Influence of alkyl sulfates on waste activated sludge fermentation at ambient temperature.
Alkyl sulfates (AS), such as sodium dodecyl sulfate (SDS), are widely used in household and industrial products, and can be found in some wastewater and waste activated sludge (WAS). The effect of SDS on the fermentation of WAS at ambient temperature was investigated in this paper. Experimental results showed that the concentrations of protein and carbohydrate in aqueous phase increased with the amount of SDS. The concentrations of both NH(4)(+)-N and PO(4)(3-)-P in fermentation liquor also increased in the presence of SDS. In addition, it was observed that the fermentative short-chain fatty acids (SCFAs) concentration was affected by SDS. With the increase of SDS dosage, the maximum SCFAs concentration increased, and the fermentation time before reaching the maximum SCFAs concentration also increased. Further investigation showed that the produced SCFAs consisted of acetic, propionic, n-butyric, iso-butyric, n-valeric and iso-valeric acids, and acetic, iso-valeric and propionic acids were the three main products. The influence of SDS on methanogenesis was also investigated, and the inhibitory effect of SDS on methanogens activity was observed.
Jiang
Su
S
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Chen
Yinguang
Y
Zhou
Qi
Q
D001673:Biodegradation, Environmental / Q000187:drug effects*; D002241:Carbohydrates / Q000032:analysis; D005232:Fatty Acids, Volatile / Q000032:analysis; D005285:Fermentation; D007220:Industrial Waste; D010710:Phosphates / Q000032:analysis; D011506:Proteins / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012722:Sewage / Q000382:microbiology*; D012967:Sodium Dodecyl Sulfate / Q000494:pharmacology; D013431:Sulfates / Q000494:pharmacology*; D014865:Waste Disposal, Fluid / Q000379:methods*
D002241:Carbohydrates; D005232:Fatty Acids, Volatile; D007220:Industrial Waste; D010710:Phosphates; D011506:Proteins; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D013431:Sulfates; D012967:Sodium Dodecyl Sulfate