Article
Environmental Sciences
Lijuan Deng, Wenshan Guo, Huu Hao Ngo, Xinbo Zhang, Cheng Chen, Zhuo Chen, Dongle Cheng, Shou-Qing Ni, Quan Wang
Summary: This review highlights the importance of media used in attached growth MBR (AGMBR) for wastewater treatment, with conventional media enhancing pollutant removal and new media excelling in removing emerging pollutants. Additionally, media improve sludge characteristics and alleviate membrane fouling issues. Future research should focus on developing new functional media for wider spectrum pollutant removal and enhancing biogas generation in AGMBRs at pilot or full-scale levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zhetai Hu, Tao Liu, Zhiyao Wang, Jia Meng, Min Zheng
Summary: This study proposes a novel wastewater treatment scheme that combines chemically enhanced primary treatment (CEPT), partial nitritation and anammox (PN/A), and anaerobic digestion (AD) to achieve energy-neutral wastewater treatment. By adding FeCl3 to the CEPT process, high removal rates of COD and phosphate were achieved, and alkalinity was reduced. Stable accumulation of nitrite was achieved in an aerobic reactor using a novel acid-tolerant ammonium-oxidizing bacteria (AOB), Candidatus Nitrosoglobus. After polishing in an anoxic reactor (anammox), satisfactory effluent quality was obtained. The integrated system demonstrated stable performance and could achieve energy self-sufficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Agricultural Engineering
Bao-Trong Dang, Thanh-Tin Nguyen, Xuan-Thanh Bui, Huu Hao Ngo, Kun-Yi Andrew Lin, Itayama Tomoaki, Todd Saunders, Tan-Nhut Huynh, Thanh Ngoc-Dan Cao, Chettiyappan Visvanathan, Sunita Varjani, Eldon R. Rene
Summary: This study compared the treatment efficiency of non-submerged attached growth systems using bio-sponge, bio-cord, and bio-cloth media, finding that bio-sponge and bio-cloth had higher removal rates of COD and NH4+-N compared to bio-cord. Alkalinity was found to govern the formation of anaerobic zones in bio-sponges, impacting nitrification. Increasing internal recirculation ratio from 1 to 3 resulted in sloughing of attached biomass and was positively correlated with effluent nitrite nitrogen concentration, highlighting the sensitivity of nitrification to spatial distribution effects.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Xikai Chen, Xietian Zheng, Jingang Huang, Junhong Tang, Xiaobin Xu, Pingzhi Hou, Wei Han
Summary: This study investigated the co-fermentation of waste steamed bun and municipal wastewater for biohydrogen generation in order to support the energy demand of municipal wastewater treatment plants. The use of solid enzymes for ultra-fast hydrolysis resulted in significantly higher hydrogen yields compared to traditional anaerobic fermentation. The economic analysis showed that the scenario utilizing solid enzymes was the most competitive option.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Manal Ali, Ahmed Elreedy, Manabu Fujii, Ahmed Tawfik
Summary: The study successfully achieved efficient degradation of phenol at a salinity level of 10 g-NaCl/L using a packed-bed circular baffled reactor and co-metabolism strategy, with over 99.9% phenol removal and approximately 98% overall biodegradability. However, a sudden increase in phenol concentration led to a significant decrease in removal efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Review
Agricultural Engineering
Khushboo Iqbal, Abhishek Saxena, Priyanshi Pande, Archana Tiwari, Naveen Chandra Joshi, Ajit Varma, Arti Mishra
Summary: Anthropogenic activities have impacted the environment, resulting in waste accumulation in water bodies. Wastewater treatment requires significant energy, but microbial electrolysis can break down organic pollutants and produce clean water and biohydrogen. The interaction between microalgae and bacteria enhances biohydrogen production.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Pranjal Tripathi, Sonam Tiwari, Ravi Kumar Sonwani, Ram Sharan Singh
Summary: In this study, Bacillus licheniformis immobilized with low-density polyethylene (LDPE) was used to degrade Brilliant Green (BG) dye from wastewater in a packed bed bioreactor. The effects of different concentrations of BG dye on bacterial growth and extracellular polymeric substance (EPS) secretion were assessed. The impacts of external mass transfer resistance on BG biodegradation were also evaluated. A new mass transfer correlation was proposed and intermediates during the biodegradation of BG were identified.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Guangpu Zhao, Xiaoyan Wang, Yu Hong, Xiaoya Liu, Qiao Wang, Qingyu Zhai, Hongkai Zhang
Summary: The attachment effects of six carrier materials on the cultivation of high-value microalga Scenedesmus sp. LX1 in diluted swine wastewater were investigated. The contact angle and surface structure of the material affected the attachment of microalgae. Moreover, the microalga was found to efficiently remove pollutants and accumulate high-value products.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Muhammad Abdul Qyyum, Ihsanullah Ihsanullah, Rizwan Ahmad, Sherif Ismail, Amin Khan, Abdul-Sattar Nizami, Ahmed Tawfik
Summary: This study presents the potential of using real industrial wastewater for hydrogen production and discusses recent trends in bioreactors with a focus on commercial and economic aspects. The breakthroughs in lab-based and pilot-scale research are explained, highlighting the significant role of different bioreactors and commercialization in developing sustainable energy. Immobilization, high-loaded reactors, and sequential dark and photo-fermentation are viable methods for implementing and commercializing biohydrogen reactors. Microbial electrolytic cell is considered a more promising technology for hydrogen production due to its better control over hydrogen generation rate and effective conversion of organic feedstock.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Agricultural Engineering
Omprakash Sarkar, Ulrika Rova, Paul Christakopoulos, Leonidas Matsakas
Summary: Sustainable production of fuels and chemicals is crucial for reducing carbon footprint. This study evaluated the production of hydrogen and platform chemicals from pretreated birch sawdust, demonstrating the potential for biofuel production. The integration of acidogenic fermentation with anaerobic digestion in a biorefinery framework showed promising results for the production of biohythane and biomethane.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ksenia Velmozhina, Polina Shinkevich, Viacheslav Zhazhkov, Natalia Politaeva, Vadim Korablev, Iaroslav Vladimirov, Tania Carbonell Morales
Summary: This article explores the feasibility of producing biohydrogen from microalgae after being used in wastewater purification and CO2 removal from the air. The authors investigated different methods for disrupting microalgae cell membranes and their effects on biohydrogen yield. The results showed that thermal and acid treatments resulted in the highest hydrogen production, while microwave radiation did not yield significant results. Treatment enhanced biohydrogen yield.
Article
Environmental Sciences
Alana G. L. Moura, Camila A. B. S. Rabelo, Edson L. Silva, Maria Bernadete A. Varesche
Summary: An alternative method to enhance the production of biorefinery products is the combination of nanotechnology and biological processes. By comparing batch reactors and continuous anaerobic fluidized bed reactors, the effects of zero valence iron and nickel nanoparticles on hydrogen and volatile fatty acid production were evaluated.
ENVIRONMENTAL TECHNOLOGY
(2023)
Review
Energy & Fuels
Sufiyan Siddiqui, Pranshul Bhatnagar, Sahej Dhingra, Utkarsh Upadhyay, I. Sreedhar
Summary: In recent years, there has been an increasing demand for efficient and sustainable energy generation methods from waste products, as well as wastewater treatment, due to the exponential increase in effluent-laden wastewater from industries, the agricultural sector, and the food sector. Microbial fuel cells offer a potential solution to these issues by performing bioelectrochemical processes to generate power from organic biodegradable compounds. However, they still face economic and scientific challenges.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Chemistry, Physical
Shams Forruque Ahmed, M. Mofijur, Muntasha Nahrin, Sidratun Nur Chowdhury, Samiha Nuzhat, May Alherek, Nazifa Rafa, Hwai Chyuan Ong, L. D. Nghiem, T. M. I. Mahlia
Summary: This paper reviews the factors influencing biohydrogen production from microalgae originating from wastewater, the pretreatment techniques to improve synthesis, advanced technologies utilized for enhancing biohydrogen production, and the techno-economic feasibility evaluation of the processes at a commercial scale. The efficiency of these processes is influenced by factors such as microalgae species, light intensity, cell density, pH, temperature, substrates, and bioreactor type. However, limitations such as oxygen sensitivity and high operational and maintenance costs hinder the sustainability and scalability of biohydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Applied
Juan Yang, Siliang Wu, Ruijie Mai, Li Lin, Wenhong Zhao, Weidong Bai
Summary: This study focuses on the formation mechanism of amino acid-derived volatile compounds in dry-cured mackerel, revealing the crucial role of specific microorganisms in the production of AAVC.
Review
Agricultural Engineering
M. Venkateswar Reddy, Gopalakrishnan Kumar, Gunda Mohanakrishna, Sutha Shobana, Riyadh Al-Raoush
BIORESOURCE TECHNOLOGY
(2020)
Review
Energy & Fuels
Sanath Kondaveeti, Ibrahim M. Abu-Reesh, Gunda Mohanakrishna, Metin Bulut, Deepak Pant
FRONTIERS IN ENERGY RESEARCH
(2020)
Article
Engineering, Environmental
Mohanakrishna Gunda, Sanath Kondaveeti, L. Krishna Bharat, Jeevan Kumar Reddy Modigunta, Ibrahim M. Abu-Reesh, Riyadh I. Al-Raoush
Summary: Adapting MFC to a magnetic field and applying a short term electric potential enhanced its performance in power generation and organic reduction in food waste leachate. The best results were achieved with a magnetic field at 220 mT and an electric potential at 500 mV.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Energy & Fuels
Gunda Mohanakrishna, Riyadh Al-Raoush, Ibrahim M. Abu-Reesh
Summary: By integrating an electrochemical cell and a microbial fuel cell, a sustainable and novel approach was developed to treat pollutants in produced water, generating bioelectricity and efficiently removing contaminants. This integration demonstrated the potential for net positive energy generation and indicated the successful transfer of electrons in bioanodic processes.
Article
Environmental Sciences
C. Nagendranatha Reddy, Sanath Kondaveeti, Gunda Mohanakrishna, Booki Min
Summary: Anaerobic digestion is a potential bioconversion process for treating organic wastes and generating green energy, but it has limitations that can be overcome by bioelectrochemical systems to improve energy recovery efficiency.
Article
Agricultural Engineering
Gunda Mohanakrishna, Annie Modestra
Summary: Bioenergy production from lignocellulosic biomass (LCB) is an important topic for meeting energy demand, addressing climate change and waste management. Hydrothermal pretreatment is gaining popularity for organics recovery from LCB and can lead to the production of biohydrogen and biomethane. Integration approaches and utilization of solid residue obtained from LCB pretreatment were also discussed. The importance of hydrothermal pretreatment as a suitable strategy for LCB utilization and its future potential in large-scale energy recovery were emphasized.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
C. Femina Carolin, P. Senthil Kumar, Gunda Mohanakrishna, R. V. Hemavathy, Gayathri Rangasamy, Tejraj M. Aminabhavi
Summary: Globally, the increase in human population has led to the rise of various industries, resulting in the production of various types of wastes. Industrial pollutants have become a major concern due to their harmful effects on human and environmental health. Effective waste management is in high demand to handle the increasing amount of waste generated. This review explores the utilization of industrial waste in the production of sustainable biosurfactants and discusses their categorization. It also emphasizes waste management and its implications for the bioeconomy, offering recent scientific literature and highlighting research needs in this area.
Review
Energy & Fuels
Sanath Kondaveeti, Dhivakar Govindarajan, Gunda Mohanakrishna, Dayakar Thatikayala, Ibrahim M. Abu-Reesh, Booki Min, Indumati M. Nambi, Riyadh I. Al-Raoush, Tejraj M. Aminabhavi
Summary: Petroleum industries generate large amounts of wastewater containing high concentrations of recalcitrant pollutants. Bioelectrochemical systems (BESs) have been widely used to treat these wastewaters while simultaneously generating bioelectricity and value-added chemicals. This review discusses the applications of BESs in the treatment of petroleum wastewater and compares them with other biological processes.
Review
Environmental Sciences
K. Sivagami, Pranshu Sharma, Ansaf Karim, Gunda Mohanakrishna, S. Karthika, G. Divyapriya, R. Saravanathamizhan, A. Naresh Kumar
Summary: Electrochemical methods are superior in treating recalcitrant water borne pollutants due to their high efficiency and treatment rate. Electro-oxidation (EO) is a recent development that completely mineralizes non-biodegradable organic matter and eliminates some inorganic species, making it a robust and versatile technology. The treatment efficiency is determined by electrode materials, electrolyte concentration, pH, and current density applied in electrochemical processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
A. Saravanan, P. Senthil Kumar, Michael Badawi, Gunda Mohanakrishna, Tejraj M. Aminabhavi
Summary: The consumption of petroleum products causing global warming has led to the search for alternative and eco-friendly energy sources. Algae are viewed as versatile feedstock materials for sustainable power sources and green biorefinery. This review provides extensive details of the sustainable process of microalgae biomass in biorefinery applications, including pre-treatment strategies, bioconversion into biofuel, and metabolic engineering methodologies. The article also examines the techno-economic analysis, sustainability, challenges, and future perspectives in algal biofuel development and pretreatment process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Deepanshi Rajput, Anshu Baldia, Akshay Kumar, Vinod Kumar, Gunda Mohanakrishna, Kashyap Kumar Dubey
Summary: Nitrogen is crucial for life and food production, but the loss of unused nitrogen in wastewater, air, freshwater, and oceans has led to nitrogen pollution, impacting the environment and causing eutrophication, climate change, biodiversity loss, and ozone depletion. It also affects human health by causing cardio respiratory issues. Anthropogenic activities like food processing, fertilizer production, and mining have disrupted the global nitrogen cycle. Autotrophic ammonia-oxidizing microbial communities, such as AOA, AOB, and AnAOB, are widely used to remove nitrogen. New strategies, such as Anammox, Feammox, and Comammox, are being developed to reduce carbon footprint and improve nitrogen removal efficiency. This review explores the applications of autotrophic ammonia oxidizers in agriculture, wastewater treatment plants, and engineered ecosystems, as well as the stress impacts on these organisms.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Manisha Sharma, Deepanshi Rajput, Vinod Kumar, Indu Jatain, Tejraj M. Aminabhavi, Gunda Mohanakrishna, Ravi Kumar, Kashyap Kumar Dubey
Summary: Excessive usage and unrestricted discharge of antibiotics in the environment lead to their accumulation in the ecosystem. Photodegradation of four commonly consumed antibiotics was studied using Cu2O-TiO2 nanotubes. The cytotoxicity of the transformed products was evaluated on cell lines.
ENVIRONMENTAL RESEARCH
(2023)
Review
Green & Sustainable Science & Technology
Prakash Kumar Sarangi, Vivekanand Vivekanand, Gunda Mohanakrishna, Bhabjit Pattnaik, Uday M. Muddapur, Tejraj M. Aminabhavi
Summary: The massive utilization of fossil resources for synthetic chemical production is causing environmental issues. A circular sustainable bioeconomy model can address these problems by utilizing renewable resources such as agricultural waste biomass. Agricultural waste presents a promising source for sustainable chemicals and fuels. The review focuses on the reclamation of phenolics from agricultural residues and highlights sustainable extraction technologies.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Multidisciplinary Sciences
Gunda Mohanakrishna, Ibrahim M. Abu-Reesh, Deepak Pant
SCIENTIFIC REPORTS
(2020)
Review
Energy & Fuels
Abudukeremu Kadier, Pratiksha Jain, Bin Lai, Mohd Sahaid Kalil, Sanath Kondaveeti, Khulood Fahad Saud Alabbosh, Ibrahim M. Abu-Reesh, Gunda Mohanakrishna
BIOFUEL RESEARCH JOURNAL-BRJ
(2020)
