Article
Chemistry, Medicinal
Diana del Rosario-Santana, Rafael R. Robaina, Pilar Garcia-Jimenez
Summary: The synthesis of cell-wall sulfated galactans and ethylene in red seaweed is influenced by UDP galactose, sulfate transporters, and S-adenosyl methionine. Methionine increases the transcript number of genes encoding S-transporters and assimilation, while reducing the transcript levels of PGM and GALT. However, it does not affect the transcript number of carbohydrate sulfotransferase and galactose-6-sulfurylase.
Article
Green & Sustainable Science & Technology
Tripti Singh, Anisha Sehgal, Rajeev Singh, Shalini Sharma, Dan Bahadur Pal, Hanaa M. Tashkandi, Rajaa Raddadi, Steve Harakeh, Shafiul Haque, Manish Srivastava, Ashraf Aly Hassan, Neha Srivastava, Vijai Kumar Gupta
Summary: Fossil fuels are limited and environmentally unfriendly, making them insufficient to meet the rising energy needs. Therefore, finding alternative energy sources that can counteract the drawbacks of fossil fuels is urgent. Biohydrogen, particularly from algae, has attracted significant interest due to its low environmental impact and various sustainable production methods. However, challenges such as low yield, limited light penetration, low biomass concentration, and expensive downstream processes hinder the sustainable and commercial application of algae-based biohydrogen production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Review
Agricultural Engineering
Deen Dayal Giri, Himanshu Dwivedi, Abdulmohsen Khalaf D. Alsukaibi, Dan Bahadur Pal, Ahmed Al Otaibi, Mohammed Y. Areeshi, Shafiul Haque, Vijai Kumar Gupta
Summary: Microbes that recycle nutrients and detoxify ecosystems have the potential to meet future energy needs by producing biohydrogen through the collaboration of autotrophic and heterotrophic microbes. The production of hydrogen in granules involves mutual exchange of nutrients and electrons among microbes. The development of granular algae-bacteria consortia, optimization of hydrogen yield in coculture, investigation of key enzymes, and potential engineering strategies for enhanced hydrogen production are all important aspects discussed in this review.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Physical
Jianlong Wang, Yanan Yin
Summary: Clostridium species play a significant role in dark fermentative hydrogen production, with high hydrogen yield and wide substrate range, although efforts are still needed to ensure efficient and stable operation of the system and economic applicability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Medicinal
Mohamed Shaaban, Ghada S. E. Abou-El-Wafa, Christopher Golz, Hartmut Laatsch
Summary: Analysis of the air-dried marine red alga Laurencia papillosa collected near Ras-Bakr at the Suez gulf in Egypt resulted in the discovery of five new halogenated terpene derivatives and their antimicrobial activities were studied.
Article
Biotechnology & Applied Microbiology
Dake Xiong, Thomas Happe, Ben Hankamer, Ian L. Ross
Summary: Researchers successfully fused ferredoxin with hydrogenase and expressed it in the nucleus by mutation, significantly increasing hydrogen production, likely reducing losses to other electron acceptors.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Review
Engineering, Environmental
Monika Sharma, El-Sayed Salama, Nandini Thakur, Hisham Alghamdi, Byong-Hun Jeon, Xiangkai Li
Summary: Availability of biomass makes biofuel from bioresources more feasible. Recently, algal biomass and lignocellulosic biomass have been widely used in bioelectrochemical systems for bioelectricity and biohydrogen production. However, there is a lack of comprehensive reviews on this topic. This review provides an in-depth understanding of biomass-specific bioelectrochemical systems, including biomass selection, pretreatment approaches, dominating microbes, economic feasibility, and pilot-scale up.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Anjana Pandey, Pallavi Sinha, Ashutosh Pandey
Summary: In this study, the potential of Spirulina platensis hydrolysate as a substrate for biohydrogen production through sequential fermentative and photofermentative processes was evaluated. Response Surface Methodology was used to determine the optimal photofermentation conditions. The experiments showed that factors such as pH, dilution fold of fermentate, and Fe(II) sulfate concentration significantly affected hydrogen production, with promising results obtained under specific conditions in the second stage experiment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Changman Kim, Isaac Wolf, Chang Dou, Lauren Magnusson, Pin-Ching Maness, Katherine J. Chou, Steven Singer, Eric Sundstrom
Summary: The study found that nitrogen sparging at low flow rates increases hydrogen production, but high rates of nitrogen sparging inhibit cell growth and hydrogen production. Additionally, supplementing CO2 to the sparging gas can address the stripping of inorganic carbon and co-optimizing the gas flow rate and CO2 fraction further enhances hydrogen production.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Feifei Zhang, Kan Zhang, Xing-You Xian, Hai-Qi Chen, Xiao-Wei Chen, Zhiqian Zhang, Yi-Rui Wu
Summary: By determining the Leloir pathway in strain WK and co-expressing the genes galK and galT, carbon catabolite repression (CCR) was eliminated and galactose utilization for butanol production was significantly enhanced. The gene-modified strain WK-Gal-4 effectively co-utilized galactose and glucose using a pretreated red algal hydrolysate as the substrate, resulting in optimal sugar consumption and butanol production, with increments of 62.35% and 61.49% over strain WK, respectively. This work provides a feasible approach to utilizing red algal biomass for butanol fermentation and offers a novel route for the future development of cost-effective and sustainable marine biorefinery.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biotechnology & Applied Microbiology
Sayaka Kominami, Hiroyuki Mizuta, Toshiki Uji
Summary: This study investigated the daily changes in gene expression of Neopyropia yezoensis, a major cultivated seaweed, during light/dark treatments. The results showed that genes associated with carbon-nitrogen assimilations, fatty acid synthesis, and starch synthesis were highly expressed in the morning, while a subset of genes related to the pentose phosphate pathway, cell cycle, and DNA replication were upregulated in the evening. Additionally, genes involved in asparagine catabolism and tricarboxylic acid cycle were highly expressed at dusk, suggesting their role in nitrogen and carbon supply during the dark. Furthermore, genes encoding cryptochrome/photolyase family and histone modification proteins were identified as potential regulators of diurnal rhythmic genes.
MARINE BIOTECHNOLOGY
(2022)
Article
Agricultural Engineering
Weiming Li, Lihui Lu, Chi Cheng, Nanqi Ren, Shang-Tian Yang, Meng Liu
Summary: This study investigates the relationship between substrate reduction degree and hydrogen production performance by fermenting mannitol and mannitol-rich seaweed. The results show that higher reduction degree substrates yield higher hydrogen production and demonstrate the great application potential of brown algae fermentation for the co-production of hydrogen and butyrate.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Ju-Hyeong Jung, Young-Bo Sim, Jong-Hyun Baik, Jong-Hun Park, Saint Moon Kim, Jisu Yang, Sang-Hyoun Kim
Summary: The study found that heat-treated and frozen H2-producing granular sludge showed higher H2 yield and production rate compared to heat-treated methanogenic sludge in mixed-culture dark fermentative H2 production. Inoculation after centrifugation method demonstrated better H2 production performance. Homoacetogenesis was identified as a major H2-consuming pathway, and the abundance of Clostridium showed a linear relationship with H2 production rate and lag-phase time.
BIORESOURCE TECHNOLOGY
(2021)
Review
Energy & Fuels
S. K. Mandotra, Chitra Sharma, N. Srivastava, A. S. Ahluwalia, P. W. Ramteke
Summary: Biohydrogen production from algae holds promise as a clean and sustainable fuel, but faces obstacles such as cost effectiveness, storage, and transportation.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Agricultural Engineering
Lei Chen, Ke Zhang, Mingpeng Wang, Zhaojie Zhang, Yujie Feng
Summary: The study found that a magnetic field intensity of 3.2 mT effectively enhanced hydrogen production, leading to significantly higher hydrogen yield and production rate. Compared to the control group, the maximum biomass, carbon conversion efficiency, and energy conversion efficiency were also increased to varying degrees.
BIORESOURCE TECHNOLOGY
(2021)
Article
Plant Sciences
Aswathy Udayan, Ashutosh Kumar Pandey, Ranjna Sirohi, Nidhin Sreekumar, Byoung-In Sang, Sung Jun Sim, Sang Hyoun Kim, Ashok Pandey
Summary: In the current global scenario, the world is facing challenges due to population growth, industrialization, and urbanization. This has led to an increased demand for nutrients and renewable energy sources. Microalgae are considered a promising candidate for high-value metabolites and alternative energy sources. However, current cultivation systems for microalgae do not offer feasibility in terms of technology, economics, energy, and environmental sustainability.
PHYTOCHEMISTRY REVIEWS
(2023)
Article
Engineering, Environmental
Choe Earn Choong, So Yeon Yoon, Minhee Kim, Gooyong Lee, Sang-Hyoun Kim, Byong-Hun Jeon, Jaeyoung Choi, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: Hydrophobic sulfur (S) core-shell-layered nano-zero-valent iron (Fe) (S-nZVI) was prepared for NO3- reduction using a post-sulfidation method with varying Fe/S mass ratios. S(0.125)ZVI (Fe/S = 0.125) showed good N-O cleavage properties due to high electron transfer efficiency and low surface passivation. It exhibited higher selectivity of NO3- reduction toward N-2 than sole nZVI in synthetic and actual NO3- groundwater.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Tirath Raj, Raj Morya, K. Chandrasekhar, Deepak Kumar, Shveta Soam, Ravindra Kumar, Anil Kumar Patel, Sang-Hyoun Kim
Summary: Microalgae can convert CO2 into carbohydrates, lipids, and proteins, which can be transformed into renewable energy, chemicals, and materials. However, the difficult-to-degrade cell wall and lack of environmentally friendly pretreatment methods hinder the commercialization of microalgal biorefineries. This article discusses the chemical structure and rigidity of microalgae, and summarizes traditional pretreatment methods. Green solvents like ionic liquids, deep eutectic solvents, and natural deep eutectic solvents show promise in selectively extracting components from microalgae. Further research is needed for the deployment of carbon-neutral technologies, including the design of task-specific solvents, understanding their structural activity, and assessing their environmental toxicity and recyclability. Additionally, integrating microalgal industry with biorefineries can improve waste management, sustainability, and revenue.
BIORESOURCE TECHNOLOGY
(2023)
Review
Agricultural Engineering
Ashutosh Kumar Pandey, Jungsu Park, Jeun Ko, Hwan-Hong Joo, Tirath Raj, Lalit Kumar Singh, Noopur Singh, Sang-Hyoun Kim
Summary: Hydrogen can be produced in an environmentally friendly manner using various organic waste and biomass as feedstock. However, the complexity of biological processes limits their predictability and reliability, hindering scale-up and dissemination. This article reviews the use of machine learning in biohydrogen production technology, which has shown promise in modeling and predicting process performance and microbial population dynamics. Further research on machine learning is needed for designing process control tools and understanding the connection between process performance and microbial populations.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Saint Moon Kim, Young -Bo Sim, Jong-Hyun Baik, Jisu Yang, Ashutosh Kumar Pandey, Hwan-Hong Joo, Ju-Hyeong Jung, Sang-Hyoun Kim
Summary: This study achieved high-rate continuous biohydrogen production by forming H2-producing granules in a pilot-scale dynamic membrane bioreactor. The granules improved hydrogen production rate and yield by altering metabolic flux distribution. The low-cost polyester mesh acted as a carrier for granule formation, and the porous structure of the granules facilitated substrate transfer.
CHEMICAL ENGINEERING JOURNAL
(2023)
Editorial Material
Agricultural Engineering
Thallada Bhaskar, S. Venkata Mohan, Siming You, Sang-Hyoun Kim, Luciana Porto de Souza Vandenberghe
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Ashutosh Kumar Pandey, Jungsu Park, Alice Muhorakeye, Raj Morya, Sang-Hyoun Kim
Summary: This study aimed to predict VFAs production from SDBS-pretreated WAS. A lab-scale continuous experiment was conducted at varying HRTs. The highest VFA yield was achieved at an HRT of 2 d, where hydrolysis and acidogenesis showed the highest microbial activities. The ANN model demonstrated high efficiency in learning the relationship between input variables and reactor performance, with satisfactory prediction outcomes.
BIORESOURCE TECHNOLOGY
(2023)
Review
Energy & Fuels
Gayathri Priya Iragavarapu, Syed Shahed Imam, Omprakash Sarkar, Srinivasula Venkata Mohan, Young-Cheol Chang, Motakatla Venkateswar Reddy, Sang-Hyoun Kim, Naresh Kumar Amradi
Summary: To meet the growing energy needs and address the depletion of fossil resources, there is a need to shift from fossil-based feedstocks to organic waste for a competitive, resource-efficient, and low-carbon sustainable economy. Chemical routes for fuel and chemical production have low production costs, but the use of toxic and expensive catalysts make the process unsustainable. Utilizing renewable resources for bioprocessing with a multi-product approach improves resource utilization and contributes to the green economy.
Article
Energy & Fuels
Do-Hyung Kim, Beom-Jung Kang, Sang-Hyoun Kim, Jeong-Hoon Park, Jeong-Jun Yoon
Summary: Adding magnetite (Fe3O4) can reduce the by-products generated from acid hydrolysis of biomass and enhance hydrogen production. This study extracted sugars from Gelidium amansii through acid hydrolysis and evaluated hydrogen production with magnetite supplementation. The addition of magnetite at a concentration of 1.3 g/L or lower increased hydrogen production by 11.4% on average, especially for the main by-product, 5-hydroxymethylfurfural (5-HMF). This strategy could optimize biohydrogen production using Gelidium amansii and reduce detoxification costs.
Article
Biotechnology & Applied Microbiology
Sang Hyun Kim, Hyun Joong Kim, Su Hyun Kim, Hee Ju Jung, Byungchan Kim, Do-Hyun Cho, Jong-Min Jeon, Jeong-Jun Yoon, Sang-Hyoun Kim, Jeong-Hoon Park, Shashi Kant Bhatia, Yung -Hun Yang
Summary: This study identified genes associated with carbon source utilization, electron transfer systems, and hydrogen production systems in Shewanella marisflavi BBL25 through whole-genome sequencing. In addition, introducing the glk gene from S. marisflavi BBL25 into S. oneidensis MR-1 improved glucose consumption. The findings contribute to the understanding of sugar utilization, electron transfer systems, and hydrogen production systems in other Shewanella species.
JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Ranjna Sirohi, V. Vivekanand, Ashutosh Kumar Pandey, Ayon Tarafdar, Mukesh Kumar Awasthi, Amita Shakya, Sang Hyoun Kim, Sang Jun Sim, Hoang A. Tuan, Ashok Pandey
Summary: The transition from fossil fuels to non-conventional sources is necessary for addressing the global energy crisis and environmental issues. Organic waste from various industries can be utilized to produce gaseous fuels through different biochemical strategies. However, current biogas and biohydrogen production practices are inefficient and require interventions to improve biofuel yield. Adding biochar has been shown to enhance gaseous fuel production by adsorbing inhibitors and activating gas-producing microorganisms. This review explores the effect of biochar on gaseous biofuel production and highlights the need for a circular bioeconomy approach.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Agricultural Engineering
Yeelyung Kwon, Jungsu Park, Gi-Beom Kim, Yura Jo, Soyoung Park, Sang-Hyoun Kim
Summary: This study investigates the effects of sludge compositions and organic loading rates (OLRs) on stable biogas production during sludge digestion. The highest average methane production rate of 0.7 L/L & BULL;d is achieved when the OLR, hydraulic retention time, WAS volume fraction, and FOS/TAC ratio are 5.0 g COD/L & BULL;d, 12 days, 0.75, and 0.32, respectively. An increase in OLR promotes bacterial and archaeal abundance and specific methanogenic activity. These results can be applied to the design and operation of sludge digestion for stable, high-rate biogas recovery.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jungsu Park, Roent Dune A. Cayetano, Yeelyung Kwon, Gi-Beom Kim, Yura Jo, Sang-Hyoun Kim
Summary: This study investigated the application of dynamic membrane and alkaline-thermal pretreatment for sludge digestion with a low hydraulic retention time. The results showed that the pretreatment effectively increased methane production and the abundance of methanogenic archaea, while the dynamic membrane enabled stable sludge digestion. Furthermore, the pretreatment was found to promote the growth of hydrolytic bacteria.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Sang Hyun Kim, Jeong Hyeon Hwang, Hyun Joong Kim, Suk Jin Oh, Hyun Jin Kim, Nara Shin, Sang-Hyoun Kim, Jeong-Hoon Park, Shashi Kant Bhatia, Yung-Hun Yang
Summary: The study developed Clostridium acetobutylicum as a superior biohydrogen producer by introducing glyceraldehyde-3-phosphate dehydrogenase (GAPDH) to enhance hydrogen production. The strain CAC824-G containing gapC showed a 66.3% higher hydrogen production than the wild-type strain, with increased NADH and NADPH pools. Overexpression of gapC resulted in increased hydrogen production even in the presence of inhibitors.
ENZYME AND MICROBIAL TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Raj Morya, Fanirintsoa Herivonona Andrianantenaina, Saurabh Singh, Ashutosh Kumar Pandey, Gi-Beom Kim, Jay Prakash Verma, Gopalakrishnan Kumar, Tirath Raj, Sang-Hyoun Kim
Summary: Due to the high demand for rice as a main food crop, the disposal of rice straw becomes a significant waste management issue in rice-producing countries. Open burning is the most common method but it causes environmental problems. However, utilizing rice straw as a raw material for valuable products can be advantageous. This review highlights the use of rice straw as a crucial source of clean energy.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(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)