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Subject: Microbiology × Author: Dilbag × End date: 2019 × Start date: 2019 ×
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    ThesisItemOpen Access
    Green synthesis and characterization of plant derived nanoparticles for enhancement of biogas production
    (CCSHAU, 2019) Dilbag; Malik, Kamla
    Energy crisis and environmental pollution are serious problems of sustainable development of the world. The problem is far more acute in the perspective of developing economies in countries like India where there is significant pressure on the available natural sources of energy. One of effective approaches to solve these energy problems is developing biomass energy such as biogas and biofuel. Biogas production is a well-established conversion technology to obtain energy from biomass that is alternative to fossil fuel. Nanotechnology can pave the way for betterment of biogas production through the use of nanocatalysts which ensure more efficient bioconversion strategies, better breakdown of substrates and more optimized output delivery. Generally, nanoparticles are prepared by a variety of chemical and physical methods which are quite expensive and potentially hazardous to the environment which involve use of toxic and perilous chemicals that are responsible for various biological risks. This may be the reason which leads to the biosynthesis of nanoparticles via green route that does not employ toxic chemicals and hence proving to become a growing interest to develop environment friendly processes. Therefore, in the present investigation was carried out green synthesized plant derived iron nanoparticles used for enhancement of biogas production from cattle dung. The nanoparticles were synthesized from neem (Azadirachta indica) and curry (Murraya koenigii) leaves with various conc. (30-70 ml) supplemented with cattle dung for biogas production. Characterization of the synthesized iron nanoparticles was done by UV-visible spectrophotometer, PSA, zeta potential analyzer (ZPA) and transmission electron microscopy (TEM). The highest absorption peak was observed at 432 nm.TEM image reveals that the FeNPs were in smaller size and spherical in shape with a diameter of 72.5 nm (NE) and 25 nm (CE), respectively. The maximum degradation (43.1%) of total solids was observed in T-5. Similar trend was observed in VS degradation and maximum degradation (15.7%) was observed in T-5. Biogas production from FeNPs (NE & CE) T-5 after 8 weeks of digestion was 104.3 litres and in T-9, it is found to be 98.6 litres as compared to control in which biogas production was found to be 85.2 litres. There was 22.4% increase in biogas production as compared to control after 8 weeks of batch anaerobic digestion. Cumulative biogas production with the addition of FeNPs attained the highest biogas yield (2537 l) in J2 as compared to J1 (2201 l) and methane contents were 77.8% as compared to control 72.3% after 8 week of digestion.