Abstract
The filtration characteristics of untreated sewage sludge, thermal alkaline pretreated and anaerobic fermented sewage sludge were investigated in the process of fatty acids production. The filtration resistance, viscosity, particle size, extracellular polymeric substances (EPS) and soluble microbial products (SMP) were determined to identify the filtration characteristics of the sewage sludge. The results indicated that thermal alkaline pretreatment significantly increased the filtration resistance and viscosity of the sewage sludge, while anaerobic fermentation decreased the filtration resistance. The particle size of the sewage sludge decreased after pretreatment and fermentation. Moreover, the EPS concentration in the sludge sharply decreased after thermal alkaline pretreatment and then increased after the following fermentation. The mechanism of the increase of sludge filtration resistance after pretreatment could be attributed to the release of EPS from the microbial cells of the sludge. The degradation and conversion of SMP into volatile fatty acids could explain the decrease in the filtration resistance after fermentation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
