Experimental study on effective treatment of fecal sewagebya novel functional septic tank strengthened by iron-based bio-carriers
ZHANG Chao1,2, LIU Ling-hua1
1. Department of Water Environment Research, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Based on the addition of iron-based bio-carrier, the function of septic tank was strengthened by the related physicochemical and biochemical reactions, achieving the advanced treatment of fecal sewage. The effect of dissolved oxygen (DO) and carbon to nitrogen ratio (C/N) on the removal of pollutants in the fecal sewage was investigated. Under the obtained optimal operation condition, the transformation mechanism of nitrogen was further explored. The results showed that average NH4+-N, TN, COD and TP removals of 90.74%, 85.81%, 92.65% and 95.78% were achieved, respectively, at the influent C/N ratio of 7.3~8.4 and optimal DO of 2.3~2.7mg/L in the aerobic iron-based bio-carriers pool. When reducing the influent C/N ratio from 3.3~4.2, the system could still maintain average NH4+-N, TN, COD and TP removals of 81.16%, 76.62%, 93.87%and 94.75%, respectively. Mechanism analysis indicated that the addition of iron-based bio-carriers markedly strengthened TN removal, COD degradation and TP immobilizationof thedeveloped septic tank. Analysis on nitrogen transformation confirmed that denitrification was enhanced by the internal electrolysis and denitrifying bacteria coupled denitrifying process, which reduced the organicconsumption during denitrification. the developed novel functional septic tank achieved efficient of TN and TP removal from the low-C/N fecal sewage.
张超, 刘玲花. 铁基质强化新型功能性化粪池高效处理黑水的试验[J]. 中国环境科学, 2020, 40(6): 2435-2444.
ZHANG Chao, LIU Ling-hua. Experimental study on effective treatment of fecal sewagebya novel functional septic tank strengthened by iron-based bio-carriers. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2435-2444.
王西琴,高伟,张远.基于控制单元的农村生活污水处理优化模型[J].中国环境科学, 2015,35(9):2835-2842. Wang Xi-qin, Gao Wei, Zhang Yuan.Optimization of rural domestic sewage treatment models [J].China E Nnvironmental Science, 2015,35(9):2835-2842.
[2]
Otterpohl R, Braun U, Oldenburg M.Innovative technologies for decentralized water,wastewater and biowaste management in urban and peri-urban areas [J].Water Science & Technology, 2002,48(11/12): 23-32.
[3]
马伟辉,陈洪斌,屈计宁.生活污水源分离、分质处理与资源化[J].中国沼气, 2008,26(4):16-20+46. Ma Wei-hui, Chen H ong-bin, Qu Ji-ning.Progress in domestic wastewater source separation, separated treatment and resourcization [J].China Biogas, 2008,26(4):16-20+46.
[4]
阮久丽,于凤,陈洪斌,等.生活污水分类收集处理的探讨[J].中国给水排水, 2010,(8):33-37. Ruan Jiu-li, Yu Feng, Chen Hong-bin, et al.Discussion on categorized collection and quality-based treatment of domestic sewage.[J].China Water & Wastewater, 2010,(8):33-37.
[5]
Luostarinen Sari-A, Rintala Jukka-A.Anaerobic on-site treatment of black water and dairy parlour wastewater in UASB-septic tanks at low temperatures [J].Water Research, 2005,39(2/3):436-448.
[6]
Halalsheh M, Sawajneh Z, M.Zu’bi, et al.Treatment of strong domestic sewage in a 96m3 UASB reactor operated at ambient temperatures: two-stage versus single-stage reactor [J].Bioresour Technol, 2005,96(5):577-585.
[7]
Hocaoglu S.Murat, Atasoy E, Baban A, et al.Nitrogen removal performance of intermit TENTly aerated membrane bioreactor treating black water [J].Environmental Technology, 2013,34(19):2717-2725.
[8]
Al-Shayah Mohammad, Mahmoud Nidal.Start-up of an UASB-septic tank for community on-site treatment of strong domestic sewage [J].Bioresource Technology, 2008,99(16):7758-7766.
[9]
Chen A C, Chang J S, Yang L, et al.Nitrogen removal from sewage by continuous flow SBR system with intermittent aeration [J].Environmental Technology Letters, 2001,22(5):553-559.
[10]
Graaff M.S-de, Zeeman G, Temmink H, et al.Long term partial nitritation of anaerobically treated black water and the emission of nitrous oxide [J].Water Research, 2010,44(7):2171-2178.
[11]
Luostarinen S, Rintala J.Anaerobic on-site treatment of kitchen waste in combination with black water in UASB-septic tanks at low temperatures [J].Bioresource Technology, 2007,98(9):1734-1740.
[12]
Vlaeminck S E, Terada A, Smets B F, et al.Nitrogen removal from digested black water by one-Stage partial nitritation and anammox [J].Environmental Science & Technology, 2009,43(13):5035-5041.
[13]
李德生,张超,邓时海,等.基于铁基质高效催化还原污水中硝酸盐氮的实验研究[J].化工学报, 2019,70(3):1065-1074. Li De-sheng, Zhang Chao, Deng Shi-hai, et al.Experimental study on effective nitrate removal from sewage by ZVI-based catalyzed reduction [J].CIESC Journal, 2019,70(3):1065-1074.
[14]
李德生.好氧低碳氮比污水氨氮直接脱氮生物载体载体及制备方法:中国, CN103145234A [P].2013-06-12. Li De-sheng.Biological particulate carrier and it’spreparation method directly disposing ammonia nitrogen from aerobic low carbon nitrogen ratio wastewater: China, 103145234A [P].2013-06-12.
[15]
张洋.化粪池污水的好氧颗粒污泥脱氮特性研究[D].武汉:华中科技大学, 2009. Zhang Yang.Study on the denitrification characteristics of aerobic granular sludge in cesspool sewage treatment [D].Wuhan:Huazhong University of Science and Technology, 2009.
[16]
国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社, 2002:258-284. The Environmental Protection Agency of State.The monitoring and analysis methods of wastewater [M].4th ed.Beijing: China Environmental science Press, 2002:258-284.
[17]
赵亚丽.洱海表层沉积物可溶性有机氮特征及其生物有效性研究[D].北京:中国环境科学研究院, 2013. Zhao Ya-li.Study on the characteristics and bioavailability of soluble organic nitrogen of surface sediments in Erhai Lack [D].Beijing: Chinese research academy of environmental sciences, 2013.
[18]
高瑶远,彭永臻,包鹏,等.低溶解氧环境下全程硝化活性污泥的特性[J].中国环境科学, 2017,37(5):1769-1774. Gao Yao-yuan, Peng Yong-zhen, Bao Peng.The characteristic of activated sludge in sludge in nitrifying low-DO reactor [J].China Environmental Science, 2017,37(5):1769-1774.
[19]
高春娣,王淑莹,彭永臻,等.DO对有机物降解速率及污泥沉降性能的影响[J].中国给水排水, 2001,17(5):12-15. Gao Chun-di, Wang Shu-yin, Peng Yong-zhen, et al.influence of DO on organic matter degradation rate and sludge setting property.[J].China Water & Wastewater, 2001,17(5):12-15.
[20]
Yang Xiao-yi, Interior microelectrolysis oxidation of polyester wastewater and its treatment technology [J].Journal of Hazardous Materials, 2009,169(1-3):480-485.
[21]
梅小乐.缺氧-好氧-膜生物反应器处理人粪尿工艺研究[D].北京:中国农业大学, 2005. Mei Xiao-le.Study on human excrements treatment process by Anoxic-Oxic-Membrane Bioreactor (A-O-MBR) [D].Beijing: China Agricultural University, 2005.
[22]
王晓莲,王淑莹,马勇,等.A2O工艺中反硝化除磷及过量曝气对生物除磷的影响[J].化工学报, 2005,56(8):1565-1570. Wang Xiao-lian, Wang Shu-ying, Ma Yong, et al.Anoxic biological phosphorus removal and effect of excessive aeration on biological phosphorus removal in A2O process [J].CIESC Journal, 2005,56(8): 1565-1570.
[23]
Hu Zhi-feng, Deng Shi-hai, et al.Combination with catalyzed Fe(0)-carbon microelectrolysis and activated carbon adsorption for advanced reclaimed water treatment: simultaneous nitrate and biorefractory organics removal [J].Environmental Science and Pollution Research, 2019,26(6):5693-5703.
[24]
王亚娥,冯娟娟,李杰.不同Fe(III)对活性污泥异化铁还原及除磷影响研究[J].中国环境科学, 2013,33(6):993-998. Wang Ya-e, Feng Juan-juan, Li Jie.Phosphorous removal using dissimilatory reduction of different Fe(III) in activated sludge [J].China Environmental Science, 2013,33(6):993-998.
[25]
邓时海.催化Fe-C内电解与生物耦合深度脱除污水厂尾水中氮的机制与技术[D].北京:北京交通大学, 2017. Deng Shi-hai.Mechanism and technology study on the advanced nitrogen removal of tail water from WWTP by the coupling process between catalyzed Fe-C micro-electrolysis and biological processes.[D].Beijing: Beijing Jiaotong University, 2017.
[26]
Deng Shi-hai, Li De-sheng, YANG Xue, et al.Iron [Fe(0)]-rich substrate based on iron-carbon micro-electrolysis for phosphorus adsorption in aqueous solutions [J].Chemosphere, 2017,168:1486-1493.
[27]
王慰,王淑莹,张琼,等.后置缺氧UCT分段进水工艺处理低C/N城市污水[J].中国环境科学, 2016,36(7):1997-2005. Wang Wei, Wang Shu-ying, Zhang Qiong, et al.Post-anoxic UCT step-feed process in treating municipal wastewater with low C/N ratio [J].China Environmental Science, 2016,36(7):1997-2005.
[28]
GB/18918-2002城镇污水处理厂污染物排放标准[S]. GB/18918-2002 Discharge standard of pollutants for municipal wastewater treatment plant [S].
[29]
高艳娇,刘元,张瑞烽.低C/N对MUCT工艺性能的影响[J].辽宁工业大学学报(自然科学版), 2010,30(1):41-43. Gao Yan-jiao, Liu Yuan, Zhang Rui-feng.Effects of low C/N on performances of MUCT process.[J].Journal of Liaoning University of Technology (Natural Science Edition), 2010,30(1):41-43.
[30]
侯红娟,王洪洋,周琪.进水COD浓度及C/N值对脱氮效果的影响[J].中国给水排水, 2005,(12):25-29. Hou Hong-juan,Wang Hong-xiang, Zhou Qi.Effect of influent COD concentration and C/N ratio on denitrification [J].China Water & Wastewater, 2005(12):25-29.
[31]
邓时海,李德生,卢阳阳,等.集成模块系统同步硝化反硝化处理低碳氮比污水的试验[J].中国环境科学, 2014,34(9):2259-2265. Deng Shi-hai, Li De-sheng, Lu Yang-yang, et al.Performance characteristics of simultaneous nitrification and denitrification(SND) for low carbon to nitrogen (C/N) ratio wastewater in an integrated device [J].China Environmental Science, 2014,34(9):2259-2265.
[32]
赵晶.复合菌同时去除有机物与氨氮及其影响因素研究[D].太原:太原理工大学, 2016. Zhao Jing.Degrading organics and ammonia-nitrogen simultaneously by compound bacteria and studying the influence factors [D].Taiyuan: Taiyuan University of Technology.
[33]
董全宇.木屑-硫磺填充床反硝化滤池强化污水深度脱氮处理研究[D].哈尔滨:哈尔滨工业大学, 2016. Dong Quan-yu, Study on enhanced depth denitrification of sewage by woodchip-sulfur packed bed denitrifying biofilter [D].Harbin: Harbin Institute of Technology, 2016.
[34]
Deng Shi-hai,Peng Shuai, Xie Bing-han, et al.Influence characteristics and mechanism of organic carbon on denitrification, N2O emission and NO2- accumulation in the iron [Fe(0)]-oxidizing supported autotrophic denitrification process [J].Chemical Engineering Journal 2020,393:124746.
[35]
Deng Shi-hai, Li De-sheng, Yang Xue, et al.Biological denitrification process based on the Fe(0)-carbon micro-electrolysis for simultaneous ammonia and nitrate removal from low organic carbon water under a microaerobic condition [J].Bioresource Technology 2016,219:677-686.
