Comparative Evaluation of Cumulative Biogas Yield of Yellow Yam Brute Co–digested With Cow Paunch Manure in Batch Mode

Abstract

Abstract. Anaerobic digesters were used in a study to compare cumulative biogas yield from yellow yam brute, cow paunch and yellow yam brute co-digested with cow paunch manure. It was found out that the mixture slurry of yellow yam brute mixed with cow paunch (YYB+CP) had the highest cumulative biogas yield of 668.65 mL/TMS than the cumulative biogas yield of 587.86mL/TMS and 307.96 mL/TMS obtained from the single base line substrates of cow paunch and yellow yam brute, respectively within the 35 days hydraulic retention time (HRT). It was also observed that YYB+CP and cow paunch (CP) produced almost equal quantity of cumulative biogas yield of 398.76 mL/TMS within the first 15 days of observation compared with cumulative biogas yield 178.45 mL/TMS produced by yellow yam brute (YYB) within the same HRT. It was also observed that gas production reduced seriously in mono-digested substrates YYB and Cp compared with the co-digestate because of lack of synergistic nutrients. It is generally observed that co-digestion of more than one substrate increase cumulative biogas yield. The trend of cumulative biogas yield at the end of 35 days hydraulic retention time was YYB+CP > CP > YYB. This study is aimed to evaluate the performance of biogas production from yellow yam brute mixed with cow paunch manure, and to compare its cumulative biogas yield with cow paunch and yellow yam brute digested as mono-digestate in batch mode.

Comparative Study of Biogas Production from Jackfruit Waste, Banana Peels, and Pineapple Peels Co-Digested with Cow Dung

“…Jackfruit recorded the lowest production of biogas (495 mL) while banana recorded the second lowest (555 mL)., however, these results are relatively higher compared to the current study. Umeghalu et al [54] observed an increase in gas yield from 343.56 to 610.2 mL when co-digested with cow paunch and from 314.6 to 550.66 mL when co-digested with poultry droppings within the same 30 days observation period. Generally, the hydraulic retention time for all the treatments was 30 days.…”

Potential of Jackfruit Waste for Biogas, Briquettes and as a Carbondioxide Sink-A Review

“…According to Umeghalu, Okwonko, Ngini and Okoye (2015) and Pavithran et al (2015), jackfruit waste was codigested jackfruit with chicken droppings and cow dung to enhance biogas production. However, both studies disagreed on the pretreatment method used.…”

“…The study by Pavithran et al (2015) pretreated jackfruit waste by reducing the substrate particle sizes and addition of tungsten as a catalyst and sodium hydrogen carbonate to control the pH. The study by Umeghalu et al (2015) also pretreated jackfruit waste by reducing the substrate particle sizes but after soaked it for 20 days before anaerobic digestion. Other researchers like (Amin et al, 2017) have proved that sodium hydroxide improves the digestibility of substrates and increase methane yield.…”

“…The studies conducted by Pavithran et al (2015), Chakravarty (2016), Umeghalu et al (2015), Victor, Shajin, Roshni, and Asha (2014) and Vijayaraghavan, Ahmad, and Ibrahim (2006) all concluded that jackfruit waste can anaerobically be digested to produce biogas. However, none of these studies further conducted experiments to find out if the jackfruit-based digestate could be used as potential organic fertilizer for growth of crops.…”

“…Studies conducted by Chakravarty (2016), Umeghalu et al (2015), Rabii et al (2019), Elniski, Chatterjee, Mondal andDoelle (2019) and (Nansubuga et al (2015) concluded that co-digestion of substrates enhances biogas production compared to mono-digestion. Co-digestion is the combination of different substrates for improved biogas production (Attri, Sohpal, & Dewan, 2016).…”