Browsing UiS Brage by Author "Kumar, Gopalakrishnan"
Now showing items 1-20 of 23
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Biohydrogen production from industrial wastewater: An overview
Preethi, *; Usman, T.M. Mohamed; Banu, Jeyakumar Rajesh; Gunasekaran, Muniappan; Kumar, Gopalakrishnan (Peer reviewed; Journal article, 2019-09)Biohydrogen production from industrial wastewater has been a focus of interest in recent years. The in depth knowledge in lab scale parameters and emerging strategies are needed to be investigated in order to implement the ... -
Effect of Dispersion Treatment on Dairy Waste Activated Sludge to Hasten the Production of Biogas
Rufus, D.P.; Banu, J. Rajesh; Kannah, R. Yukesh; Nguyen, Dinh Duc; Kumar, Gopalakrishnan; Chang, Soon Woong; Raja, S. Antony (Peer reviewed; Journal article, 2019)The solubilization potential of biological pre-treatment for waste activated sludge (WAS) is limited due to the floc structure of the WAS. Extra polymeric substances (EPS) are responsible for floc formation. In this ... -
Effective recovery of microalgal biomass using various types of emulsion polymers
Huy, Menghour; Kumar, Gopalakrishnan; Sharma, Pooja; Sirohi, Ranjna; Pandey, Ashok; Kim, Sang-Hyoun (Peer reviewed; Journal article, 2022)Microalgae biomass has been considered as one of the potential feedstocks in biofuel production. Yet, biomass harvesting poses a challenge to the overall production cost due to its low cell density. Flocculation has been ... -
Feasibility study of cost-effective nutrient media for microalgal growth within the aquaculture industry in a circular economy context
Øvestad, Natalia Goncharova (Master thesis, 2023)Microalgal biotechnology has been growing and expanding tremendously in recent years in various sectors. Being metabolically flexible, microalgae can adapt to demanding and even extreme growth conditions. Multiple applications ... -
Feasibility study of polyetherimide membrane for enrichment of carbon dioxide from synthetic biohydrogen mixture and subsequent utilization scenario using microalgae
Bakonyi, Péter; Peter, Jakub; Nemestóthy, Nándor; Malý, David; Kumar, Gopalakrishnan; Koter, Stanislaw; Kim, Sang-Hyoun; Kujawski, Wojciech; Bélafi-Bakó, Katalin; Pientka, Zbynek (Peer reviewed; Journal article, 2020)In this work, the potential of utilizing a polyetherimide (PEI) hollow-fiber membrane to separate synthetic biohydrogen mixture (H2/CO2) was studied. From the gas separation experiments, where the effects of feed to permeate ... -
Green Hydrogen Production from Residual Lignocellulosic Biomass via Dark Fermentation: Maximizing Hydrogen Yield via Optimal Pretreatment Method and Substrate-to-Inoculum Ratio
Vo, Quoc Si (Studentoppgave/UIS-TN-IKBM/2023;, Master thesis, 2023)This thesis presents an investigation into the biohydrogen production potential of Lignocellulosic Aquatic Residue (LAR), a byproduct of an industrial process. A detailed examination of the substrate and inoculum ... -
Innovative strategies for enhanced extraction and functionality of microalgae proteins.
Mohamed, Ayda Omar (Master thesis, 2023)Industrial exploitation of cultivated microalgae as protein feedstock has gained interest in recent years as a promising driver for the Norwegian bioeconomy. However, robust microalgal cell wall structures may lead to ... -
Integrated biorefineries for repurposing of food wastes into value-added products
Narisetty, Vivek; Adlakha, Nidhi; Kumar Singh, Navodit; Dalei, Sudipt Kumar; Prabhu, Ashish A; Nagarajan, Sanjay; Naresh Kumar, Kumar; Amruthraj Nagoth, Joseph; Kumar, Gopalakrishnan; Singh, Vijai; Kumar, Vinod (Peer reviewed; Journal article, 2022)Food waste (FW) generated through various scenarios from farm to fork causes serious environmental problems when either incinerated or disposed inappropriately. The presence of significant amounts of carbohydrates, proteins, ... -
Microbial Exopolysaccharide Composites in Biomedicine and Healthcare: Trends and Advances
Ahuja, Vishal; Bhatt, Arvind Kumar; Banu, J. Rajesh; Kumar, Vinod; Kumar, Gopalakrishnan; Yang, Yung-Hun; Bhatia, Shashi Kant (Peer reviewed; Journal article, 2023)Microbial exopolysaccharides (EPSs), e.g., xanthan, dextran, gellan, curdlan, etc., have significant applications in several industries (pharma, food, textiles, petroleum, etc.) due to their biocompatibility, nontoxicity, ... -
Microbiome involved in anaerobic hydrogen producing granules: A mini review
Pugazhendhi, Arivalagan; Kumar, Gopalakrishnan; Sivagurunathan, Periyasamy (Peer reviewed; Journal article, 2019)This mini review overviewed the latest updates on the anaerobic hydrogen fermentation using the granulation technology and the microbiome involved in the process. Additionally, the implication of various reactor design and ... -
Nutraceutical productions from microalgal derived compounds via circular bioeconomy perspective
Huy, Menghour; Vatland, Ann Kristin; Kumar, Gopalakrishnan (Peer reviewed; Journal article, 2021-03)Circular bioeconomy has become a sustainable business model for commercial production that promises to reuse, recycle & recover while considering less environmental footprints in nutraceutical industries. Microalgae ... -
Optimization of the Inoculum-to-Substrate Ratio in Solid-State Spent Coffee Grounds Anaerobic Digestion Biorefineries Using Anaerobic Sludge for Maximal Bio-CH4 Production.
Semaan, Georgeio (Masteroppgave/UIS-TN-IKBM/2020;, Master thesis, 2020)The optimization of bio-CH4 production from spent coffee grounds (SCGs) using anaerobic sludge (AS) under different inoculum-to-substrate ratios (ISRs) using solid-state batch-fed anaerobic digestion (AD) reactors was ... -
Potential of microalgae as a sustainable feed ingredient for aquaculture
Kumar, Gopalakrishnan; Nagappan, Senthil; Das, Probir; AbdulQuadir, Mohammad; Thaher, Mahmoud; Khan, Shoyeb; Mahata, Chandan; Al-Jabri, Hareb; Vatland, Ann Kristin (Peer reviewed; Journal article, 2021-09)An increase in fish consumption, combined with a decrease in wild fish harvest, is driving the aquaculture industry at rapid pace. Today, farmed seafood accounts for about half of all global seafood demand for human ... -
A review on energy and cost effective phase separated pretreatment of biosolids
Rajesh Banu, Banu; Poornima Devi, T.; Yukesh Kannah, Kannah; Kavitha, S.; Kim, Sang-Hyoun; Muñoz, Raul; Kumar, Gopalakrishnan (Peer reviewed; Journal article, 2021-06)Extracellular Polymeric Substances (EPS) existent in anaerobic sludge proves to be a barrier for sludge liquefaction and biomass lysis efficiency. Hence EPS deaggregation heightens the surface area for the subsequent ... -
A review on occurrence and spread of antibiotic resistance in wastewaters and in wastewater treatment plants: Mechanisms and perspectives
Uluseker, Cansu; Kaster, Krista Michelle; Thorsen, Kristian; Basiry, Daniel; Shobana, Sutha; Jain, Monika; Kumar, Gopalakrishnan; Kommedal, Roald; Pala-Ozkok, Ilke (Peer reviewed; Journal article, 2021-10)This paper reviews current knowledge on sources, spread and removal mechanisms of antibiotic resistance genes (ARGs) in microbial communities of wastewaters, treatment plants and downstream recipients. Antibiotic is the ... -
Spent Coffee Grounds (SCG) Valorization: Applications and Management Practices in the Stavanger Region
Bhatt, Neha (Masteroppgave/UIS-TN-IKBM/2020;, Master thesis, 2020-12)The environmental impact of food waste has been growing in interest among various environmental organizations as well as communities in the last decade. Coffee has been one of the largest consumed drinks worldwide that ... -
Spent coffee grounds anaerobic digestion: Investigating substrate to inoculum ratio and dilute acid thermal pretreatment
Semaan, Georgeio; Atelge, M.R.; Dune Cayetano, Roent; Kumar, Gopalakrishnan; Kommedal, Roald (Peer reviewed; Journal article, 2022)Spent coffee grounds have the potential of being used in further bioprocesses to produce materials and fuels. In Norway, the relative abundance and ease of collection of this waste substrate make it a candidate for ... -
Suitability and Effectiveness of Bioadsorbents for the Removal of Heavy Metals from Wastewater in Norway: A Qualitative Study
Khan, Mohammad Azim (Master thesis, 2021)The primary aim of this thesis was to investigate the process of biosorption and explore its suitability and effectiveness for use in Norway for the removal of heavy metals from wastewater. A qualitative assessment was ... -
Synthesis, characterization, and Batch adsorption analysis of Spent coffee grounds, Chitosan, and PVA composite beads for the removal of Cadmium and Lead from aqueous solutions.
Orquera Bugueño, Carolina Antonella (Master thesis, 2021)Adsorption of Cadmium and Lead in aqueous solutions by Spent coffee grounds/chitosan/PVA composite beads was studied. An adsorption Batch experimental model was used to determine the Isotherms and kinetics of 4 different ... -
Thermochemical splitting of CO2 using solution combustion synthesized lanthanum–strontium–manganese perovskites
Takalkar, Gorakshnath; Bhosale, Rahul R.; AlMomani, Fares; Rashid, Suliman; Qiblawey, Hazim; Saleh Saad, Mohammed Ali; Khraisheh, Majeda; Kumar, Gopalakrishnan; Gupta, Ram B.; Shende, Rajesh V. (Peer reviewed; Journal article, 2021-09)Redox reactivity of La(1-x)SrxMnO3 (LSM) perovskites towards a solar thermochemical CO2 splitting (CS) cycle is investigated. The LSM perovskites are synthesized via a solution combustion synthesis (SCS) method using glycine ...