Effects of co-substrate on biogas production from cattle manure: a review

Abstract

This literature review surveys the previous and current researches on the co-digestion of anaerobic processes and examines the synergies effect of co-digestion with cattle manure. Furthermore, this review also pays attention to different operational conditions like operating temperature, organic loading rate (OLR), hydraulic retention time (HRT), chemical oxygen demand (COD) and volatile solid (VS) removal efficiency and biogas or methane production. This review shows that anaerobic mono-digestion of cattle manure usually causing poor performance and stability. Anaerobic studies were generally performed under mesophilic conditions maintained between 35 and 37°C. Organic waste loading rate generally ranges from 1 to 6 g VS-COD L -1 day -1 stable condition in anaerobic digester. Generally, studies show that HRT for co-digestion of fruit-vegetables waste and industrial organic waste appears to exceed 20 days. However, the anaerobic co-digestion process is generally operated at HRT of between 10 and 20 days. VS and COD removal efficiency usually reaches up to 90 % due to codigestion with different type organic waste. Methane-biogas production is generally obtained between 0.1 and 0.65 L CH 4 -biogas g -1 VS.

Forage types and origin of manure in codigestion affect methane yield and microbial community structure

“…Manure is a suitable substrate for biogas production, as it is available in large amounts for many farms operating biogas plants. Manure is also feasible for the microbiological process because of its content of trace minerals and stabilization of pH in the biogas digester (Tufaner & Avşar, ). However, the concentration of organic matter in manure is low, and the water content is high, resulting in low organic loads in the digester and consequently low volumetric gas production.…”

Evaluation of biogas production from co-digestion of pig dung, water hyacinth and poultry droppings

“…The presence of iron element in both substrates used suggests these materials to be suitable for biogas synthesis since iron is needed in methanogenesis by almost all the metalloenzymes involved in the pathway of methanogenesis [11]. Majority of the methanogenic enzymes function optimally only at high concentration of K + ions [29]. The existence of potassium ions in pig dung, water hyacinth, and poultry droppings suggests that methanogenic bacteria required for methane generation will be capable of surviving various stresses of environment which they may be exposed to.…”

A Review of Commercial Biogas Systems and Lessons for Africa

“…Anaerobic digestion, producing biogas, is one of only a few biotechnological processes, which utilise such wastes effectively while generating energy [1,114]. It has been used widely in the waste stabilisation process because of the need to treat waste before disposal, and the need to reduce methane emission into the environment [115,116]. A government ban on disposal of MSW to landfills in Germany increased the demand of biogas plants for MSW management [117].…”