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You searched for: Author "G. Venkata Subhash" Remove constraint Author: "G. Venkata Subhash"
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1. Challenges in microalgal biofuel production: A perspective on techno economic feasibility under biorefinery stratagem

Author:
G. Venkata Subhash,   et al.   ; Meghna Rajvanshi; G. Raja Krishna Kumar; Uma Shankar Sagaram; Venkatesh Prasad; Sridharan Govindachary; Santanu Dasgupta;     Show all 7 Authors
Source:
Bioresource technology 2022 v.343 pp. 126155
ISSN:
0960-8524
Subject:
algae culture; bio-feedstocks; biofuels; biorefining; economic feasibility; harvesting; microalgae; petroleum
Abstract:
... Rapidly exhausting fossil fuels combined with the ever-increasing demand for energy led to an ongoing search for alternative energy sources to meet the transportation, manufacturing, domestic and other energy demands of the grown population. Microalgae are at the forefront of alternative energy research due to their significant potential as a renewable feedstock for biofuels. However, microalgae p ...
DOI:
10.1016/j.biortech.2021.126155

2. Characterization of storage stability of microalgal biomass for its applications as protein feed ingredients in animal and aquafeeds

Author:
G. Venkata Subhash,   et al.   ; A.G. Waghmare; N. Chugh; U.S. Sagaram; S. Arun; D. Menon; V. Nagle; T. Dattaroy; S. Dasgupta;     Show all 9 Authors
Source:
Animal feed science and technology 2022 v.288 pp. 115323
ISSN:
0377-8401
Subject:
aflatoxins; animals; aquaculture feeds; bacteria; biomass; bulk density; cold storage; crude protein; feed industry; microalgae; microbial load; nutritive value; particle size; plate count; proximate composition; storage quality; water content
Abstract:
... Microalgae has recently attracted a significant interest as a sustainable source of nutrients for feed industry. Therefore, it is important to gain a comprehensive understanding on safety, physical and biochemical qualities, and storage stability of the microalgae products intended for use in feeds. This work is a time course evaluation of nutritional and safety parameters of microalgal biomass (P ...
DOI:
10.1016/j.anifeedsci.2022.115323

3. Electromagnetic stratagem to control predator population in algal open pond cultivation

Author:
G. Venkata Subhash,   et al.   ; Manjuladevi Rangappa; Sagarkumar Raninga; Venkatesh Prasad; Santanu Dasgupta; G. Raja Krishna Kumar;     Show all 6 Authors
Source:
Algal research 2019 v.37 pp. 133-137
ISSN:
2211-9264
Subject:
Protozoa; algae; bacteria; biomass production; electric potential difference; electrodes; pH; ponds; predators; salinity; temperature
Abstract:
... Large scale cultivation of algae is becoming a major challenge due to the impact of biotic (grazers and predators) and abiotic (salinity, light, temperature and pH) stress factors on growth and biomass productivity. Historically, to control grazers and predators, various physical, chemical and biological methods have been used which have had detrimental effects on algae growth and environment. Con ...
DOI:
10.1016/j.algal.2018.11.014

4. Application of in vitro protein solubility for selection of microalgae biomass as protein ingredient in animal and aquafeed

Author:
G. Venkata Subhash,   et al.   ; Neera Chugh; Supriya Iyer; Ashish Waghmare; Amar S. Musale; Rajesh Nandru; Rakhi Bajpai Dixit; Mahadev S. Gaikwad; Deepthi Menon; Rakesh Thorat; G.Raja Krishna Kumar; Vinod Nagle; Uma Shankar Sagaram; Santanu Dasgupta;     Show all 14 Authors
Source:
Journal of applied phycology 2020 v.32 no.6 pp. 3955-3970
ISSN:
0921-8971
Subject:
Chlorella; Nannochloris; Nannochloropsis; algology; animals; aquaculture; aquaculture feeds; digestibility; digestible protein; feed composition; feed industry; fish meal; greenhouses; ingredients; lipids; microalgae; protein solubility; soy flour; trypsin
Abstract:
... Microalgae when grown under certain conditions can be rich sources of protein and can complement conventional protein sources like fishmeal and soymeal, in the aquaculture and animal feed industry. In this study, evaluation of four marine microalgae strains (Picochlorum sp., Nannochloris sp., Nannochloropsis sp., and Chlorella sp.) revealed that in vitro protein solubility and digestibility may se ...
DOI:
10.1007/s10811-020-02235-9

5. Carbon streaming in microalgae: extraction and analysis methods for high value compounds

Author:
G. Venkata Subhash,   et al.   ; Meghna Rajvanshi; B. Navish Kumar; Sridharan Govindachary; Venkatesh Prasad; Santanu Dasgupta;     Show all 6 Authors
Source:
Bioresource technology 2017 v.244 pp. 1304-1316
ISSN:
0960-8524
Subject:
biofuels; carbohydrates; carbon; carbon dioxide; high-value products; lipids; microalgae; pigments; proteins; seawater; wastewater
Abstract:
... There is a growing recognition that carbon-neutral biofuels and microalgae are eco-friendly options because of their high CO2 sequestering capability and ability to grow in wastewater/sea water and non-arable land. Also the intrinsic properties of microalgal systems can be exploited for high value compounds such as carbohydrates, lipids, pigments and proteins. This article provides a comprehensive ...
DOI:
10.1016/j.biortech.2017.07.024

6. Microalgae mediated bio-electrocatalytic fuel cell facilitates bioelectricity generation through oxygenic photomixotrophic mechanism

Author:
G. Venkata Subhash,   et al.   ; Rashmi Chandra; S. Venkata Mohan;     Show all 3 Authors
Source:
Bioresource technology 2013 v.136 pp. 644-653
ISSN:
0960-8524
Subject:
biomass; carbon; chlorophyll; dissolved oxygen; electron transfer; enzymes; fuel cells; harness; microalgae; photolysis; photosynthesis; photosynthetic bacteria; wastewater
Abstract:
... Electrogenic activity of oxygenic photo-bioelectrocatalytic fuel cell (PhFCOX) under mixotrophic mode was evaluated using atmospheric CO2 and domestic wastewater as carbon sources for harnessing bioelectricity with mixed microalgae as anodic biocatalyst. PhFCOX operation showed good electrogenic activity (3.55μW/m2) associated with higher biomass growth (2.87g/l) and chlorophyll content (5.12mg/l) ...
DOI:
10.1016/j.biortech.2013.02.035
PubMed:
23570712

7. Closed circuitry operation influence on microbial electrofermentation: Proton/electron effluxes on electro-fuels productivity

Author:
G. Venkata Subhash,   et al.   ; G.N. Nikhil; Dileep Kumar Yeruva; S. Venkata Mohan;     Show all 4 Authors
Source:
Bioresource technology 2015 v.195 pp. 37-45
ISSN:
0960-8524
Subject:
bacteria; biocatalysts; electricity; electron transfer; hydrogen; hydrogen production; metabolism; proteins; renewable energy sources; wastewater treatment
Abstract:
... A novel biocatalyzed electrofermentor (BEF) was designed which uncovers the intricate role of biocatalyst involved in cogeneration of electro-fuels (hydrogen and electricity). The specific role of external resistance (Rext, electrical load) on the performance of BEF was evaluated. Four BEFs were operated separately with different resistances (25, 50, 100 and 200Ω) at an organic load of 5g/L. Among ...
DOI:
10.1016/j.biortech.2015.06.004

8. Synergistic yield of dual energy forms through biocatalyzed electrofermentation of waste: Stoichiometric analysis of electron and carbon distribution

Author:
G. Venkata Subhash,   et al.   ; G.N. Nikhil; Dileep Kumar Yeruva; S. Venkata Mohan;     Show all 4 Authors
Source:
Energy 2015 v.88 pp. 281-291
ISSN:
0360-5442
Subject:
bacteria; biocatalysis; biochemical pathways; bioelectricity; biohydrogen; buffering capacity; carbon; electrodes; electron transfer; empirical research; energy; enzyme activity; fermentation; functional properties; hydrogen production; microbial fuel cells; prototypes; remediation; wastewater; wastewater treatment
Abstract:
... A novel BEF (biocatalyzed electrofermentor) is designed by hybridizing the functional properties of both MFC (microbial fuel cell) and acidogenic fermentation process (AFP). This prototype facilitates potential synergy between the electrogenic and acidogenic processes to recover biohydrogen and bioelectricity with simultaneous wastewater treatment. The BEF was operated in three circuitry modes of ...
DOI:
10.1016/j.energy.2015.05.043

9. Biodiesel production from isolated oleaginous fungi Aspergillus sp. using corncob waste liquor as a substrate

Author:
G. Venkata Subhash,   et al.   ; S. Venkata Mohan;     Show all 2 Author
Source:
Bioresource technology 2011 v.102 no.19 pp. 9286-9290
ISSN:
0960-8524
Subject:
Aspergillus; acid value; biodiesel; biomass production; corn cobs; enzymes; fatty acid composition; glucose; iodine value; oleaginous fungi; saturated fatty acids; transesterification; unsaturated fatty acids; waste liquors
Abstract:
... The study documented the potential of isolated filamentous fungus Aspergillus sp. as whole cell biocatalyst for biodiesel production using Sabourauds dextrose broth medium (SDBM) and corncob waste liquor (CWL) as substrates. SDBM showed improvement in both biomass production (13.6g dry weight/1000ml) and lipid productivity (23.3%) with time. Lipid extraction was performed by direct (DTE) and indir ...
DOI:
10.1016/j.biortech.2011.06.084
PubMed:
21778051

10. Relative effect of different inorganic acids on selective enrichment of acidogenic biocatalyst for fermentative biohydrogen production from wastewater

Author:
G. Venkata Subhash,   et al.   ; Omprakash Sarkar; R. Kannaiah Goud; S. Venkata Mohan;     Show all 4 Authors
Source:
Bioresource technology 2013 v.147 pp. 321-331
ISSN:
0960-8524
Subject:
Firmicutes; acetic acid; bacteria; bioreactors; chemical oxygen demand; fermentation; hydrogen; hydrogen production; inoculum; inorganic acids; pretreatment; wastewater
Abstract:
... The effect of different inorganic acids viz., HNO₃, HCl, H₂SO₄ and H₃PO₄ on inoculum pretreatment to selectively enrich hydrogen (H₂) producing acidogenic bacteria was evaluated in anaerobic sequencing batch bioreactors. Relative positive efficiency of HNO₃ pretreated consortia in enhancing H₂ production (11.85molH₂/kgCODR) was noticed compared to other acids (HCl, 5.64molH₂/kgCODR; H₂SO₄, 7.65mol ...
DOI:
10.1016/j.biortech.2013.08.021
PubMed:
24001561

11. Heterotrophic cultivation of mixed microalgae for lipid accumulation and wastewater treatment during sequential growth and starvation phases: Effect of nutrient supplementation

Author:
G. Venkata Subhash,   et al.   ; M. Prathima Devi; S. Venkata Mohan;     Show all 3 Authors
Source:
Renewable energy 2012 v.43 no. pp. 276-283
ISSN:
0960-1481
Subject:
Bacillariophyceae; Chlorella; Scenedesmus; biocatalysts; biodiesel; biomass; carbon; fatty acid composition; microalgae; nitrogen; nutrients; phosphorus; potassium; saturated fatty acids; starvation; wastewater; wastewater treatment
Abstract:
... Microalgae are deemed to be a potential biocatalyst for the production of biodiesel along with other valuable products. An attempt was made to evaluate the effect of sequential growth phase (GP) and starvation phase (SP) on the lipid productivity of heterotrophically grown mixed microalgae using domestic wastewater as substrate/feed-stock. Effect of nutrients viz., nitrogen (N), phosphorus (P), ca ...
DOI:
10.1016/j.renene.2011.11.021

12. Mixotrophic operation of photo-bioelectrocatalytic fuel cell under anoxygenic microenvironment enhances the light dependent bioelectrogenic activity

Author:
G. Venkata Subhash,   et al.   ; Rashmi Chandra; S. Venkata Mohan;     Show all 3 Authors
Source:
Bioresource technology 2012 v.109 no. pp. 46-56
ISSN:
0960-8524
Subject:
photosynthetic bacteria; acetates; energy; electrons; fuel cells; volatile fatty acids; enzymes; wastewater; wastewater treatment; electrodes; photosynthesis; biomass; chlorophyll; pigments
Abstract:
... Electrogenic activity of photo-bioelectrocatalytic /photo-biological fuel cell (PhFC) was evaluated in a mixotrophic mode under anoxygenic microenvironment using photosynthetic consortia as biocatalyst. An acetate rich wastewater was used as anolyte for harnessing energy along with additional treatment. Mixotrophic operation facilitated good electrogenic activity and wastewater treatment associate ...
DOI:
10.1016/j.biortech.2011.12.135
PubMed:
22297047

13. Temperature induced stress influence on biodiesel productivity during mixotrophic microalgae cultivation with wastewater

Author:
G. Venkata Subhash,   et al.   ; M.V. Rohit; M. Prathima Devi; Y.V. Swamy; S. Venkata Mohan;     Show all 5 Authors
Source:
Bioresource technology 2014 v.169 pp. 789-793
ISSN:
0960-8524
Subject:
biodiesel; biomass; chemical oxygen demand; lipid content; microalgae; municipal wastewater; saturated fatty acids; temperature; unsaturated fatty acids
Abstract:
... The role of operating temperature as a physical stress factor for enhancing lipid induction during microalgae cultivation with domestic wastewater was evaluated. Experiments were designed with dual mode microalgae cultivation viz., growth phase (GP) and temperature induced stress phase (25°C, 30°C and 35°C). GP showed enhancement in biomass growth and carbohydrate accumulation while stress phase ( ...
DOI:
10.1016/j.biortech.2014.07.019

14. Bio-electrolytic conversion of acidogenic effluents to biohydrogen: An integration strategy for higher substrate conversion and product recovery

Author:
G. Venkata Subhash,   et al.   ; M. Lenin Babu; P.N. Sarma; S. Venkata Mohan;     Show all 4 Authors
Source:
Bioresource technology 2013 v.133 pp. 322-331
ISSN:
0960-8524
Subject:
biohydrogen; denaturing gradient gel electrophoresis; effluents; electric current; enzymes; fermentation; hydrogen production; volatile fatty acids
Abstract:
... Feasibility of integrating Microbial electrolysis cell (MEC) process with dark-fermentation process for additional hydrogen recovery as well as substrate degradation was demonstrated in the present study. MEC was employed in order to utilize the residual organic fraction present in the acidogenic effluents of dark fermentation process as substrate for hydrogen production with input of small electr ...
DOI:
10.1016/j.biortech.2013.01.029
PubMed:
23434809

15. Bioaugmentation of an electrochemically active strain to enhance the electron discharge of mixed culture: process evaluation through electro-kinetic analysis

Author:
G. Venkata Subhash,   et al.   ; S. Veer Raghavulu; P. Suresh Babu; R. Kannaiah Goud; S. Srikanth; S. Venkata Mohan;     Show all 6 Authors
Source:
RSC advances 2011 v.2 no.2 pp. 677-688
ISSN:
2046-2069
Subject:
Haliotis; Shewanella; bacteria; bioaugmentation; biocatalysts; capacitance; electrochemistry; electron transfer; microbial fuel cells; mixed culture; power generation
Abstract:
... The functional role of electrochemically active bacteria (EAB), Shewanella haliotis ATCC 49138 as biocatalyst for bioaugmentation onto anodic native microflora (anaerobic) was evaluated to enhance the electrogenic activity of microbial fuel cell (MFC). Fuel cell operation with S. haliotis (MFC-S) alone as anodic biocatalyst showed relatively higher power output (295 mV; 2.13 mA at 100 Ω) than mixe ...
DOI:
10.1039/c1ra00540e