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Ecological Risk Management of Drinking Water Project: The Case Study of Kunming City

Ji-liang Zheng,Jun Hu,Xuan Zhou,Ching Yuen Luk

《工程管理前沿（英文）》 2015年第2卷第3期页码 311-319 doi: 10.15302/J-FEM-2015045

摘要： Following rapid infrastructure development and industrialization, the problems of water pollution and water shortage have become more severe. Whether there is safe drinking water in cities has attracted wide attention. The ecological risk management of drinking water project is an important means of ensuring the safety of a drinking water source. Based on ecological risk assessment and management theories, this paper establishes an ecological risk management model and assessment system with the aim of providing theoretical guidance and scientific basis for formulating a policy on the safety and protection of drinking water sources in a city. Kunming is one of the cities plagued by severe water shortage in China. Its ecological risk management of drinking water has attracted the attention of both the local government and the public. Using Kunming as the case study, this paper conducts a comparative analysis and assessment on three major reservoirs that face ecological risks. It highlights the existing problems and gives helpful suggestions.

关键词： drinking water project ecological risk ecological risk assessment risk management

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Nanofiltration for drinking water treatment: a review

《化学科学与工程前沿（英文）》 2022年第16卷第5期页码 681-698 doi: 10.1007/s11705-021-2103-5

摘要： In recent decades, nanofiltration (NF) is considered as a promising separation technique to produce drinking water from different types of water source. In this paper, we comprehensively reviewed the progress of NF-based drinking water treatment, through summarizing the development of materials/fabrication and applications of NF membranes in various scenarios including surface water treatment, groundwater treatment, water reuse, brackish water treatment, and point of use applications. We not only summarized the removal of target major pollutants (e.g., hardness, pathogen, and natural organic matter), but also paid attention to the removal of micropollutants of major concern (e.g., disinfection byproducts, per- and polyfluoroalkyl substances, and arsenic). We highlighted that, for different applications, fit-for-purpose design is needed to improve the separation capability for target compounds of NF membranes in addition to their removal of salts. Outlook and perspectives on membrane fouling control, chlorine resistance, integrity, and selectivity are also discussed to provide potential insights for future development of high-efficiency NF membranes for stable and reliable drinking water treatment.

关键词： nanofiltration drinking water disinfection byproducts micropollutants selectivity

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Emergency drinking water treatment in source water pollution incident-technology and practice in China

Xiaojian ZHANG , Chao CHEN ,

《环境科学与工程前沿（英文）》 2009年第3卷第3期页码 364-368 doi: 10.1007/s11783-009-0027-2

摘要： An investigation into emergency potable water treatment technologies was conducted to investigate China’s water pollution situation. In order to confirm optimum parameters, the technological efficiency of each pollutant was obtained. About 100 contaminants were tested to find the emergency treatment technologies, most of which were found to be positive. This paper presents the three largest and most significant water pollution incidents in China to date, analyzing cases such as the nitrobenzene pollution incident in the Songhua River in November 2005, the cadmium pollution incident in the Beijiang River in December 2005, and the water crisis with odorous tap water in Wuxi City in May 2007.

关键词： emergency drinking water treatment water pollution adsorption oxidation precipitation

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What have we known so far about microplastics in drinking water treatment? A timely review

《环境科学与工程前沿（英文）》 2022年第16卷第5期 doi: 10.1007/s11783-021-1492-5

摘要：

• 23 available research articles on MPs in drinking water treatment are reviewed.

关键词： Microplastics Drinking water treatment Coagulation Flocculation Membrane Filtration

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Potential shift of bacterial community structure and corrosion-related bacteria in drinking water distributionpipeline driven by water source switching

Yue Hu, Ding Dong, Kun Wan, Chao Chen, Xin Yu, Huirong Lin

《环境科学与工程前沿（英文）》 2021年第15卷第2期 doi: 10.1007/s11783-020-1320-3

摘要： Abstract • Bacterial release from aged pipe sections under extreme conditions was quantified. • Released bacterial community structure exhibited large variation after transition. • Risks from transition reduced significantly with cleaner source. As a result of pollution in the present water sources, cities have been forced to utilize cleaner water sources. There are few reports regarding the potential shift of bacterial community structure driven by water source switching, especially that of corrosion-related bacteria. Three types of finished water were used for simulation, the polluted source water from the Qiantang and Dongtiaoxi Rivers (China) was replaced by cleaner water from Qiandao Lake (China). Here, we discussed the transition effects through three simulated reactors. The bacterial characteristics were identified using the high-throughput sequencing and heterotrophic plate count method. It was observed that the level of culturable bacteria declined by 2–3 orders of magnitude after water source switching. The bacterial community released from the pipeline reactor was significantly different under different finished water, and it exhibited large variation at the genus level. Porphyrobacter (58.2%) and Phreatobacter (14.5%) clearly replaced Novosphingobium, Aquabacterium, and Cupriavidus as new dominant genera in system A, which could be attributed to the lower carbon and nitrogen content of the new water source. Although corrosion-inhibiting bacteria decreased after switching, they still maintained dominant in three reactors (6.6%, 15.9%, and 19.7%). Furthermore, potential opportunistic pathogens such as Sphingomonas were detected. Our study shows that after transition to a high quality water source, the total culturable bacteria released was in a downtrend, which leads to a great reduction in the risk of bacterial leakage in the produced drinking water.

关键词： Drinking water biosafety Water source switching Drinking water distribution system Transition effects High-throughput sequencing

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Seasonal and treatment-process variations in invertebrates in drinking water treatment plants

Zhiling Wu, Xianchun Tang, Hongbin Chen

《环境科学与工程前沿（英文）》 2021年第15卷第4期 doi: 10.1007/s11783-020-1354-6

摘要： Abstract • Seasonal and treatment-process variations in invertebrates in a DWTP were analyzed. • The propagation and leakage of invertebrates in BAC filter were the most serious. • Invertebrates can survive and reproduce in chlorine disinfected clear water tanks. • Proportions of endogenous invertebrates increased along the treatment process. Problems associated with excessive propagation and leakage of invertebrates in drinking water have received increasing attention in recent years. We performed a monthly survey of invertebrate abundance and taxa in the effluent of each treatment stage in a drinking water treatment plant between May 2015 and April 2016 and analyzed seasonal and treatment-process variations in invertebrates. The results showed that invertebrate abundances in raw water, effluent of the biological activated carbon (BAC) filter, and finished water significantly correlated with water temperature, whereas no correlation was observed between water temperature and invertebrate abundance in the effluents of the sedimentation tank and sand filter. The dominant taxa in the effluent of each treatment stage were rotifers, nematodes, and crustaceans. The sedimentation tank could efficiently remove invertebrates with an annual average removal rate of 92%. The propagation and leakage of invertebrates occurred in the sand and BAC filters but more seriously in the latter. The average reproduction rate in the BAC filter was 268.8% with rotifers as the taxon that leaked the most. Invertebrate survival and reproduction were also observed in the chlorine-disinfected clean water reservoir with an average reproduction rate of 41.9%. Owing to differences in chlorine resistance, the reproduction ability of the dominant taxa was in the order nematodes>crustaceans>rotifers. The proportion of endogenous invertebrates gradually increased along the treatment process. The average proportion of endogenous invertebrates in the finished water was higher than 79.0%. Our findings suggested that waterworks should pay more attention to endogenous invertebrate growth.

关键词： Invertebrates Drinking water Seasonal variations Treatment process

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Comparative genotoxicity of water processed by three drinking water treatment plants with different water

Ting Zhang, Heze Liu, Yiyuan Zhang, Wenjun Sun, Xiuwei Ao

《环境科学与工程前沿（英文）》 2020年第14卷第3期 doi: 10.1007/s11783-020-1214-4

摘要： Genotoxicity of substances is unknown in the water after treatment processes. Genotoxicity decreased by activated carbon treatment but increased by chlorination. Halogenated hydrocarbons and aromatic compounds contribute to genotoxicity. Genotoxicity was assessed by umu test; acute and chronic toxicity by ECOSAR. Inconsistent results confirmed that genotoxicity cannot be assessed by ECOSAR. Advanced water treatment is commonly used to remove micropollutants such as pesticides, endocrine disrupting chemicals, and disinfection byproducts in modern drinking water treatment plants. However, little attention has been paid to the changes in the genotoxicity of substances remaining in the water following the different water treatment processes. In this study, samples were collected from three drinking water treatment plants with different treatment processes. The treated water from each process was analyzed and compared for genotoxicity and the formation of organic compounds. The genotoxicity was evaluated by an umu test, and the acute and chronic toxicity was analyzed through Ecological Structure- Activity Relationship (ECOSAR). The results of the umu test indicated that biological activated carbon reduced the genotoxicity by 38%, 77%, and 46% in the three drinking water treatment plants, respectively, while chlorination increased the genotoxicity. Gas chromatograph-mass spectrometry analysis revealed that halogenated hydrocarbons and aromatic compounds were major contributors to genotoxicity. The results of ECOSAR were not consistent with those of the umu test. Therefore, we conclude that genotoxicity cannot be determined using ECOSAR .

关键词： Drinking water Treatment process Genotoxicity Umu test Ecological Structure-Activity Relationship

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dissemination and removal of antibiotic resistant bacteria and antibiotic resistance genes in urban drinkingwater system: A review

Qiaowen Tan, Weiying Li, Junpeng Zhang, Wei Zhou, Jiping Chen, Yue Li, Jie Ma

《环境科学与工程前沿（英文）》 2019年第13卷第3期 doi: 10.1007/s11783-019-1120-9

摘要：

Reviewed the change of ARGs and ARB in full-scale urban drinking water systems.

Conventional processes are more promising than BAC process in ARGs removal.

Mechanisms of ARGs enrichment and spread in BAC filter and DWDSs are discussed.

Raise the need of future research on ARGs and ARB change in building plumbing systems.

关键词： Antibiotic resistant bacteria Antibiotic resistance genes Water source Drinking water treatment plant Drinking water distribution system Urban drinking water system

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Molecular analysis of bacterial community in the tap water with different water ages of a drinking water

Feng Wang, Weiying Li, Yue Li, Junpeng Zhang, Jiping Chen, Wei Zhang, Xuan Wu

《环境科学与工程前沿（英文）》 2018年第12卷第3期 doi: 10.1007/s11783-018-1020-4

摘要： Bacterial community in the drinking water distribution system (DWDS) was regulated by multiple environmental factors, many of which varied as a function of water age. In this study, four water samples with different water ages, including finished water (FW, 0 d) and tap water (TW) [TW1 (1 d), TW2(2 d) and TW3(3 d)], were collected along with the mains of a practical DWDS, and the bacterial community was investigated by high-throughput sequencing technique. Results indicated that the residual chlorine declined with the increase of water age, accompanied by the increase of dissolved organic matter, total bacteria counts and bacterial diversity (Shannon). For bacterial community composition, although Proteobacteria phylum (84.12%-97.6%) and Alphaproteobacteria class (67.42%-93.09%) kept dominate, an evident regular was observed at the order level. In detail, the relative abundance of most of other residual orders increased with different degrees from the start to the end of the DWDS, while a downward trend was uniquely observed in terms of Rhizobiales, who was inferred to be chlorine-resistant and be helpful for inhibiting pipes corrosion. Moreover, some OTUs were found to be closely related with species possessing pathogenicity and chlorine-resistant ability, so it was recommended that the use of agents other than chlorine or agents that can act synergically with chlorine should be developed for drinking water disinfection. This paper revealed bacterial community variations along the mains of the DWDS and the result was helpful for understanding bacterial ecology in the DWDS.

关键词： Bacterial community Water age High-throughput sequencing technique Drinking water distribution system

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Applying chemical sedimentation process in drinking water treatment plant to address the emergent arsenicspills in water sources

Pengfei LIN,Xiaojian ZHANG,Hongwei YANG,Yong LI,Chao CHEN

《环境科学与工程前沿（英文）》 2015年第9卷第1期页码 50-57 doi: 10.1007/s11783-014-0733-2

摘要： Arsenic (As) spills occurred more frequently and sometimes polluted water sources in recent years in China. It is as urgent need to develop emergency treatment technologies to address the arsenic threat for large-scale water treatment plants. In response, we developed a chemical sedimentation technology to remove arsenic contaminants for water treatment plants. Bench-scale experiments were conducted to investigate the efficiency of arsenic removal and the influencing factors of the chemical sedimentation treatment process. The influencing factors included the choice and dosage of coagulants, the valence of arsenic and pH value of solution. The As(V) contaminants can be almost completely removed by ferric or alum coagulants. The As(III) contaminants are more recalcitrant to chemical sedimentation, 75% for ferric coagulant and 40% for alum coagulant. The quantitative results of arsenic removal load by different ferric or alum coagulants were presented to help determine the parameters for arsenic treatment technology. The dominant mechanism for arsenic removal is static combination, or adsorption of negative arsenic species onto positive ferric hydroxide or alum hydroxide flocs. The efficiency of this treatment technology has also been demonstrated by a real production test in one water treatment plant with arsenic-rich source water and one emergency response. This technology was verified to be quick to set-up, easy to operate and highly efficient even for high concentration of arsenic.

关键词： Arsenic spill chemical sedimentation coagulation drinking water emergency treatment

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Biofiltration and disinfection codetermine the bacterial antibiotic resistome in drinking water: A review

Kun Wan, Wenfang Lin, Shuai Zhu, Shenghua Zhang, Xin Yu

《环境科学与工程前沿（英文）》 2020年第14卷第1期 doi: 10.1007/s11783-019-1189-1

摘要： Published data was used to analyze the fate of ARGs in water treatment. Biomass removal leads to the reduction in absolute abundance of ARGs. Mechanism that filter biofilm maintain ARB/ARGs was summarized. Potential BAR risks caused by biofiltration and chlorination were proposed. The bacterial antibiotic resistome (BAR) is one of the most serious contemporary medical challenges. The BAR problem in drinking water is receiving growing attention. In this study, we focused on the distribution, changes, and health risks of the BAR throughout the drinking water treatment system. We extracted the antibiotic resistance gene (ARG) data from recent publications and analyzed ARG profiles based on diversity, absolute abundance, and relative abundance. The absolute abundance of ARG was found to decrease with water treatment processes and was positively correlated with the abundance of 16S rRNA (r2 = 0.963, p<0.001), indicating that the reduction of ARG concentration was accompanied by decreasing biomass. Among treatment processes, biofiltration and chlorination were discovered to play important roles in shaping the bacterial antibiotic resistome. Chlorination exhibited positive effects in controlling the diversity of ARG, while biofiltration, especially granular activated carbon filtration, increased the diversity of ARG. Both biofiltration and chlorination altered the structure of the resistome by affecting relative ARG abundance. In addition, we analyzed the mechanism behind the impact of biofiltration and chlorination on the bacterial antibiotic resistome. By intercepting influent ARG-carrying bacteria, biofilters can enrich various ARGs and maintain ARGs in biofilm. Chlorination further selects bacteria co-resistant to chlorine and antibiotics. Finally, we proposed the BAR health risks caused by biofiltration and chlorination in water treatment. To reduce potential BAR risk in drinking water, membrane filtration technology and water boiling are recommended at the point of use.

关键词： Drinking water treatment Antibiotic resistance gene Biofiltration Chlorination

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Disinfection byproducts in drinking water and regulatory compliance: A critical review

Xiaomao WANG,Yuqin MAO,Shun TANG,Hongwei YANG,Yuefeng F. XIE

《环境科学与工程前沿（英文）》 2015年第9卷第1期页码 3-15 doi: 10.1007/s11783-014-0734-1

摘要： Disinfection by-products (DBPs) are regulated in drinking water in a number of countries. This critical review focuses on the issues associated with DBP regulatory compliance, including methods for DBP analysis, occurrence levels, the regulation comparison among various countries, DBP compliance strategies, and emerging DBPs. The regulation comparison between China and the United States (US) indicated that the DBP regulations in China are more stringent based on the number of regulated compounds and maximum levels. The comparison assessment using the Information Collection Rule (ICR) database indicated that the compliance rate of 500 large US water plants under the China regulations is much lower than that under the US regulations (e.g. 62.2% versus 89.6% for total trihalomethanes). Precursor removal and alternative disinfectants are common practices for DBP regulatory compliance. DBP removal after formation, including air stripping for trihalomethane removal and biodegradation for haloacetic acid removal, have gained more acceptance in DBP control. Formation of emerging DBPs, including iodinated DBPs and nitrogenous DBPs, is one of unintended consequences of precursor removal and alternative disinfection. At much lower levels than carbonaceous DBPs, however, emerging DBPs have posed higher health risks.

关键词： Disinfection byproducts (DBPs) drinking water standards regulatory compliance alternative disinfection information collection rule (ICR) emerging DBPs

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Effects of humic acid on residual Al control in drinking water treatment plants with orthophosphate addition

Wendong WANG, Hua LI, Zhenzhen DING, Xiaochang WANG, Rui LIU

《环境科学与工程前沿（英文）》 2012年第6卷第4期页码 470-476 doi: 10.1007/s11783-012-0422-y

摘要： This study aimed to investigate the effects of humic acid (HA) on residual Al control in drinking water facilities that used orthophosphate addition. The results showed that adding orthophosphate was an effective method for residual Al control for the raw water without HA. When orthophosphate was added at 1.0 min before the addition of poly aluminum chloride (PACl), the concentrations of soluble aluminum (Sol-Al) and total aluminum (Tot-Al) residue were 0.08 and 0.086 mg·L , respectively; both were reduced by 46% compared with the control experiment. The presence of HA would notably increase the residual Al concentration. For the raw water with 5 mg·L of HA, the concentrations of Sol-Al and Tot-Al increased from 0.136 and 0.174 mg·L to 0.172 and 0.272 mg·L , respectively. For water with a HA concentration above 5 mg·L , orthophosphate was ineffective in the control of residual Al, though there were still parts of orthophosphate were removed in coagulation. The amounts of Al removal were positively correlated with the solids freshly formed in coagulation. Similar to the raw water without HA, the best Al control was obtained with orthophosphate salt added at 1.0 min before PACl. HA concentrations in the raw water, solution pH, and the orthophosphate dosage suitable for residual Al control by orthophosphate precipitation were also investigated.

关键词： coagulation drinking water humic acid orthophosphate residual Al

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Occurrence of odor problems in drinking water of major cities across China

SUN Daolin,YU Jianwei,YANG Min,AN Wei,ZHAO Yunyun,LU Ning,YUAN Shengguang,ZHANG Dongqing

《环境科学与工程前沿（英文）》 2014年第8卷第3期页码 411-416 doi: 10.1007/s11783-013-0577-1

摘要： A comprehensive investigation into the occurrence of odor problem at 111 drinking water treatment plants (DWTPs) in major cities across China was undertaken using both flavor profile analysis (FPA) and gas chromatography–mass spectrometry (GC-MS). Eighty percent of source water samples exhibited odor problems, characterized by earthy/musty (41%) and swampy/septic (36%) odors, while the occurrence rate was lower (45%) in the finished water. Source water from rivers exhibited more pollution-origin odors, such as the swampy/septic odor, while that from lakes and reservoirs exhibited more algae-origin odors, such as earthy/musty odors. The occurrence rate of 2-methylisoborneol (2-MIB) in the surface source water samples was 75%, with 7% of samples containing 2-MIB concentrations of over 10 ng·L . The earthy/musty odor in the lake/reservoir water samples was mainly caused by 2-MIB (linear regression coefficient, =0.69), while the correlation between 2-MIB concentration and the earthy/musty odor intensity in the river-source water samples was weak ( =0.35). These results will be useful for the management of odor-quality problems in drinking water of China.

关键词： flavor profile analysis 2-methylisoborneol swampy/septic odor earthy/musty odor drinking water quality

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脱贫地区农村饮用水安全保障战略研究

吉庆华,董硕勋,曹晓峰,刘会娟,曲久辉

《中国工程科学》 2021年第23卷第5期页码 163-168 doi: 10.15302/J-SSCAE-2021.05.021

摘要：

保障农村饮用水安全是落实脱贫地区“两不愁、三保障”的基本内容，开展脱贫地区农村饮用水安全保障战略研究对于巩固脱贫攻坚成果、有效衔接乡村振兴战略具有重要意义。本文研究了脱贫地区农村饮用水安全现状与存在的问题，分析了脱贫地区农村饮用水安全保障的风险成因，提出了保障脱贫地区农村饮用水安全的战略目标以及包括工程技术保障、政策保障、机制保障3 个方面的战略路径，并针对性地提出了对策建议。为进一步巩固脱贫地区农村饮用水安全保障成果，研究建议，要保持脱贫地区农村饮用水安全保障政策的稳定性和连续性；优化农村饮用水卫生标准，推进城乡饮水“同网、同质、同价”；建立以水价为重点的农村供水工程的长效运维管理机制。

关键词：农村饮用水，脱贫地区，饮用水卫生标准，水价

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标题作者时间类型操作

Ecological Risk Management of Drinking Water Project: The Case Study of Kunming City

Ji-liang Zheng,Jun Hu,Xuan Zhou,Ching Yuen Luk

期刊论文

Nanofiltration for drinking water treatment: a review

期刊论文

Emergency drinking water treatment in source water pollution incident-technology and practice in China

Xiaojian ZHANG , Chao CHEN ,

期刊论文

What have we known so far about microplastics in drinking water treatment? A timely review

期刊论文

Potential shift of bacterial community structure and corrosion-related bacteria in drinking water distributionpipeline driven by water source switching

Yue Hu, Ding Dong, Kun Wan, Chao Chen, Xin Yu, Huirong Lin

期刊论文

Seasonal and treatment-process variations in invertebrates in drinking water treatment plants

Zhiling Wu, Xianchun Tang, Hongbin Chen

期刊论文

Comparative genotoxicity of water processed by three drinking water treatment plants with different water

Ting Zhang, Heze Liu, Yiyuan Zhang, Wenjun Sun, Xiuwei Ao

期刊论文

dissemination and removal of antibiotic resistant bacteria and antibiotic resistance genes in urban drinkingwater system: A review

Qiaowen Tan, Weiying Li, Junpeng Zhang, Wei Zhou, Jiping Chen, Yue Li, Jie Ma

期刊论文

Molecular analysis of bacterial community in the tap water with different water ages of a drinking water

Feng Wang, Weiying Li, Yue Li, Junpeng Zhang, Jiping Chen, Wei Zhang, Xuan Wu

期刊论文

Applying chemical sedimentation process in drinking water treatment plant to address the emergent arsenicspills in water sources

Pengfei LIN,Xiaojian ZHANG,Hongwei YANG,Yong LI,Chao CHEN

期刊论文

Biofiltration and disinfection codetermine the bacterial antibiotic resistome in drinking water: A review

Kun Wan, Wenfang Lin, Shuai Zhu, Shenghua Zhang, Xin Yu

期刊论文

Disinfection byproducts in drinking water and regulatory compliance: A critical review

Xiaomao WANG,Yuqin MAO,Shun TANG,Hongwei YANG,Yuefeng F. XIE

期刊论文

Effects of humic acid on residual Al control in drinking water treatment plants with orthophosphate addition

Wendong WANG, Hua LI, Zhenzhen DING, Xiaochang WANG, Rui LIU

期刊论文

Occurrence of odor problems in drinking water of major cities across China

SUN Daolin,YU Jianwei,YANG Min,AN Wei,ZHAO Yunyun,LU Ning,YUAN Shengguang,ZHANG Dongqing

期刊论文

脱贫地区农村饮用水安全保障战略研究

吉庆华,董硕勋,曹晓峰,刘会娟,曲久辉

期刊论文

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