Effects of solids residence time on phosphrorus removal with oxigen or nitrate

ผลของอายุตะกอนต่อการบำบัดฟอสฟอรัสโดยใช้ออกซิเจนหรือไนเตรด

Name: Chalermraj Wantawin

Organization : King Mongkut's Institute of Technology Thonburi. Faculty of Engineering. Department of Chemical Engineering

Name: Vasana Peetamnongsin

Organization : King Mongkut's Institute of Technology Thonburi. School of Energy, Environment and Materials. Department of Environmental Technology

Name: เฉลิมราช วันทวิน

Name: วาสนา พีธรรมนงค์สิน

keyword: Sewage purification

; Anaerobic anoxic

; Sequencing batch reactor process

Abstract: Two sets of experiments were conducted by sequencing batch reactors (SBRs) to study the effects of solids residence time (SRT) and type of electron acceptor on the removal of phosphorus Nitrate was applied in one set while oxygen in the other and each set was conducted in parallel by varying SRT operations that were 5 days, 10 days and 15 days and maintaining cycle time at 8 hours. When tested with synthetic wastewater having acetate as sole carbon source with COD 400 mg/l and phosphorus of 20 mg/l, the effluent COD concentrations in all runs were in the same level and slightly higher oxidation were obtained at anaerobic-aerobic SBRs (98%-97.9%) than those at anaerobic-anoxic SBRs (92.4%-98%). However varying SRTs results in significant difference on phosphorus removal. At the SRT of 5 days, 10 days and 15 days, the phosphorus removal efficiencies were 47.5%, 84%, and 75% respectively, in the anaerobic aerobic process and 28.5%, 76.6% and 67.5%. respectively, in the anaerobic anoxic one. Cycle measurement showed that low SRT operating gave high remaining COD in external electron acceptor phase and therefore can reduce the capability on phosphorus uptake

King Mongkut's Institute of Technology Thonburi

Address: Bangkok

Email: info.lib@mail.kmutt.ac.th

Created: 1997

Issued: 2550-02-05

Modified: 2017-03-22

บทความ/Article

BibliograpyCitation : KMITT Research and Development Journal vol. 20, no. 2 (Dec. 1997), p. 63-70

CallNumber: 12001959

eng

©copyrights King Mongkut's University of Technology Thonburi

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