Volatile Fatty Acids (VFA) Production and Recovery from Chicken Manure Using a High-Solid Anaerobic Membrane Bioreactor (AnMBR)

Abstract

Acidogenic fermentation of chicken manure (CM) for production and recovery of volatile fatty acids (VFA) is an interesting biological waste-to-value approach compared to benchmark organic waste management strategies. Considering the wide range of high value applications of VFA, a semi-continuous immersed anaerobic membrane bioreactor (AnMBR) was applied to boost VFA productivity and yield, while reducing downstream processing stages assisting the recovery of VFA. In this regard, the effect of parameters such as pH and organic loading rates (OLR) on the overall bioconversion and filtration performance was investigated. Thermal-shocked CM was applied both as inoculum and substrate. A very high VFA yield (0.90 g-VFA/g-VS) was obtained in the treatment with no pH control (~8.2) at an OLR of 2 g-VS/(L·d), presenting 24% higher yield compared to that of the controlled pH. Batch assays further demonstrated the enhanced hydrolysis and acidogenesis activities at weak alkaline conditions. A long-term (78 days) fermentation and filtration was successfully performed, where stable membrane filtration performance was experienced for about 50 days under high-solid (suspended solid of 37–45 g/L) and high flux (20 L/(m2·h)) conditions. Results suggest that AnMBR of CM is a feasible and promising process for VFA production and recovery.

Influence of Molasses Residue on Treatment of Cow Manure in an Anaerobic Filter with Perforated Weed Membrane and a Conventional Reactor: Variations of Organic Loading and a Machine Learning Application

“…This investigation revealed that the AF displays very poor VS removal when co-digested with MR, reaching values below 20%. The low VS removal could be attributed to the acidification and hydrolysis that produced VFA and the ethanol that was kept in the effluents [ 65 ]. The trend of VS removal is proportional to the methane production for both the CSTR and the AF.…”

The potential of Nordic microalgae in nutrient removal from anaerobic digestion effluents

“…Anaerobic digestion effluent obtained from PPS (Abdla 2022) was collected from Östrand pulp mill (Östrand, Sweden), CKM (Yin et al 2022a) was obtained from the egg‐laying farm Sjömarkens Hönsgård AB (Borås, Sweden). VFAs were produced of both waste streams in an immersed membrane bioreactor; the separated liquid part (Abdla 2022, Yin et al 2022a) was first filtered using filter paper (Ahlstrom‐Munksjo Munktell, Thermofisher scientific) with the pore size of 10 μm, then autoclaved. The pH was adjusted to 7.1 using 1% H 2 SO 4 and 2 M NaOH.…”

“…Roughly 40 kg manure are produced per laying hen per year and 3 kg of manure per broiler (Yin et al 2022a). A common approach to treat PPS (Lin et al 2017) and/or CKM (Yin et al 2022a, Yin et al 2022b) is anaerobic digestion for biogas production.…”

“…Gateway to Poultry Production and Products 2020), resulting in the production of around 267 million metric tons of chicken manure (CKM). Roughly 40 kg manure are produced per laying hen per year and 3 kg of manure per broiler (Yin et al 2022a). A common approach to treat PPS (Lin et al 2017) and/or CKM (Yin et al 2022a, Yin et al 2022b) is anaerobic digestion for biogas production.…”

Microbial Growth Rate Kinetics in Biogas Production by Anaerobic Digestion of Chicken Manure

“…Successful anaerobic digestion of CM would not only be a means of manufacturing biogas in high quantity, but also a reliable source for the production of the intermediate product of anaerobic digestion called volatile fatty acids (Yin et al, 2022). Zeolite can be added to adsorb ammonia from CM leachate during anaerobic digestion to improve its biochemical methane potential (Spyridonidis et al, 2022).…”