Article
Engineering, Environmental
Na Yu, Yufeng Lv, Bin Li, Jianxiao Wang, Hao Mou, Yimin Zhao
Summary: This study investigated the simultaneous phosphorus (P) removal and sludge reduction by extending the sludge retention time (SRT) in a continuous-flow reactor (CFR) with enhanced biological phosphorus removal (EBPR) granules. The results showed that without sludge discharge for 60 days, the COD and P removal efficiencies and settling ability of granules deteriorated, while the protein content increased and the sludge production reduced gradually due to the decrease of PAOs activities. However, with sludge discharge during the day 61-180, the performance of CFR and the settling ability of granules recovered gradually to an excellent level, achieving both sludge minimization and excellent P removal simultaneously. Illumina MiSeq sequencing results indicated that the increase of fermentative bacteria after extending the SRT played a key role in sludge reduction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Angelica Guerrero Calderon, Haoran Duan, Xiaoguang Chen, Ziping Wu, Wenbo Yu, Carlos E. Silva, Yijing Li, Sohan Shrestha, Zhiyao Wang, Jurg Keller, Zhongwei Chen, Zhiguo Yuan, Shihu Hu
Summary: The study found that Free Nitrous Acid (FNA) pre-treatment can effectively improve anaerobic digestion (AD) performance under different concentrations and durations, with the optimal condition being FNA concentration of 7.2 mgN/L and treatment duration of 24 hours. Changes in microbial communities supported the observation of enhanced sludge degradation with increasing FNA concentrations, but there were inconsistencies between short-term solubilization results and long-term AD performance.
Article
Agricultural Engineering
Qiulai He, Xiaohui Yan, Zhidong Fu, Yihang Zhang, Peng Bi, Xingliang Mo, Peng Xu, Jingwei Ma
Summary: This study investigated the application of an anaerobic/aerobic/anoxic system for simultaneous nitrification, denitrification, and phosphorus removal to treat low-strength wastewater. The results demonstrated the rapid start-up and satisfactory treatment performance of the conventional activated sludge system. The analysis of bacterial community dynamics and nitrogen metabolism pathway provided insights into the removal mechanisms.
BIORESOURCE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Peng Zhu, Zhen-Yu Wu, Ahmad Elgazzar, Changxin Dong, Tae-Ung Wi, Feng-Yang Chen, Yang Xia, Yuge Feng, Mohsen Shakouri, Jung Yoon (Timothy) Kim, Zhiwei Fang, T. Alan Hatton, Haotian Wang
Summary: This study demonstrates a continuous electrochemical carbon-capture design using an oxygen/water redox couple and a modular solid-electrolyte reactor. By performing oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) redox electrolysis, the device can efficiently absorb dilute carbon dioxide (CO2) molecules and continuously output a high-purity CO2 stream. The system achieves high capture rates, high Faradaic efficiencies, high carbon-removal efficiency, and low energy consumption.
Article
Environmental Sciences
Charikleia Zampeta, Maria Mastrantonaki, Niki Katsaouni, Zacharias Frontistis, P. G. Koutsoukos, Dimitris V. Vayenas
Summary: Printing ink wastewater with high COD, color, and TSS can be effectively treated using a continuous flow electrocoagulation reactor. Lower current density and flow rate can achieve higher pollutant removal for undiluted printing ink wastewater. The process is proven to be cost-effective for treating high COD printing ink wastewater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Junwen Ma, Yubo Cui, Chengdong Ma, Peijing Kuang, Ke Zhao, Kedong Ma, Zhaobo Chen
Summary: The distribution and removal pathways of heavy metals within different sludge treatment wetlands (STWs) during different running periods in Northeast China were investigated. The results showed that Cu and Zn accumulated faster within STW residual sludge, while Cd, Cr, Ni, and Pb accumulated more slowly and decreased slightly over time. The removal rates of heavy metals from the influent sludge by STWs ranged from 64.5% (Cr) to 92.2% (Zn). Reeds removed heavy metals from the STWs by direct absorption, and Zn was highly enriched in the reeds. The presence of reeds also promoted the spreading of heavy metals to the substrate layer and improved the removal of heavy metals in STWs. The mass of each heavy metal accumulated within the residual sludge of U2 and U3 was lower than that of U1, indicating that reeds could facilitate the removal of heavy metals. The STWs removed heavy metal mainly by substrate adsorption, and the mass percentage of heavy metals accumulated in the substrate ranged from 35.8 to 63.6%.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Leynard Natividad-Marin, Philip A. Schneider
Summary: Phosphorus recovery from human waste is important for global food security and environmental impact reduction. The precipitation of struvite in a two-zone reactor, along with periodic harvesting of crystals, allows for nutrient recovery. The experiments support the production of struvite.
Article
Environmental Sciences
Weihua He, Wenbiao Jin, Qing Wang, Yujie Feng
Summary: Microbial electrochemical system (MES) improves COD removal performance in domestic wastewater treatment by enhancing electricity generation, although only a small fraction of energy can be harvested as electricity, with most reduced COD being mineralized. Additionally, MES is characterized by low sludge yield and electron-flow-assisted COD removal as main advantages.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Jaroslav Mosko, Michal Jeremias, Siarhei Skoblia, Zdenek Beno, Vineet Singh Sikarwar, Matej Husek, Hailong Wang, Michael Pohorely
Summary: Residual moisture in pyrolyzed fuel affects the distribution and properties of pyrolysis products due to the concentration of steam in the primary pyrolysis gas. Using steam as a carrier gas results in significantly different product distribution and properties, especially at high temperatures. This approach offers a simplified way to predict and optimize pyrolysis products in large-scale units.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Agricultural Engineering
Qiang He, Jinjin Liu, Yongzhen Peng, Xiyao Li, Qiong Zhang
Summary: The use of sludge alkaline fermentation promoted nitrogen removal and enrichment of anammox bacteria in wastewater with low carbon-to-nitrogen (C/N) ratio. This system saves energy and reduces consumption significantly.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Huan Liu, Xuan Li, Ting Zhou, Zehao Zhang, Long D. Nghiem, Li Gao, Qilin Wang
Summary: This study comprehensively evaluated the impact of free ammonia (FA) pretreatment on the performance of anaerobic primary sludge (PS) digestion using semi-continuous systems. FA pretreatment improved the removal of volatile solids, chemical oxygen demand, and methane production. It also increased the biomass-specific hydrolysis rate of digesters. Model-based analysis revealed that the enhanced performance is due to the increased apparent hydrolysis rate and degradability extent of PS caused by FA pretreatment. Additionally, dewaterability of digested sludge and removals of fecal coliform and E. coli were enhanced by FA pretreatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Cheng Cheng, Jinju Geng, Haidong Hu, Yihan Shi, Rongwei Gao, Xu Wang, Hongqiang Ren
Summary: The study explored the enhanced effects of alternative aerobic and anaerobic conditions in side-stream reactors on sludge reduction and pollutants removal performance. The results showed improved sludge reduction and carbon reuse in the modified reactors, providing an efficient and cost-saving technology for application in wastewater treatment plants. The cooperation interaction of different microbial populations played a key role in enhancing the overall performance of the treatment system.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Chemical
Junwen Ma, Yubo Cui, Aimin Li, Wanjun Zhang, Chengdong Ma, Zhuma Luosang, Zhaobo Chen, Ke Zhao
Summary: The study found that wetlands with plants and aeration tubes had the highest efficiency in removing antibiotics, primarily through microbial degradation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Agricultural Engineering
Xiaodan Zhao, Jie Jiang, Zhen Zhou, Yue Zheng, Yanjun Shao, Yi Zuo, Yuqing Ren, Ying An
Summary: This study investigated the effects of hydraulic retention time of anaerobic side-stream reactors on nitrogen removal in four anoxic/oxic membrane bioreactors. The results showed that upgrading with anaerobic side-stream reactors and carriers can enhance nitrogen removal efficiency by increasing denitrifying bacteria and secondary substrate release. Additionally, metagenomic analysis revealed higher abundances of genes related to nitrogen consumption processes in the upgraded reactors, confirming their pivotal roles in nitrogen metabolism.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Sergio Santorio, Ana T. Couto, Catarina L. Amorim, Angeles Val del Rio, Luz Arregui, Anuska Mosquera-Corral, Paula M. L. Castro
Summary: This study evaluated and compared two types of granular sludge reactors for treating freshwater aquaculture streams, finding that AGS-SBR achieved high ammonium removal efficiency at low hydraulic retention time, while CFGR had a higher removal rate. The AGS-SBR achieved almost 100% ammonium removal, discharging a better quality effluent, while the CFGR had a 6 times higher ammonium removal rate and is suitable for treating high flows.
Article
Agricultural Engineering
Bastian R. Buys, A. Klapwijk, H. Elissen, W. H. Rulkens
BIORESOURCE TECHNOLOGY
(2008)
Article
Marine & Freshwater Biology
Hellen J. H. Elissen, Edwin T. H. M. Peeters, Bastian R. Buys, Abraham Klapwijk, Wim Rulkens
Article
Engineering, Environmental
T. L. G. Hendrickx, H. Temmink, H. J. H. Elissen, C. J. N. Buisman
JOURNAL OF HAZARDOUS MATERIALS
(2010)
Article
Engineering, Environmental
T. L. G. Hendrickx, H. Temmink, H. J. H. Elissen, C. J. N. Buisman
Article
Engineering, Environmental
T. L. G. Hendrickx, H. Temmink, H. J. H. Elissen, C. J. N. Buisman
Article
Engineering, Environmental
Hellen J. H. Elissen, Tim L. G. Hendrickx, Hardy Temmink, Cees J. N. Buisman
Article
Microbiology
O Drzyzga, J Gerritse, JA Dijk, H Elissen, JC Gottschal
ENVIRONMENTAL MICROBIOLOGY
(2001)
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)