Association between Biogas Quality and Digester Temperature for Selected Animal Dung-Aided Water Hyacinth Digestion Mixes

Abstract

In this study, the association between biogas qulaity and digester temperature for selected animal dung-aided water hyacinth digestion mixes was evaluated. Substrates utilized in this study are water hyacinth (WH), poultry manure (PM) and cow dung (CD) and pig dung (PD). Thirty-one (31) co-digestion mix ratios were used in this study. The temperature ranged from 28.6 to 32.2 0C for the PD-aided WH digestion, 28.2 to 31.4 0C for the CD-aided WH digestion and 28.2 to 31.8 0C for the PM-aided WH digestion. This shows that the digestion process occurred within the mesophilic temperature range. The data obtained were analyzed using non-linear parameter estimation. The results revealed that the PM-aided WH mix produced more gas but with less methane content compared to the CDaided and PD-aided WH digestion mix. The results further revealed that the best quality of gas produced by the PD-aided WH digestion. The association between the temperature and gas quality was positive suggesting that an increase in temperature within the digestion leads to an increase in the quality of gas produced. 
 Keywords: Biogas quality, temperature, co-digestion, animal dung, water hyacinth

Biogas Quantity and Quality from Digestion and Co-Digestion of Food Waste and Cow Dung

“…The cow dung and food waste were digested individually and collectively through the process of co-digestion. The content of the digesters is shown in According to Fekadu (2014) and Ojo and Babatola (2020), the quantity of water added was determined using equation 1…”

“…Biogas production by AD is popular for treating biodegradable wastes because valuable fuel can be produced while destroying the disease -causing pathogens and reducing the volume of disposed waste products (Babatola, 2008). Co-digestion is AD performed on a mixture of at least two different substrates (Alvarez and Lidén, 2008;Cuetos et al, 2011;Ojo, 2017;Ojo et al, 2018;Ojo et al, 2019;Ojo and Babatola, 2020). Co-digestion is a technology that is increasingly being applied for simultaneous treatment of different solid and liquid organic wastes (Bouallagui et al, 2009).…”