Anaerobic treatment of high strength phthalic waste by a hybrid UASB-biofilter reactor

Author

Mao-Yuan Tur

Abstract

"The anaerobic degradability of phthalic acid (PA), isophthalic acid (IA) and terephthalic acid (TA) was evaluated at 35°C using a modified serum bottle technique. It was found that sludge acclimation to these acids could be greatly enhanced by periodic dosings of glucose as a carbon supplement. When glucose was used, the sludge became acclimated to PA in 70 days, to IA in 115 days, and to TA in 155 days. Without glucose, the acclimation to PA took 120 days, but it never occurred to IA and TA throughout a duration of 300 days. Upon acclimation, the daily gas productions for degrading 4000 mg/L of PA, IA and TA, each in 20-ml test volume, were 2.3, 2.8 and 2.2 ml/day, respectively. About 90% of the removed aromatic acids were converted to methane.

The treatability study of a synthetic PA waste by an anaerobic hybrid reactor, it was found that upon sludge acclimation, the hybrid system could decompose PA at 4000 mg/L. At 35 °C and a organic loading of 20 g COD/L-day, 95% COD removal was achieved. About 89.5% of the decomposed PA was converted to methane. The residual COD mainly consisted of non-decomposed PA instead of degradation intermediates. This suggested that the rate-limiting step of biodegradation was the "ring cleavage". After one year operation, the biomass concentration reached 26.2 g VSS/L, and the sludge could lead to granulation, suggesting that phthalic waste could be effectively treated by the UASB system"--Abstract, page iii.

Advisor(s)

Huang, Ju-Chang, 1941-2018
TerKonda, Purush

Committee Member(s)

Lentz, Rodney
Morris, Charles Darwin
Bain, Lee J., 1939-

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

Ph. D. in Civil Engineering

Sponsor(s)

National Science Council, Taiwan
R&MRC, Taiwan

Publisher

University of Missouri--Rolla

Publication Date

Summer 1996

Journal article titles appearing in thesis/dissertation

• Biodegradation and methanogenic conversion of phthalic, isophthalic and terephthalic acids
• Treatment of phthalic waste by anaerobic hybrid reactor

Pagination

x, 59 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1996 Mao-Yuan Tur, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Subject Headings

Sewage sludge digestion
Sewage -- Purification -- Anaerobic treatment
Refuse and refuse disposal -- Biodegradation
Phthalic acid

Thesis Number

T 7174

Print OCLC #

36436224

Electronic OCLC #

962262303

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

Recommended Citation

Tur, Mao-Yuan, "Anaerobic treatment of high strength phthalic waste by a hybrid UASB-biofilter reactor" (1996). Doctoral Dissertations. 1155.
https://scholarsmine.mst.edu/doctoral_dissertations/1155