DOI: 10.12187/2025.04.013
The acid production performance of co-fermentation between food industry waste and low organic matter residual sludge
JIN Baodan
WANG Jiacheng
DU Jingyu
DENG Weiling
GU Jiayu
Wang Baogui
JIA Yusheng
Abstract：To simultaneously address the treatment and disposal issues of food industry production waste and low organic matter residual sludge,these two wastes were co-fermented.The performance of H0,H1,H2 and H3 co-fermentation systems under mass ratios of 0∶1.0,0.5∶1.0,1.0∶1.0 and 1.5∶1.0 was evaluated.Results indicated that food industry production waste introduction significantly reduced hydrolysis performance but enhanced acidification performance of the co-fermentation systems.In the H3 system,COD and volatile SCFAs concentrations reached their maximum,being 2.83-fold and 2.30-fold higher than those in H0,respectively.As food industry production waste dosage increased,NH4+—N concentration decreased markedly(31.9%of H0 in H3),while PO43-—P remained low(≤1.01 mg/L)due to Ca3(PO4)2 and CaNH4PO4 precipitates.Enzyme activities varied:protease,acid phosphatase,and butyrate kinase decreased;α-glucosidase and alkaline phosphatase increased;dehydrogenase was less affected;acetate kinase initially rose then declined.Appropriate food industry production waste introduction also enriched functional microorganisms,including Firmicutes(dominant acetic acid-producing phylum,63.1%in H2),Proteobacteria,Actinobacteriota,and Bacteroidota.Thus,food industry production waste addition enables efficient acid production in low organic matter residual sludge co-fermentation systems.
Keywords：food industry production wastelow organic matter residual sludgeco-fermentationbiological enzymesfunctional microorganisms
Publication Date：2025-08-15
Online Publishing Date：2025-08-19(First online date of this platform, not the publication date of the document)
Pages：12( 115-126 )