Dry anaerobic co-digestion of food waste and cattle manure: Impact of total solids, substrate ratio and thermal pre treatment on methane yield and quality of biomanure. (April 2018)

• Record Type: Journal Article
• Authors: Arelli, Vijayalakshmi; Begum, Sameena; Anupoju, Gangagni Rao; Kuruti, Kranti; S., Shailaja
• Is Part Of: Bioresource technology. Volume 253(2018)
• Page Start: 273
• Page End: 280
• Publication Date: 2018-04
• Subjects: Dry anaerobic digestion -- Co digestion -- Food waste -- Biogas -- Biomanure; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.01.050
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Dry anaerobic codigestion of FW and CM for quality biogas and biomanure generation. Thermal pretreatment of substrate resulted in reduced HRT with high methane content. Pretreated substrate resulted in increase of methane from 62 to 81% at 30% TS. Methane yield at 30% TS from pretreated substrate was 0.43 m 3 CH4 /(kg VS reduced). Highest VS reduction of 89% was obtained at 30% TS from pretreated substrate. Abstract: The objective of the present study is to assess the impact of TS concentration, substrate mixing ratio (co digestion) and thermal pretreatment on biogas production, methane yield, VS reduction (%) and quality of biomanure through dry anaerobic digestion (DAD) of food waste (FW) and cattle manure (CM). Results divulged that the optimum methane yield and biomanure of 0.18 and 0.21 m 3 CH4 /(kg VS reduced) and 3.15 and 2.8 kg/kg waste was obtained from FW at TS of 25% and 30% at an HRT of 41 and 31 days respectively whereas it was 0.32 and 0.43 m 3 CH4 /(kg VS reduced) and 2.2 and 1.15 kg/kg waste from pretreated FW at an HRT of 16 and 20 days correspondingly. Improvement of methane from 62 to 81% was obtained due to thermal pretreatment. The highest nutrient recovery in terms of N, P, K was found to be 5.14, 2.6 and 3.2 respectively.