Evaluation of the Biogas Productivity Potential of Fish Waste: A Lab Scale Batch Study

Abstract

Purpose:The biogas productivity potential of fish waste (FW) was evaluated. Methods: Batch trials were carried out in 1.3 L glass digesters kept in a temperature controlled chambers at 36.5˚C. The first order kinetic model and the modified Gompertz model were evaluated for biogas production. The Chen and Hashimoto model was used to determine the critical hydraulic retention time (HRT Critical) for FW under mesophilic conditions. The feasibility of co-digestion of FW with animal manure was studied. Results: The biogas and methane potential of FW was found to be 757 and 554 mL/g VS, respectively. The methane content in the biogas produced from FW was found to be 73% and VS removal was found to be 77%. There was smaller difference between measured and predicted biogas production when using the modified Gompertz model (16.5%) than using first order kinetic model (31%). The time period for 80%-90% of biogas production (T80-90) from FW was calculated to be 50.3-53.5 days. Similarly, the HRT Critical for FW was calculated to be 13 days under mesophilic conditions. The methane production from swine manure (SM) and cow manure (CM) digesters could be enhanced by 13%-115% and 17%-152% by mixing 10%-90% of FW with SM and CM, respectively. Conclusions: The FW was found to be highly potential substrate for anaerobic digestion for biogas production. The modified Gompertz model could be more appropriate in describing anaerobic digestion process of FW. It could be promising for co-digestion of FW with animal manure.

Influence of acidogenic fermented fish by-products with rice bran for sludge reduction and biogas recovery in anaerobic co-digestion

“…In addition, rice bran has the advantage of reduced cost relative to other external carbon sources and recycled resources because it is waste of milling rice [26]. According to previous studies, about 70% of the methane produced in anaerobic digestion comes from acetic acid and can have a significant effect on biogas production and sludge reduction in the anaerobic co-digestion process [3,12,15,18,21]. The experiments showed that the pH was 3.2 at 5 d of acidogenic fermentation when using rice bran ( Fig.…”

“…In particular, SF2 and SF3 using TFFB and RFFB, respectively, had a lower H 2 S content than SF1 without an FFB. Hydrogen sulfide is toxic and combines with the water vapor contained in biogas to form sulfuric acid, which should be removed when biogas is used as fuel because it is corrosive to metal [20,21,29]. Thus, low hydrogen sulfide content can reduce the post-treatment cost.…”

“…However, acidogenic fermentation of FBs produces acetic acid, butyric acid, etc., so the problems caused when FBs are directly injected can be reduced in advance [17]. In addition, in acidogenic fermentation of fishery by-product broth (FFB), there are many kinds of anaerobic bacteria in the acid production stage [17,21]. Many of these various types of bacteria are less sensitive to various environmental changes than a single group of bacteria [19].…”

Residues of the transformation of halieutics products: An alternative substrate for energy valorization of wastes by methanisation for a local sustainable development (preliminary results)

“…To maximize methane production, it is better to use products rich in lipids, carbohydrate and proteins. This is why we're interested in residues of the transformation of fish products for biogas production; because they are substrates rich in lipids and proteins (Kaffe and Kim, 2012), which can speed up the process of forming methane during anaerobic digestion.…”

Emissions of Odor, Ammonia, Hydrogen Sulfide, and Volatile Organic Compounds from Shallow-Pit Pig Nursery Rooms

“…pH value was determined using a pH meter (YK-2001 PH, Taiwan) (Kafle and Kim, 2012a;Kafle and Kim, 2012b).The analysis of crude fiber (CF), CP, and Ether extract (EE) were done according to the methods described in AOAC (1990). The total volatile fatty acids (TVFA), total alkalinity (TA) were determined using the Nordmann-titration method (Kafle and Kim, 2011;Kafle et al, 2012;Kim and Kafle, 2010).…”