Article
Engineering, Environmental
Wenbo Yu, Haoran Duan, Zhiyao Wang, Jiakuan Yang, Zhiguo Yuan, Min Zheng
Summary: This study proposes an optimal integrated strategy for recovery and carbon sink in anaerobically digested sludge management by considering low-valued recyclables recycling and non-recyclables reduction. Acid-elutriation effectively reduces the water content and volume of the sludge, improves its stability, and enhances the quality by removing metals. The study suggests potential opportunities for combining acid-elutriation with other treatment technologies to achieve enhanced dewatering performance.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Review
Engineering, Environmental
Zhiyao Wang, Tao Liu, Haoran Duan, Yarong Song, Xi Lu, Shihu Hu, Zhiguo Yuan, Damien Batstone, Min Zheng
Summary: The study reviewed the current status and challenges of post-treatment technologies for anaerobically digested sludge, proposing a multi-target approach to achieve sludge volume reduction, stabilization, and metal solubilization. The authors suggested developing more methods to promote AD sludge management towards a more economically favorable, socially acceptable, and environmentally sustainable direction.
Article
Green & Sustainable Science & Technology
Chen Cai, Chongliang Hu, Wan Yang, Yu Hua, Lei Li, Donghai Yang, Xiaohu Dai
Summary: The study investigated the effects of post-thermal hydrolysis process (THP) temperature on methane yields, dewatering performance, and antibiotic resistance genes (ARGs) in sludge digestate. Results showed that temperatures above 160 degrees C were optimal, leading to increased methane yield, improved dewatering performance, and reduced abundance of ARGs. The energy balance analysis indicated that the AD-THP configuration could be a promising alternative for sustainable disposal of excess sludge, with a net energy output up to 372 kW.h/t DS.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Haochi Zhang, Dejin Zhang, Yujun Zhou, Di Fang, Chunhong Cui, Jianru Liang, Bo Zhou, Mingjiang Zhang, Jiansheng Li, Lixiang Zhou
Summary: This study found that bioleaching was not effective for anaerobically digested sludge (ADS) compared to undigested sludge (UDS). The specific resistance to filtration of ADS increased during bioleaching, and the pH value of ADS remained unchanged at 7.97, while it decreased to 2.98 for UDS. Added Fe2+ was not detected as an energy source for ADS. Higher alkalinity and unavailable Fe2+ in ADS hindered the growth of Acidithiobacillus species. Aeration significantly deteriorated the dewaterability of ADS through bioleaching, with a drastic increase in sludge pH and slime EPS content.
Article
Engineering, Environmental
Shun Zhang, Shiyu Miao, Xiaoqiang An, Huachun Lan, Ruiping Liu, Jianfeng Peng, Huijuan Liu, Jiuhui Qu
Summary: This study investigated the transformation process of typical components in sludge and found that the improvement of sludge dewaterability was due to the disruption of EPS and the release of intracellular substances. The oxidation of sulfides into sulfate by KMnO4 effectively inhibited the release of hazardous H2S, even at a low pH. Additionally, the interaction between Fe2+ and KMnO4 completely immobilized PO43- in the centrifugate.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Green & Sustainable Science & Technology
Haixiao Guo, Lixin Tian, Yufen Wang, Tingting Zhu, Yindong Tong, Yiwen Liu
Summary: This study explores a new pretreatment strategy using beta-CD to enhance methane production and improve dewaterability of waste activated sludge in two-phase anaerobic digestion. Results show that beta-CD significantly increases methane yield and improves the solubilization and acidification processes of the sludge, as well as methane fermentation.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Linan Xing, Mingyue Zheng, Christopher W. K. Chow, Xiulan Xin, Ye Li, Xiaohui Zhang, Qiangqiang Cheng
Summary: This study compared the dewatering capacity of two chemical coagulants, high-performance polyaluminum chloride (HPAC) and FeCl3, on mesophilic and thermophilic anaerobic digested sludge. The results showed that for mesophilic anaerobic digestion, the optimal dose of FeCl3 and HPAC to improve dewaterability was 5% g/g total suspended solids (TSS), with HPAC being superior to ferric chloride in removing loosely bound extracellular polymeric substances (LB-EPS) and tightly bound extracellular polymeric substances (TB-EPS). For thermophilic anaerobic sludge, HPAC was more effective than FeCl3 in improving dewaterability, with FeCl3 effectively removing TB-EPS and HPAC having better removal efficiency on soluble extracellular polymeric substances (S-EPS) and LB-EPS. Both coagulants showed potential in degrading EPS during thermophilic anaerobic digestion sludge treatment.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2023)
Article
Environmental Sciences
Lu Yang, Jie Jin, Yichu Wang, Weiqi An, Yunao Zhao, Chao Cui, Lanfang Han, Xiangke Wang
Summary: HT-AD sludge can be used as an efficient uranium (VI) adsorbent with good reusability and environmental safety, with primary mechanisms of adsorption being surface complexation and electric attraction.
Article
Engineering, Chemical
Taishan Liu, Xinyang Zhang, Guangchao Ding, Songgeng Li
Summary: This study proposes a novel sludge conditioning method incorporating sludge-based carbon (SBC) to improve sludge dewaterability. The co-conditioning method effectively reduces specific resistance to filtration, moisture content of the filter cake, and sludge compressibility coefficient, while increasing the net sludge solids yield. The mechanism involves a synergistic effect of coagulation, adsorption, and flocculation, with SBC optimizing coagulation by electrostatic neutralization and strengthening flocculation by bridging biopolymers and PAM.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
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)
Article
Green & Sustainable Science & Technology
Yuan Liu, Jie Jin, Jiawei Li, Ziwei Zou, Renchan Lei, Jintao Sun, Jinxia Xia
Summary: In this study, magnetic biochar (MBC) was used to enhance phosphorus (P) recovery. The results showed that MBC addition increased the formation of vivianite and decreased the proportion of water-extractable P.
Article
Engineering, Environmental
Yifu Li, Dongbo Wang, Guojing Yang, Xingzhong Yuan, Longhu Yuan, Zijing Li, Qiuxiang Xu, Xuran Liu, Qi Yang, Wangwang Tang, Longbo Jiang, Hailong Li, Qilin Wang, Bingjie Ni
Summary: The SPC/ZVI conditioning improved the dewatering performance of ADS by disrupting EPS, damaging cell membranes, lysing intracellular substances, releasing bound water, and breaking down microbes through the actions of OH· and Fe(III)/iron polymers. This process led to the formation of macro-pores in ADS, conformational changes in proteins, increased hydrophobicity, and promotion of cell-to-cell aggregation. Additionally, Fe(III)/iron polymers accelerated ADS aggregation and maintained its floc structure, resulting in enhanced dewaterability. The SPC/ZVI conditioning may also overcome limitations present in ZVI/peroxide or ZVI/persulfate techniques.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biology
Mahmut Tepecik, Ali Riza Ongun, Huseyin Husnu Kayikcioglu, Sezai Delibacak, Omer Lutfu Elmaci, Ahmet Esen Celen, Emre Ilker
Summary: The application of treated municipal sewage sludge at different rates significantly increased cotton plant yield, especially at 30 t/ha. It also had a positive effect on the concentration of nutrients like nitrogen, phosphorus, and potassium in the plants.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2022)
Article
Environmental Sciences
Luc Duc Phung, Chiekh Adrame Ba, Putri Aditya Padma Pertiwi, Ayumi Ito, Toru Watanabe
Summary: This study aims to investigate the effects of using centrate derived from anaerobically digested sewage sludge as a topdressing in rice fields fertilized with composted sewage sludge (CSS) on rice yield, nutrient quality, and soil fertility. The results showed that the application of centrate as topdressing improved the plant's nitrogen status, resulting in increased biomass and grain yield. However, there were concerns about the accumulation of arsenic in rice grains when using centrate and CSS.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Zheng Wu, Yang Bai, Yibo Zhang, Minwei Xie, Tao Huang, Shunsheng Yang, Daoping Peng
Summary: A novel strategy of iron and nitrogen co-doped biochar (Fe-N-BC) activated peroxydisulfate (PDS) was developed to improve anaerobically digested sludge (ADS) dewaterability. The Fe-N-BC-800/PDS treatment significantly reduced the Capillary suction time (CST) and moisture content (MC) of the ADS, indicating enhanced dewatering efficiency. Quantitative analysis revealed that oxidative reactions facilitated by Fe-N2-BC-800 played a crucial role in improving the dewaterability of ADS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Kaarmukhilnilavan R. Srinivasan, J. W. C. Wong, Kumarasamy Murugesan
Summary: The bacterial strain Klebsiella pneumoniae UKD24, isolated from a domestic sewage treatment plant, showed remarkable flocculation rates. Fish waste extract enhanced the productivity of the bioflocculant, and optimal conditions for production were determined. The bioflocculant exhibited significant removal efficiency for Cr(VI) in wastewater.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Kannayiram Muthukumaravel, Marckasagayam Priyadharshini, Venkatachalam Kanagavalli, Natarajan Vasanthi, Munawar Suhail Ahmed, Mohamed Saiyad Musthafa, Saurabh Shukla, Ramsha Khan, Rajinikanth Rajagopal, Soon Woong Chang, Balasubramani Ravindran
Summary: Phenol, a common aromatic chemical found in domestic and industrial effluents, adversely affects the indigenous biota and has long-lasting toxic effects on the aquatic ecosystem. This study observed the response of Labeo rohita to sublethal concentrations of phenol, resulting in a decrease in biochemical constituents and hematological parameters in the fish.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Environmental Sciences
B. Sowmiya Rajalakshmi, A. Annes Silva Fathima, B. Sunitha Jasmine, M. Vasanthy, C. Thamarai Selvi, Rajinikanth Rajagopal, Ramsha Khan, Ashraf Atef Hatamleh, Bassam Khalid Alnafisi, Mansour K. Gatasheh, Soon Woong Chang, Balasubramani Ravindran
Summary: The goal of this study was to develop an efficient method for treating cheese production wastewater. The indigenous microbial treatment process was used to effectively remove total dissolved solids, chemical oxygen demand, and color without adding any nutrients. Among the different microbes tested, Enterobacter cloacae showed the highest removal efficiency for TDS and COD. The study suggests that microbial therapies are effective and environmentally beneficial.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Review
Agricultural Engineering
Shraddha Chavan, Bhoomika Yadav, R. D. Tyagi, Jonathan W. C. Wong, Patrick Drogui
Summary: Kitchen waste is a readily available and low-cost source of organic material that can be used for bioplastic synthesis. Various pre-treatments are being studied to enhance the release of fermentable sugars during its hydrolysis. This review provides a comprehensive summary of the research developments in utilizing kitchen waste for PHA synthesis and discusses the challenges and prospects for industrially producing sustainable PHAs.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mayur B. Kurade, Ghulam Mustafa, Muhammad Tariq Zahid, Mukesh Kumar Awasthi, Mital Chakankar, Katrin Pollmann, Moonis Ali Khan, Young Kwon Park, Soon Woong Chang, Woojin Chung, Byong-Hun Jeon
Summary: This study demonstrates a novel approach of integrated phycoremediation and ultrasonication-irradiation treatment (iPUT) used for improving the degradation of sulfonamide antibiotics via a cumulative effect of combined treatments. Ultrasonication treatment had different effects on microalgae growth depending on whether it was a single treatment (SUT) or multiple-intermittent treatments (IUT). The removal of sulfonamide antibiotics was significantly improved by both SUT and IUT, with IUT showing a higher removal rate.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Public, Environmental & Occupational Health
Sam S. S. Lau, Sharron S. K. Leung, Jonathan W. C. Wong, Terence C. P. Lee, Stephen R. R. Cartwright, Janet T. C. Wong, Jackie Man, Ethan Cheung, Regene P. W. Choi
Summary: The COVID-19 pandemic negatively affects university students' mental wellbeing. This study explores the effectiveness of a 3-week virtual nature contact in improving nature connectedness and reducing stress. The findings demonstrate that virtual nature interventions increase happiness, comfort, relaxation, and nature connectedness among university students.
FRONTIERS IN PUBLIC HEALTH
(2023)
Review
Environmental Sciences
M. K. Manu, Liwen Luo, Reeti Kumar, Davidraj Johnravindar, Dongyi Li, Sunita Varjani, Jun Zhao, Jonathan Wong
Summary: Anaerobic digestion (AD) is a promising technology for diverting organic waste and producing clean energy. However, it is susceptible to external factors such as microplastic and chemical pollutants. This review assesses the impact of microplastic pollution on the AD process, including the pathways of microplastic entry, the effects of different types and concentrations of microplastics, and the risks to microbial communities and antibiotic resistance genes.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Debkumar Chakraborty, Sankar Ganesh Palani, Makarand M. Ghangrekar, Jonathan W. C. Wong
Summary: The present study focused on extracting lactic and acetic acids from leachate using the reactive extraction (RE) process. Various diluents were screened and Aliquat 336-Butyl acetate/MIBK extractants in RE demonstrated higher distribution coefficients and extraction yield than physical extraction (PE). The response surface methodology (RSM) optimized the extraction conditions, achieving high extraction efficiencies for lactate and acetate.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Agricultural Engineering
Jinman Cao, Guilan Duan, Aijun Lin, Yaoyu Zhou, Siming You, Jonathan W. C. Wong, Guang Yang
Summary: This study investigated the inhibitory mechanisms of Cu2+ on fermentative hydrogen production by metagenomics sequencing. Results showed that exposure to Cu2+ reduced the abundances of high-yielding hydrogen-producing genera and down-regulated genes involved in substrate membrane transport, glycolysis, and hydrogen formation, leading to significant inhibition on the process performances.
BIORESOURCE TECHNOLOGY
(2023)
Review
Agricultural Engineering
Sivasubramanian Manikandan, Sundaram Vickram, Ramasamy Subbaiya, Natchimuthu Karmegam, Soon Woong Chang, Balasubramani Ravindran, Mukesh Kumar Awasthi
Summary: The suitability of biochar as an environmental restoration supplement varies significantly depending on the feedstocks and pyrolysis conditions used. This study comprehensively examines the potential benefits of biochar in increasing crop yields, improving nutrient availability, supporting composting, water restoration, and enhancing overall usage efficiency. It also highlights the need for further research and proposes potential directions for exploration.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Rajat Kumar, Dongyi Li, Liwen Luo, M. K. Manu, Jun Zhao, Rajeshwar D. Tyagi, Jonathan W. C. Wong
Summary: Microbiological polyhydroxyalkanoates (PHAs) have great potential as bio-replacements for synthetic polymers. The inherent properties of PHAs expand their applicability in various industries, environments, and clinical sectors. Through omics mining approaches, a new environmental-friendly, endotoxin-free gram-positive bacterium, Bacillus cereus IBA1, was identified as a promising PHA producer. By using a nutrient-enriched strategy, the concentration of PHA granules was increased by 2.3 folds to 2.78 +/- 0.19 g/L. This study also confirmed the growth-dependent PHA biogenesis through exploring PHA granule-associated operons and their constituent genes. The feasibility of this microbial phenomenon could contribute to the development of next-generation biopolymers and increase the industrial applicability of PHAs, thus promoting sustainable development.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Yumin Duan, Mukesh Kumar Awasthi, Jianfeng Yang, Yuan Tian, Huike Li, Shan Cao, Asad Syed, Meenakshi Verma, Balasubramani Ravindran
Summary: This study tracked the dynamic changes of bacterial communities in the process of biochar-driven sheep manure composting and established co-occurrence networks with keystone taxa. The succession of bacterial community varied noticeably during composting, with Proteobacteria predominant in the initial stage, Firmicutes in the thermophilic and mesophilic stages, and Bacteroidota dominant in the maturation stage. The visualizations of bacterial co-occurrence networks showed more cooperative mutualism and complex interactions in the thermophilic and mesophilic phases. Notably, composts amended with 7.5% and 10% biochar exhibited the highest connections and positive cooperation among bacterial communities.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Ghulam Mustafa, Muhammad Tariq Zahid, Mayur Bharat Kurade, Swapnil Mahadeo Patil, Farah Rauf Shakoori, Zeeshan Shafiq, Sidra Ihsan, Yongtae Ahn, Azmat Ali Khan, Amel Gacem, Byong-hun Jeon
Summary: This study successfully overexpressed the AzK gene in Escherichia coli for the efficient degradation of Remazol Red-R and Acid-Blue 29 dyes. Optimal conditions were determined as 1.5% inoculum size, 0.5 mM IPTG concentration, and 6 hours incubation time. The crude extract achieved 76% and 74% decolorization of RRR and AB-29, while the purified enzyme achieved 94% and 93% decolorization within 0.3 hours. Kinetic analysis revealed the enzymatic characteristics and HPLC and GC-MS analyses confirmed the effective biotransformation of dyes into less toxic metabolites. This study highlights the potential of recombinant azoreductase for the degradation of textile azo dyes.
ENVIRONMENTAL POLLUTION
(2023)
Article
Education, Scientific Disciplines
Xiaoli Zhou, Hesham S. Almoallim, Balasubramani Ravindran, Rui Qin
Summary: Citrollenol has the potential to treat AD in a rat model by improving memory, reducing inflammation, and enhancing antioxidant capacity.
INDIAN JOURNAL OF PHARMACEUTICAL EDUCATION AND RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Uday Shashikumar, Somi Joshi, Ananya Srivastava, Pei-Chien Tsai, Kandkuri Dhana Sai Shree, Meera Suresh, Balasubramani Ravindran, Chaudhery Mustansar Hussain, Shashi Chawla, Liang-Yin Ke, Vinoth Kumar Ponnusamy
Summary: Biomolecule-associated metal-organic frameworks (Bio-MOFs) are a novel class of materials that form coordination bonds with metal ions, offering versatile applications. Despite some challenges, Bio-MOFs have been commercialized in industries such as sensors, food, pharma, and eco-sensing.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(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)
