Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/54044
Title: Recovery of acerbic anaerobic digester for biogas production from pomegranate shells using organic loading approach
Authors: Jain, Kalpana
Suryawanshi, Pradeep
Chaudhari, Ambalal
Keywords: Anaerobic digestion;Methane yield;Organic loading rate (OLR);Propionate;Punica granatum;Volatile solids
Issue Date: Feb-2020
Publisher: NISCAIR-CSIR, India
Abstract: Anaerobic digestion of pomegranate shells was conducted in 25 L bioreactor operating at 35±0.5°C. The digester showed a reasonable amount of biogas (0.71 m3/kg VS fed) and methane (55.7%) with stable pH and acid: alkali profiles when operated at organic loading rate (OLR) from 1.0 to 3.0 kg VS/day/m−3. The reactor exhibited stable performance with methane yield of 0.44 m3/kg VS fed and reduction of 38.5% volatile solids (VS) As organic loading rate increased to 3.5 kg VS/day/m−3, accumulation of volatile fatty acid (VFA; 2797 ppm), mainly propionic acid (1617 ppm) was noticeable. The digester turned sour (pH 4.32) with lower biogas (2.5 Ld−1) and methane (30.80%) production, reflecting the case of overloading. Reversal of organic loading rate from 3.5 to 3.0 kg VS/day/m−3 gradually restored the upset anaerobic digester to normal profile in 4 weeks as judged from a gradual increase in biogas (6.5 Ld−1) and methane (58.4%).
Page(s): 86-94
URI: http://nopr.niscair.res.in/handle/123456789/54044
ISSN: 0975-0959 (Online); 0301-1208 (Print)
Appears in Collections:IJBB Vol.57(1) [February 2020]

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