+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

High rate treatment of terephthalic acid production wastewater in a two-stage anaerobic bioreactor

High rate treatment of terephthalic acid production wastewater in a two-stage anaerobic bioreactor

Biotechnology and Bioengineering 91(2): 169-179

The feasibility was studied of anaerobic treatment of wastewater generated during purified terephthalic acid (PTA) production in two-stage upflow anaerobic sludge blanket (UASB) reactor system. The artificial influent of the system contained the main organic substrates of PTA-wastewater: acetate, benzoate, and terephthalate. Three parallel operated reactors were used for the second stage, and seeded with a suspended terephthalate degrading culture, with and without additional methanogenic granular sludge (two different types). The first stage UASB-reactor was seeded with methanogenic granular sludge. Reactors were operated at 37 degrees C and pH 7. During the first 300 days of operation a clear distinction between the biomass grown in both reactor stages was obtained. In the first stage, acetate and benzoate were degraded at a volumetric loading rate of 40 g-COD/L . day at a COD-removal efficiency of 95% within the first 25 days of operation. No degradation of terephthalate was obtained in the first stage during the first 300 days of operation despite operation of the reactor at a decreased volumetric loading rate with acetate and benzoate of 9 g-COD/L . day from day 150. Batch incubation of biomass from the reactor with terephthalate showed that the lag-phase prior to terephthalate degradation remained largely unchanged, indicating that no net growth of terephthalate degrading biomass occurred in the first stage reactor. From day 300, however, terephthalate degradation was observed in the first stage, and the biomass in this reactor could successfully be enriched with terephthalate degrading biomass, resulting in terephthalate removal capacities of 15 g-COD/L . day. Even though no single reason could be identified why (suddenly) terephthalate degradation was obtained after such a long period of operation, it is suggested that the solid retention time as well the prevailing reactor concentrations acetate and benzoate may have played an important role. From day 1 of operation, terephthalate was degraded in the second stage. In presence of methanogenic granular biomass, high terephthalate removal capacities were obtained in these reactors (15 g-COD/L . day) after approximately 125 days of operation. From the results obtained it is concluded that terephthalate degradation is the bottleneck during anaerobic treatment of PTA-wastewater. Pre-removal of acetate and benzoate in staged bioreactor reduces the lag-phase prior to terephthalate degradation in latter stages, and enables high rate treatment of PTA-wastewater.

(PDF emailed within 0-6 h: $19.90)

Accession: 004185455

Download citation: RISBibTeXText

PMID: 15889396

DOI: 10.1002/bit.20502

Related references

High-rate anaerobic treatment of purified terephthalic acid wastewater. Water Science & Technology 42(5-6): 259-268, 2000

A two-stage anaerobic system for biodegrading wastewater containing terephthalic acid and high strength easily degradable pollutants. Journal of Environmental Sciences 14(4): 474-481, 2002

Two-stage anaerobic treatment of purified terephthalic acid production wastewaters. Water Science & Technology 42(5-6): 277-282, 2000

Anaerobic treatment of a petrochemical wastewater from a terephthalic acid plant. Water Science & Technology 25(7): 223-235, 1992

Anaerobic pre-treatment of petrochemical effluents: Terephthalic acid wastewater. Water Science and Technology 36(2-3): 237-248, 1997

Treatment of terephthalic acid plant wastewater with an anaerobic fixed film reactor. Environmental Technology 11(3): 239-248, 1990

Terephthalic acid wastewater treatment by using two-stage aerobic process. Journal of Environmental Sciences (China) 11(1): 93-99, March, 1999

High rate biological nutrient removal from high strength wastewater using anaerobic-circulating fluidized bed bioreactor (A-CFBBR). Bioresource Technology 118: 526-535, 2012

Two-stage anaerobic fluidized-bed membrane bioreactor treatment of settled domestic wastewater. Water Science and Technology 68(2): 394-399, 2013

Case history: Two stage, low-rate anaerobic treatment facility for South American alcochemical/citric acid wastewater. Water Science & Technology 38(4-5): 45-52, Aug -Sept, 1998

The Buoyant Filter Bioreactor: a high-rate anaerobic reactor for complex wastewater--process dynamics with dairy effluent. Water Research 39(6): 993-1004, 2005

High-rate continuous production of lactic acid by Lactobacillus rhamnosus in a two-stage membrane cell-recycle bioreactor. Biotechnology and bioengineering 73(1): 25-34, 2001

High-concentration food wastewater treatment by an anaerobic membrane bioreactor. Water Research 39(17): 4110-4118, 2005

The treatment of high strength wastewater containing high concentrations of ammonium in a staged anaerobic and aerobic membrane bioreactor. Journal of Environmental Engineering and Science 1(4): 303-310, 2002