Article
Engineering, Environmental
Mohini Verma, Shubhrasekhar Chakraborty, Shweta Kumari, Aalok Gupta, Dewanshu Kumar, Jawed Iqbal, J. Rajesh Banu, Arulazhagan Pugazhendi, R. Naresh Kumar
Summary: A laboratory-scale GAC-SBR was used to co-treat landfill leachate and municipal wastewater, and the treatment efficiency was evaluated. Increasing GAC concentration led to better removal of COD and ammonia from leachate. GAC-SBR demonstrated efficient removal of COD and nutrients at a 10-day HRT. Statistically significant differences were observed in the treatments for different leachate:wastewater ratios. Coupled treatment showed potential for co-treatment, but additional physico-chemical processes may be required for further pollutant removal.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Environmental Sciences
Xiaochun Wang, Ji Li, Xiaolei Zhang, Zhonglin Chen, Jimin Shen, Jing Kang
Summary: The study investigated the impact of hydraulic retention time (HRT) on the performance of aerobic granular sludge (AGS) treating swine wastewater in sequencing batch reactors (SBR). Results showed that decreasing HRT from 16 to 8 h improved sedimentation performance and biomass concentration, but further reduction to 4.8 h led to worse AGS performance. AGS process with 8 h HRT exhibited high pollutant removal efficiency and stable microbial community structure.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Ling Lin, Shuangshuang Chen, Yi Hou, Lirong Lei
Summary: This study systematically investigated the formation process and mechanism of aerobic granular sludge in an SBBGR and successfully cultivated aerobic granular sludge with good performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Yanjie Wei, Yuanyao Ye, Min Ji, Shitao Peng, Feifei Qin, Wenshan Guo, Huu Hao Ngo
Summary: This study utilized aerobic granular sludge technology to remove ammonium from landfill leachate, analyzing the stability of microbial community structures using PCR-DGGE technology. It was found that high nitrogen loading rates hindered ammonium removal, while low loading rates achieved satisfactory results, indicating the importance of stable wastewater treatment bioreactors in maintaining microbial community stability.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Hossam A. Abdelaziz, Moharram Fouad, Mohamed Mossad
Summary: The upgraded SBR, with fixed biofilm carriers, showed higher resistance to phenol compounds, improved sludge settling properties, and reduced excess sludge compared to the conventional SBR. It also achieved higher phenol removal efficiency and reduced aeration steps. Additionally, the upgraded SBR had a higher operational stability with an increased number of cycles per day.
WATER ENVIRONMENT RESEARCH
(2021)
Review
Engineering, Environmental
Dong Xu, Jun Li, Jun Liu, Xinghong Qu, Hailing Ma
Summary: Aerobic granule in continuous-flow process has attracted global interest in the field of biological wastewater treatment, with advancements made in the treatment of complex pollutants, reactor configurations, and granule stability. This review discusses the challenges and prospects of applying this technology at full scale, aiming to contribute to the dissemination of practical applications.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Zhuo Sun, Jiaming Zhang, Jin Wang, Hongxiang Zhu, Jianhua Xiong, Guoyou Nong, Mengqi Luo, Jue Wang
Summary: This study proposes a method for integrating spherical pelletizing granular sludge into a continuous up-flow reactor, showing good treatment efficiency and high pollutant removal rates. The presence of specific functional microorganisms promotes the secretion of extracellular polymeric substances.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Sayeh Parandoush, Nader Mokhtarani
Summary: The effects of ultrasonic waves and ozonation on the reduction of produced sludge in the SBR system were investigated. The results showed that the integration of ozone with a specific level of ultrasonic energy can significantly decrease sludge production, with high removal efficiencies of COD, total nitrogen, and total phosphorus.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biotechnology & Applied Microbiology
Ali Assadi, Roya Alimoradzadeh, Hossein Movahedyan, Mohammad Mehdi Amin
Summary: This study investigated the microbial and biodegradation kinetics of acclimated-mixed sludge to 4-chlorophenol in an aerobic sequencing batch reactor. The biodegradation kinetics were predicted accurately using the Haldane formulae. However, pure strains isolated from mixed sludge did not show higher 4-CP-removal efficiency due to the presence of an intermediate meta-cleavage product.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Green & Sustainable Science & Technology
Lin Liu, Yu Xin, Zhong-Hua Tong, Yu-Ming Zheng, Jia-Fang Xie, Quan-Bao Zhao, Han-Qing Yu
Summary: Aerobic algae-bacteria granular consortia (AAG) is a novel biotechnology for wastewater treatment. This study investigated the influence of storage process on AAG, finding that AAG could maintain its granular structure under different storage conditions. Storage at higher temperatures resulted in better performance of AAG. Storage time was negatively related to EPS concentration and polysaccharides/protein ratio of AAG, while illumination was conducive to maintaining the polysaccharides/protein ratio. During the activation process, temperature and illumination were significant factors influencing the relative abundance of target microalgae.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Mingjing Zeng, Yu Zeng, Binchao Zhang, Yuanyuan Cheng, Bei Long, Junfeng Wu, Shuai Ren, Yong Liu
Summary: The performance of endogenous/exogenous nitrification and denitrification in treating inorganic wastewater with high ammonia nitrogen concentration was investigated. It was found that the addition of external carbon sources improved the adaptability of aerobic granules and increased the removal efficiency of total inorganic nitrogen (TIN). The coupling of endogenous/exogenous nitrification and denitrification reduced the consumption of aeration, saved external carbon source dosage, and decreased alkalinity consumption. This study provides an alternative option for treating wastewater from ionic rare earth mines.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Fatimah S. Al-Khattaf, Mysoon M. Al-Ansari, Murali Kannan Maruthamuthu, L. Dyona, Paul Agastian
Summary: The study aimed to degrade poly-beta-hydroxybutyrate (P(3HB)) in the sequencing batch biofilm reactor (SBBR) using biocatalyst, with enrichment method successfully isolating P(3HB) degrading bacteria such as Pseudomonas aeruginosa KS10 and Nitrobacter vulgaris SW1. Results showed that these bacteria were effective in degrading P(3HB), reducing environmental pollution associated with petroleum-based polymers.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Zengrui Pan, Tao Guo, Jianlong Sheng, Hongbo Feng, Anqi Yan, Jun Li
Summary: By adding waste iron shavings in sequencing batch reactor (SBR), aerobic granular sludge (AGS) was successfully cultivated, achieving high removal efficiency of nitrogen and phosphorus. The micro-electrolysis of iron shavings produced active substances beneficial for granulation and pollutants removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Zengrui Pan, Chong Qiu, Qianjin Yang, Hongtang Wei, Jinbo Pan, Jianlong Sheng, Jun Li
Summary: In this study, a pilot-scale two-stage SBRs with added waste iron shavings was established to cultivate aerobic granular sludge for real wastewater treatment. The results showed successful cultivation of aerobic granular sludge with satisfactory treatment performance, achieving effective removal of COD, TP, NH4+-N, TN, and SS in the wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Fenghao Cui, Minkyung Kim, Wonbae Lee, Chul Park, Moonil Kim
Summary: This paper demonstrates the modeling of the aerobic granular sludge (AGS) process using pseudo-analytical solutions (PAS) of a biofilm model. The model calibration and validation were conducted using experimental data, revealing the distribution of heterotrophs and nitrifiers on the AGS and their impact on wastewater treatment performance. The models show increasing degrees of interaction between heterotrophs and nitrifiers, providing a better understanding of the multi-species biofilms.
ENVIRONMENTAL TECHNOLOGY
(2021)
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)