Article
Engineering, Environmental
Guoqiang Liu, Xianwei Wu, Deyong Li, Lugao Jiang, Ju Huang, Li Zhuang
Summary: The study showed that short-term low dissolved oxygen increased N2O emissions, while long-term low DO decreased emissions by increasing the abundance of ammonia oxidizers in the ASP. Long-term low DO reduced AOB abundance but increased AOA, with AOA potentially inhibiting N2O production. The positive correlation between N2O emissions and nitrite concentration became insignificant after 80 days of low DO operation, suggesting that ASPs can reduce N2O production and CO2 emissions by operating with low DO and extended sludge age.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Agricultural Engineering
Shuang Qiu, Lingfeng Wang, Zhipeng Chen, Mingzhu Yang, Ziwei Yu, Shijian Ge
Summary: The study demonstrated that an integrated mainstream aeration and sidestream sludge treatment was effective in overcoming the adaptation of nitrite oxidizing bacteria (NOB) in an anoxic/oxic process, by utilizing alternating aeration with step feeding to address variations in nitritation. Key factors contributing to stable effluent nitrite accumulation and nitrogen removal included using aerobic sludge for FNA/FA treatment and ensuring timely denitritation and constant anoxic disturbance with ALASF.arseilleAlgiersSan FranciscoMálagaAmsterdamTorontoSanta CruzOuagadougouSydneyYangonRiyadhTokyoKinshasaSeoulBaghdadAlgiersMinskCape TownViennaStockholmUlaanbaatarBrusselsNashvilleBeijingAbu DhabiMogadishuHo Chi Minh CityBrusselsLos AngelesAlgiersMogadishuCairoSydneyRomeRio de JaneiroBaghdadMarrakeshMinskBeirutJerusalemHanoiOuagadougouNew York CityCasablancaRio de JaneiroTehranChicagoKinshasaHavanaSantiagoTehranSana'aLimaAlgiersKyotoBamakoParisKyivSão ToméAntananarivoSydneyJacksonvillePyongyangIstanbulAstanaKhartoumRabatPort-au-PrinceLuxembourg CitySevilleTaipeiVenicePort MoresbyJakartaShenzhenRiyadhLoméManaguaLilongweFort-de-FranceViennaLos AngelesColumbusVallettaCaracasSeoulLilongwePort MoresbyAthensAnkaraRigaMinskBanjulMonroviaAlmatyTripoliLimaMunichCotonouConakryLusakaKhartoumSuvaAnkaraDamascusSuvaSaint-DenisSaint-DenisCape TownBamakoYamoussoukroNairobiTehranMunichTel AvivCairoCape TownNew DelhiKanoOsloKhartoumBernIslamabadJakartaRomeBelmopanSuvaMinskDakarSkopjeKhartoumSuvaBandar Seri BegawanSaint-DenisChefchaouenKathmanduBrusselsSaint-DenisKigaliJubaKhartoumGaboroneLisbonNiameyColomboSofiaBamakoSaint-DenisTaipeiLisbonMuscatLuandaChiang MaiWashington, D.C.MadridKabulGibraltarBujumburaBerlinHavanaSaint-DenisSaint-DenisTunisMaputoSaint-DenisDar es SalaamBamakoAlmatyAbujaHanoiDohaDiliPodgoricaKingstownMuscatNew DelhiSingaporeNuukJubaBrazzavilleLuxembourg CityBissauDushanbeBernMalaboGeorgetownTel AvivReykjavíkMaseruJakartaAshgabatGibraltarAmmanRiyadhHoniaraBerlinKororBrusselsBakuFort-de-FranceAshgabatAnkaraBuenos AiresLa PazKampalaLobambaTbilisiSão ToméBridgetownLjubljanaTbilisiSaint-DenisBelmopanTallinnTiranaSaint-DenisTashkentSão ToméPort MoresbyPodgoricaMinskThimphuLilongweBamakoHavanaWindhoekSan JoséLos AngelesBrazzavilleBratislavaRiyadhAshgabatConakryAnkaraAbujaSukhumiSaint-DenisLjubljanaDoualaAshgabatAmmanDushanbeSukhumiBamakoSukhumiKigaliNouakchottBangkokJubaSaint-DenisRoseauAstanaBamakoBamakoBudapestSaint-DenisAnkaraAnkaraAstanaTallinnTunisCotonouSaint-DenisYerevanSaint-DenisSaint-DenisWashington, D.C.DakarBaghdadTiranaOuagadougouKathmanduKhartoumBamakoMaputoKigaliNovosibirskDamascusPorto-NovoTripoliTbilisiSukhumiButareRoseauCampo GrandeNairobiKabulMontevideoKingstownDakarSarajevoAbujaPort MoresbyPraiaLilongweBangkokSão ToméAshgabatMaputoKingstownNdjamenaBanjulOuagadougouMaputoBerlinSaint-DenisNoumeaMuscatAmmanBamakoBelmopanTbilisiIslas MalvinasPort MoresbyDublinAshgabatBandar Seri BegawanGazaSaint-DenisPort MoresbySaint-DenisBamakoKampalaKinshasaSaint-DenisMalaboSaint-DenisSaint-DenisBrusselsBridgetownBlantyreNdjamenaKingstownKigaliAshgabatBeijingBaghdadSaint-DenisSaint-DenisDamascusBaghdadNiameySaint-DenisMuscatBamakoBangkokRiyadhBlantyreBujumburaLilongweNouakchottPort MoresbySaint-DenisMaputoPodgoricaSão ToméSaint-DenisAvaruaKampalaSaint-DenisSaint-DenisHanoiRiyadhRomeSaint-DenisBridgetownSaint-DenisSaint-DenisRangoonDushanbeNouakchottSaint-DenisSaint-DenisBaghdadAmmanBangkokBelmopanTunisSaint-DenisLilongweMalaboSaint-DenisAntananarivoRiyadhBandar Seri BegawanMaseruMilanIslamabadMasqatAshgabatPodgoricaMaseruTashkentPort MoresbyPodgoricaSaint-DenisSaint-DenisBangkokSaint-DenisBerlinLilongweIslamabadDamascusSaint-DenisWindhoekBridgetownLilongweBamakoBrasíliaSaint-DenisPodgoricaLisbonPodgoricaKigaliSaint-DenisBamakoPodgoricaBamakoPodgoricaMaleSaint-DenisSaint-DenisKingstownSaint-DenisReykjavíkBandar Seri BegawanBujumburaAshgabatLjubljanaDushanbeSaint-DenisMangilaoMuscatSaint-DenisBamakoKigaliSaint-DenisBridgetownSaint-DenisSaint-DenisLondonBelmopanAsmaraNdjamenaKampalaDushanbeDublinSaint-DenisSaint-DenisRiyadhAshgabatBrusselsGibraltarDushanbeSaint-DenisLilongweSaint-DenisBridgetownDushanbeSaint-DenisPodgoricaAmmanSaint-Den
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Xia Jia, Yunfeng Gao, Xiaodi Li, Yonghua Zhao, Lu Wang, Chunyan Zhang
Summary: This study investigated the impacts of elevated CO2 and cadmium levels on soil nitrification in the rhizosphere of Robinia pseudoacacia L. seedlings. The results showed that elevated CO2 combined with Cd pollution generally stimulated nitrification enzyme activities and influenced bacterial community structures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Min Zheng, Zhiyao Wang, Jia Meng, Zhetai Hu, Yanchen Liu, Zhiguo Yuan, Shihu Hu
Summary: Recent studies have shown that free nitrous acid (FNA) has biocidal effects on nitrite-oxidizing bacteria (NOB), significantly reducing active NOB concentration. The Weibull model can accurately describe the biocidal effect of FNA, facilitating the optimization of FNA conditions. However, long-term implementation of FNA-based technology may lead to issues of NOB adaptation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Dongdan Yuan, Lei Zheng, Yong-Xin Liu, Hongguang Cheng, Aizhong Ding, Xiaomin Wang, Qiuyang Tan, Xue Wang, Yuzi Xing, En Xie, Haoming Wu, Shanyun Wang, Guibing Zhu
Summary: Through the use of double tracer technique and metagenomic sequencing, we found that the production of N2O in plateau wetlands is promoted by nitrifier denitrification, with the key functional genes belonging to comammox bacteria Nitrospira nitrificans. The comammox bacterial species N. nitrificans and ammonia oxidizing bacterial species Nitrosomonas europaea cooperate to produce N2O in plateau wetland sediments. Environmental factors such as elevation and total organic matter influence the cooperation pattern via N. nitrificans, thus affecting N2O production activity in plateau wetland sediments.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Ecology
Xiaoping Fan, Hao Chen, Guochao Yan, Mujun Ye, Chang Yin, Tingqiang Li, Steven A. Wakelin, Yongchao Liang
Summary: This study investigated the efficacy of nitrification inhibitors (NIs) and their effects on soil microbiota in different arable soils. The results showed that NI application suppressed the abundance of ammonia-oxidizing bacteria and increased the abundance of nosZI-N2O reducers. The efficacy of different NIs varied in different soils.
Article
Agricultural Engineering
Xiaodan Gu, Wenhui Huang, Yiyi Xie, Yong Huang, Miao Zhang
Summary: This study investigated the feasibility of partial nitrification with intermittent aeration strategy and explored the key controlling factor for NOB activity inhibition under alternating aerobic/anoxic conditions.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Zhen Lei, Lianxu Wang, Jun Wang, Shuming Yang, Zhaoyang Hou, Xiaochang C. Wang, Rong Chen
Summary: This study demonstrates that operating at higher dissolved oxygen concentrations can effectively improve the performance of the partial nitritation reactor, enhancing ammonia oxidation and reducing nitrite accumulation simultaneously.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Haochuan Chen, Zhenguo Chen, Songwei Zhou, Yongxing Chen, Xiaojun Wang
Summary: This study achieved stable partial nitritation-denitritation (PN) by using a zeolite biological fixed bed (ZBFB) reactor for the treatment of synthetic wastewater and printed circuit board (PCB) tail wastewater. The continuous desorption of ammonium from the zeolite inhibited free ammonia (FA), leading to stable and efficient nitrite accumulation. The results demonstrated the feasibility of using ZBFB for real wastewater treatment and promoted the development of energy-saving anammox process in industrial wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Mingzhu Yang, Shuang Qiu, Lingfeng Wang, Zhipeng Chen, Yanbing Hu, Jianhua Guo, Shijian Ge
Summary: This study investigated the effects of light irradiation on the activities and physiological characteristics of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge. The results showed that moderate light irradiation could enhance the activity of ammonia-oxidizing bacteria, while excessive light could inhibit the activities of both types of bacteria. These findings contribute to our understanding of the physiological responses of nitrifiers to short-term light irradiation and have implications for the development of sustainable wastewater treatment technologies.
Article
Engineering, Environmental
Bingbing Ma, Xiaojing Zhang, Aihua Gao, Chuang Ma, Yulin Hou, Zirui Zhao, Hao Hu
Summary: The CANON process was utilized for treating composting wastewater, resulting in decreased ammonia levels and increased total nitrogen removal rate. Microorganisms secreted more extracellular polymeric substances to counteract cell damage caused by harmful substances, maintaining system stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Ahmed Elsayed, Jaecheul Yu, Taeho Lee, Younggy Kim
Summary: This study proposed a real-time aeration scheme based on nitrite concentration to control the competition between nitrite oxidizing bacteria (XNOB) and Anammox bacteria (XANA) in single-stage Anammox processes. The simulation results showed that maintaining dissolved oxygen (DO) at around 0.10 mg-O2/L was ideal for effective nitrite creation by ammonia oxidizing bacteria (XAOB) while slowing down the growth of XNOB. Nitrite concentration was found to be the rate-limiting parameter for efficient nitrogen removal in single-stage Anammox processes.
ENVIRONMENTAL RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Dorota Szypulska, Stanislaw Miodonski, Kamil Janiak, Mateusz Muszynski-Huhajlo, Bartosz Zieba, Grzegorz Cema
Summary: The study found that higher concentrations of FNA than previously reported can release more organic matter, which may be beneficial for wastewater treatment plants. The demand for organic compounds for denitrification may constitute up to 86% of total released SCOD and must be considered. Moreover, increasing FNA concentrations above 6.4 mgHNO(2)-N/L did not benefit the growth of SBMP anymore.
Article
Environmental Sciences
Shishi He, Zhirong Zhao, Zhichao Tian, Chi Xu, Yuan Liu, Da He, Yinghui Zhang, Maosheng Zheng
Summary: This study analyzed activated sludge samples from municipal and industrial wastewater treatment plants and found that comammox bacteria were more abundant than ammonia-oxidizing bacteria and ammonia-oxidizing archaea in municipal plants, while this trend did not hold true for industrial plants. Furthermore, a higher diversity of comammox bacteria was found in municipal samples. This study provides important insights into the abundance and diversity of comammox bacteria in municipal and refinery wastewater treatment systems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biodiversity Conservation
Weifang Hu, Mianrun Chen, Xue Lan, Guoliang Li, Bin Wang, Dong Yao Sun, Xianbiao Lin
Summary: This study found significant shifts in potential ammonia oxidation rates (PARs) and gene abundances of ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) along different salinity gradients. The PARs were higher under high salinity conditions, and the AOB gene abundance was greater than AOA under moderate and high salinity. This has important implications for nitrogen cycling in estuarine sediments.
ECOLOGICAL INDICATORS
(2022)
Article
Engineering, Environmental
Mengxiong Wu, Chun -Yu Lai, Yulu Wang, Zhiguo Yuan, Jianhua Guo
Summary: Nitrate contamination is a common problem in water environments and poses health risks. This study investigates the feasibility of using propane and butane as electron donors for nitrate reduction. The results showed that propane and butane could continuously remove nitrate under oxygen-limiting conditions, and certain microorganisms were responsible for the oxidation of these gases and the reduction of nitrate.
Article
Engineering, Environmental
Min Zheng, Huijuan Li, Haoran Duan, Tao Liu, Zhiyao Wang, Jing Zhao, Zhetai Hu, Shane Watts, Jia Meng, Peng Liu, Maxime Rattier, Eloise Larsen, Jianhua Guo, Jason Dwyer, Ben Van Den Akker, James Lloyd, Shihu Hu, Zhiguo Yuan
Summary: A pilot-scale mainstream anammox process was implemented in an Integrated Fixed-film Activated Sludge configuration, achieving stable operation with robust NOB suppression. Three key control strategies were integrated, including low dissolved oxygen, regular FNA-based sludge treatment, and residual ammonium concentration control.
Article
Engineering, Environmental
Jiuling Li, Nur Nabilah Naina Mohamad, Keshab Sharma, Zhiguo Yuan
Summary: Establishing efficient boundary conditions is crucial for modeling heat transfer in sewers and recovering heat from wastewater. This study presents a novel approach using Fourier transform and data-driven models to determine the thickness of the soil layer and predict temperatures at the soil-layer boundary. The methodology improves the accuracy and speed of sewer heat transfer modeling.
Review
Engineering, Environmental
Liang Zhang, Yan-Ying Qiu, Keshab R. Sharma, Tao Shi, Yarong Song, Jianliang Sun, Zhensheng Liang, Zhiguo Yuan, Feng Jiang
Summary: This article provides a comprehensive review of sulfide control measures, including chemical additives, ventilation, and pipe material improvements, to prevent sewer corrosion and odor emission caused by sulfate-reducing bacteria. It emphasizes the importance of managing sewer networks as an integral part of an urban water system.
Article
Engineering, Environmental
Zhetai Hu, Tao Liu, Zicheng Su, Jing Zhao, Jianhua Guo, Shihu Hu, Zhiguo Yuan, Min Zheng
Summary: Acidic partial nitritation (PN) is a stable method for wastewater treatment that can achieve nitrite accumulation and ammonium reduction. However, directly applying anaerobic ammonium oxidation (anammox) to treat acid PN effluent is problematic. This study demonstrated the adaptation of anammox to acidic pH in a moving bed biofilm reactor (MBBR), achieving high nitrogen removal efficiency. The presence of biofilm plays a critical role in protecting anammox bacteria in acidic environments.
Article
Engineering, Environmental
Tao Liu, Shihu Hu, Zhiguo Yuan, Jianhua Guo
Summary: This study developed a novel technology using a granule-based sequencing batch reactor (GSBR) to achieve simultaneous removal of dissolved methane and nitrogen. The GSBR demonstrated high-level removal rates and efficiencies for nitrogen and dissolved methane during long-term demonstration. The availability of different electron acceptors significantly affected the removal of ammonium and dissolved methane, as well as the microbial communities and functional genes. These findings expand the applications of novel n-DAMO microorganisms and provide insights into microbial cooperation and competition in granular systems.
Article
Engineering, Environmental
Yanchen Liu, Zhiqiang Zuo, He Li, Yaxin Xing, Dong Cheng, Miao Guo, Tao Liu, Min Zheng, Zhiguo Yuan, Xia Huang
Summary: This study proposes a new approach for effective sulfide control in urban sewers. It involves the advanced oxidation of ferrous sulfide in sewer sediment to produce hydroxyl radicals, which can simultaneously oxidize sulfide and reduce microbial sulfate-reducing activity. Experimental results demonstrate that this method can substantially reduce sulfide concentration and save chemical use.
Article
Multidisciplinary Sciences
Zhetai Hu, Lanqing Li, Xiaotong Cen, Min Zheng, Shihu Hu, Xiuheng Wang, Yarong Song, Kangning Xu, Zhiguo Yuan
Summary: Integrated urban water management is an effective approach for managing urban water resources, which utilizes integrated technological solutions to achieve system-wide benefits. Research has shown that the process of producing iron salts can improve wastewater treatment in urban water systems and simultaneously recover high-quality bioenergy.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Xueqin Zhang, Georgina H. Joyce, Andy O. Leu, Jing Zhao, Hesamoddin Rabiee, Bernardino Virdis, Gene W. Tyson, Zhiguo Yuan, Simon J. Mcilroy, Shihu Hu
Summary: Anaerobic methanotrophic archaea (ANME) use multi-heme c-type cytochromes (MHCs) to mediate the reduction of metals and electrodes. Experimental evidence supports the involvement of these cytochromes in extracellular electron transfer (EET) from ANME to different electron sinks.
NATURE COMMUNICATIONS
(2023)
Article
Energy & Fuels
Jibing Qi, Yuliang Li, Youzhi Liu, Tong Yang, Yandong Liu, Zhiguo Yuan, Jianjun Yi
Summary: In this study, the Henry's law constant of volatiles in polymer systems was investigated by measuring the gas phase equilibrium partial pressure. The results show that the gas phase equilibrium partial pressure and Henry's law constant of volatiles increase with the increase of temperature and polymer viscosity.
CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Haoran Duan, Min Zheng, Jiyun Li, Tao Liu, Zhiyao Wang, Sohan Shrestha, Bingzheng Wang, Liu Ye, Shihu Hu, Zhiguo Yuan
Summary: This study investigates the impact of high hydraulic loading rates on partial nitritation and proposes operational strategies to facilitate mainstream partial nitritation and anaerobic ammonium oxidation process.
Article
Engineering, Environmental
Xiaotong Cen, Haoran Duan, Zhetai Hu, Xin Huang, Jiaying Li, Zhiguo Yuan, Min Zheng
Summary: The study shows that dosing magnesium hydroxide in sewer systems has various benefits on downstream treatment processes, including increasing sewage pH, reducing sulfide and methane concentrations, and increasing alkalinity and volatile fatty acids concentration in sewer effluent. Dosing magnesium hydroxide can also improve ammonium oxidation and NOx reduction rates in cases with limited alkalinity and carbon sources availability, without detrimental effects on anaerobic sludge digesters. Furthermore, the use of magnesium hydroxide dosing can potentially reduce downstream chemical demand and costs for carbon sources, pH adjustment, and sludge dewatering.
Article
Engineering, Environmental
Kefeng Zhang, Veljko Prodanovic, Hengke Zhao, Min Zheng, Shihu Hu, Pei-Ying Hong, Zhiguo Yuan, Ana Deletic
Summary: This study investigated the performance of vegetated biofiltration systems (VBS) in treating nitrogen-rich wastewater. The results showed that VBS was able to effectively treat nitrogen through traditional denitrification and the anaerobic ammonium oxidation (anammox) process. The type of carbon source and retention time had significant impacts on nitrogen removal, while dissolved oxygen levels did not. Microbial analysis revealed differences between different carbon sources and the presence of a suspected anammox genus in the system.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
