School Of Environment And Earth Sciences
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Item Biohythane production from food processing wastes � Challenges and perspectives(Elsevier, 2020) Meena, R.A.A; Rajesh, Banu J; Yukesh, Kannah R; Yogalakshmi, K.N; Kumar, G.The food industry generates enormous quantity of food waste (FW) either directly or indirectly including the processing sector, which turned into biofuels for waste remediation. Six types of food processing wastes (FPW) such as oil, fruit and vegetable, dairy, brewery, livestock and finally agriculture based materials that get treated via dark fermentation/anaerobic digestion has been discussed. Production of both hydrogen and methane is daunting for oil, fruit and vegetable processing wastes because of the presence of polyphenols and essential oils. Moreover, acidic pH and high protein are the reasons for increased concentration of ammonia and accumulation of volatile fatty acids in FPW, especially in dairy, brewery, and livestock waste streams. Moreover, the review brought to forefront the enhancing methods, (pretreatment and co-digestion) operational, and environmental parameters that can influence the production of biohythane. Finally, the nature of feedstock's role in achieving successful circular bio economy is also highlighted. � 2019 Elsevier LtdItem Biohythane production from food processing wastes – Challenges and perspectives(Elsevier Ltd, 2020) Meena R.A.A.; Rajesh Banu J.; Yukesh Kannah R.; Yogalakshmi K.N.; Kumar G.The food industry generates enormous quantity of food waste (FW) either directly or indirectly including the processing sector, which turned into biofuels for waste remediation. Six types of food processing wastes (FPW) such as oil, fruit and vegetable, dairy, brewery, livestock and finally agriculture based materials that get treated via dark fermentation/anaerobic digestion has been discussed. Production of both hydrogen and methane is daunting for oil, fruit and vegetable processing wastes because of the presence of polyphenols and essential oils. Moreover, acidic pH and high protein are the reasons for increased concentration of ammonia and accumulation of volatile fatty acids in FPW, especially in dairy, brewery, and livestock waste streams. Moreover, the review brought to forefront the enhancing methods, (pretreatment and co-digestion) operational, and environmental parameters that can influence the production of biohythane. Finally, the nature of feedstock's role in achieving successful circular bio economy is also highlighted.Item Effect of chemo-mechanical disintegration on sludge anaerobic digestion for enhanced biogas production(Springer Verlag, 2016) Kavitha, S.; Saji Pray, S.; Yogalakshmi, K.N.; Adish Kumar, S.; Yeom, I.-T.; Rajesh banu, J.The effect of combined surfactant-dispersion pretreatment on dairy waste activated sludge (WAS) reduction in anaerobic digesters was investigated. The experiments were performed with surfactant, Sodium dodecyl sulfate (SDS) in the range of 0.01 to 0.1?g/g suspended solids (SS) and disperser with rpm of 5000?25,000. The COD (chemical oxygen demand) solubilization, suspended solids reduction, and biogas generation increased for an energy input of 7377?kJ/kg total solids (TS) (12,000?rpm, 0.04?g/g SS, and 30?min) and were found to be 38, 32, and 75?%, higher than that of control. The pretreated sludge improved the performance of semicontinuous anaerobic digesters of 4?L working volume operated at four different SRTs (sludge retention time). SRT of 15?days was found to be appropriate showing 49 and 51?% reduction in SS and volatile solids (VS), respectively. The methane yield of the pretreated sample was observed to be 50?mL/g VS removed which was observed to be comparatively higher than the control (12?mL/g VS removed) at optimal SRT of 15?days. To the best of the authors? knowledge, this study is the first to be reported and not yet been documented in literature. ? 2015, Springer-Verlag Berlin Heidelberg.