Treatment of coal gasification wastewater by a two-continuous UASB system with step-feed for COD and phenols removal

Wang, Wei; Han, Hongjun; Yuan, Min; Li, Huiqiang; Fang, Fang; Wang, Ke

doi:10.1016/j.biortech.2010.10.019

Cited by 140 publications

(40 citation statements)

References 28 publications

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“…Phenols are highly toxic compounds even at low concentrations and the discharge of the wastewater containing phenols is restricted severely. High concentrations of thiocyanate and ammonium are toxic to aquatic species and vertebrates (Albuquerque et al, 2009;Heming et al, 1985;Wang et al, 2010b). Removal of organic and inorganic pollutants from the coal gasification wastewater is a complicated process and all contaminants must be treated simultaneously and effectively.…”

Section: Introductionmentioning

confidence: 99%

Removal of phenols, thiocyanate and ammonium from coal gasification wastewater using moving bed biofilm reactor

Han

et al. 2011

Bioresource Technology

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144

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Section: Introductionmentioning

confidence: 99%

Removal of phenols, thiocyanate and ammonium from coal gasification wastewater using moving bed biofilm reactor

Han

et al. 2011

Bioresource Technology

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144

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“…WSD. Wang et al (2011) also found phenol, 2,5-bis(1,1-dimethylethyl) in the effluent of Environ Earth Sci coal gasification wastewater after aerobic biodegradability. And in our investigation of the soil and groundwater samples in the karst system in 2013, we also detected phenol, 2,5-bis(1,1-dimethylethyl).…”

Section: Identification Of Pahs Degradation Pathwaymentioning

confidence: 95%

Biodegradation of PAHs by Acinetobacter isolated from karst groundwater in a coal-mining area

Shao

Wang

et al. 2015

Environ Earth Sci

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A bacterial strain Acinetobacter sp. WSD with phenanthrene-degrading ability was identified based on biochemical tests and 16S rDNA gene sequence analysis. The strain was isolated from polycyclic aromatic hydrocarbons (PAHs)-contaminated groundwater from a coalmining area of the Guozhuang karst water system in Shanxi province of northern China. Acinetobacter sp. WSD could utilize fluorine (FLO), phenanthrene (PHE) and pyrene (PYR) as its sole carbon source and was able to degrade other PAHs. Approximately 90 % of FLO, 90 % of PHE and 50 % of PYR were degraded after 6 days' incubation. The logistic model well fitted all the experimental data. The specific degradation rates in glucose were higher than that in HCO 3 -, indicating that organic carbon source promoted the growth of Acinetobacter sp. WSD and the degradation of PAHs. In presence of humic acids (HA), the total degradation rate was accelerated, although there was a delay at the beginning. In the case of high HA concentration, co-metabolism between PAHs and HA occurred. The metabolic pathway for the three compounds of PAHs was discussed using GC-MS data. Phthalic acid was found in their metabolites. Phenol, 2,5-bis(1,1-dimethylethyl), a new type of PAHs metabolites that have been reported before was found after 2 days degradation.

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“…Moreover, we determined the dissolved oxygen (DO) in anaerobic BERs from the beginning to the end of experiment and found that the value of DO was lower than 0.04 mg/L. Four BERs were filled with 0.5 L solution containing 5000 mg L −1 (MLSS) suspended biomass, 250 mg L −1 phenol, 66.9 mg L −1 NH 4 Cl, 15.5 mg L −1 KH 2 PO 4 , and a trace element solution, which contained (Wang et al 2011). Two reactors were applied with DC, and the others had no DC applied.…”

Section: Anaerobic Sludge Operationmentioning

confidence: 99%

Phenol Degradation by Suspended Biomass in Aerobic/Anaerobic Electrochemical Reactor

Ailijiang

Chang

et al. 2016

Water Air Soil Pollut

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The effect of direct current (DC) on phenol biodegradation under aerobic/anaerobic condition was investigated in this study using a bioelectrochemical reactor. It was found that phenol biodegradation was inhibited with current ranged from 10 to 40 mA. The growth of biomass was reduced to 43.2 ± 6.6 % for aerobic sludge and 38.6 ± 7.3 % for anaerobic sludge, but the loosely bound extracellular polymer substances (LB-EPS) were increased 91.2 ± 1.3 % for aerobic sludge and 62.8 ± 0.8 % for anaerobic sludge as the current increased from 10 to 40 mA. Adenosine triphosphate (ATP) content of aerobic sludge was also reduced 0.481 ± 0.04-fold and 0.512 ± 0.05-fold lower and 1.34 ± 0.13-fold higher than that of the control when the current was increased from 10 to 40 mA. The results of phosphate buffer saline adding treatment indicated that lower pH caused by a DC above 10 mA was responsible for the reduced phenol biodegradation, leading to the reduction of biomass. However, lower intensity of current (5 mA) had no significant impact on phenol degradation rate, pH, LB-EPS, ATP content, and cell growth of aerobic/anaerobic sludge. These results give us a more detailed understanding of the effects of electricity on the treatment of phenol containing wastewater.

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Treatment of coal gasification wastewater by a two-continuous UASB system with step-feed for COD and phenols removal

Cited by 140 publications

References 28 publications

Removal of phenols, thiocyanate and ammonium from coal gasification wastewater using moving bed biofilm reactor

Removal of phenols, thiocyanate and ammonium from coal gasification wastewater using moving bed biofilm reactor

Biodegradation of PAHs by Acinetobacter isolated from karst groundwater in a coal-mining area

Phenol Degradation by Suspended Biomass in Aerobic/Anaerobic Electrochemical Reactor

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