Abstract
Two types of biodegradable polymers, polycaprolactone (PCL) and poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV), were used as a denitrification slow-release carbon source and a microbial carrier. By comprehensively comparing their performances in denitrification, carbon release, surface morphology, and material composition as well as their microbial community characteristics, the PHBV was determined as the better performer. It had a shorter denitrification start time, a higher denitrification rate, a lower residual organic matter concentration, and a more stable and sustained denitrification performance than PCL. This is because its surface was rough and contained large amounts of hydrophilic groups such as C-O and C=O, which is easily attached and degraded by microorganisms. As a result, the microorganisms on its surface were diverse. The dominant ones were identified with heterotrophic denitrification potentials, such as Thiothrix, Pseudomonas, Zoogloea, Flavobacterium, and Dechloromonas. Therefore, PHBV is suitable as a carbon source medium for tertiary nitrogen removal.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.