Article
Energy & Fuels
Reza Peighami, Behnam Rasekh, Ehsan Motamedian, Fatemeh Yazdian, Hanif Khodaverdi
Summary: Biological methods using Sulfur Oxidizing Bacteria (SOB) were developed to remove sulfide from streams. Among seven well-known SOBs investigated, T. versutus and T. aerophilum were selected for their capability. While T. aerophilum only produced sulfate, T. versutus showed potential for elemental sulfur production under oxygen restriction conditions. Optimization experiments determined that a sulfide concentration of 10000 mg/L and a stirrer speed of 130 rpm resulted in the production of 1600 mg/L of elemental sulfur, converting 40% of the incoming sulfide.
Article
Environmental Sciences
Xiaoling Ma, Hongbin Tan, Xuemei Su, Xiong Hou, Faqin Dong, Feihua Yang
Summary: Red gypsum, a byproduct of the sulfate method in TiO2 production, is currently treated by outdoor stacking, which incurs additional costs and environmental concerns. This study investigates the transformation of red gypsum for the cyclic utilization of elemental sulfur and calcium in acidic liquid stream treatment.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2022)
Article
Engineering, Environmental
Jianyou Long, Yijie Zheng, Shuxiang Zha, Juanxi Huang, Dan Peng, Gaosheng Zhang, Tangfu Xiao, Yuxian Liu, Guoliang Yang, Huosheng Li
Summary: This study investigates the removal of hexavalent chromium (Cr(VI)) using sulfidated zero-valent manganese (SZVMn), which is synthesized by combining zero-valent manganese and sulfide. The optimal [S/Mn] ratio of 0.1 achieves the highest Cr(VI) removal capacity of 190.8 mg/g. SZVMn outperforms bare zero-valent manganese in terms of preservation and resistance to coexisting ions. The removal of Cr(VI) occurs through the rapid reduction of Cr(VI) to Cr(III) via Mn0 and MnSx, followed by slow reduction via dissolved/surface-bound Mn2+ and precipitation of Cr(III) as Cr(OH)3.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Hongbin Tan, Min Ye, Xuemei Su, Xiaoling Ma, Faqin Dong, Feihua Yang
Summary: This study mainly investigated the effects of calcining temperature and time on the preparation of calcium sulfide from gypsum. It was found that gypsum could be completely decomposed into calcium sulfide by calcining at 900 degrees C for 30 min. Furthermore, the reaction between CaS and CO2 was observed to generate hydrogen sulfide, which could be oxidized to elemental sulfur.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Environmental Sciences
F. Almenglo, J. J. Gonzalez-Cortes, M. Ramirez, D. Cantero
Summary: Recovering energy from biogas is crucial for reducing greenhouse gas emissions and our dependence on fossil fuels. Eliminating H2S is a priority to prevent equipment corrosion and SO2 emissions. This review discusses advances in anoxic desulfurization using fixed biomass bioreactors and suspended growth bioreactors, achieving high removal efficiencies. Nitrate and nitrite have been successfully used as electron acceptor, and microbial diversity plays a crucial role. Future trends include improving gas-liquid mass transfer and exploring cost-effective reagents.
Article
Multidisciplinary Sciences
Jianguo Ni, Huayun Yang, Liqing Chen, Jiadong Xu, Liangwei Zheng, Guojian Xie, Chenjia Shen, Weidong Li, Qi Liu
Summary: This study used metagenomic analysis to investigate the differences in microbial community structures and functions in biofilters before and after treatment with odorous gases. The results showed that odorous gases can alter the microbial community structure in the biofilter. The improved biofilter had dominant phyla such as Proteobacteria, Planctomycetes, and Chloroflexi, and dominant genera such as Thioalkalivibrio, Thauera, and Pseudomonas. Several metabolic pathways related to xenobiotic biodegradation showed significant changes during the treatment process. The findings suggest that certain phyla and genes play important roles in nitrogen-fixing and removing odorous gases in the biofilter.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Po-Lin Liao, Nicolaus Mahasti, Laurencia Wiryana Effendi, Yao-Hui Huang
Summary: In this study, fluidized-bed homogeneous crystallization (FBHC) was used to treat sulfide-containing wastewater. The operating parameters were optimized to achieve high removal of sulfur and nickel, resulting in high sulfur removal efficiency and crystallization ratio.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Annemerel R. Mol, Lourens J. van Langeveld, Renata D. van der Weijden, Johannes B. M. Klok, Cees J. N. Buisman
Summary: The effect of polysulfide formation on biologically produced elemental sulfur crystals was investigated, showing that polysulfides formed in the AnSuR reactor improved settleability of S8 particles. Anoxic, abiotic experiments revealed that sulfur particles became coarser and more porous, with smaller particles disappearing and agglomerates initially breaking apart but later reforming. Different observed polysulfide formation rates for each S8 sample were found to be related to the initial morphology and size. Increasing HS--S8 ratio and retention time were shown to increase settleability of S8 particles.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
E. G. Saad, T. M. Zewail, A. A. Zatout, E. -S. Z. El-Ashtoukhy, M. H. Abdel-Aziz
Summary: In this study, a two-compartment galvanic cell was tested using two types of cation exchange membranes to treat sulfide waste and recover elemental sulfur. The optimal conditions for highest performance were determined through investigating various parameters, leading to high selectivity in sulfide removal and sulfur recovery with minimal interference with other contaminants.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Environmental
Yang-Fan Deng, Di Wu, Hao Huang, Yan-Xiang Cui, Mark C. M. van Loosdrecht, Guang-Hao Chen
Summary: A sulfide-driven partial denitrification and anammox (SPDA) process was developed and operated continuously with stable performance for 392 days, achieving 80% nitrogen removal efficiency. Sulfide had inhibitory effects on anammox activity, but rapid oxidation by sulfur-oxidizing bacteria relieved these effects. High-throughput sequencing identified Thiobacillus and Sulfurimonas as dominant SOB genera, and Candidatus Kuenenia as the dominant anammox bacteria in the SPDA system, laying the foundation for future practical applications.
Review
Environmental Sciences
Manoj Kumar, Moumita Nandi, Kannan Pakshirajan
Summary: Biological sulfide precipitation by sulfate reducing bacteria is an emerging technique for the recovery of heavy metals from metal contaminated wastewater, offering advantages such as low capital cost, ability to form highly insoluble salts, and capability to remove and recover heavy metals even at very low concentrations. The recovered metal sulfide nanoparticles can be applied in various fields, serving as an incentive for industries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Chunshuang Liu, Yanzhe Li, Jianing Gai, Hongzhe Niu, Dongfeng Zhao, Aijie Wang, Duu-Jong Lee
Summary: In this study, a sulfur partial denitrification (SPD) granular sludge was cultivated in an upflow anaerobic sludge bed (UASB) reactor, achieving maximum nitrate-to-nitrite transformation ratio and NO3--N reduction rate much higher than literature results. The mature granules had a stable structure with enriched Thiobacillus genus, facilitating efficient partial nitrification reactions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Dong Wei, Li Liu, Jiping Shi, Weizhi Yan, Xiaojia Chen, Xiang Li
Summary: This study isolated a novel heterotrophic Pseudomonas strain, PSP1, from biogas slurry and investigated its biodesulfurization ability for H2S removal. The optimal culture conditions were determined as 30 degrees C and 200 rpm. PSP1 was found to convert thiosulfate to sulfane for desulfurization, although the efficiency was relatively weak with a significant amount of thiosulfate converted into soluble tetrathionate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Agricultural Engineering
Camila Olivera, Maria Laura Tondo, Valentina Girardi, Lucia Fattobene, Maria Sol Herrero, Leonardo Martin Perez, Lucas Matias Salvatierra
Summary: This study investigated the early-stage response of six lab-scale biogas bioreactors fed with different amounts of a sulfaterich organic agro-industrial effluent. The results showed that the yield of hydrogen sulfide (H2S) transitioned from transient to steady state within 2 weeks for all conditions. Additionally, volatile sulfur compounds (VSCs) such as methanethiol (MeSH) and dimethyl sulfide (DMS) were generated at high sulfate loads. Changes were observed in the microbial community structures, with a higher abundance of genes involved in the dissimilatory sulfate-reduction pathway in high loaded sulfate bioreactors. Principal component analysis (PCA) and correlation analyses revealed strong relationships between H2S, VSCs, and the microbial community.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Lianghan Geng, Hong Yang, Xiaotong Wang, Xuyan Liu, Jiawei Wang, Yang Su
Summary: In this study, the effects of different concentrations of Na2SO3 on the ANAMMOX system and microbial community were investigated. The addition of Na2SO3 resulted in inhibition of AnAOB and reduction in denitrification performance. However, the ANAMMOX system could be restored to normal by immediately removing Na2SO3 and reducing nitrogen load. High-throughput sequencing analysis showed significant changes in the microbial community. This study contributes to a better understanding of the environmental factors regulating the ANAMMOX process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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)