Application of sequential expanded granular sludge bed reactors for biodegradation of acetate, benzoate, terephtalate and p-toluate in purified terephtalic acid production wastewater

The anaerobic degradation of four major constituents from purified terephtalic acid production wastewater in sequential two expanded granular sludge bed (EGSB) reactors was studied. The performance of the system was evaluated in terms of chemical oxygen demand (COD) removal efficiencies, methane pro...

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Bibliographic Details
Published in:Environmental technology 2016-05, Vol.37 (9), p.1141-1150
Main Authors: Lee, Y.S., Han, G.B.
Format: Article
Language:English
Subjects:
Acetates
Acetates - isolation & purification
Acetates - metabolism
Anaerobic treatment
Anaerobiosis
Bacteria
Benzoates - isolation & purification
Benzoates - metabolism
Biodegradation
Biodegradation, Environmental
Biological Oxygen Demand Analysis
Bioreactors - microbiology
Chemical oxygen demand
EGSB
Equipment Design
Methane
Methane - metabolism
Oxygen demand
Phthalic Acids - isolation & purification
Phthalic Acids - metabolism
PTA
Reactors
Sewage - microbiology
Sludge
two-stage
Waste Disposal, Fluid - instrumentation
Waste water
Waste Water - microbiology
wastewater
Water Pollutants, Chemical - isolation & purification
Water Pollutants, Chemical - metabolism
Water treatment
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Summary:The anaerobic degradation of four major constituents from purified terephtalic acid production wastewater in sequential two expanded granular sludge bed (EGSB) reactors was studied. The performance of the system was evaluated in terms of chemical oxygen demand (COD) removal efficiencies, methane production, stability, granular sludge adaptability as well as reversion of bacterial inhibition. With volumetric loading rates of 1.9–25 kg-COD m ⁻³ d ⁻¹ and terephtalate and p -toluate of 584–821 mg L ⁻¹, average removal efficiencies of 97.6% and 75.2% were achieved in the EGSB reactors, respectively. In these conditions, gas production reached a total methane production rate of 0.33 L g-COD ⁻¹ in the two-stage EGSB reactor system. The disturbance of the EGSB reactors was observed at a feed concentration above around 6.9 g-COD L ⁻¹ because of higher influent COD concentration compared to other experiments.
ISSN:1479-487X
0959-3330
1479-487X
DOI:10.1080/09593330.2015.1102973