Removal of oil and oil sheen from produced water by pressure-assisted ozonation and sand filtration

Cha, Zhixiong; Lin, Cheng‐Fang; Cheng, Chia-Jung; Peng, Hong

doi:10.1016/j.chemosphere.2009.10.051

Cited by 34 publications

(11 citation statements)

References 11 publications

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“…PAO was originally proposed by Hong et al [15,16] for the advanced degradation of recalcitrant organic contaminants in water or sediment. Later, it was found that this technique could improve the solubility of activated sludge, thus enhance the solids reduction and biogas production in the anaerobic digestion of PAO treated activated sludge [17,18].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Cell Disruption of Chlorella Vulgaris by Pressure-Assisted Ozonation and Ultrasonication

et al. 2016

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This study evaluated the effectiveness of pressure-assisted ozonation (PAO) in Chlorella vulgaris (C. vulgaris) cell disruption, and compared the disruption result with that of the ultrasonication (US) by using four quantification indicators: cell counting, ultra violet (UV) absorbance, turbidity and visible light absorbance. It was found that under the condition of 0.8 MPa and 80 cycles, PAO treatment achieved cell rupture of 80.3%, with the power of 1080 W and treatment time of 60 min, US achieved cell rupture of 83.8%. Cell counting was a reliable indicator and applicable to both PAO and US treatments. Turbidity and visible light absorbance gave similar results and featured as the simplest operation. UV absorbance reflected the metabolite release due to cell breakage; however, it was less reproducible when it was applied to quantify the cell rupture by PAO. Its trend indicated that during cell disruption metabolite degradation occurred, especially after significant rupture in the case of excessive PAO treatment. The cellular morphology of C. vulgaris cells during PAO and US treatments was investigated by scanning electron microscope (SEM) which certified that the cells damage was caused by both physical and chemical attack.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Cell Disruption of Chlorella Vulgaris by Pressure-Assisted Ozonation and Ultrasonication

et al. 2016

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“…create organic pollution issued from industry, agricultural or urban areas. The most widely used methods to remove pollutants are adsorption (Froehner et al 2009), chemical and electro coagulation (Quinones et al 2009;El-Gohary & Tawfik 2009), flotation (Senaa et al 2009), filtration (Cha et al 2010), ion exchange (Li et al 2010), membrane separation (Damodar & You 2010), biological methods etc. Removal of dyes from wastewaters by EC is a popular method because of the high efficiency of the decolorization.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous decolorization of binary mixture of Reactive Yellow and Acid Violet from wastewaters by electrocoagulation

Keskin

Özdemir

Şengi̇l

2011

Water Science and Technology

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Dyes are common pollutants in a large variety of industrial wastewaters, and the treatment of these wastes has been extensively studied by coagulation. For the removal of pollutants from the wastewaters, different techniques have been used and electrocougulation is one of the widely used methods. This process is very effective in removing organic pollutants including dyestuff wastewater. The purposes of this study were to investigate the effects of the operating parameters, such as current density, electrolyte concentration, dyestuff concentration, and pH of solution on decolorization and chemical oxygen demand (COD) removal of wastewater containing two different dyes in same solution by direct current electrocoagulation. The amount of dye removed was found by application of first derivative spectrophotometric method to the synthetic dye mixtures. In this work synthetic dye mixture which include C.I. Reactive Yellow 145 (RY145) and C.I. Acid Violet 90 (AV 90) were used for electrocougulation (EC) process with iron electrodes. In the presence of both dye molecules, the optimum pH was found to be 4, optimum NaCI concentration was 3000 mg/L and optimum current density was 5.56 mA/cm2. Under these conditions in the case of 100 mg/L-1 each dye concentration at 20 degrees C and 3 cm interelectro distance the color removal efficiency was reached 97.7% for AV 90 and 97.1% for RY145 in 10 minutes time duration. Dye concentration dependent highest COD removal efficiency was measured as 82% around at 100 mg/L dye concentration.

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“…The treatment system usually requires a series of individual unit processes for contaminants removal that might not be removed through a single process. Usually, oily wastewater treatment in oilfield can typically be divided into three categories: (1) primary treatment, predominantly gravity‐based separation, and aimed to remove the largest dispersed oil droplets, and suspended particles, using methods like inclined plate (skimmer) and hydrocyclones 3,8 ; (2) secondary treatment, that aims at further reduction of dispersed oil content and the typical method was gas flotation 9 ;(3) tertiary treatment, often called water polishing step, which targets the ultra‐small droplets and particles, using methods like dual media filters, cartridge filters, and membranes 10 …”

Section: Introductionmentioning

confidence: 99%

“…(3) tertiary treatment, often called water polishing step, which targets the ultra-small droplets and particles, using methods like dual media filters, cartridge filters, and membranes. 10 At present, the process of oily wastewater treatment on offshore platforms is usually a three-stage process of inclined plate-air flotation-filtration. The floating oil and large dispersed oil droplets in oily wastewater can be removed in the inclined plate separator with the help of water clarifier [11][12][13][14][15][16] Small emulsified oil droplets are usually removed in the air flotation separator by using air flotation agent.…”

mentioning

confidence: 99%

The effect of molecular structure on the properties of cationic polyacrylate and its flocculation‐flotation performance of oilfield oily wastewater treatment

Zhang

Wang

et al. 2022

J of Applied Polymer Sci

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With the increasing amount of oily wastewater produced in the offshore oilfield, more efficient air flotation agent is needed to be developed. Cationic polyacrylate with amphiphilic structure has been found to be a type of potential efficient air flotation agent. However, the effect of molecular structure on its properties and performance was lack of research. In this paper, copolymers with tertiary amine as side group were synthesized by copolymerization of ethyl acrylate (EA) and tertiary amine monomers, and then a series of cationic polyacrylates were prepared by quaternization of tertiary amine with quaternization reagent.The effects of tertiary amine monomer type (including dimethylaminopropyl methacrylamide (DPM) and dimethylaminoethyl methacrylate (DEM)), quaternization reagent type (including 3-Chloro-1,2-Propanediol and 3-chloro-2-hydroxytrimethylammonium chloride) and quaternization degree on the cationic polyacrylate properties and its flotation performance were investigated. The experimental results showed that the flotation performance increased with the increasing hydrophilicity and cation degree of the hydrophilic unit in the cationic polyacrylate. When the tertiary amine monomer was DPM, quaternization reagent was 3-chloro-2-hydroxytrimethylammonium chloride, and theoretical quaternization degree was 100%, the oil removal of product PE-M-1.0 was the highest. When PE-M-1.0 dosage was 50 mg/L, gas flow was 1 L/min, flotation time was 10 min, its oil removal rate was higher than 95% in the range of 20-60 C. The results of zeta potential measurement and microfluidic experiment showed that PE-M-1.0 can increase the size of oil droplets by destroying the electric double layer on the surface of oil droplets and maintain the stability of bubbles, which was helpful for the improve of gas bubble-oil droplet collision probability and adhesion efficiency.

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Removal of oil and oil sheen from produced water by pressure-assisted ozonation and sand filtration

Cited by 34 publications

References 11 publications

Evaluation of Cell Disruption of Chlorella Vulgaris by Pressure-Assisted Ozonation and Ultrasonication

Evaluation of Cell Disruption of Chlorella Vulgaris by Pressure-Assisted Ozonation and Ultrasonication

Simultaneous decolorization of binary mixture of Reactive Yellow and Acid Violet from wastewaters by electrocoagulation

The effect of molecular structure on the properties of cationic polyacrylate and its flocculation‐flotation performance of oilfield oily wastewater treatment

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