and phosphorus removal by aerobic granular sludge[J].China Environmental Science,2010,30(2): 180-185.(in Chinese)[10]汪善全, 张胜, 李晓娜,等.高浓度Vc 生产废水培养好氧颗粒污泥的试验研究[J].环境科学学报,2007,28(10):2244-2248. Wang Shanquan, Zhang Sheng, Li Xiaona,et al.Experimental investigation of aerobic granule cultivation in high strength Vc wastewater[J]. Environment Science, 2007,28(10):2244-2248.(in Chinese)[11]马晓,李军,韦甦. 不同接种污泥对好氧污泥颗粒化的影响[J].中国给水排水,2010,26(21):36-42. Ma Xiao,Li Jun, Wei Su. Influence of different seed sludge on aerobic sludge granulation[J]. China Water and Wastewater, 2010,26(21):36-42.(in Chinese)[12]Liu Y Q,Tay J H. Influence of starvation time on formation and stability of aerobic granules in sequencing batch reactors[J].Bioresour Technol,2008,99(5):980-985.[13]Liu Yu,Yang Shufang,Tan S F,et al.Biosorption kine-tics of Cadmium(Ⅱ)on aerobic granular sludge [J]. Process Biochemistry,2003,38(7):997-1001.[14]Lodi A,Solisoio C,Converti A,et al. Caduim,Zinc,Copper,Silver and Chromium(Ⅲ)removal from wastewaters by Sphaerotilus natans [J]. Bioproc Eng,1998,19(3):197-203.[15]Liu Yu,Yang Shufang,Tan S F,et al. Aerobic granules: A novel zinc biosorbent [J]. Letters in Applied Microbiology,2002,35(6):548-551.
