Organic compounds at different stages of a refinery wastewater treatment plant

Gulyas, Holger; Reich, Margrit

doi:10.2166/wst.1995.0215

Cited by 6 publications

(6 citation statements)

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“…Diesel oil is rich in aliphatic hydrocarbons and typically contains n‐alkanes from C9 to C20. This is similar to the range of n‐alkanes reported for wastewater from a mineral oil refinery (C11C25) 26. Characteristics of synthetic wastewater with 0.6% (v/v) diesel was as follows (mg L −1 ): alkalinity as CaCO 3 (58), ammonical nitrogen (NH 4 + ‐N) (0.066), nitrate nitrogen (NO 3 − ‐N) (40), phosphate phosphorus (PO 4 3− ‐P) (7), total chemical oxygen demand (TCOD) (4512.56) and TPH (4961.4).…”

Section: Methodssupporting

confidence: 86%

Effect of co‐contaminant phenol on performance of a laboratory‐scale RBC with algal‐bacterial biofilm treating petroleum hydrocarbon‐rich wastewater

Chavan

Mukherji

2010

J of Chemical Tech & Biotech

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Section: Methodssupporting

confidence: 86%

Effect of co‐contaminant phenol on performance of a laboratory‐scale RBC with algal‐bacterial biofilm treating petroleum hydrocarbon‐rich wastewater

Chavan

Mukherji

2010

J of Chemical Tech & Biotech

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“…Inlet Split used 100:1; temperature programrned 50 to 200º C at 8º C/min, column flow rate: 1.5 mL/min. He Retention times: n-eicosane: 33-34 min, toluene: 7.6-8 min and benzene: 5.8-6 min [12] (Gulyas and Reich, 1995). Total removal of each compound was quantified as follows:…”

Section: Analysesmentioning

confidence: 99%

Biodegradation of n-eicosane and VOCs: Cometabolism in a marine consortium

et al. 2013

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Several batch scale assays were performed in order to establish a correlation between the microbial removals of neicosane, in presence of different concentrations of volatile organic compounds (VOCs) which showed a partial removing.The selected VOCs were toluene and benzene. Results with benzene showed that the removal of this aromatic compoundwas decreased in presence of n-eicosane and the lowest removal was obtained when VOC concentration was higher. Theremoval of hydrocarbon was increased when VOC concentration was increased. In the assays with toluene, n-eicosanereached a higher removal when VOC concentration was increased, but the aromatic compound showed a decrease in itselimination dynamics. Control assays performed with VOCs at 28 mg/L without hydrocarbon showed higher removaldynamics for benzene than toluene. Also control assays of n-eicosane at two different concentrations but without anyVOC showed that its removal dynamic decreased in the absence of the aromatic compounds for both assays. The kineticadjustrnent obtained for toluene (Hill kinetic model) showed that the removal rate of this compound increased while itsconcentration at water-phase was higher. Although, when it was used a concentration of 50 mg/L or higher, the removalrate became almost constant. For benzene, the higher removal rate was reached with 38 mg/L. With higher concentration,the kinetic model showed inhibition, so the adjustrnent analyses fitted for a Monod kinetic model. n-Eicosane showed abetter adjustrnent with the Haldane kinetic model with an initial concentration of 188 mg/L for the highest removal rate.

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“…There was an increasing concern in the 1980's regarding the carcinogenic or mutagenic potential of specific compounds and groups of compounds, even when present in low (trace) concentrations (Dold, 1989). This led to the compilation of priority pollutant lists, and the identification of specific chemical components in effluents from petroleum refineries (API, 1978;Burks, 1982;PACE, 1985;PACE, 1987;Gulyas, 1995). These chemical-specific monitoring programs were initially used to regulate toxicity, but they have several shortcomings.…”

Section: Environmental Regulationsmentioning

confidence: 99%

“…Since BTEX, MTBE, EPH, and phenols do not significantly contribute to toxicity, the major source of toxicity is still unknown. Many other compounds have been detected in refinery wastewaters, and their contribution to toxicity is not fully understood (PACE, 1985;Greenshields etal., 1987;Dold, 1989;MOE, 1989;Gulyas, 1995). As discussed in Section 2.3.1, there has been little success in trying to identify the compounds contributing to toxicity in refinery wastewaters.…”

Section: Phenols and Ephmentioning

confidence: 99%

Removal of Oxygen Demand and Acute Toxicity during Batch Biological Treatment of a Petroleum Refinery Effluent

Sarathy

Hoy

Duff

2002

Water Quality Research Journal

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This study was undertaken in order to investigate the removal of oxygen demand and acute toxicity from a petroleum refinery effluent. The results of this study provide a better understanding of the biodegradation process occurring at the Chevron refinery wastewater treatment plant (WWTP) in Burnaby, BC. The WWTP consists of a deep shaft bioreactor followed by a dissolved air flotation clarifier and effluent polishing biofilters. The treatment plant is able to degrade approximately 75% of the COD and 95% of the BOD present in the wastewater. During the study period, the toxicity of the wastewater before and after treatment was 1.9±0.12 (%v/v) and 25.4±5.9 (%v/v), respectively (as measured by the 5 minute Microtox™ assay in EC50 units).The experimental program utilized two batch bioreactors operated at 35°C to characterize the removal of organic compounds (as measured by BOD and COD), and to deterrnine the capacity of the biomass for acute toxicity removal. A six-litre batch bioreactor was operated for 52.5 hours (Run 1), and a 15 L batch bioreactor was operated for 120 hours (Run 2). In order to assess the abiotic rate of volatilization, a stripping test was also performed using the six-litre batch reactor.In both runs, the BOD and COD reduction occurred over the first 24 hours of treatment. The BOD removal was 92-96%, and the COD removal was 73-75%. These values are similar to the removal levels reported at the Chevron refinery WWTP. Stripping accounted for 3% of the COD removal over 52.5 hours. Since stripping was insignificant, the compounds contributing to BOD and COD were most likely removed via biodegradation.Both runs showed similar patterns of toxicity removal. Rather than being continuously removed, as in the case of BOD and COD, toxicity appeared to be removed in discrete stages. The first stage of toxicity removal corresponded to the degradation of BOD and COD, and the second stage occurred after BOD and COD had been removed. The raw wastewater in Runs 1 and 2 had a 5-minute EC50 of 4.6+0.5% and 4.9±0.4%, respectively. In Run 1, the toxicity was reduced to a 5-rninute EC50 of 7.9±0.7% in 10 hours, and further removal did not occur until after 28 hours. In Run 2, a 5-minute EC50 of 16±3.2% was achieved over the first 10 hours, and the toxicity remained at this level until 48 hours. A second significant toxicity removal step between 48 and 72 hours resulted in a final 5-minute EC50 of 27.8±1.6%.ii Process ChemicalsCaustic soda, sulphuric and phosphoric acid,

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Organic compounds at different stages of a refinery wastewater treatment plant

Cited by 6 publications

References 0 publications

Effect of co‐contaminant phenol on performance of a laboratory‐scale RBC with algal‐bacterial biofilm treating petroleum hydrocarbon‐rich wastewater

Effect of co‐contaminant phenol on performance of a laboratory‐scale RBC with algal‐bacterial biofilm treating petroleum hydrocarbon‐rich wastewater

Biodegradation of n-eicosane and VOCs: Cometabolism in a marine consortium

Removal of Oxygen Demand and Acute Toxicity during Batch Biological Treatment of a Petroleum Refinery Effluent

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