Article
Engineering, Environmental
Naveen Chand, Kapil Kumar, Surindra Suthar
Summary: The study demonstrated that intermittent aeration in VFCWs significantly improved the removal efficiency of COD, NH4+-N, NO3-N, and TP compared to non-aerated setups, while setups with biochar (BC) addition and plantation were more advantageous in nutrient removal than those without BC. Moreover, the COD/N ratio of wastewater did not have a significant impact on VFCWs with BC and intermittent aeration, indicating the effectiveness of slow adsorption and fast aerobic degradation processes.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Eli Hendrik Sanjaya, Yujie Chen, Yan Guo, Jiang Wu, Hong Chen, Mohd Fadhil Md Din, Yu-You Li
Summary: The study successfully implemented the SNADCO method in an air-lift moving bed biofilm reactor for treating digested fish processing wastewater, showing advantages in handling high ammonia concentration and organic compounds. The nitritation and anammox route were predominant in nitrogen removal, while COD oxidation and microbe proliferation played the main role in COD removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Hengyi Liu, Lei Li, Wenjie Ye, Lingyu Ru, Guotao Liu, Xuya Peng, Xiaoming Wang
Summary: A hybrid activated sludge membrane-aerated biofilm reactor based on a two-stage simultaneous nitrification-denitrification (SND) process was successfully utilized for treating interflow with low COD/N ratio. The reactor showed stable operation and high removal efficiency for COD, TN, and ammonia nitrogen under low COD/N conditions. Additionally, aerobic denitrification was found to play an important role in the denitrification process under aerobic conditions.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Ncumisa Mpongwana, Sudesh Rathilal
Summary: This review explores the properties of biofilms that can be exploited to enhance biological wastewater systems. It reveals that various biofilm properties, such as extracellular polymeric substances (EPS), quorum sensing (Qs), and acylated homoserine lactones (AHLs), can be enhanced to improve biofilm technology for wastewater treatment processes. The review also emphasizes the importance of exploiting these properties in simultaneous nitrification and denitrification and biological phosphorus removal processes.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Dan Chen, Lizhuang Yang, Zhiling Li, Zhixing Xiao
Summary: Solid-phase humic substances were immobilized on a biocathode to support denitrification at low temperatures, showing stable denitrification capacity and higher microbial denitrification rates. Humin was found to be a stable redox mediator, suggesting its potential as a useful strategy for electrostimulated denitrification in groundwater.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Environmental
Jiaran Liu, Amjad Ali, Junfeng Su, Zizhen Wu, Ruijie Zhang, Renbo Xiong
Summary: This study established an immobilized biofilm reactor for the simultaneous removal of calcium, fluoride, nickel, and nitrate by microbial induced calcium precipitation. By analyzing reactor operating parameters and component precipitates, it demonstrated effective removal of targeted substances from water bodies. High-throughput sequencing identified Acinetobacter sp. H-12 as the dominant bacterial group involved in the process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Ruijie Zhang, Amjad Ali, Junfeng Su, Jiaran Liu, Zhao Wang, Jiawei Li, Yu Liu
Summary: A novel strategy using an immobilized biofilm reactor based on anaerobic microbial induced calcium precipitation (MICP) was proposed for polluted groundwater treatment, achieving high removal efficiencies. The results showed that the removal of pollutants was achieved through a combination of anaerobic MICP, adsorption, and co-precipitation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Andres Pichel, Andrea Fra, Nicolas Morales, Jose Luis Campos, Ramon Mendez, Anuska Mosquera-Corral, Angeles Val del Rio
Summary: This study demonstrates that despite the higher sCOD/N ratios in OFMSW digestate, good synergy can be achieved through AS pre-treatment in the PN-AMX process, resulting in better effluent quality and lower nitrogen removal rates.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Yuval Shelly, Martin Kuk, Ofir Menashe, Gadi Zeira, Sara Azerrad, Eyal Kurzbaum
Summary: Efficient nitrate removal from nitrate-rich RO concentrate was achieved using a new Acinetobacter isolate through bioaugmentation. Treatment with a biofilm resulted in nitrate removal rates up to four times greater than bioaugmented bacterial suspension in both batch and continuous bioreactors, achieving the highest rates of denitrification ever reported for groundwater and RO concentrate.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Yinfeng Xia, Debao Lu, Yiting Qi, Han Chen, Yufeng Zhao, Yu Bai, Lifang Zhu, Nan Geng, Cundong Xu, Ertian Hua
Summary: A biochar electrode based biofilm reactor was developed for advanced removal of nitrate from agricultural runoff. By optimizing operation conditions and utilizing bio-electrochemical reduction, high nitrate removal efficiency could be achieved. The biochar electrode material significantly promotes the utilization efficiency of cathode electrons by microorganisms, thereby improving the denitrification capacity.
Article
Agricultural Engineering
Pei Hong, Keyin Yang, Yilin Shu, Bangding Xiao, Hailong Wu, Yunyun Xie, Yali Gu, Fangping Qian, Xingqiang Wu
Summary: By studying three aerobic denitrifiers with dual-capacities of strong auto-aggregation and high nitrogen removal efficiency, efficient nitrogen-rich wastewater treatment in a sequencing batch biofilm reactor was achieved. The coaggregation strains successfully colonized in the bioreactor and demonstrated a strong tolerance to high nitrogen concentrations, contributing to efficient inorganic nitrogen removal and biofilm formation.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Secil Tutar Oksuz, Haluk Beyenal
Summary: Increasing electrode surface area can enhance TN removal rate, while it has a limited impact on COD removal rate in BES. Our results demonstrate the feasibility of simultaneous COD and TN removal in the BES system. Microbial community structure analysis revealed that nitrogen removal was mainly influenced by sulfidogenesis, anodic ammonia oxidation, autotrophic and heterotrophic denitrification processes.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Environmental Sciences
Chuanzhou Liang, Pedro N. Carvalho, Kai Bester
Summary: This study investigates the effects of substrate on the biological removal of pharmaceuticals in moving bed biofilm reactors. The study finds that adaptation and stimulation have different effects on the removal rates, with adaptation leading to significant increases and stimulation having minor effects. Changes in substrate loading also influence the preferential degradation pathways.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Kuppusamy Sathishkumar, Yi Li, Mohamad S. Alsalhi, Balakrishnan Muthukumar, Gajendra Kumar Gaurav, Sandhanasamy Devanesan, Aruliah Rajasekar, Ramalingam Manikandan
Summary: This study investigated the biological denitrification process in the presence of gC(3)N(4) doped TiO2 composite and elucidated the role of extracellular polymeric substances. The results showed that the gC(3)N(4) doped TiO2 composite significantly enhanced nitrate reduction and electron transfer. The integration of gC(3)N(4) doped TiO2 photocatalyst and biofilm is a promising technology for nitrate removal.
ENVIRONMENTAL RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Wentao Zhu, Jing Chen, Sicheng Yuan, Wenjiao Sang, Yihui Ban, Shiyang Zhang
Summary: In this study, three double-layered mixotrophic sequencing batch biofilm reactors involving pyrite-based autotrophic denitrification were used to treat real domestic wastewater. By adjusting the frequency of intermittent aeration to 16 times per operating cycle, high removal percentages of ammonium-nitrogen, total nitrogen, and orthophosphate were achieved. The dominant microbial taxa observed in the system were found to contribute to the multiple nitrogen metabolism, and sulfur metabolic pathways were also identified. These findings provide new insights into the nutrient removal mechanism in PAD-based mixotrophic denitrification systems treating real domestic wastewater under intermittent aeration mode.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Biotechnology & Applied Microbiology
Fangzhou Dong, Mehdi Nemati
BIOCHEMICAL ENGINEERING JOURNAL
(2016)
Article
Environmental Sciences
Lyman Moreno, Mehdi Nemati, Bernardo Predicala
ENVIRONMENTAL TECHNOLOGY
(2018)
Article
Environmental Sciences
Bennet Awume, Mehdi Tajallipour, Mehdi Nemati, Bernardo Predicala
WATER AIR AND SOIL POLLUTION
(2017)
Article
Biotechnology & Applied Microbiology
Lyman Moreno, Mehdi Nemati, Bernardo Predicala
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2015)
Article
Environmental Sciences
Yi Zhou, Mehdi Nemati
WATER AIR AND SOIL POLLUTION
(2018)
Article
Environmental Sciences
Wen Wang, Mehdi Nemati
Summary: The anoxic co-biodegradation of linear and cyclic naphthenic acids (NAs) coupled with denitrification in denitrifying biofilm reactors showed that octanoic acid had the fastest biodegradation rate. The presence of recalcitrant NAs did not influence the biodegradation of octanoic acid and trans-4MCHCA, while co-biodegradation of cis- and trans-4MCHAA with other compounds enhanced the biodegradability of these recalcitrant NAs. This anoxic biodegradation method could be an effective alternative for treating oil sands process water, offering faster rates compared to aerobic methods.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Hamid Zanjani, Jafar Soltan, Mehdi Nemati
Summary: Intermediate NAs concentrations and loading rates are most effective for biodegradation efficiency and removal rate, with Proteobacteria and Actinobacteria being the most abundant phyla in the biofilm.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Article
Environmental Sciences
Yi Zhou, Mehdi Nemati
Summary: The co-biodegradation of phenol and cresols in binary and ternary mixtures was investigated using circulating packed-bed bioreactors. The study found that increasing the concentration of o-cresol and p-cresol enhanced their removal rate, but negatively affected the biodegradation of phenol. The removal efficiency had a greater impact on eliminating toxicity than the removal rate.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Engineering, Environmental
Ali Ekhlasi Nia, Kharazm Khaledi, Bernardo Predicala, Mehdi Nemati
Summary: Waste streams from livestock facilities contribute to water contamination by nitrogenous compounds and a feasible approach for their treatment is needed. This study used a microbial culture originally developed for anoxic biodegradation of naphthenic acids in woodchip bioreactors to evaluate denitrification and denitrition in medium simulating livestock wastewaters. The effects of nitrate and nitrite concentrations, loading rate, manure content, and residence time on the performance of the bioreactors were investigated.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
K. Khaledi, G. M. Valdes Labrada, J. Soltan, B. Predicala, M. Nemati
Summary: The development of a magnetized activated carbon adsorbent with improved separation efficiency for the removal of antibiotics from water was studied. The adsorbent exhibited competitive adsorption properties between TC and LM, and the process was endothermic. Non-isothermal fitting of the data into different adsorption models provided insights into the adsorption behavior of the system. Redlich-Peterson isotherm accurately predicted TC adsorption data at different temperatures, while the extended Langmuir model accurately predicted the binary adsorption system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Guadalupe Montserrat Valdes Labrada, Suraj Kumar, Ruth Azar, Bernardo Predicala, Mehdi Nemati
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Guadalupe Montserrat Valdes Labrada, Mehdi Nemati
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2018)
Proceedings Paper
Engineering, Environmental
G. Valdes Labrada, M. Nemati
FRONTIERS IN WASTEWATER TREATMENT AND MODELLING, FICWTM 2017
(2017)
Article
Engineering, Environmental
Ebrahim Rezaei, Ruth Azar, Mehdi Nemati, Bernardo Predicala
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Engineering, Environmental
Ebrahim Rezaei, Beauregard Schlageter, Mehdi Nemati, Bernardo Predicala
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
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)
