Article
Biotechnology & Applied Microbiology
Tayna Diniz Frederico, Ivan Nancucheo, Werica Colaco Barros Santos, Renato Renison Moreira Oliveira, Daniella Cardoso Buzzi, Eder Soares Pires, Patricia Magalhaes Pereira Silva, Adriano Reis Lucheta, Joner Oliveira Alves, Guilherme Correa de Oliveira, Jose Augusto Pires Bitencourt
Summary: Sulfate-reducing bioreactors were used to treat acid mine drainage in this study. Two separate bioreactors with pH and temperature control were operated using different acidophilic microbial consortia to remove sulfate from synthetic acidic mine water. Both bioreactors showed similar performance in sulfate removal and contained Desulfosporosinus as the main sulfate-reducing bacteria.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Review
Engineering, Multidisciplinary
Ifeanyi Michael Smarte Anekwe, Yusuf Makarfi Isa
Summary: Pollution, especially acid mine drainage (AMD) caused by anthropogenic and industrial activities, is a major threat to the ecosystem. This study critically reviews various bioremediation methods for AMD contamination treatment and discusses their challenges and prospects. The research shows that bioremediation has proven effective and environmentally friendly, but large-scale application remains a challenge.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Review
Environmental Sciences
Tianhao Du, Anna Bogush, Ondrej Masek, Saul Purton, Luiza C. Campos
Summary: Acid mine drainage (AMD) is a global issue that causes harmful environmental impacts. This study reviewed three bio-based treatment methods using algae, biochar, and bacteria that can be used separately and potentially in combination for effective and sustainable AMD treatment. The review found that all bio-based methods, when applied as a single process and in combination, were effective treatments for AMD and were influenced by various parameters. However, there is a lack of research on the combination of algae-biochar-bacteria as a consortium for AMD treatment.
Article
Engineering, Environmental
Haixia Wang, Mingliang Zhang, Junbing Xue, Qi Lv, Jie Yang, Xuemei Han
Summary: The study demonstrated that the multi-stage constructed wetland system was highly effective in co-treating high-strength acid mine drainage and domestic wastewater. The different stages of wetland treatment significantly improved effluent pH and removed dissolved metals, sulfate, organic pollutants, and nutrient contaminants. Various types of microorganisms co-existing in this system contributed to the successful remediation process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Agricultural Engineering
Youzheng Chai, Ma Bai, Anwei Chen, Jiayi Yuan, Liang Peng, Jihai Shao, Jiachao Zhang, Pufeng Qin, Cheng Peng, Zhirui Zhou
Summary: Using acid mine drainage as a natural catalyst, HMF can be directly produced from lignocellulosic biomass without the need for exogenous catalysts, reducing costs and improving HMF yield. Acid mine drainage can also modify the biomass substrate in the conversion process and be used to prepare functional metal-loaded carbon materials, providing a sustainable solution for the disposal of biomass conversion residue.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Fabienne Battaglia-Brunet, Corinne Casiot, Lidia Fernandez-Rojo, Marina Hery, Pierre Le Pape, Hafida Tris, Guillaume Morin, Solene Touze, Catherine Joulian
Summary: This study tested the feasibility of combining anaerobic sulfate-reducing bioreactor with downstream iron oxidation step to treat arsenic-rich AMD waters, showing efficient precipitation of arsenic and zinc in the anaerobic reactor, with stable bacterial community present. Iron oxidation was efficiently achieved in the subsequent aerobic bioreactor, demonstrating a low-cost treatment approach for removing arsenic, zinc, and iron in AMDs.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Environmental Sciences
Haixia Wang, Mingliang Zhang, Qi Lv, Junbing Xue, Jie Yang, Xuemei Han
Summary: A multi-unit passive treatment system was developed to treat synthetic acid mine drainage (AMD) and domestic sewage using silage fermentation broth as a carbon source. The system effectively removed metals, sulfates, and organic/nutrient pollutants through different treatment processes in each unit. Diverse microbial communities played a significant role in the overall performance of the system.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Jia Yan, Fan Luo, Lingyao Wu, Yinglin Ou, Changchen Gong, Tianwei Hao, Lei Huang, Yongheng Chen, Jianyou Long, Tangfu Xiao, Hongguo Zhang
Summary: In this study, a two-stage AMD treatment system using food waste hydrolysate as a carbon source was established. The results showed that the introduction of food waste hydrolysate was not harmful for sulfate reducers in the upflow anaerobic sludge bed (UASB) and enhanced the decomposition of refractory organic matter in AMD. Moreover, this method efficiently removed metals and metalloids from both AMD and food waste, and improved carbon, sulfur, and nitrogen removal in the UASB.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
K. Sklenickova, M. Pecenka, J. Rihova Ambrozova, S. Abbrent, V. Vlckova, H. Benes, M. Halecky
Summary: The study demonstrates that hydrophilic and fully aliphatic polyurethane foam can serve as a carrier for microorganisms and be biodegraded when the nutrient supply is limited.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Guodong Chai, Dongqi Wang, Yitong Zhang, Hui Wang, Jiake Li, Xiaosheng Jing, Haiyu Meng, Zhe Wang, Yuan Guo, Chunbo Jiang, Huaien Li, Yishan Lin
Summary: This study investigated the effects of external organic substrates on the activity and stability of sulfate-reducing bacteria in acid mine drainage treatment. The results showed that microcosms containing complex organic wastes had a good effect on reducing heavy metals and acidity in acid mine drainage. Crab shell and shrimp shell showed the best removal performance and offered a cost-efficient, stable, and environmentally friendly solution for acid mine drainage treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Energy & Fuels
Hoesuk Yim, Soheil Valizadeh, Sumin Pyo, Seong-Ho Jang, Chang Hyun Ko, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Young-Kwon Park
Summary: This study evaluated the potential of using acid mine drainage sludge (AMDS) as a catalyst for woody sawdust gasification to produce H2-rich gas. The effects of temperature, equivalence ratio, and contact mode on gas yield and H2 selectivity were investigated. The use of AMDS catalyst resulted in higher gas yield and higher H2 and CO2 content compared to non-catalytic cases, due to redox reactions of Fe2O3 within the gasification process. Increasing temperature and equivalence ratio enhanced gas yield and H2 concentration, while the ex situ contact mode showed better results than the in situ case.
Article
Geochemistry & Geophysics
Richard K. Borden, Paul L. Brown, Samantha Sturgess
Summary: The waste rock from the closed Argyle diamond mine has low environmental risks, but the surrounding sedimentary rocks contain black shale beds that are prone to acidification. Water quality has been actively managed and monitored, with nitrate, nickel, magnesium, and sulfate concentrations increasing during the peak waste rock production period. Since the end of open pit mining, nitrate concentrations have declined significantly, nickel concentrations have decreased at acidic waste rock seep locations, and sulfate and magnesium concentrations have remained stable.
APPLIED GEOCHEMISTRY
(2022)
Article
Engineering, Environmental
Shweta Singh, Saswati Chakraborty
Summary: This study proposes an effective passive bioremediation strategy using a horizontal sub-surface flow constructed wetland to treat extremely acidic coal mine drainage from the Northeastern Coalfield in India. The study achieved high removal efficiency of metal ions and sulfate, with the help of acidophilic sulfate-reducing bacteria.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Norapat Pratinthong, Siwat Sangchan, Yothin Chimupala, Pimluck Kijjanapanich
Summary: The study investigated the optimum conditions for sulfate removal from lignite coal mine drainage in Thailand using ettringite precipitation. Results showed that the Al/S ratio and reaction time significantly affected sulfate removal efficiency, while the Ca/S ratio had no significant impact. Under the optimal conditions, high sulfate removal efficiencies were achieved in both Lamphun and Lampang mine drainage, demonstrating the effectiveness of ettringite precipitation in sulfate removal.
Article
Geochemistry & Geophysics
Massimo D'Orazio, Daniela Mauro, Marta Valerio, Cristian Biagioni
Summary: A study of sulfate minerals from the Monte Arsiccio mine in Italy using ICP-MS revealed high concentrations of several elements, some of which are important from an environmental perspective. Dissolution experiments showed that these minerals can significantly decrease solution pH and release major ions like Fe, Al, and K.
Article
Environmental Sciences
Rafael Frederico Fonseca, Marcelo Zaiat
Summary: Anaerobic digestion is a complex biological process used for decomposing organic matter and producing metabolites and biogas. Monitoring system and process understanding are key to improve the performance and stability. This study developed a low-cost electrochemical sensor for monitoring components in wastewater treatment plants.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Chemical
Oscar Daniel Valmana Garcia, Ana Maria Pereira Neto, Mercia Regina Domingues Moretto, Marcelo Zaiat, Gilberto Martins
Summary: Determining the biochemical methane potential (BMP) is a crucial step in studying anaerobic digestion of sugarcane vinasse. However, the impact of different food-to-microorganism ratio on BMP estimation has not been extensively explored. This research optimized the food-to-microorganism ratio to maximize the BMP of mixed origin vinasse and compared it to literature. By increasing vinasse concentration, the BMP of the vinasse was maximized, with a methane conversion efficiency of 95 +/- 2.55% compared to the theoretical BMP.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Williane Vieira Macedo, Jan Struckmann Poulsen, Marcelo Zaiat, Jeppe Lund Nielsen
Summary: By combining protein-SIP technology with metagenomics, this study identified TBBPA-degrading microorganisms and revealed the degradation pathways, providing an important link for optimizing biodegradation.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Sudeshna Saikia, Rachel B. Costa, Arindam Sinharoy, Mirabelle P. Cunha, Marcelo Zaiat, Piet N. L. Lens
Summary: This study compared the effectiveness of adsorption and precipitation for the removal and recovery of gallium, germanium and zinc, with biosorption and bioprecipitation showing high removal and recovery efficiencies for gallium and zinc.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Rodrigo B. Carneiro, Gisele M. Gomes, Marcelo Zaiat, Alvaro J. Santos-Neto
Summary: This study investigates the impact of phase separation on the performance of anaerobic digestion (AD) by operating different configurations of anaerobic fixed bed biofilm reactors. The results show that feeding the effluent stream from the acidogenic reactor to the methanogenic reactor improves system start-up, alkalinity generation, and biomethane production. The COD removal kinetics is also enhanced in the sequential two-phase system. Hydrogenotrophic methanogenesis is the predominant pathway in the methanogenic reactor, while the Methanosaeta-driven acetoclastic pathway predominates in the acidogenic reactor. The higher diversity of bacteria and archaea in the methanogenic reactor indicates a better balance between volatile organic acid degradation and methane generation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Felipe Eng, Lucas Tadeu Fuess, Patricia Bovio-Winkler, Claudia Etchebehere, Isabel Kimiko Sakamoto, Marcelo Zaiat
Summary: This study optimized the production of volatile fatty acids (VFA) through dark fermentation (DF) of sugarcane vinasse. The results showed the highest VFA production at a temperature of 39.6 °C and initial pH of 8.8. Microbial community analysis revealed the presence of specific microbial families associated with VFA production and consumption. This study provides a basis for vinasse management in the carboxylate platform context.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Engineering, Chemical
Lucas Tadeu Fuess, Felipe Eng, Patricia Bovio-Winkler, Claudia Etchebehere, Marcelo Zaiat, Claudio Augusto Oller do Nascimento
Summary: This study assessed the microbial distribution and methane-producing potential of biomass from different regions in fixed-film reactors. It found that adjusting the food-to-microorganism ratio can increase methane production rates. Phase separation under thermophilic conditions was shown to enhance methane production from sugar-rich substrates.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Lucas T. Fuess, Adriana F. M. Braga, Felipe Eng, Gustavo B. Gregoracci, Flavia T. Saia, Marcelo Zaiat, Piet N. L. Lens
Summary: Removing sulfate prior to methanogenesis and maintaining year-round operation are the main challenges for highly efficient bioenergy recovery from sugarcane vinasse. The study assessed the establishment and optimization of sulfidogenesis during vinasse fermentation at different temperature levels and the impact of replacing vinasse by molasses. The results showed that sulfidogenesis was not efficiently established at 30 degrees C, but successful sulfate removal was achieved at 55 degrees C. Replacing vinasse by molasses negatively impacted sulfate-reducing bacteria but they were resilient to severe acidic and thermophilic conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Rafaely X. de S. Furtado, Carolina A. Sabatini, Isabel K. Sakamoto, Marcelo Zaiat, Eduardo B. Azevedo
Summary: Perfluorooctane sulfonic acid (PFOS) is widely used in the textile industry as a surfactant and can be found in various products. This study investigated the degradation of PFOS in anaerobic conditions using simulated domestic sewage. After 10 days, a 24% degradation of PFOS was achieved. Biodegradation products were identified, including a new compound: C4F9CHO (2,2,3,3,4,4,5,5,5-nonafluoropentanal). The biodegradation products showed increased lipophilicities and ecotoxicities compared to PFOS.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Willame A. Cavalcante, Camila Aparecida de Menezes, Francisco C. G. da Silva, Tito A. Gehring, Renato C. Leita, Marcelo Zaiat
Summary: This investigation presents a reproducible approach to determine the limits of an upflow anaerobic sludge blanket (UASB) reactor for methanizing fruit and vegetable waste. Two identical UASB reactors were operated for 240 days and achieved methane yield close to 0.250 LCH4 gCOD-1 up to an organic load rate (OLR) of 7.7 gCOD L-1 d-1. The maximum volumetric methane production rate of 2.0 LCH4 L-1 d-1 was observed for OLR ranges between 7.7 and 10 gCOD L-1 d-1. However, an overload at an OLR of 10 gCOD L-1 d-1 resulted in a significant reduction in methane production in both reactors. The study estimated a maximum loading capacity of approximately 8 gCOD L-1 d-1 based on the methanogenic activity of the UASB reactors' sludge.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Angelica Marcia dos Santos, Josiel Martins Costa, Giselle Patricia Sancinetti, Renata Piacentini Rodriguez
Summary: This study evaluated the communities of sulfate-reducing bacteria (SRB) in batch reactors without external nitrogen and phosphorus sources. After 100 days of operation, sulfate and COD removal rates reached 71.8% and 86.5% respectively. The SRB population increased significantly and the richness of SRB bands was higher compared to the initial inoculum. The sequenced bands showed similarities to known SRB species. Therefore, biological treatment of acid mine drainage wastewater without nutrient supplementation was effective in removing sulfates.
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Ana Paula Trevisan, Lucas Tadeu Fuess, Marcelo Zaiat, Eduardo Borges Lied, Simone Damasceno Gomes
Summary: This study simulated the application of continuous multiple tube reactor (CMTR) in the production of biohydrogen from sucrose-rich wastewater. The study assessed the operational limits of the reactor and found that the biohydrogen production was maximized under moderate wastewater concentration and optimal organic loading rate (OLR).
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Thiago H. G. da Silva, Rafaely X. S. Furtado, Marcelo Zaiat, Eduardo B. Azevedo
Summary: This study assessed the feasibility of coupling the heterogeneous Fenton process to biologically treated domestic sewage for the removal of diclofenac, ranitidine, and simvastatin. The results showed that the purified natural zeolite impregnated with iron was an effective catalyst for the process. However, the process had disadvantages such as high hydrogen peroxide consumption and size exclusion effects.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
E. G. F. Rezende, G. H. D. Oliveira, P. T. Couto, M. Zaiat, R. Ribeiro
Summary: Models were developed to represent the selection of PHA-producing microorganisms in a sequencing batch reactor (SBR) and the accumulation of PHA in a fed-batch reactor from sugarcane vinasse. Sensitivity analysis and optimization were conducted to understand the influence of parameters and operational conditions on PHA production. The results showed that higher CODt/Nitrogen ratios in the SBR favored the growth response rather than storage, shedding light on the impact of CODt/Nitrogen ratio on PHA accumulation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Lucas T. Fuess, Adriana F. M. Braga, Marcelo Zaiat, Piet N. L. Lens
Summary: This study investigated the use of sulfate-free vinasse and molasses as substrates to obtain enhanced year-round methane production in sugarcane biorefineries. The results showed that pre-fermenting vinasse and molasses was imperative for maintaining efficient organic matter conversion into methane. This strategy provides an efficient approach to achieve year-round high-rate biogas production in sugarcane vinasse.
CHEMICAL ENGINEERING JOURNAL
(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)
