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Thuy, Tran Thanh. Domestic wastewater treatment using high rate anaerobic reactors. Master's Degree(Environmental Technology). King Mongkut's University Technology Thonburi. Library. : King Mongkut's University of Technology Thonburi, 2003.
Domestic wastewater treatment using high rate anaerobic reactors
Name: Thuy, Tran Thanh
Organization :
King Mongkut's University of Technology Thonburi. The Joint Graduate School of Energy and Environment. Environmental Technology
keyword:
Anaerobic treatment
Abstract:
Anaerobic hybrid (AH) and anaerobic mixing (MX) reactors of 5.5 1 and an expanded granular sludge bed (EGSB) reactor of 6.5 1, respectively, were used to study the treatment of domestic wastewater. Each reactor was seeded with 10 gVSS11 of granular sludge.Domestic wastewater with 130 - 155 mgll of BODS (220 - 400 mgll of CODt) was continuously upflow fed to the reactors. Influent TKN and phosphorus were 20-50 and 4-7 mgll, respectively. Buffer capacity of the three reactors was controlled by adding bicarbonate in the amounts up to 0.2 gll. pH and TVAlAlkalinity inside the reactors were in the range of 6.5-7.5 and < 0.4, respectively. The AH reactor was fed with the increase of organic loading rate (OLR) from 0.16 to 3.5 gCOD1l.d. The removal CODd and methane composition at OLR 2-3.5 gCOD1l.d and HRT 4 h was 70-77% and 61%, respectively. The results indicated that minimum contact time for microorganisms (sludge and biofilm) and organic substances in the treatment efficiency of the AH reactor was 4 h. In the case of the MX reactor, it could load up to 1.5 gCOD1l.d at HRT of 5.7h, which gave CODd and CODt removal efficiencies of 54% and 46%, respectively. Methane composition in the MX reactor was 24%. In the EGSB reactor, OLR can increase from 0.16 to 5 gCOD1l.d by decreasing HRT from 33 to 2.8 h. The minimum contact time for granular sludge and organic substances was 2.8 h. The removal of CODd and methane composition at 0 ~ f o f 3-5 gCOD1l.d and HRT of 2.8 h were 64-68% and 5 1%, respectively. Total energy required for AH, MX and EGSB reactors was almost 226, 487 and 205 kWkg COD removal, respectively. Dispersion numbers in AH, MX and EGSB reactors were 0.1 1, 0.07 and 0.12, respectively. In addition, the mixing pattern in these three reactors closed to a plug flow pattern. Among three reactors, the highest CODd removal efficiency found in the AH reactor was due to the retaining biomass competence and the high value of specific methanogenicactivity (SMA). Contrary to this, the breaking of granules due to the improper mixing speed caused low efficiency in the MX reactor. In addition, the lowest energy requirement in terms of kWkg CODt removal was found in EGSB reactor which indicates that theEGSB reactor also is a good alternative reactor compared to the AH reactor for domestic wastewater treatment.
King Mongkut's University Technology Thonburi. Library
Address:
กรุงเทพมหานคร (Bangkok)
Email:
info.lib@mail.kmutt.ac.th
Name: Pawinee Chaiprasert
Role:
Advisor
Created:
2003
Issued:
2007-07-12
Modified:
2007-07-26
วิทยานิพนธ์/Thesis
ISBN:
9744562811
CallNumber:
JGSEE46
eng
DegreeName: Master of Philosophy
Level: Master's Degree
Descipline: Environmental Technology
©copyrights King Mongkut's University of Technology Thonburi
RightsAccess:
ใช้เวลา
0.027164 วินาที
Thuy, Tran Thanh
| Title | Contributor | Type |
|---|---|---|
| Domestic wastewater treatment using high rate anaerobic reactors
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี Thuy, Tran Thanh | Pawinee Chaiprasert | วิทยานิพนธ์/Thesis |
Pawinee Chaiprasert