Enhancing anaerobic co-digestion of primary settled-nightsoil sludge and food waste for phosphorus extraction and biogas production: effect of operating parameters and determining phosphorus transformation
Issued Date
2023-02-01
Resource Type
ISSN
09441344
eISSN
16147499
Scopus ID
2-s2.0-85141179760
Pubmed ID
36318410
Journal Title
Environmental Science and Pollution Research
Volume
30
Issue
9
Start Page
23173
End Page
23183
Rights Holder(s)
SCOPUS
Bibliographic Citation
Environmental Science and Pollution Research Vol.30 No.9 (2023) , 23173-23183
Suggested Citation
Pimpeach W., Polprasert C., Panyapinyopol B., Polprasert S., Mahasandana S., Patthanaissaranukool W. Enhancing anaerobic co-digestion of primary settled-nightsoil sludge and food waste for phosphorus extraction and biogas production: effect of operating parameters and determining phosphorus transformation. Environmental Science and Pollution Research Vol.30 No.9 (2023) , 23173-23183. 23183. doi:10.1007/s11356-022-23853-5 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/82855
Title
Enhancing anaerobic co-digestion of primary settled-nightsoil sludge and food waste for phosphorus extraction and biogas production: effect of operating parameters and determining phosphorus transformation
Author's Affiliation
Other Contributor(s)
Abstract
The study aimed to comprehensively determine P extraction efficiency and co-digestion of food waste (FW) and primary settled-nightsoil sludge (PSNS) process performance influenced by different hydraulic retention times (4, 7, 10, and 15 days) and mixture ratios of FW:PSNS in substrates (100:0, 75:25, 50:50, 25:75, and 0:100). P-transformation was evaluated to identify P fractionation in both supernatant and sludge accumulated in reactors. The results showed that anaerobic co-digestion was inhibited by the accumulation of undigested feedstock due to higher %PSNS found in AD4 (25FW:75PSNS) and AD5 (100PSNS). A more stable process was found in AD2 (75FW:25PSNS) under hydraulic retention time (HRT) 15 days in which COD removal efficiency and P release were 97.2 and 80.2%, respectively. This recommended condition allowed a high organic loading rate (OLR) at 12 gVS/L/day resulting in the highest biogas yield of 0.93 L/L/day. Distribution of P data demonstrated that most of P in feedstock was deposited and accumulated in sediment up to 97.8%. Poor biodegradability resulting from using shortened HRT led to high increased P-solid content in effluent. In addition, available P in effluents and accumulated P-solids in sediment obtained from the AcoD process has the potential to serve as sources for P recovery.