Article
Green & Sustainable Science & Technology
Pascal Ochs, Ben Martin, Eve Germain-Cripps, Tom Stephenson, Mark van Loosdrecht, Ana Soares
Summary: Over the past twenty years, various commercial technologies have been deployed to remove ammonia from anaerobic digestion liquors. This study provides a comparative techno-economic assessment of sidestream technologies to remove ammonia from conventional AD and THP/AD dewatering liquors. The study identified that deammonification is a capable and cost-effective nitrogen removal technology.
ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
(2023)
Article
Environmental Sciences
Gholamreza Bahreini, Moustafa Elbahrawi, Elsayed Elbeshbishy, Domenico Santoro, George Nakhla
Summary: This research compared the impact of primary clarification and rotating belt filtration on biological nutrients removal processes, finding that SFL can effectively enhance BNR. The study also showed that the addition of SFL significantly increased the removal efficiency of reactors, with stable nutrient concentrations of nitrogen and phosphorus in the effluent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Yao Chen, Ying Zhang, Liang Zhang, Shujun Zhang, Yongzhen Peng
Summary: Partial nitrification and partial denitrification combined with anammox is a promising process for sewage treatment, which was successfully achieved in this study by adding sludge fermentation products in the anoxic zone to facilitate nitrite accumulation and improve denitrification efficiency. The system achieved a high removal rate of total nitrogen, with enriched incomplete denitrifiers and ammonia oxidizing bacteria contributing to the high nitrite accumulation.
Article
Environmental Sciences
Youqi Tao, Rui Shi, Linjing Li, Suhui Xia, Jianyong Ning, Wenlai Xu
Summary: This study addressed the issues of sludge floating and uneven mass transfer in up-flow partial denitrification/anammox (PDA) reactors by implementing two strategies: adding biological carriers and applying mechanical stirring. The results showed that both strategies effectively prevented sludge flotation and deterioration of settling performance. Mechanical agitation had a more significant positive impact on PDA performance compared to the addition of biocarriers as it achieved more adequate mass transfer.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Xiping Liu, Xiyao Li, Yongzhen Peng, Qiong Zhang, Hao Jiang, Jiantao Ji
Summary: The study successfully established a SPDAF system for combined treatment of domestic sewage and nitrate wastewater from industrial areas, achieving a high TIN removal efficiency of 89.5%. Anammox played a crucial role in TIN removal, while in-situ fermentation provided electron donors to promote the utilization of complex organics.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Pascal Ochs, Benjamin D. Martin, Eve Germain, Tom Stephenson, Mark van Loosdrecht, Ana Soares
Summary: This study tested different technologies for removing ammonia from sludge dewatering liquors and found that S-SBR and G-SBR performed the best, while N-SBR performed the worst, with MEDIA falling in between. The main contributor to stability and nitrogen removal rate was identified as the instrumentation and control strategy.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Biao Mu, Wei Zhu, Jun Zhong, Le Chen, Naixi Lin, Chenyu Wang, Sipeng Chen, Zhuo Li
Summary: This study used liquefied dimethyl ether (L-DME) for the first time to dewater oily sludge, achieving 90% water removal and 40% oil recovery, which is a remarkable dehydration effect.
Article
Engineering, Environmental
Bao Nguyen Quoc, Maxwell Armenta, John A. Carter, Robert Bucher, Pardi Sukapanpotharam, Samuel J. Bryson, David A. Stahl, H. David Stensel, Mari-Karoliina H. Winkler
Summary: The study found that the size of granules has a significant impact on the SND and biological phosphorus removal processes in the AGS system. Selecting granules within the size range of 212 - 1000 μm and avoiding DO values higher than 3 mgO(2)/L can achieve higher nitrogen removal capacity and energy savings.
Article
Engineering, Environmental
Chen Wang, Wei Wei, Xiaohu Dai, Bing-Jie Ni
Summary: The effects of zero-valent iron (ZVI) on aerobic sludge digestion were studied, and it was found that ZVI greatly enhanced sludge degradation, nitrogen removal, and sludge dewaterability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Zihang Ma, Lifeng Lin, Jiafu Xi, Xiaolu Gong, Jianqiao Wang, Peng Peng, Ying An, Weijie Hu, Jing Cao, Zhichao Wu, Zhen Zhou
Summary: This study evaluated the nitrogen removal performance for treating landfill sludge dewatering liquid by operating two pilot-scale two-stage anoxic/oxic membrane bioreactors at different dissolved oxygen (DO) levels. The results showed that partial nitrification-denitrification was achieved under high or conventional DO conditions, with stable partial nitrification ensured by high-concentration free ammonia (FA). The high DO system exhibited higher nitrite accumulation and nitrogen removal, mainly attributed to partial nitrification-denitrification. High DO condition improved the abundance and ability of ammonia-oxidizing bacteria (AOB) but had little effect on nitrite-oxidizing bacteria. Metagenomic analysis confirmed the important role of partial nitrification in nitrogen removal in the high DO system.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Fangzhai Zhang, Yongzhen Peng, Zhong Wang, Hao Jiang, Shang Ren, Jingang Qiu
Summary: A novel process combining partial nitrification, fermentation, and Anammox-partial denitrification was proposed for co-treating ammonia-rich sludge supernatant, external WAS, and WWTP secondary effluent, achieving excellent nitrogen removal efficiency and external sludge reduction. This process showed significant collaboration between Anammox bacteria and partial denitrifying bacteria in the AD-UASB reactor, contributing to up to 84.1% of nitrogen removal, while saving organic resource demand and aeration consumption compared to traditional nitrification-denitrification processes.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Chew Lee Leong, Seow Wah How, Mohamad Fairus Rabuni, Alijah Mohd Aris, Bee Chin Khor, Thomas P. Curtis, Adeline Seak May Chua
Summary: Conventionally, high DO concentrations are required for nitrification in biological nitrogen removal (BNR), making the process energy intensive. However, recent studies have shown that efficient ammonium removal and energy reduction can be achieved by operating nitrification at low DO concentrations. This study evaluated the feasibility of nitrogen removal from low COD/N tropical municipal wastewater using a low-DO oxic anoxic process. The results demonstrated high removal efficiency for ammonium and total nitrogen under low DO conditions, contributing to energy efficiency and sustainability.
Article
Engineering, Environmental
Lin Wang, Songhao Shang, Wenzhi Liu, Dongli She, Wei Hu, Yi Liu
Summary: The study investigated the variation of nitrogen components in different aquatic ecosystems and found that nitrogen removal occurred during water flow, with a reduction rate of up to 43%. The heterogeneity in eco-stoichiometric characteristics of nitrogen components was higher in ditches and ponds compared to rivers and reservoirs. Ditches and ponds showed stronger interactions between overlying water and sediment, with higher rates of denitrification and anaerobic ammonium oxidation. The findings emphasize the importance of focusing on the upper reaches of agricultural catchments for nitrogen removal and developing region-specific conservation strategies to mitigate nitrogen pollution and protect water resources.
Review
Engineering, Environmental
Wei Lin, Xiao Liu, An Ding, Huu Hao Ngo, Rourou Zhang, Jun Nan, Jun Ma, Guibai Li
Summary: This review highlights the importance of applying advanced oxidation processes in sludge dewatering to improve treatment efficiency. It discusses the different mechanisms of oxidants in enhancing sludge dewatering and removing micropollutants, as well as the factors influencing sludge minimization and micropollutant removal processes. The review also suggests future applications of advanced oxidation methods based on technoeconomic analyses of dewatering efficiency and operation cost.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Zijing Li, Yifu Li, Dongbo Wang, Longhu Yuan, Xuran Liu, Chuli Pan, Xunkuo Zhang
Summary: This study investigates how cetyl trimethyl ammonium bromide (CTAB) improves sludge dewaterability. The results show that CTAB can decrease the capillary suction time, specific resistance to filtration, and water content of sludge cake. The mechanism reveals that CTAB can neutralize negative charges on EPS surface, enhance hydrophobicity and adhesion among sludge particles, and release intracellular water by damaging the outer membrane of sludge cells. CTAB also reduces the concentrations of PO3- 4 , humic acid, and proteins in the liquid phase. These findings deepen our understanding of CTAB's effect on sludge dewatering.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Yandong Yang, Yiming Jiang, Yanan Long, Jiarui Xu, Changqing Liu, Liang Zhang, Yongzhen Peng
Summary: This study investigates the impact of residual ammonium on the stability of mainstream partial nitritation/anammox (PN/A) systems and reveals that low ammonium conditions lead to a decline in anammox activity and increased nitrite oxidation rate. The study provides insights for the optimized design of mainstream PN/A systems in engineering applications.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Engineering, Environmental
Huihui Cui, Liang Zhang, Yongzhen Peng, Qiong Zhang, Xiyao Li
Summary: This study achieved stable nitritation by eliminating both Nitrobacter and Nitrospira through combining nitrite exposure inhibition with high dissolved oxygen reactivation. High dissolved oxygen reactivation promoted the growth of ammonia-oxidizing bacteria while severely inhibiting Nitrospira.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Agricultural Engineering
Xiaofei Gong, Liang Zhang, Qingteng Gong, Xuefan Liu, Xiyao Li, Qiong Zhang, Yongzhen Peng
Summary: In this study, a novel strategy using activated sludge as inoculum and biocarrier in a dynamic fixed-bed reactor was proposed, which successfully cultivated and enriched AnAOB. With this strategy, excellent performance was achieved during the 115-day operation.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Huihui Cui, Liang Zhang, Qiong Zhang, Xiyao Li, Yongzhen Peng
Summary: This study found that comammox bacteria, which were previously overlooked, are the most important ammonia-oxidizing microbes in Anammox systems, and play a significant role in nitrogen removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xinjie Gao, Liang Zhang, Yongzhen Peng, Jing Ding, Zeming An
Summary: The study found that stable nitrogen removal can be achieved in the anaerobic/aerobic/anoxic process by directly integrating stable anammox. The anammox activity compensates for the effects of low temperatures and low C/N ratios on nitrification and denitrification, leading to a stable nitrogen removal efficiency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Xiaofei Gong, Liang Zhang, Xiyao Li, Qiong Zhang, Taotao Shang, Jingwen Guo, Chuanxin Wang, Shuying Wang, Yongzhen Peng
Summary: This study proposed a novel Integrated Anammox, Fermentation and Denitrification (IAFD) process which achieved a high efficiency of nitrogen removal from wastewater. The process showed environmental and economical advantages with no external carbon requirement, reduced aeration, and sludge reduction.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Tipei Jia, Liang Zhang, Shihao Sun, Qi Zhao, Yongzhen Peng
Summary: In this study, acidophilic mixotrophic sulfur-oxidizing bacteria (SOB) were enriched under extremely acidic conditions to enhance bio-desulfurization performance. The addition of organics improved the H2S removal efficiency. Maintaining an appropriate biofilm mass is crucial for optimal desulfurization performance. The findings of this study offer a novel strategy for enhancing H2S removal.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Tipei Jia, Liang Zhang, Xiyao Li, Qi Zhao, Yongzhen Peng, Jun Sui, Chuanxin Wang
Summary: This study investigates the impact of seasonal temperature variations on the performance of a biotrickling filter system in removing hydrogen sulfide from air. It is found that the system achieves the highest removal efficiency at temperatures of 10-12 degrees Celsius. The accelerated growth of biofilm, enhanced biofilm adhesion capacity, and sulfur accumulation contribute to heat retention in cold conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Shenhua Yang, Haibin Chang, Yongzhen Peng, Shujun Zhang, Xiaoyu Han, Shihao Sun, Jinjin Liu, Liang Zhang
Summary: Adding fermented sludge products to SBR can enhance nutrient removal and reduce sewage treatment costs.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Engineering, Environmental
Hanbin Wang, Liang Zhang, Qiongpeng Dan, Yingxin Zhang, Shuying Wang, Qiong Zhang, Xiyao Li, Chuanxin Wang, Yongzhen Peng
Summary: Integrating endogenous denitrification (ED) into partial nitrification-anammox (PNA) systems using organic matter in municipal wastewater effectively improves nitrogen removal efficiency. A novel strategy was adopted to inhibit phosphorus-accumulating organisms (PAOs) by inducing phosphorus release and exclusion, optimizing organics allocation between PAOs and glycogen-accumulating organisms (GAOs). This study achieved an NRE of 97.5 +/- 2.2% and effluent total inorganic nitrogen (TIN) of less than 2.0 mg/L using enhanced ED-synergized anammox for real municipal wastewater treatment.
Article
Environmental Sciences
Bingxin Li, Ruochen Wang, Weiwei Zuo, Yi Peng, Dong An, Liang Zhang, Zheng Ge
Summary: A lab-scale ceramic membrane bioreactor (MBR) with an active membrane-fouling control system was developed for the partial nitrification (PN) process. The in situ membrane cleaning method was used for uninterrupted removal of contaminants on the membrane surface. The device increased critical flux, reduced gel layer resistance (R-g), and internal resistance (R-i) of the flat-sheet ceramic membrane by inhibiting cake layer formation. In long-term experiments, nitrite oxidizing bacteria (NOB) were successfully suppressed, achieving high nitrite accumulation rate (NAR) of up to 90.09%. The maintained balance between effluent NO2--N/NH4+-N ratios would promote the proliferation of Anammox bacteria and the autotrophic nitrogen removal (ANR) process. Moreover, in situ cleaning significantly reduced energy input from aeration and ensured stable PN performance by avoiding over aeration.
Article
Engineering, Environmental
Yandong Yang, Yongzhen Peng, Jun Cheng, Shujun Zhang, Changqing Liu, Liang Zhang
Summary: A novel two-stage aerobic granular sludge (AGS) system was developed for municipal wastewater treatment, achieving high removal efficiencies of phosphorus (91%) and nitrogen (81%) with a low influent carbon/nitrogen ratio. The high nutrient removal was attributed to microbial segregation in the two SBRs. The first reactor promoted enhanced biological phosphorus removal (EBPR) with the high abundance of polyphosphate-accumulating organisms (Candidatus Accumulibacter 15.3%), while the second reactor removed residual ammonium via partial nitritation/ anammox (PN/A). The system also facilitated sludge maintenance and reduced settling time, providing opportunities for resource and bioenergy recovery.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Zhaoyang Li, Liang Zhang, Yongzhen Peng, Jialin Li
Summary: This study investigated the relationship between the performance and ecological features of a one-stage partial nitritation and anammox system disturbed by oxygen. The disturbance resulted in an irreversible deterioration of nitrogen removal rate and reduced richness and evenness of the microbial community. Additionally, the community structure changed and 234 operational taxonomic units were depleted. The study highlights the importance of ecological features in diagnosing, predicting, and optimizing the performance of partial nitritation and anammox systems.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Xiaofei Gong, Feng Hou, Hongtao Pang, Yuanyuan Guo, Qiong Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: This study achieved stable and efficient nitrogen removal through a zero-external carbon Partial Nitritation/Anammox combined with in-situ sludge Fermentation-Denitrification process under decreased temperatures. The findings show the resilience of anammox to lower temperatures and highlight the importance of sludge reduction and organic recovery for enhanced denitrification.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)
