Article
Energy & Fuels
Beibei Yan, Yuechi Che, Xutong Wang, Yingxiu Zhang, Jian Li, Zeng Dan, Keke Chang
Summary: This study investigates the feasibility of applying composting to Tibet and establishes a water-waste-nutrient nexus model to evaluate its environmental impacts and economic value. The experimental and modeling results both suggest that composting can effectively reduce the use of chemical fertilizers and increase economic benefits.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Jibao Liu, Zhen Bao, Chenlu Wang, Jinyi Wei, Yuansong Wei, Meixue Chen
Summary: This study investigated the transformation of mercury species, especially methylmercury, in sludge composting. The findings showed that there was no significant change in the overall content of mercury and methylmercury before and after composting, but a certain percentage of both were lost. Anaerobic bacteria were identified as the main methylators of mercury in the initial stages of composting. The study also revealed the presence of genes related to mercury transformation in various microbial genomes.
Article
Agricultural Engineering
Shudan Xue, Lina Zhou, Minzheng Zhong, Mukesh Kumar Awasthi, Hui Mao
Summary: The study found that adding bamboo biochar can reduce greenhouse gas emissions during sewage sludge composting, while different bacterial agents have varying effects on emissions. The nitrous oxide emissions are closely related to bacterial communities, with strong negative correlations with certain bacteria groups.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Long Pang, Ziling Huang, Peijie Yang, Mingkai Wu, Yanyan Zhang, Rong Pang, Baodan Jin, Ruiming Zhang
Summary: This study investigated the impact of biochar on the degradation of organophosphate esters (OPEs) during the aerobic composting of sewage sludge. The results showed that 10% biochar greatly promoted the decomposition of organic matter and significantly increased the degradation rate of OPEs. The presence of 10% biochar eliminated approximately 43.6% of the OPEs concentration.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Yufeng Jia, Yue Chen, Guangxia Qi, Bao Yu, Jianguo Liu, Ping Zhou, Yucheng Zhou
Summary: The aim of this study was to explore the dynamics and transformation pathways of dissolved organic matter (DOM) in sewage sludge (SS) during composting. The DOM of raw material, material experiencing thermophilic phase, and material collected from humification phase were characterized. The results showed that aliphatic/proteins and carbohydrate were preferentially decomposed in the thermophilic phase, while lignins/CRAM were the main N-containing substances evolved. The newly formed compounds in the maturity phase were beneficial for humic substances formation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Agricultural Engineering
Yanting Zhou, Haoran Zhao, Zonghui Lu, Xiuna Ren, Zengqiang Zhang, Quan Wang
Summary: This study investigated the effects of biochar derived from different sources on greenhouse gas and microplastics mitigation during sewage sludge composting. The addition of biochar significantly reduced N2O emissions and NH3 emissions, while having no apparent effect on CH4 emissions. Biochar also decreased the global warming potential and promoted the oxidation and degradation of microplastics. Moreover, biochar reduced the abundance of small-sized microplastics and regulated specific microbes to mitigate greenhouse gas emissions and microplastics degradation.
BIORESOURCE TECHNOLOGY
(2023)
Review
Environmental Sciences
Xinwei Sun, A. N. Anoopkumar, Aravind Madhavan, Parameswaran Binod, Ashok Pandey, Raveendran Sindhu, Mukesh Kumar Awasthi
Summary: Microplastics, as emerging contaminants, are widely present in various mediums, including sewage sludge. During the sewage treatment process, a large number of microplastics are deposited in the sludge and can migrate to other environmental media, posing a threat to human health. Therefore, the removal of microplastics from sewage sludge is necessary. Among various restoration methods, aerobic composting is emerging as a green method for microplastic removal. However, there are few studies on the degradation mechanism of microplastics in aerobic composting, hindering the innovation of composting methods. This paper discusses the degradation mechanism of microplastics in sewage sludge based on environmental factors and explores their potential hazards and future studies.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Sahar S. Dalahmeh, Gunnar Thorsen, Hakan Jonsson
Summary: During a 12-month study in Sweden, it was found that open-air storage without composting showed effective removal of hormones and antibiotics, but lower removal of pharmaceutically active substances. Composting resulted in degradation of hormones and a noticeable difference in concentrations of pharmaceuticals between the top and deeper layers of sludge piles.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Environmental Sciences
Amr Mustafa Abdelrahman, Hale Ozgun, Recep Kaan Dereli, Onur Isik, Onur Yilmaz Ozcan, Jules B. van Lier, Izzet Ozturk, Mustafa Evren Ersahin
Summary: Anaerobic membrane bioreactor (AnMBR) technology offers a promising solution for high solids concentration streams treatment, with increased digestion efficiency and enhanced effluent quality, leading to potentially lower costs and higher energy production. However, membrane fouling remains a challenge that requires further research for improvement.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Shihong Chen, Jun Gu, Siyuan Zhang, Ran Yu
Summary: Sewage sludge treatment and disposal is a challenging issue, and composting has gained attention for its cost-effectiveness and low greenhouse gas emissions. This review focuses on the applications of hyperthermophiles in composting, highlighting their improvements in temperature, product safety, nitrogen preservation, and humification. However, there are policy challenges and further research directions associated with the use of hyperthermophiles in sludge composting.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Review
Environmental Sciences
Bouchra El Hayany, Cornelia Rumpel, Mohamed Hafidi, Loubna El Fels
Summary: This paper reviews the quantity and characteristics of microplastics (MP) in sewage sludge from wastewater treatment plants globally, and compares their concentration, size, and type. It also discusses the degradation and fate control factors of microplastics during sludge treatment, and proposes two remediation practices.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Zulqarnain Fida, William E. Price, Biplob Kumar Pramanik, Bipro Ranjan Dhar, Manish Kumar, Guangming Jiang, Faisal Hai
Summary: The study examined the impact of sludge exchange rate between an MBR and side-stream anoxic reactors on reducing sludge yield, with a 11% exchange rate resulting in the highest reduction of 58%. Enhanced volatile solids destruction at this rate, through bacterial cell lysis and EPS destruction, contributed to the significant sludge reduction.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Yanfei Tang, Bin Dong, Xiaohu Dai
Summary: Hyperthermophilic pretreatment composting showed higher efficiency in sludge degradation and phytotoxicity removal, leading to enhanced humification and organic nitrogen retention. The pretreatment promoted protein transformation and humic acid polymerization, with the mechanism involving the stimulation of essential precursors formation and bacterial community evolution.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
G. Angeles-de Paz, R. Leon-Morcillo, S. Guzman, T. Robledo-Mahon, C. Pozo, C. Calvo, E. Aranda
Summary: Around 143,000 chemicals are present in wastewater treatment plants in the European Union, with low efficiency in their removal. A coupled biological technology using bioaugmentation and composting was successfully tested for the degradation of pharmaceutical active compounds and reduction of toxicity. This system showed better performance in degrading micropollutants and producing safer compost compared to traditional composting processes.
Article
Environmental Sciences
Yunbei Li, Junli Song, Tingting Liu, Jinghua Lv, Jishao Jiang
Summary: The study found that using RPP as a bulking agent can increase moisture content over 70%, leading to poorer porosity and less efficient O(2) utilization, which suppresses organic matter degradation. When the mixing ratio of sawdust and RPP was 1:1, improvements were seen in temperature, oxygen supply, and dissolved organic carbon degradation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Raju C. Asha, M. S. Priyanka Yadav, Mathava Kumar
ENVIRONMENTAL TECHNOLOGY
(2019)
Article
Environmental Sciences
P. Chinnaiyan, S. G. Thampi, M. Kumar, M. Balachandran
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2019)
Article
Engineering, Environmental
N. Neghi, Mathava Kumar, Danil Burkhalov
CHEMICAL ENGINEERING JOURNAL
(2019)
Review
Environmental Sciences
Minh Hang Do, Huu Hao Ngo, Wenshan Guo, Soon Woong Chang, Dinh Duc Nguyen, Yiwen Liu, Sunita Varjani, Mathava Kumar
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Engineering, Environmental
S. Manjunath, Ranu Singh Baghel, Mathava Kumar
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Md Rabiul Islam, Pratishtha Khurana, Pillalamarri Srikrishnarka, Ankit Nagar, Madhuri Jash, Shantha Kumar Jenifer, Mohd Azhardin Ganayee, Mathava Kumar, Thalappil Pradeep
Summary: Incorporating aminoclay-graphene oxide composites into reverse osmosis membranes has been shown to significantly improve desalination efficiency, with enhanced water permeation and salt rejection rates. Additionally, the membranes exhibit better stability and antifouling performance, suggesting energy-efficient desalination solutions.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Anwesha Mukhopadhyay, Binay Kumar Tripathy, Animesh Debnath, Mathava Kumar
Summary: CaFe2O4 nanoparticles were successfully synthesized and applied in enhancing the degradation efficiency of brilliant green dye in aqueous medium, with the degradation process optimized using response surface methodology. The addition of CaFe2O4 nanoparticles significantly improved the degradation efficiency in sono-catalytic system, while the presence of sodium chloride and sodium sulfate showed negative effects on degradation efficiency.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Neghi Nellaiappan, Gayathri Ravi, Mathava Kumar
Summary: The study aimed to compare the performance of composites GAC-TiO2 and CS-GO for removing antibiotic MET through adsorption and photocatalysis. Results showed that CS-GO had higher MET removal efficiency and adsorption capacity, making it suitable for continuous photocatalytic experiments.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2021)
Article
Engineering, Environmental
Sudeeptha Girijan, Mathava Kumar
Summary: This study examines the removal of the pharmaceutical antibiotic metronidazole (MNZ) from synthetic wastewater using biomass immobilized with powdered activated carbon (PAC) in an alginate matrix. The results show that the PAC-biomass beads can efficiently remove MNZ and NH3, with the bead loading having minimal impact on the removal efficiency.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2022)
Article
Engineering, Environmental
Onkar Sudhir Ekande, Mathava Kumar
Summary: A piezocatalytic heterojunction was synthesized by using sodium niobate (NaNbO3) and molybdenum disulfide sheets (MoS2). The removal of metronidazole (MET) using the MS(x)/NBO heterojunction was tested and the optimal condition was found to be MS(30)/NBO with 30 wt% of MS, resulting in a removal efficiency of 82.8%. The removal mechanism involved the generation of (OH)-O-center dot, electrocatalytic oxidation, and oxidation by holes in the depletion region.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Dinkar Parashar, Afrah Harafan, Gopal Achari, Mathava Kumar
Summary: This study investigated the adsorption of metronidazole (MNZ) and ciprofloxacin (CIP) as single and binary mixtures, revealing synergistic and antagonistic effects between the two antibiotics. The chitosan-modified graphene oxide adsorbent showed good performance and stability in removing both antibiotics, but repeated use resulted in decreased removal efficiency.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2023)
Article
Engineering, Environmental
Mohamed Abubakar Sithik Ali, Inigo Johnson, Mathava Kumar
Summary: The treatment of anaerobically digested distillery wastewater (ADWW) was examined using coagulation-flocculation (C-F) followed by a microalgal system. Optimum C-F conditions (FeCl3 approximately 3 g/L, PAC approximately 6 mg/L, pH approximately 5, dilution ratio approximately 4D) resulted in approximately 99.3%, 73.6%, and 58.3% removal of turbidity, color, and chemical oxygen demand (COD), respectively. Microalgal treatment of C-F-treated ADWW (CADWW) showed higher efficiency at 10D dilution and a photoperiod of 16 h:8 h light:dark cycle. The overall removal rates of COD, TOC, TN, melanoidin, and phenolics by this sequential process were 68%, 51%, 78%, 93%, and 90%, respectively. The harvested microalgae had a higher heating value of 28.66 MJ/kg and a lipid content of 24.2%. Sequential C-F and microalgal treatment can be an effective strategy for energy recovery during ADWW treatment.
JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE
(2023)
Article
Chemistry, Physical
Onkar Sudhir Ekande, Mathava Kumar
Summary: Piezocatalytic removal of metronidazole (MET) was achieved using a heterojunction of graphitic carbon nitride (g-C3N4, GCN) and sodium niobate (NaNbO3) under ultrasonication. The optimized GCN(50)/NaNbO3 hetero-junction showed 87.2% MET removal within 160 min. The study identified a new pathway for the generation of reactive oxygen species (ROS) via the piezocatalytic heterojunction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Sonam Tantuvoy, Mathava Kumar, Indumathi Nambi
Summary: The investigation focused on the activation of persulfate by zirconium oxide under microwave irradiation for efficient degradation of methyl orange dye, achieving high removal rates and reduced toxicity under optimal conditions. The catalytic oxidation of MO was not affected by the presence of NaCl, indicating the potential of transition metal-based persulfate activation as an alternative for dye wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Engineering, Environmental
Onkar Sudhir Ekande, Mathava Kumar
Summary: The review discusses the application of PANI photocatalysts in the generation of S-scheme heterojunctions, highlighting their stability and potential applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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)
