Semi-continuous anaerobic co-digestion of chicken litter with agricultural and food wastes: A case study on the effect of carbon/nitrogen ratio, substrates mixing ratio and organic loading

Zahan, Z, Georgiou, S, Muster, T and Othman, M 2018, 'Semi-continuous anaerobic co-digestion of chicken litter with agricultural and food wastes: A case study on the effect of carbon/nitrogen ratio, substrates mixing ratio and organic loading', Bioresource Technology, vol. 270, pp. 245-254.


Document type: Journal Article
Collection: Journal Articles

Title Semi-continuous anaerobic co-digestion of chicken litter with agricultural and food wastes: A case study on the effect of carbon/nitrogen ratio, substrates mixing ratio and organic loading
Author(s) Zahan, Z
Georgiou, S
Muster, T
Othman, M
Year 2018
Journal name Bioresource Technology
Volume number 270
Start page 245
End page 254
Total pages 10
Publisher Elsevier
Abstract In this study, four agro-industrial substrates, chicken litter (CL), food waste (FW), wheat straw (WS) and hay grass (HG) were assessed as feedstock for anaerobic digestion (AD) under semi-continuous conditions at organic loading rates (OLRs) of 2.0-3.0 g TS/L.d and hydraulic retention time (HRT) of 20 days. Six different substrate mixtures were prepared such that the C/N ratio of each was 20 or more. Using principal component analysis 68.1% of data variability was explained. Biogas production from CL, as a single substrate, was 181.3 ± 9.8 mLN biogas/g VSadded at OLR of 2.0 gTS/L.d. The optimum substrates mixture was CL:FW:WS 60:20:20, where 73.0%, 167.2% and 116.9% increase in total biogas production at OLR of 2.0, 2.5, 3.0 gTS/L.d, respectively, compared to that from CL, was obtained. Digestate sequential fractionation revealed carbohydrate degradation is an important factor that can explain the variation in performance and production of biogas for feedstocks of balanced C/N ratio.
Subject Environmental Engineering Design
Environmental Technologies
Environmental Engineering Modelling
Keyword(s) Continuous anaerobic co-digestionC/N ratioOrganic loading rateChicken litterFood wastesHay grassWheat strawLignocellulose fractionationAnaerobic digestion reactor performancePCA analysis
DOI - identifier 10.1016/j.biortech.2018.09.010
Copyright notice © 2018 Published by Elsevier Ltd.
ISSN 0960-8524
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