การย่อยสลายสารโพรไพออเนตในถังปฏิกรณ์ที่บำบัดน้ำเสียตาลภายใต้สภาวะไร้อากาศ

Anaerobic Propionate Biodegradation in Sucrose-Fed Reactor

Name: เกียรติสุดา กาญจนภรางกูร

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Name: Kiatsuda Kanjanaparangula

keyword: Anaerobic Treatment

; Batch-Fed, Completely-Mixed Reactorc

Abstract: The objective of this research was to study the role of yeast extract supplementation, addition of specific bacteria groups (acetate-enriched methanogenic bacteria and formate-enriched methanogenic bacteria) and the role of reactor configuration on anaerobic propionate degradation in sucrose-fed reactors. Four different carbon sources (sugar, acetate, formate and propionate) were separately fed into four. Batch-Fed, Completely-Mixed Reactorc (BFCMR) with an initial influent COD of 3,000 mg/l. The reactor performance of BFCMR and upflow reactor were compared to evaluate the role of reactor configuration. Sucrose-fed reactor with an initial OLR of 0.2 kgCOD/m3-day had the COD removal of 91 percent. When an OLR was increased to 0.53 kgCOD/m3-day, the COD removal decreased to 45 percent because of propionate accumulation. Supplementation of yeast extract (100 mg/l in feed) did not enhance propionate degradation. After changing reactor configuration from BFCMR to upflow reactor with the same OLR of 0.53 kgCOD/m3-day, the results showed that addition of acetate enriched culture (25 percent increased) with formate enriched culture (50 percent increased) did not sharply enhance propionate degradation. At steady state, the upflow reactor had higher percentage of COD removal (65 percent vs 45 percent) comparing to BFCMR because the upflow reactor could retain bacteria more (about 5 times of VSS). The effluent of upflow reactor had 1,561 mg/l COD, 656 mg/l propionate and 158 mg/l acetate. The effluent of BFCMR had 3,975 mg/l COD,?1,572 mg/l propionate and 852 mg/l acetate. The MLVSS of upflow reactor and BFCMR were 7,280 and 1,320 mg/l, respectively. For propionate-fed reactor, the COD removal of upflow reactor was better than that of BFCMR because the upflow reactor could retain larger amount of bacteria (about 5 times more VSS). The BFCMR reactor, at an OLR of 0.2 kgCOD/m3-day, had the COD removal of 20 percent and the characteristics of effluent were 2,120 mg/l propionate and 780 mg/l acetate. The upflow reactor, at an OLR of 0.2 kgCOD/m3-day had the COD removal of 83 percent and the characteristics of the effluent were 520 mg/l propionate and 82 mg/l acetate. The MLVSS of both BFCMR and the upflow reactor were 787 and 4,300 mg/l, respectively.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร

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

Name: สาโรช บุญบกิจสมบัติ

Role: อาจารย์ที่ปรึกษา

Created: 2546

Issued: 2005-08-04

Modified: 2554-01-02

วิทยานิพนธ์/Thesis

ISBN: 9741832532

CallNumber: ENV215

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: วิศวกรรมสิ่งแวดล้อม

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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