Abstract
Proper strategies for reducing the sludge production are a key factor for a correct wastewater treatment plant (WWTP) management. This paper describes an experimental study on sludge thermal alkaline hydrolysis under mild conditions (temperatures from 40 to 70 °C and pH up to 11.5), aimed at sludge minimisation. Tested biological sludge derived from two different WWTPs that treat urban and mixed urban/industrial wastewater, respectively. The experimental results showed: 1) an increase of soluble COD in sludge supernatants; 2) very good biodegradability of the supernatants; 3) improved settleability and dewaterability of treated sludge. The best results were obtained under the following conditions, using lime milk: 70°C, pH 10.0-10.5, contact time 3h.
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.
