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Combined process of biofiltration and ozone oxidation as an advanced treatment process for wastewater reuse

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Frontiers of Environmental Science & Engineering 2015年第6期9卷 1076-1083页

作者： Xinwei li Hanchang SHI kuixiao li liang ZHANG School of Environment Tsinghua University Beijing 100084 China Beijing Drainage Group Co. Ltd. Beijing 100044 China

The effluent of a wastewater treatment plant was treated in a pilot plant for reclaimed water production through the denitrification biofilter （DNBF） process, ozonation （O3）, and biologic aerated filtration （BAF）. The combined process demonstrated good removal performance of conventional pollutants, including con- centrations of chemical oxygen demand （27.8 mg·L^-1） and total nitrogen （9.9 mg·L^-1） in the final effluent, which met the local discharge standards and water reuse purposes. Micropollutants （e.g., antibiotics and endocrine-disrupting chemicals） were also significantly removed during the proposed process. Ozonation exhibited high antibiotic removal efficiencies, especially for tetracycline （94%）. However, micropollutant removal efficiency was nega- tively affected by the nitrite produced by DNBF. Acute toxicity variations of the combined process were estimated by utilizing luminescent bacteria. Inhibition rate increased from 9% to 15% during ozonation. Carbonyl compound concentrations （e.g., aldehydes and ketones） also increased by 58% as by-products, which consequently increased toxicity. However, toxicity eventually became as low as that of the influent because the by-products were effectively removed by BAR The combined DNBF/O3/ BAF process is suitable for the advanced treatment of reclaimed water because it can thoroughly remove pollutants and toxicity.

关键词： wastewater treatment micropollutantremoval ozonation biofiltration toxicity

Molecular characterization of effluent organic matter in secondary effluent and reclaimed water:Comparison to natural organic matter in source water

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Journal of Environmental Sciences 2018年第1期30卷 140-146页

作者： Xin Wang Juan Wang kuixiao li Haifeng Zhang Min Yang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085China University of Chinese Academy of Sciences Beijing 100049China Beijing Drainage Group Co.Ltd. Beifin9 100084China

Municipal wastewater reclamation is becoming of increasing importance in the world to solve the problem of water scarcity. A better understanding of the molecular composition of effluent organic matter（Ef OM） in the treated effluents of municipal wastewater treatment plants（WWTPs） is crucial for ensuring the safety of water reuse. In this study, the molecular composition of Ef OM in the secondary effluent of a WWTP in Beijing and the reclaimed water further treated with a coagulation–sedimentation–ozonation process were characterized using a non-target Fourier transform ion cyclotron resonance mass spectrometry（FT-ICR MS） method and compared to that of natural organic matter（NOM） in the local source water from a reservoir. It was found that the molecular composition of Ef OM in the secondary effluent and reclaimed water was dominated by CHOS formulas, while NOM in the source water was dominated by CHO formulas. The CHO formulas of the three samples had similar origins. Anthropogenic surfactants were responsible for the CHOS formulas in Ef OM of the secondary effluent and were not well removed by the coagulation-sedimentation-ozonation treatment process adopted.

关键词： Secondary effluent Reclaimed water Source water Effluent organic matter Natural organic matter FT-ICR MS

Occurrence and fate of antibiotics in advanced wastewater treatment facilities and receiving rivers in Beijing, ChinaOccurrence and fate of antibiotics in advanced wastewater treatment facilities and receiving rivers in Beijing, China

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Frontiers of Environmental Science & Engineering 2014年第6期8卷 888-894页

作者： Xinwei li Hanchang SHI kuixiao li liang ZHANG Yiping GAN School of Environment Tsinghua University Beijing 100084 China Beijing Drainage Group Co. Ltd. Beijing 100044 China

The occurrence and removal of 13 antibiotics were investigated in five wastewater treatment plants （WWTPs） with advanced wastewater treatment processes in Beijing, China. Most of the target antibiotics were detected in the secondary and tertiary effluents, with the concentrations of 4.8-1106.0 and 0.3-505.0ng·L^-1. Fluoroquinolone antibiotics showed relatively high concentrations in all samples （782-1814ng·L^-1）. Different tertiary treatment processes showed discrepant antibiotics removal performances. Ozonation process was found more effective in removing target antibiotics compared to the coagulation-flocculation-sedimentation process and sand filtration process. Investigation of the target antibiotics in three typical urban rivers in Beijing was carried out to understand antibiotics occurrence in surface water environment. Eight antibiotics were detected in the studied rivers, with highest concentration of antibiotics in the fiver which was mainly replenished by reclaimed water. This study showed the necessity of employing more effective advanced treatment facilities to further reduce the discharge amount of antibiotics.

关键词： antibiotics advanced treatment urban river reclaimed water

Formation potentials of typical disinfection byproducts and changes of genotoxicity for chlorinated tertiary effluent pretreated by ozone

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Journal of Environmental Sciences 2009年第4期21卷 409-413页

作者： CAO Nan MIAO Tingting li kuixiao ZHANG Yu YANG Min State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Material Science and Technology Institute Beijing Forestry University Beijing 100083 China

The effects of ozonation on the formation potential of typical disinfection byproducts （DBPs） and the changes of genotoxicity during post chlorination of tertiary effluent from a sewage treatment plant were investigated. Ozonation enhanced the yields of all detected chlorine DBPs except CHCI3. At a chlorine dose of 5 mg/L, the three brominated THMs and five HAAs increased, while chloroform decreased with the increase of ozone dose from 0 to 10 mg/L （ozone dose in consumption base）. At a chlorine dose of 10 mg/L, the two mixed bromochloro species THMs and two dominant HAAs （DCAA and TCAA） increased firstly and then decreased with the increase of ozone dose, with the turning point approximately occurring at an ozone dose of 5 mg/L. The genotoxicity detected using umu test, on the other hand, was removed from 7 Ixg 4-NQO/L to a negligible level by ozonation under an ozone dose of 5 mg/L. Chlorination could further remove the genotoxicity to some extent. It was found that SUVA （UV absorbance divided by DOC concentration） might be used as an indicative parameter for monitoring the removal of genotoxicity during the oxidation.

关键词： wastewater reclamation ozonation chlorination disinfection byproducts genotoxicity

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臭氧-生物活性焦工艺对二级出水净化效果

哈尔滨工业大学学报 2022年第8期54卷 27-33页

作者：王赛时玉龙李魁晓许骐王刚魏凡钦郑晓英北京市水质科学与水环境恢复工程重点实验室(北京工业大学) 北京100124 北京城市排水集团有限责任公司北京100022 环境模拟与污染控制国家重点联合实验室(清华大学) 北京100084

为进一步探索再生水水质安全性保障技术,搭建臭氧氧化-生物活性焦过滤中试系统(O_(3)-BACK),考察其对城市污水处理厂二级出水有机污染物、病原菌的去除效果,以及对发光菌综合生物毒性的影响。结果表明,活性焦滤柱由吸附饱和向生物活性... 详细信息

为进一步探索再生水水质安全性保障技术,搭建臭氧氧化-生物活性焦过滤中试系统(O_(3)-BACK),考察其对城市污水处理厂二级出水有机污染物、病原菌的去除效果,以及对发光菌综合生物毒性的影响。结果表明,活性焦滤柱由吸附饱和向生物活性焦发展的过程可分为3个阶段。较BACK单独过滤,O_(3)前处理单元的引入,使后续BACK滤柱稳定期对COD_(Cr)的平均去除量与去除率分别提升了20.81%和28.35%。BACK滤柱出水COD_(Cr)、UV_(254)、色度、浊度分别维持在12.74 mg/L、0.04 cm^(-1)、2度、0.75 NTU附近。O_(3)氧化对腐殖质、芳香族蛋白质类荧光组分和微量有机污染物均有较好的去除效果。除全氟辛酸外,BACK出水中磺胺甲恶唑等11种微量有机物质量浓度均降至10 ng/L以下。O_(3)对粪大肠菌群(FC)有近2log的灭活,BACK出水FC浓度为31~504 MPN/L,满足观赏性景观环境用水FC<1000 L^(-1)的要求(GB/T 18921—2019)。O_(3)氧化出水发光菌发光强度抑制率(IR)有所上升,均值为11%,而经BACK滤柱后的最终出水IR值始终为负值,无生物毒性。O_(3)-BACK在有效削减污染物的同时,很好地保障了再生水的水质安全性,为污水再生与安全利用提供了可靠的技术选项。

关键词：二级出水臭氧氧化生物活性焦过滤微量有机污染物发光细菌发光强度抑制率

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反硝化生物滤池同化除磷性能研究

给水排水 2022年第1期48卷 33-38页

作者：赵楠王慰王润芳张璐刘健阜崴李魁晓北京北排水环境发展有限公司北京100124 北京城市排水集团有限责任公司北京100044 北京市污水资源化工程技术研究中心北京100124

针对再生水厂实际运行中出现的反硝化生物滤池对总磷(TP)有去除的现象,通过试验研究了在实际工程运行条件下反硝化生物滤池的除磷效能、除磷原理以及进水磷浓度对脱氮效能的影响。结果表明,反硝化生物滤池对溶解性总磷(SP)的去除主要由... 详细信息

针对再生水厂实际运行中出现的反硝化生物滤池对总磷(TP)有去除的现象,通过试验研究了在实际工程运行条件下反硝化生物滤池的除磷效能、除磷原理以及进水磷浓度对脱氮效能的影响。结果表明,反硝化生物滤池对溶解性总磷(SP)的去除主要由生物膜中微生物的同化作用完成,在进水SP浓度为0.1~0.5 mg/L时,其去除量与进水浓度大致呈线性关系,去除率约为40%。对颗粒性磷(PP)的去除主要依靠对悬浮物的物理截留及吸附作用,悬浮物中PP的占比约为2.4%。当进水TP浓度从0.24 mg/L升高到0.59 mg/L时,反硝化生物滤池的除磷效能由微生物摄入磷的量及微生物的增长量共同决定;当进水TP浓度从0.59 mg/L升高到1.12 mg/L时,生物滤池的除磷效能主要由滤池微生物的增长量决定。滤池反冲洗对除磷效果有负面影响。进水总磷浓度在1 mg/L以下时对反硝化生物滤池脱氮效能无明显影响。

关键词：反硝化生物滤池同化除磷磷形态微生物增长量

城市污水处理厂二级处理出水中磷深度去除技术

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环境工程学报 2019年第8期13卷 1839-1846页

作者：郑晓英李楠邱丽佳李魁晓北京工业大学北京市水质科学与水环境恢复工程重点实验室北京100124 北京城市排水集团有限责任公司科技研发中心北京100022 北京市污水资源化工程技术研究中心北京100124

以某城市污水处理厂二级出水为研究对象,分析了其中磷的形态及浓度分布,分别采用FeCl3、PAC、Al2(SO4)3混凝剂和羟基铁颗粒吸附剂开展了基于化学法和吸附法的深度除磷技术的研究。在相同的水质和环境条件下,对不同形态磷的去除效果进行... 详细信息

以某城市污水处理厂二级出水为研究对象,分析了其中磷的形态及浓度分布,分别采用FeCl3、PAC、Al2(SO4)3混凝剂和羟基铁颗粒吸附剂开展了基于化学法和吸附法的深度除磷技术的研究。在相同的水质和环境条件下,对不同形态磷的去除效果进行了分析,并对两者的技术经济性进行了对比。结果表明,该厂二级出水中TP浓度的平均水平为0.332 mg·L-1,其中可溶性活性磷酸盐为主要存在形态,占TP浓度的64.16%。与FeCl3相比,Al2(SO4)3和PAC比较适合本实验原水水质,当其投加量为3 mg·L-1时,出水TP可降至0.05mg·L-1以下。以Al2(SO4)3和PAC作为混凝剂,各种形态的磷均得到不同程度的去除,可溶性活性磷酸盐的去除效果最好,几乎全部得以去除,而颗粒态磷和其他溶解性磷的去除效果较差。通过技术经济比较,Al2(SO4)3在除磷效果和药剂费用上均比PAC占有优势。羟基铁颗粒吸附剂对可溶性活性磷酸盐吸附效果显著,对其他溶解性磷吸附效果较差,当空床接触时间(EBCT)大于10 min时,出水TP可降至0.05 mg·L-1以下。从长期的技术和经济效益综合考虑,吸附剂优于混凝剂。

关键词：二级出水磷形态化学沉淀吸附法深度除磷

碳源对反硝化生物滤池运行及微生物种群的影响

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环境工程学报 2018年第5期12卷 1434-1442页

作者：郑晓英乔露露王慰李楠李魁晓北京工业大学北京市水质科学与水环境恢复工程重点实验室北京100124 北京城市排水集团有限责任公司科技研发中心北京100022

以某城市污水厂二级出水为原水,以甲醇、乙酸钠为碳源,研究了不同碳源对反硝化生物滤池运行的影响,并借助16S rDNA测序技术对滤池生物膜的微生物群落组成和结构进行了解析。结果表明,采用逐渐增加滤速的方式进行挂膜,乙酸钠滤池在启动7 ... 详细信息

以某城市污水厂二级出水为原水,以甲醇、乙酸钠为碳源,研究了不同碳源对反硝化生物滤池运行的影响,并借助16S rDNA测序技术对滤池生物膜的微生物群落组成和结构进行了解析。结果表明,采用逐渐增加滤速的方式进行挂膜,乙酸钠滤池在启动7 d后出水水质稳定,NO_3^--N去除率在96%以上,NO_2^--N积累消失;甲醇滤池则需要9 d。稳定运行期,甲醇和乙酸钠滤池达到最大反硝化效率所需碳氮比均为4.5~5.5,出水TN<1.0 mg·L^(-1)。乙酸钠滤池沿过滤方向硝酸盐氮降解较快。与甲醇相比,乙酸钠微生物产量高、运行周期短、反冲洗时间长,且药剂投加量高。从滤池脱氮效率、运行稳定性和成本等方面综合考虑,甲醇可作为最佳碳源。微生物在属水平进行聚类分析结果表明,以甲醇、乙酸钠为碳源的反硝化生物滤池中的微生物种群存在差异。甲醇滤池中与反硝化有关的属占36.68%,其中优势菌属Methylophilus,属于嗜甲基型菌属。乙酸钠滤池中与反硝化有关的菌属占58.38%。其优势菌属为Arobacter,可利用有机酸还原硝酸盐。

关键词：脱氮反硝化滤池甲醇乙酸钠 16S rDNA 微生物群落

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MBR出水氯、紫外、臭氧单独与组合消毒

环境工程学报 2014年第11期8卷 4681-4686页

作者：李鑫玮李魁晓郑晓英王俭龙北京城市排水集团有限责任公司科技研发中心北京100024 北京工业大学水质科学与水环境恢复工程北京市重点实验室北京100124

采用氯、紫外和臭氧单独与2种组合工艺对MBR工艺中试出水进行了消毒实验,研究了不同消毒方式对指示性微生物的去除效果以及消毒副产物三卤甲烷(THMs)生成量随有效氯投加量的变化。结果表明,组合工艺消毒效果明显优于单独消毒效果,紫外... 详细信息

采用氯、紫外和臭氧单独与2种组合工艺对MBR工艺中试出水进行了消毒实验,研究了不同消毒方式对指示性微生物的去除效果以及消毒副产物三卤甲烷(THMs)生成量随有效氯投加量的变化。结果表明,组合工艺消毒效果明显优于单独消毒效果,紫外剂量为25 mJ/cm2与有效氯投加量为3 mg/L的紫外与氯组合、臭氧投加量为6 mg/L与有效氯投加量为4 mg/L的臭氧与氯组合2种工艺消毒后出水中的总大肠菌群指标均满足《污水再生利用城市杂用水水质》(GB/T 18920-2002)的要求。THMs生成量随着有效氯投加量的增加而增加。相对紫外与氯组合消毒,臭氧与氯组合消毒可以大幅度降低THMs生成量,有效氯投加量为4 mg/L时,THMs生成浓度为14.11μg/L,比氯单独消毒过程降低了37.19%。

关键词：氯紫外臭氧三卤甲烷