Article
Microbiology
Miriam Orrantia, Edna R. Meza-Escalante, Vianey A. Burboa-Charis, Refugio B. Garcia-Reyes, Marina M. Atilano-Camino, Denisse Serrano-Palacios, Luis A. Leyva, Yair A. Del Angel, Luis H. Alvarez
Summary: This study evaluated the impact of particle size and dosage of granular activated carbon (GAC) on methane production from swine wastewater, and found that GAC can improve both the fermentation and methanogenesis stages of anaerobic digestion.
Review
Energy & Fuels
Leilei Xiao, Eric Lichtfouse, P. Senthil Kumar
Summary: This study compares the microbial mechanisms of DIET-CO2 reduction and acetoclastic methanogenesis mediated by conductive materials, highlighting the increasing importance of acetoclastic methanogenesis in anaerobic digestion. The diverse microbial mechanisms affected by conductive materials to improve potential acetoclastic methanogenesis are detailed reviewed, suggesting possible future applications for acetotrophic methanogens in anaerobic digestion and natural ecological environment management.
Article
Agricultural Engineering
Zahra Al Hasani, Jagdeep Kumar Nayak, Halima Alhimali, Abdullah Al-Mamun
Summary: The study found that the use of conductive additive GAC/nZVI in anaerobic digestion process can significantly increase the biogas production and methane generation, as well as improve the removal rate of COD.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Fubin Yin, Hongmin Dong, Wanqin Zhang, Shunli Wang, Bin Shang, Zhiping Zhu
Summary: The study found that anaerobic digestion can completely eliminate certain antibiotics in swine manure under certain conditions, while the presence of certain antibiotics can also affect methane production. The modified Gompertz model, applicable to different antibiotic loads, performed well and showed a strong correlation between antibiotic reduction and methane production for certain antibiotics.
BIOSYSTEMS ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Youqian Xiao, Hongnan Yang, Dan Zheng, Yi Liu, Cong Zhao, Liangwei Deng
Summary: The study found that protein degradation decreased with increasing ammonia concentration at 20 degrees Celsius, but was less affected at 35 degrees Celsius and 55 degrees Celsius. Additionally, adding GAC at different temperatures significantly improved methane production rates.
Article
Agricultural Engineering
Ruiliang Zhang, Xueqin Lu, Yujie Tan, Teng Cai, Yule Han, Dilibaierkezi Kudisi, Chengxin Niu, Zhongyi Zhang, Wanjiang Li, Guangyin Zhen
Summary: The study demonstrated that DMC/PDS activation can effectively enhance sludge solubilization and methane production by degrading organic biopolymers and accelerating electron transfer of microorganisms. Ultimately, this pretreatment has a significant impact on improving anaerobic bioconversion of sludge.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Jingmiao Zhang, Shuai Wu, Ao Xia, Dong Feng, Yun Huang, Xianqing Zhu, Xun Zhu, Qiang Liao
Summary: Anaerobic digestion (AD) technology is an effective method for biogas production and livestock waste treatment. This study investigated the impact of oxytetracycline (OTC) on the AD process and found that OTC significantly inhibited methane production, with methane yields decreasing by 58.6% and 73.3% in mesophilic and thermophilic ADs respectively at an initial OTC concentration of 400 mg/L. OTC can be degraded by the AD process with a removal efficiency above 90% at lower concentrations. Higher OTC concentrations resulted in lower bio-methane yield, energy conversion efficiency, and contaminant removal in both mesophilic and thermophilic ADs.
Article
Green & Sustainable Science & Technology
Vikas Kumar, Brandon Kieft, Parmila Devi, Steven J. Hallam, Cigdem Eskicioglu
Summary: This study investigated the effects of two-step activated carbon cloth on syntrophic microbial associations during anaerobic digestion of municipal sludge. The results showed that activated carbon cloth enhanced methane yield and reduced the lag phase, attributed to its increased electron transfer and methane production kinetics. Additionally, activated carbon cloth promoted the adherence of methane-producing microorganisms, providing a stable environment for syntrophic energy metabolism.
Article
Environmental Sciences
Lisha Yang, Long Chen, Kai Chen, Hongtao Zhu
Summary: This study investigated the effects of coupling microbial electrolysis cell (MEC) with anaerobic digestion (AD) on methane yield. The results showed that the methane yield was significantly improved through enhanced hydrolysis and acidogenesis, as well as enrichment of hydrogenotrophic methanogens. Carbon felt (CF) as an electrode exhibited the best performance, leading to a higher net energy output. The relative abundance of hydrogenotrophic methanogen in MEC-AD with CF as electrodes increased, contributing to the improved methane yield.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Haomin Zheng, Fangyi Tang, Yunqin Lin, Zhiyong Xu, Zenghua Xie, Jun Tian
Summary: Solid-state anaerobic digestion (SSAD) is a key technology for utilizing agricultural waste. In this study, swine manure digested effluent (SMDE) was used to pretreat rice straw, resulting in improved biodegradability and methane production in the subsequent SSAD process. This integrated approach has the potential for large-scale trials and wide applications in the future.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Neng Tao, Meicai Xu, Xiu Wu, Zilei Pi, Chaohua Yu, Di Fang, Lixiang Zhou
Summary: The addition of Schwertmannite significantly improved methane production from swine manure loaded with Cu, Zn, and As, by stimulating the enrichment of methanogenic bacteria and increasing the content of extracellular polymeric substances to enhance substrate degradation and microbial aggregates formation.
Article
Engineering, Environmental
Xiaoyuan Zhang, Jun Gu, Shujuan Meng, Yu Liu
Summary: This article discusses the issue of dissolved methane in anaerobic wastewater treatment and the feasibility and economic viability of existing dissolved methane recovery methods. The authors aim to provide additional insights into the cost-benefit of dissolved methane recovery and its emission through an assessment.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Review
Green & Sustainable Science & Technology
Qianqian Zhang, Yu Yang, Li-an Hou, Hongtao Zhu, Yaobin Zhang, Jian Pu, Yuyou Li
Summary: Anaerobic digestion (AD) is a crucial technology for the treatment of organic wastes, but there are still challenges such as low digestibility and slow reaction kinetics in practical implementation, limiting bio-product production. Carbon-based additives (CAs), particularly biochar and activated carbon (AC), have shown great potential in enhancing AD performance by facilitating direct interspecies electron transfer (DIET) and adjusting microorganisms. In this review, the research advancements in the use of CAs in AD systems are comprehensively summarized, covering the construction of CAs, their macro-behaviors, micro-mechanisms, and hybrid strategies. Furthermore, future modifications and applications of CAs in AD systems are discussed.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Engineering, Environmental
Yingdi Zhang, Lei Zhang, Huijuan Sun, Yiyang Yuan, Yang Liu
Summary: Granular activated carbon (GAC) has been found to play a significant role in improving anaerobic digestion (AD) through its conductive properties and surface functional groups. The addition of GAC stimulates the biosynthesis of extracellular microbial secretions, which act as essential nutrients and enhance COD removal and methane production in AD. Furthermore, the GAC-stimulated microbial extracellular secretions improve methane production rate without causing a significant shift in microbial community.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Yufen Wang, Kaixin Zheng, Haixiao Guo, Yindong Tong, Tingting Zhu, Yiwen Liu
Summary: This study revealed that vivianite significantly inhibits anaerobic digestion of waste activated sludge, leading to a decrease in methane yield, an increase in substrate remaining, and an impact on microbial communities.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Edgardo Valenzuela, Maria F. Ortiz-Zuniga, Julian Carrillo-Reyes, Ivan Moreno-Andrade, Guillermo Quijano
Summary: The study demonstrates the feasibility of enriching a microbial community capable of anaerobic oxidation of methane coupled to nitrate reduction using activated sludge. It shows that methane and nitrate removal rates are dependent on the applied nitrate loads, with no N2O emissions detected under certain conditions of dissolved O2 and pH control.
Article
Chemistry, Physical
Yair A. Del Angel-Acosta, Luis H. Alvarez, Refugio B. Garcia-Reyes, Julian Carrillo-Reyes, Alcione Garcia-Gonzalez, Edna R. Meza-Escalante
Summary: The study evaluated the capacity of heat-treated sludge to produce hydrogen through mono-and co-digestion of corn and brewery wastewater. Different initial pH values significantly influenced hydrogen production, with alkaline conditions potentially enhancing the production. The Clostridium genus played a key role in hydrogen production, especially under alkaline pH conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Guillermo I. Quijano, Edgardo Valenzuela, Domingo Cantero, Martin Ramirez, Ivonne Figueroa-Gonzalez
Summary: This study demonstrated that anoxic desulfurization process can impact the CH4 and CO2 content of purified biogas. The reduction in CO2 concentration and increase in CH4 concentration in the purified biogas were found to be proportional, with CO2 absorption playing a role in this process. Additionally, the presence of methane-oxidizing bacteria suggests that methane oxidation occurred in the desulfurization system.
Article
Materials Science, Ceramics
Daniel Olivo-Alanis, Marina Montserrat Atilano-Camino, Alcione Garcia-Gonzalez, Luis Humberto-Alvarez, Refugio Bernardo Garcia-Reyes
Summary: A novel method incorporating chlorophyll molecules into phenolic resins for photocatalytic degradation showed higher efficiency in degrading methylene blue under alkaline and acidic conditions. The photocatalytic degradation of synthetic blue wastewater demonstrated contradictory behavior compared to methylene blue experiments, being more effective in acidic conditions.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Carlos R. Chan-Pacheco, Edgardo Valenzuela, Francisco J. Cervantes, Guillermo Quijano
Summary: This study comprehensively reviews recent biotechnologies related to nitrogen removal processes, including various nitrogen removal processes and the application of new technologies. These technologies can play an important role in wastewater treatment and gas emission control, with the potential to reduce greenhouse gas emissions and improve air quality.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Jonathan Valentin-Reyes, Alcione Garcia-Gonzalez, Refugio B. Garcia-Reyes
Summary: This research aimed to assess the role of granular activated carbon (GAC) functional groups for anchoring iron particles and the effect of iron-loaded GAC for the adsorption of Cr (VI). The findings showed that oxidation treatment increased the iron anchoring on GAC surface, while heat-treated GAC with iron achieved the best Cr (VI) uptake capacity and adsorption kinetics. Cr (VI) desorption from the best adsorbent was mainly achieved through physical attraction.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Edgardo I. Valenzuela, Jose A. Contreras, Guillermo Quijano
Summary: This study assessed two widely available inocula for the anaerobic oxidation of methane coupled with NO3 reduction. It found that methane consumption via this process could be observed within a relatively short period using secondary activated sludge and a mixture of activated sludge and anaerobic granular sludge as inoculum. The study also identified the dominant microbial communities in the cultures and confirmed the absence of nitrous oxide, an undesirable intermediate, at the end of the incubations. The findings suggest that N-AOM processes can be implemented quickly and easily, making it a viable option for the treatment of residual methane in wastewater treatment plants and waste management facilities.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Daniel Olivo-Alanis, Alcione Garcia-Gonzalez, Miguel Angel Mueses, Refugio Bernardo Garcia-Reyes
Summary: A novel kinetic model was developed to predict the photocatalytic degradation of wastewater. The model takes into account the generation of reactive oxygen species, the rate of electron-hole pair generation, and the impact of reactive oxygen species on pollutants. The model demonstrated robustness and high accuracy under various operational conditions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Energy & Fuels
Laura Rivera-Montenegro, Edgardo Valenzuela, Armando Gonzalez-Sanchez, Raul Munoz, Guillermo Quijano
Summary: Volatile methyl siloxanes (VMS) generated from the metabolism of polydimethylsiloxanes (PDMS) in anaerobic digestion processes are biogas pollutants. In recent years, the widespread presence of VMS in different types of biogas has been demonstrated due to the intensive use of PDMS in various products. This review provides an overview of VMS concentrations in biogas, available physical-chemical technologies, and alternative biological processes for VMS removal. Critical research niches and challenges towards the consolidation of efficient and cost-effective VMS treatment systems are identified and discussed.
BIOENERGY RESEARCH
(2023)
Article
Environmental Sciences
Edgardo Valenzuela, Casey Bryce, Judith Forberg, Britta Planer-Friedrich, Andreas Kappler, Francisco J. Cervantes
Summary: Redox-active natural organic matter (NOM) has the potential to fuel chemical and biological reactions. This study explores the role of NOM as a terminal electron acceptor (TEA) in sulfide oxidation and its impact on methane-consuming processes. The findings suggest that NOM can compromise the availability of TEA for the oxidation of organic matter or methane. The study also reveals that NOM is a preferential TEA for catalyzing anaerobic oxidation of methane (AOM), while sulfate suppresses methanogenic activities. This research provides insights into how sulfur/organic matter interactions affect microbial processes of CH4 production and consumption.
Article
Biotechnology & Applied Microbiology
Alfonso Garcia, Edgardo Valenzuela, Alejandro Vargas, Ignacio de Godos, Raul Munoz, Meng Wang, Miguel Vital-Jacome, Guillermo Quijano
Summary: A photo-sequencing batch bioreactor (PSBR) was used to treat medium- and low-strength wastewaters, achieving a high removal efficiency of chemical oxygen demand. However, photoinhibition of nitrifying activity occurred under high irradiance conditions. A short settling time promoted the rapid formation of microalgal-bacterial aggregates (MABAs), and simulation of light penetration profiles proved to be a useful tool for identifying photoinhibition of nitrifying activity.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Monserrat Aguilar-Pichardo, Edgardo Valenzuela, Guillermo Quijano
Summary: This study showed that controlling the ammonium loading rate is the most important parameter for achieving efficient and stable nitritation. Continuous nitritation was achieved by using an easy-to-implement aeration strategy.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Review
Environmental Sciences
Jose A. Contreras, Edgardo I. Valenzuela, Guillermo Quijano
Summary: This study provides an overview of the recent developments in nitrate/nitrite-dependent anaerobic oxidation of methane (N-AOM), including the fundamental principles, microbiology, reactor configurations, and operational conditions. The potential advantages of the N-AOM process over aerobic methanotrophic biotechnologies are discussed, as well as the challenges of implementing this biotechnology at full scale.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Green & Sustainable Science & Technology
Leonel E. Amabilis-Sosa, Edgardo I. Valenzuela, Javier A. Quezada-Renteria, Aurora M. Pat-Espadas
Summary: Biochar has gained attention for its low cost and unique properties, which make it useful for various applications. It has shown promise in remediation of heavy metal pollution by stimulating bacterial activity through adsorption, adhesion, electron transport, and ion exchange. However, further research is needed to fully understand its potential effects and to develop improved biochar technologies for metal bioremediation.
Article
Engineering, Environmental
Jose A. Contreras, Edgardo I. Valenzuela, Patricia Bovio-Winkler, Claudia Etchebehere, Carmen Gabaldon, Guillermo Quijano
Summary: The anaerobic oxidation of methane coupled to denitrification (N-AOM) is a promising biotechnology for reducing the environmental impact of anaerobic effluents. In this study, a continuous N-AOM reactor was used to evaluate its performance, achieving methane elimination capacity values of 20-39 g m -3h- 1 with NO3- as the electron acceptor, and 48-61 g m -3h- 1 with a mixture of NO3- and NO2-. The pH value was found to be a critical factor influencing the process. Metagenomic analysis revealed potential metabolic mechanisms involved in N-AOM.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Francisco de Borja Ojembarrena, Elena Fuente, Angeles Blanco, Carlos Negro
Summary: Accumulation of Cr(VI) in industrial fiber cement process water can affect product quality and health, and it needs to be removed to avoid environmental risks. The study found that cationic cellulose nanocrystals (CCNCs) have higher adsorption efficiency and lower cost compared to conventional adsorbents.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Review
Engineering, Environmental
Shentan Liu, Yangchen Zhang, Xiaojuan Feng, Sang-Hyun Pyo
Summary: This paper summarizes the common problems of constructed wetlands (CWs) and proposes corresponding optimized solutions, including thermal insulation and additional aeration in cold climates, choosing suitable plant species and planting patterns to enhance phytoremediation in CWs, using various methods to monitor and evaluate CW clogging, implementing anti-clogging measures, controlling greenhouse gas emissions during CW treatment, constructing and utilizing CW databases, designing appropriate CW types, and implementing strict technical management and supervision.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Norzila Mohd, Nazlina Haiza Mohd Yasin, Wan Hasnidah Wan Osman, Mohd Sobri Takriff
Summary: This study demonstrates that Chlamydomonas sp. is effective in removing nutrients from palm oil mill effluent and shows particular efficiency in the removal of ammonium and phosphate.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Mingzhen Zhang, Guijian Liu, Ruijia Liu, Jinzhao Xu, Wen Si, Yong Wei
Summary: Tieguanyin tea stem was used to synthesize modified biochar for the adsorption of copper and zinc. Among the modified biochar, Fe-BCs had the highest adsorption capacity, with Fe-BC650 being the best adsorbent. It reached adsorption equilibrium in 1 minute and had a maximum adsorption capacity of 303.5996 mg/g for Cu (II) and 254.0711 mg/g for Zn (II) in single-metal solutions. However, there were antagonistic impacts between Cu2+ and Zn2+.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Lingling Zhao, Qiaoshu Zhou, Yun Yang, Yuan Zhang, Yewei Qiu, Yanjun Chen, Xian Jin, Xiangjun Yang, Shixiong Wang
Summary: This research presents a method for selectively recovering gold from e-waste water using metal sulfides microspheres prepared by hydrothermal technique. The results show that the assistance of visible light significantly improves the gold adsorption performance of metal sulfides. The metal sulfides exhibit excellent gold adsorption properties, high selectivity, ultra-high adsorption capacity, and good recyclability.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Organic-inorganic nanoblends, such as polysaccharide-blended-inorganic ones, have versatile applications and have gained significant research attention. In this study, a magnetic guar gum/graphene oxide nanocomposite blended with CuO was successfully prepared and investigated for its adsorption capacity for ciprofloxacin removal. The results showed that the nanocomposite exhibited excellent adsorption capacity and the adsorption process was spontaneous.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Umit Ecer, Sakir Yilmaz
Summary: A novel and effective catalyst Co@MIL-68(Fe)@Fe3O4@CM-BC was synthesized and used for the catalytic reduction of crystal violet in aqueous environments. The catalyst showed high efficiency in degrading crystal violet under specific conditions, and exhibited good regeneration performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Chi Zhang, Miao Zhang, Haohan Yang, Wei Cai, Jun Wu
Summary: Enhancing the bioaugmentation of common nitrifiers in the partial nitrification/anammox process can decrease the activity of nitrite oxidizing bacteria and increase the activity of anammox bacteria, leading to improved total nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Runzhang Zuo, Dajun Ren, Yangfan Deng, Canhui Song, Yubin Yu, Xiejuan Lu, Feixiang Zan, Xiaohui Wu
Summary: This study found that fine bubble aeration in membrane bioreactors (MBR) can better control membrane fouling and reduce energy consumption. However, compared to fine bubble aeration, coarse bubble aeration released more proteins and polysaccharides, resulting in a decrease in functional bacteria and enzymes involved in nitrogen and phosphorus pathways.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ch Tahir Mehmood, Jiekai Dai, Hanjun Zhao, Ziyi Zhong
Summary: Wirelessly powered photocatalyst-coated spheres (WPS) have been developed and demonstrated for various applications, including photodegradation and fouling control. These WPS are cost-effective, easy to fabricate, and have excellent visible light sources, making them suitable as carriers for photocatalysts.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Yifan Wang, Xiaoxuan Kang, Yuting Li, Ruyi Li, Chang Wu, Luyao Wang, Chongqing Wang, Tao Yang, Ming Ge, Zhangxing He
Summary: Cobalt/carbon nanofibers (Co/CNF) were prepared and exhibited excellent catalytic activity in the degradation of tetracycline by activating peroxodisulfate (PDS). The effects of process parameters on tetracycline removal were studied, and the reaction mechanism was confirmed through experiments.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ting Wei, Yaqian Zhao, Jia Guo, Bin Ji, Alvaro Pun Garcia, Abraham Esteve Nunez
Summary: This study developed a novel lightweight substrate (Al-NLS) composed of aluminum sludge and polyurethane, and investigated its effectiveness in constructed wetlands (CWs). Results showed that Al-NLS had favorable adsorption capacities for phosphorus and removal efficiencies for pollutants in real domestic wastewater. It also positively influenced the microbial community. Therefore, Al-NLS can be considered as a new alternative substrate in CWs technology.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Dabojani Das, Achinta Bordoloi, Heyang Yuan, Daniel J. Caldwell, Rominder P. S. Suri
Summary: This study evaluates the degradation kinetics of antibiotic resistance genes and mobile genetic elements in water matrices by ozone treatment. The results show that extracellular antibiotic resistance genes can be effectively removed, while intracellular genes are more resistant to degradation. The impact of wastewater matrix on gene degradation is minimal.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
