Patents/Research papers/Book Chapters

Patents: (filed/granted)

1. Indian Patent filed on “Hybrid biofilm-suspended photobioreactor for high density algae cultivation” Inventors: Prajapati, S.K., Rana, M. S. (Application no 202011028602, Dated 17/06/2021)
2. Indian Patent (provisional) filed on “A process for algal spent recycling and metabolites production “Inventors: Prajapati, S.K., Rana, M. S.  (Application no. 202111043885 dated 28/09/2021)
3. Indian Patent granted on A method of bio-harvesting and pre-treating algal biomass and uses thereof; Inventors: Malik, A., Prajapati, S.K., Vijay, V.K., Bhattacharya, A. (No. 324527, dated 06/11/2019)

Refereed Journal Publications: Corresponding author is marked with “*”

1. Tiwari, H.; Prajapati, S. K*., "Synthesis of Microalgal Photogranules for Hydroponics Effluent Treatment." ACS ES&T Water, 2025, 5(8), 4715-4728. https://doi.org/10.1021/acsestwater.5c00417
2. Tiwari, H., Prajapati, S. K*., "Insights on the Use of Activated Sewage Sludge for Microalgae Harvesting and Improved Biogas Production." ACS Sustainable Resource Management, 2025, 2(6), 985-992. https://doi.org/10.1021/acssusresmgt.5c00014
3. Chauhan, A.; Prajapati, S. K*., "Role of plant-specific microbial communities and functional genes in wastewater treatment via vertical flow constructed wetlands." Journal of Environmental Chemical Engineering, 2025, 13(4), 117269. https://doi.org/10.1016/j.jece.2025.117269 (Q1, IF: 7.2)
4. Chand, N.; Krause, S.; Prajapati, S. K*., "The potential of microplastics acting as vector for triclosan in aquatic environments." Aquatic Toxicology, 2025, 284, 107381. https://doi.org/10.1016/j.aquatox.2025.107381 (Q1, IF: 4.3)
5. Chand, N.; Prajapati, S. K*. "Fate and transport of silver nanoparticles in constructed wetlands." Journal of Cleaner Production, 2025, 489, 144719. https://doi.org/10.1016/j.jclepro.2025.144719 (Q1, IF: 11.1)
6. Bhatt, A., Arora, P., Prajapati, S. K*. “Unveiling mechanistic intricacies of Chlorella pyrenoidosa-mediated pathogen removal from sewage” npj Clean Water 7, 116 (2024). https://doi.org/10.1038/s41545-024-00411-9
7. Rana, M. S.; Ariyadasa, T. U.; Prajapati, S. K*. "Effect of iron oxide nanoparticles on mixotrophic cultivation of Chlorella spp. for biofuel production." Bioresource Technology, 2024, 410, 131241. https://doi.org/10.1016/j.biortech.2024.131241 (Q1, IF: 9)
8. Verma, A., Chand, N., Upadhyay, P., Sharma, S., Prajapati, S.K*. Systematic review on microplastics as a threat to terrestrial and aquatic eco-environment. Sustainable Chemistry One World. https://doi.org/10.1016/j.scowo.2024.100013
9. Tiwari, H.; Prajapati, S. K*. "Use of microalgal-fungal pellets for hydroponics effluent recycling and high-value biomass production." Heliyon, 2024, 10(18), e37539. https://doi.org/10.1016/j.heliyon.2024.e37539
10. Upadhyay, P.; Prajapati, S. K*.; Kumar, A. "Deciphering carbon dioxide fluxes and interactions in the Ganga River Basin of South Asia." Environmental Research, 2024, 252, 118902. https://doi.org/10.1016/j.envres.2024.118902 (Q1, IF: 8.431)
11. Rana, M. S.; Ariyadasa, T. U.; Prajapati, S. K*. "Effect of iron oxide nanoparticles on mixotrophic cultivation of Chlorella spp. for biofuel production." Bioresource Technology, 2024, 410, 131241 https://doi.org/10.1016/j.biortech.2024.131241 (Q1, IF: 11.889)
12. Bhandari, M.; Kharkwal, S.; Prajapati, S. K*. "Bicarbonate-assisted microalgae cultivation for drinking water RO reject recycling and bioproduct generation." Bioresource Technology Reports, 2024, 25, 101756. https://doi.org/10.1016/j.biteb.2023.101756
13. Bai, A.; Balogh, P.; Nagy, A.; Csedő, Z.; Sinóros-Szabó, B.; Pintér, G.; Prajapati, S. K*.; Singh, A.; Gabnai, Z. "Economic Evaluation of a 1 MWel Capacity Power-to-Biomethane System." Energies, 2023, 16(24), 8009. https://doi.org/10.3390/en16248009
14. Bhatt, A.; Sahu, N.; Dada, A. C.; Prajapati, S. K*.; Arora, P. "Assessing sustainability of microalgae-based wastewater treatment: Environmental considerations and impacts on human health." Journal of Environmental Management, 2024, 354, 120435. https://doi.org/10.1016/j.jenvman.2024.120435 (Q1, IF: 8.4)
15. Tiwari, H.; Prajapati, S. K*. "Hydroponics Effluent Recycling for Bioenergy Using Microalgae." In Proceedings from the International Conference on Hydro and Renewable Energy (ICHRE 2022), 2024; pp 319–325. Springer Nature Singapore. https://doi.org/10.1007/978-981-99-6616-5_36
16. Bhushan, S.; Jayakrishnan, U.; Johnson, N.; Prajapati, S. K*.; Lakshan, K. A. S.; Kaphle, K.; Eshkabilov, S.; Simsek, H. "UV-C pretreatment of wastewater-grown algal biomass for recover of biofuel precursors." Journal of Environmental Chemical Engineering, 2024, 12(2), 112087. https://doi.org/10.1016/j.jece.2024.112087 (Q1, IF: 7.2)
17. Bhandari, M.; Kumar, P.; Bhatt, P.; Simsek, H.; Kumar, R.; Chaudhary, A.; Malik, A.; Prajapati, S. K*. "An integration of algae-mediated wastewater treatment and resource recovery through anaerobic digestion." Journal of Environmental Management, 2023, 331, 118159. https://doi.org/10.1016/j.jenvman.2023.118159 (Q1, IF: 8.4)
18. Nishshanka, G. K. S. H.; Thevarajah, B.; Nimarshana, P. H. V.; Prajapati, S. K*.; Ariyadasa, T. U. "Real-time integration of microalgae-based bioremediation in conventional wastewater treatment plants: Current status and prospects." Journal of Water Process Engineering, 2023, 56, 104248. https://doi.org/10.1016/j.jwpe.2023.104248 (Q1, IF: 7.340)
19. Upadhyay, P.; Prajapati, S. K*.; K. A. "Impacts of riverine pollution on greenhouse gas emissions: A comprehensive review." Ecological Indicators, 2023, 155, 110649. https://doi.org/10.1016/j.ecolind.2023.110649 (Q1, IF: 7.4)
20. Tiwari, H.; Prajapati, S. K.  "Photosynthetic bioconversion of hydroponic effluent into biochemical-rich biomass for microalgal biorefineries." Environ. Sci.: Water Res. Technol., 2023, 9, 2692-2705. https://doi.org/10.1039/D3EW00327B (Q1, IF: 5.0)
21. Upadhyay, P.; Prajapati, S. K*.; Kumar, A. "Impacts of riverine pollution on greenhouse gas emissions: A comprehensive review." Ecological Indicators, 2023, 155, 110649. https://doi.org/10.1016/j.ecolind.2023.110649 (Q1, IF: 6.9)
22. Bhushan, S.; Eshkabilov, S.; Jayakrishnan, U.; Prajapati, S. K.; Simsek, H. "A comparative analysis of growth kinetics, image analysis, and biofuel potential of different algal strains." Chemosphere, 2023, 336, 139196. https://doi.org/10.1016/j.chemosphere.2023.139196 (Q1, IF: 8.943)
23. Singh, A., Anand, V., Bai. A., Gabnai, Z., Prajapati, S. K.* (2023) Waste algae for bioenergy generation to mitigate eutrophication and greenhouse emissions in water bodies. Periodica Polytechnica Chemical Engineering. https://doi.org/10.3311/PPch.22005 (Q2, IF: 1.744)
24. Bhatt, A., Arora, P., Prajapati, S. K*.,  (2023) Chlorella pyrenoidosa-mediated removal of pathogenic bacteria from municipal wastewater–multivariate process optimization and application in the real sewage Journal of Environmental Chemical Engineering, 109494 https://doi.org/10.1016/j.jece.2023.109494  (Q1, IF: 7.968)
25. Bhandari, M., Kharkwal, S., Prajapati, S. K.* (2022). Recycling drinking water RO reject for microalgae-mediated resource recovery. Resources, Conservation and Recycling 188, 106699. https://doi.org/10.1016/j.resconrec.2022.106699 (Q1, IF: 13.716)
26. Rana, M. S.,  Prajapati, S. K.* (2022). Multifarious applications of nanoparticles in microalgae for bioenergy generation: State-of-the-art review. Journal of Environmental Chemical Engineering, 109145. https://doi.org/10.1016/j.jece.2022.109145 (Q1, IF: 7.968)
27. Singh, A., Rana, M. S., Tiwari, H., Kumar, M., Saxena, S., Anand, V., & Prajapati, S. K.* (2022). Anaerobic digestion as a tool to manage eutrophication and associated greenhouse gas emission. Science of The Total Environment, 861, 160722. https://doi.org/10.1016/j.scitotenv.2022.160722 (Q1, IF: 10.75)
28. Kumar, A.*, Upadhyay, P.,  Prajapati, S. K. (2022). Impact of microplastics on riverine greenhouse gas emissions: a view point. Environmental Science and Pollution Research, 1-4. https://doi.org/10.1007/s11356-022-23929-2 (Q1, IF: 5.190)
29. Tiwari, H.,  Prajapati, S. K. (2022) *. Allelopathic effect of benzoic acid (hydroponics root exudate) on microalgae growth. Environmental Research, 115020. https://doi.org/10.1016/j.envres.2022.115020 (Q1, IF: 8.431)
30. Bhatt, A., Dada, A. C., Prajapati, S. K.,  Arora, P. (2022). Integrating life cycle assessment with quantitative microbial risk assessment for a holistic evaluation of sewage treatment plant. Science of The Total Environment, 160842. https://doi.org/10.1016/j.scitotenv.2022.160842  (Q1, IF: 10.753)
31. Singhal, S., Agarwal, S., Kumar, A., Kumar, V., Prajapati, S. K., Kumar, T., Singhal, N. (2022). Waste Clothes to Microcrystalline Cellulose: An Experimental Investigation. J.  Polymers and the Environment, 1-15. https://doi.org/10.1007/s10924-022-02609-9 (Q1, IF: 4.93)
32. David, G., Rana, M. S., Saxena, S., Sharma, S., Pant, D.,  Prajapati, S. K.* (2022). A review on design, operation, and maintenance of constructed wetlands for removal of nutrients and emerging contaminants. International Journal of Environmental Science and Technology, 1-22. https://link.springer.com/article/10.1007/s13762-022-04442-y (Q1, IF: 3.519)
33. Bhatt, A., Khanchandani, M., Rana, M.S., Prajapati, S.K.* (2022). Techno-economic analysis of microalgae cultivation for commercial sustainability: a state-of-the-art review. Journal of Cleaner Production, 370, 133456. https://doi.org/10.1016/j.jclepro.2022.133456  (Q1, IF: 11.072)
34. Rana, M. S., Prajapati, S. K.* (2022). Mixotrophic microalgal-biofilm reactor augmenting biomass and biofuel productivity. Bioresource Technology, 127306. https://doi.org/10.1016/j.biortech.2022.127306  (Q1, IF: 11.889)
35. Bhandari, M., Prajapati, S. K.* (2022). Use of reverse osmosis reject from drinking water plant for microalgal biomass production. Water Research, 210, 117989. https://doi.org/10.1016/j.watres.2021.117989(Q1, IF: 13.400)
36. Rana, M. S., Prajapati, S. K.* (2021). Stimulating effects of glycerol on the growth, phycoremediation and biofuel potential of Chlorella pyrenoidosa cultivated in wastewater. Environmental Technology & Innovation, 24, 102082. https://doi.org/10.1016/j.eti.2021.102082 (Q1, IF: 7.758)
37. Rana, M. S., Prajapati, S. K.* (2021). Resolving the dilemma of iron bioavailability to microalgae for commercial sustenance. Algal Research, 59, 102458. https://doi.org/10.1016/j.algal.2021.102458 (Q1, IF: 5.276)
38. Rana, M.S., Prajapati, S.K.* (2021). Microwave-assisted pretreatment of wet microalgal biomass for recovery of biofuel precursors. Fuel, 305, 121610. https://doi.org/10.1016/j.fuel.2021.121610 (Q1, IF: 8.035)
39. Bhushan, S., Rana, M.S., Bhandari, M., Sharma, A.K., Simsek, H., Prajapati, S.K.* (2021). Enzymatic pretreatment of algal biomass has different optimal conditions for biogas and bioethanol routes. Chemosphere 284, 131264. https://doi.org/10.1016/j.chemosphere.2021.131264 (Q1, IF: 8.943)
40. Mamta, Rana, M.S., Sharma, A.K., Parambil, J.V., Prajapati, S.K* (2021). Potential of reverse osmosis reject water as a growth medium for the production of algal metabolites–A state-of-the-art review. Journal of Water Process Engineering, 40, 101849, https://doi.org/10.1016/j.jwpe.2020.101849. (Q1, IF: 7.340)
41. Biswas, T., Bhushan, S., Prajapati, S.K* Chaudhuri, S. R (2021) An eco-friendly strategy for dairy wastewater remediation with high lipid microalgae-bacterial biomass production. Journal of Environmental Management 286, 112196. https://doi.org/10.1016/j.jenvman.2021.112196 (Q1, IF: 8.910)
42. Kalia, S., Bhattacharya, A., Prajapati, S. K., & Malik, A. (2021). Utilization of starch effluent from a textile industry as a fungal growth supplement for enhanced α-amylase production for industrial application. Chemosphere, 279, 130554. https://doi.org/10.1016/j.chemosphere.2021.130554 (Q1, IF: 8.943)
43. Rana, M.S, Bhushan, S., Prajapati, S.K* (2020). New insights on improved growth and biogas production potential of Chlorella pyrenoidosa through intermittent iron oxide nanoparticle supplementation. Scientific Reports- Nature 1, 14119. https://doi.org/10.1038/s41598-020-71141-4 (Q1, IF: 4.996)
44. Bhatt, A., Arora, P., Prajapati, S.K* (2020). Occurrence, fates and potential treatment approaches for removal of viruses from wastewater: A review with emphasis on SARS-CoV-2. Journal of Environmental Chemical Engineering, 8(5), 104429. https://doi.org/10.1016/j.jece.2020.104429 (Q1, IF: 7.968)
45. Bhatt, A., Arora, P., Prajapati, S.K* (2020). Can algal derived bioactive metabolites serve as potential therapeutics for the treatment of SARS-CoV-2 like viral infection? Frontiers in Microbiology, 11, 596374. https://doi.org/10.3389/fmicb.2020.596374 (Q1, IF: 6.064)
46. Rana, M. S., Bhushan, S., Sudhakar, D. R., Prajapati, S. K*. (2020). Effect of iron oxide nanoparticles on growth and biofuel potential of Chlorella spp. Algal Research, 49, 101942. https://doi.org/10.1016/j.algal.2020.101942   (Q1, IF: 5.276)
47. Bhushan, S., Kalra, A., Simsek, H., Kumar, G., Prajapati, S. K*. (2020). Current trends and prospects in microalgae-based bioenergy production. Journal of Environmental Chemical Engineering, 104025. https://doi.org/10.1016/j.jece.2020.104025  (Q1, IF: 7.968)
48. Kumar, P., Bhattacharya, A., Prajapati, S. K., Malik, A., & Vijay, V. K. (2020) Anaerobic co-digestion of waste microalgal biomass with cattle dung in a pilot-scale reactor: effect of seasonal variations and long-term stability assessment. Biomass Conversion and Biorefinery. https://doi.org/10.1007/s13399-020-00778-y (Q2, IF: 4.050)
49. Bhushan, S., Rana, M. S., Mamta, Nandan, N., Prajapati, S. K*. (2019). Energy harnessing from banana plant wastes – A review. Bioresource Technology Reports, 100212. https://doi.org/10.1016/j.biteb.2019.100212  (Q1, Cite score: 6.3)
50. Kumar, P., Prajapati, S.K.*, Malik, A., Vijay, V.K., (2019). Evaluation of biomethane potential of waste algal biomass collected from eutrophied lake: effect of source of inocula, co-substrate, and VS loading. Journal of Applied Phycology 31, 533–545. https://doi.org/10.1007/s10811-018-1585 (Q2, IF: 3.404)
51. Thawani, M., Hans, N., Samuchiwal, S., Prajapati, S.K.*, (2018). Improved methane yield from wastewater grown algal biomass. Water Science and Technology 78, 81–91. https://doi.org/10.2166/wst.2018.029 (Q2, IF: 2.430)
52. Kumar, P., Prajapati, S.K.*, Malik, A., Vijay, V.K., (2017). Cultivation of native algal consortium in semi-continuous pilot scale raceway pond for greywater treatment coupled with potential methane production. Journal of Environmental Chemical Engineering 5, 5581–5587. https://doi.org/10.1016/j.jece.2017.10.044 (Q1, IF: 7.968)
53. Bhattacharya, A., Mathur, M., Kumar, P., Prajapati, S.K., Malik, A., (2017). A rapid method for fungal assisted algal flocculation: Critical parameters & mechanism insights. Algal Research. 21, 42–51. https://doi.org/10.1016/j.algal.2016.10.022 (Q1, IF: 5.273)
54. Choudhary, P., Prajapati, S.K., Kumar, P., Malik, A., Pant, K.K., (2017). Development and performance evaluation of an algal biofilm reactor for treatment of multiple wastewaters and characterization of biomass for diverse applications. Bioresource Technology 224, 276–284. https://doi.org/10.1016/j.biortech.2016.10.078 (Q1, IF: 11.889)
55. Choudhary, P., Prajapati, S.K., Malik, A., (2016). Screening native microalgal consortia for biomass production and nutrient removal from rural wastewaters for bioenergy applications. Ecological Engineering 91, 221–230. https://doi.org/10.1016/j.ecoleng.2015.11.056 (Q1, IF: 4.379)
56. Hammed, A.M., Prajapati, S.K., Simsek, S., Simsek, H., (2016). Growth regime and environmental remediation of microalgae. Algae 31, 189–204. https://doi.org/10.4490/algae.2016.31.8.28 (Q1, IF: 2.75)
57. Prajapati, S.K., Bhattacharya, A., Kumar, P., Malik, A., Vijay, V.K., (2016). A method for simultaneous bioflocculation and pretreatment of algal biomass targeting improved methane production. Green Chemistry 18, 5230–5238. https://doi.org/10.1039/C6GC01483F (Q1, IF: 11.034)
58. Prajapati, S.K., Bhattacharya, A., Malik, A., Vijay, V.K., (2015). Pretreatment of algal biomass using fungal crude enzymes. Algal Research 8, 8–14. https://doi.org/10.1016/j.algal.2014.12.011 (Q1, IF: 5.273)
59. Prajapati, S.K., Malik, A., Vijay, V.K., Sreekrishnan, T.R., (2015). Enhanced methane production from algal biomass through short duration enzymatic pretreatment and codigestion with carbon rich waste. RSC Advances 5, 67175–67183. https://doi.org/10.1039/c5ra12670c (Q1, IF: 4.036)
60. Prajapati, S.K., Choudhary, P., Malik, A., Vijay, V.K., (2014). Algae mediated treatment and bioenergy generation process for handling liquid and solid waste from dairy cattle farm. Bioresource Technology 167, 260–268. https://doi.org/10.1016/j.biortech.2014.06.038 (Q1, IF: 11.899)
61. Prajapati, S.K., Kumar, P., Malik, A., Choudhary, P., (2014). Exploring Pellet Forming Filamentous Fungi as Tool for Harvesting Non-flocculating Unicellular Microalgae. Bioenergy Research 7, 1430–1440. https://doi.org/10.1007/s12155-014-9481-1 (Q2, IF: 3.852)
62. Prajapati, S.K., Kumar, P., Malik, A., Vijay, V.K., (2014). Bioconversion of algae to methane and subsequent utilization of digestate for algae cultivation: A closed loop bioenergy generation process. Bioresource Technology 158, 174–180. https://doi.org/10.1016/j.biortech.2014.02.023 (Q1, IF: 11.899)
63. Prajapati, S.K., Malik, A., Vijay, V.K., (2014). Comparative evaluation of biomass production and bioenergy generation potential of Chlorella spp. through anaerobic digestion. Applied Energy 114, 790–797. https://doi.org/10.1016/j.apenergy.2013.08.021 (Q1, IF: 11.449)
64. Prajapati, S.K., Kaushik, P., Malik, A., Vijay, V.K., (2013). Phycoremediation coupled production of algal biomass, harvesting and anaerobic digestion: Possibilities and challenges. Biotechnology Advances 31, 1408–1425. https://doi.org/10.1016/j.biotechadv.2013.06.005 (Q1, IF: 17.681)
65. Prajapati, S.K., Kaushik, P., Malik, A., Vijay, V.K., (2013). Phycoremediation and biogas potential of native algal isolates from soil and wastewater. Bioresource Technology 135, 232–238. https://doi.org/10.1016/j.biortech.2012.08.069 (Q1, IF: 11.889)
66. Prajapati, S. K.,   P. Choudhary, Choudhary, P., Chawla, P., Malik, A., Vijay, V. K. (2014). Apshisht jal ainvam crabon di oxide ke pabandhan tatha biogas utpadan me shaival ki bhumika. Jigyasa (IIT Delhi) 27&28: 98-103
67. Prajapati, S. K., Choudhary, P., Chawla, P., Sharma, G., Malik, A., Vijay, V. K. Sharma, S., Sreekrishnan, T. R. (2012). Shaival ke Bahumukhi Upyog (Vaijyanic Samiksha), Jigyasa (IIT Delhi) 25: 112 – 5.
68. Prajapati, S. K., Choudhary, P., Chawla, P., Sharma, G., Malik, A., Vijay, V. K. Sharma, S., Sreekrishnan, T. R. (2012). Chlorella minutissima shaival: Apshisht jal pravandhan ainvam biogas utpadan., Jigyasa (IIT Delhi) 25: 139 – 41

Book chapters

1. Upadhyay, S.; Pant, T.; Tiwari, H.; Upadhyay, P.; Prajapati, S. K*. "Water footprint assessment in wastewater treatment plants: a way's toward practical engineering solution." In Water Footprints: Achieving Sustainable Development Goals, 2025, pp 233-242 Elsevier
2. Kumar, M.; Chand, N.; Prajapati, S. K*. "Constructed Wetlands Coupled with Microbial Fuel Cells for Bioelectricity Generation Possible Applications and Challenges." In Nature-Based Wastewater Treatment Systems, 1st ed.; 2024; pp 14 CRC Press
3. Bhatt, A., Shandilya, J., Singal, S.K., Prajapati, S. K (2023) Application of Genetically Modified Microorganisms for Bioremediation of Heavy Metals from Wastewater in Genomics Approach to Bioremediation: Principles, Tools, and Emerging Technologies, Publisher: Wiley (In-press)
4. Chauhan, A., Prajapati, S.K^* (2022) Algae coupled constructed wetland system for wastewater treatment. In Integrated Environmental Technologies for Wastewater Treatment and Sustainable Development (pp. 191-216) Elsevier
5. Bhatt, A., Arora, P., Prajapati, S.K  (2022) Assessing algae-based wastewater treatment - a Life Cycle Assessment approach. In Clean Energy and Resource Recovery (pp. 137-154) Elsevier.
6. Mamta, Bhushan, S., Rana, M.S., Raychaudhuri S., Simsek, H., Prajapati, S.K* (2020) Algae and bacteria-driven technologies for pharmaceutical remediation in wastewater. In Removal of Toxic Pollutants Through Microbiological and Tertiary Treatment (pp. 373 – 408). Elsevier
7. Chhaya, Raychoudhury, T., & Prajapati, S. K*. (2020). Bioremediation of Pharmaceuticals in Water and Wastewater. In Microbial Bioremediation & Biodegradation (pp. 425-446). Springer
8. Rana, M. S., Bhushan, S., Prajapati, S. K.*, & Kavitha, S. (2020). Techno-economic analysis and environmental aspects of food waste management. In Food Waste to Valuable Resources (pp. 325-342). Academic Press.
9. Bhushan S., Ashwin K, Simsek H, Swati S and Prajapati SK* (2018). Algal-bacterial processes for wastewater remediation: Application of Microalgae in Wastewater Treatment, Springer Nature.
10. Dubey A., Mishra V., Prajapati S. K, Ahmed S. U., Goswami, M. Nanotoxicity on Human and Plant Pathogenic Microbes and Aquatic Organisms. Environmental Toxicity of Nanomaterials CRC Press.
11. Mishra V., Dubey A., Prajapati S.K*. Algal biomass pretreatment for improved biofuel production. Algal Biofuels: Recent advances and future prospects (2017) Springer.
12. Choudhary P., Bhattacharya A, Prajapati S.K, Kaushik P, Malik A. (2014). Phycoremediation coupled biomethanation of microalgal biomass. Handbook of Microalgae: Biotechnology Advances 483-499, Elsevier.

National and International Conference/Workshop

International: 18

1. Prajapati, S.K.*, Singh, A., Kumar, P., Anand, V., Malik A., Bioenergy potential of waste algae from eutrophic lake (Oral Presentation) in First Central European Power-to-Gas Conference Regional perspectives of power-to-methane and carbon capture technologies held at Headquarters of The Hungarian Academy of Science, Budapest, Hungary during 12-13 December, 2022.
2. Singh, A., Anand, V., Bai, A., Prajapati, S.K.*, Role of algal biomethanation in GHG mitigation from water bodies (Oral Presentation) in First Central European Power-to-Gas Conference Regional perspectives of power-to-methane and carbon capture technologies held at Headquarters of The Hungarian Academy of Science, Budapest, Hungary during 12-13 December, 2022.
3.  Anand, V., Singh, A., Prajapati, S.K.*, Climate changes and the greenhouse gases from water bodies (Poster Presentation) in First Central European Power-to-Gas Conference Regional perspectives of power-to-methane and carbon capture technologies held at Headquarters of The Hungarian Academy of Science, Budapest, Hungary during 12-13 December, 2022.
4. Rana M. S.*, Prajapati S. K., Comparative assessment of microalgae strain and municipal wastewater for microalgae cultivation for biofuels application, International Conference on Hydro and Renewable Energy: Net Zero CarbonEnergy System (ICHRE-2022), October 17-18, 2022, IIT Roorkee, India.
5.   Rana M. S.*, Prajapati S. K., Comparative evaluation of microalgae cultivation systems for biofuels     application, 19th International Conference on Sustainable Energy Technologies (SET-2022), Oral presentation, August 16-18, 2022, Halic University, Istanbul, Turkey.
6. Rana M. S., Prajapati S. K*. Improved recovery of algal-lipid content for biodiesel production using water as a green absorbent (ICBSEE-2022), Poster presentation, June 20-24, 2022, NIT Rourkela, India.
7. Bhandari M., Prajapati S. K*. Growth of Chlorella pyrenoidosa in RO reject for metabolite production, International Conference on Bioprocess for Sustainable Environment and Energy (ICBSEE-2022), NIT Rourkela, India, during June 20-24, 2022.
8. Bhatt, A., Suthar, M., Arora, P., Prajapati S.K. *. Microalgae-mediated pathogen removal from wastewater; 20-24 June 2022. ICBSEE-2022-28/EV-12 Poster presentation at 3rd International Conference on Bioprocess for Sustainable Environment and Energy (ICBSEE-INDIA-2022); 20 - 24 June 2022, NIT Rourkela, Odisha.
9. Prajapati, SK. Use of filamentous fungi for bioharvesting and pretreatment algal biomass for biogas production in International E-Conference on Renewable Energy and Resources held during 26th – 27th April 2021 | United Research Forum, London, UK
10. Prajapati, SK. Improved biogas from algal biomass through fungi mediated harvesting and pretreatment Virtual International Conference on Technological Intervention in Renewable Energy for Sustainable Environment (RESE-2021) On 24th and 25th November 2021 Organised By Technology Incubation And Entrepreneurship Development (TIED) Cell and Centre Of Excellence In Sustainable Technologies For Rural Development [CESTRD] Department Of Biotechnology And Bioinformatics At Jaypee University of Information Technology Waknaghat, Solan - INDIA
11. Bhatt, A., Prajapati, S.K., Arora, P.*, Life cycle assessment of an SBR-based sewage treatment plant and development of algae-based improvement scenarios, 29th European Biomass Conference & Exhibition (EUBCE), 2021
12. Rana, M.S*, Prajapati, S.K. Role of iron oxide nanoparticle for improved biogas productivity from microalgae, International conference on biotechnology for sustainable agriculture, environment and health (BSAEH-2021), 2021.
13. A. Bhatt, P. Arora, S. K. Prajapati*. Recent advancements in microalgae-mediated pathogen removal for wastewater disinfection: current status and challenges. CTSE-1080 Oral presentation at Second International Virtual Conference on Recent Trends In “Clean Technologies for Sustainable Environment” (CTSE- 2021); 6-7 May 2021 (Online).
14. P. Choudhary, S. K. Prajapati, P. Kumar, A. Malik, K.K. Pant. Livestock wastewater treatment by outdoor microalgae cultivation. 167. Oral Presentation at 4th International Science Congress; 8th -9th December 2014 at Udaipur, India.
15. P. Kumar, P. Choudhary, S. K. Prajapati, A. Malik, V.K Vijay. Comparative evaluation of microalgae growth in liquid digestate obtained from algae and cattle dung digestion. 190. Oral Presentation at 4th International Science Congress held during 8th -9th December 2014 at Udaipur, India.
16. Malik A., Prajapati S. K., Choudhary P., Kumar P., Vijay V. K. 2014. ALgas: A sustainable approach for wastewater treatment coupled Bioenergy generation. “Indo-German Join Scientific Workshop on Water and Wastewater Management for Sustainable Development” held at IIT Delhi, India during January 30-31, 2014
17. Prajapati S. K, Kaushik P., Choudhary P., Malik A., Vijay V. K. 2012. Role of algae in wastewater treatment and fermentative biogas production. (Oral presentation) in 2^nd International Science Congress held during 8-9 December, 2012 at Vrindavan (Mathura), UP, India
18. Kumar G. S., Kumar S. 2010. Agent based modeling of algal production of biofuel. Poster presented in “International Conference on Emerging Technologies in Renewable Energy” held during 18-21 August, 2010 at College of Engineering, Anna University Chennai, India

(b) National: 08

1. P. Choudhary, S. K. Prajapati, P. Kumar, A. Malik, K.K. Pant. Utilization of livestock wastewater for Chroococcus sp.1 cultivation in an indoor vs outdoor open photobioreactor. Poster presented in Open House I² Tech 2015 held on 18 April, 2015 at IIT Delhi.
2.  P. Kumar, P. Choudhary, S. K. Prajapati, A. Malik, V.K Vijay. Evaluation of growth of microalgae on liquid digestate. Poster presented in Open House I² Tech 2015 held on 18 April, 2015 at IIT Delhi
3. Choudhary P., Prajapati S. K., Kumar P., Chawla P., Malik A., Vijay V.K. 2013. Biomass and biogas production for microalgae cultivated on rural sector wastewater.  Poster presented in Open House I² Tech 2013 held on 20^th April, 2013 at IIT Delhi.
4. Choudhary P., Prajapati S. K., Kumar P., Chawla P., Malik A. 2013. Biogas slurry as nutrient supplement for algae cultivation. Poster presented in Open House I² Tech 2013 held on 20^th April, 2013 at IIT Delhi.
5. Prajapati S. K., Choudhary P., Malik A., Vijay V. K. 2012. Estimation of biogas production potential of Spirulina sp. NCIM5143 cultivated in wastewater. Poster presented in National Convention on “Current and Emerging Trends in Indian Biogas and Bio-fertilizer Development” held on 16th September, 2012 at IIT Delhi, New Delhi India
6. Prajapati S. K., Malik A., Vijay V.K. 2012. Biogas from algal biomass: a carbon negative energy option. Poster presented in Open House I² Tech 2012 held on 21^st April, 2012 at IIT Delhi.
7. Kaushik P., Maheshwari G., Prajapati S. K., Malik A., Sharma S. Phycoremediation of wastewater in rural sector. Poster presented in Open House I² Tech 2012 held on 21^st April, 2012 at Indian Institute of Technology (IIT) Delhi
8. Gattani M. K., Prajapati S. K., Kumar G. S., Singhal S. 2010. Sustainable development in Uttarakhand through biogas technology: A field survey study. (Oral Presentation) in “National Seminar on Sustainable Development of Uttarakhand ” at UPES, Dehradun in 2010