Experimental Study on COD Composition and Electrochemical Degradation of Wastewater in Offshore Oilfields

Yang, Mo‐Hsiung; Jing, Bo; Chen, Wenjuan; Li, Qing; Yin, Xia

doi:10.1002/jccs.201600244

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…In addition to the photodegradation studies, chemical oxygen demand (COD) was studied separately to evaluate the mineralization tendency of indigo carmine. COD is an oxygen equivalent of the organic matter present in wastewaters . The analysis was performed with 10 mg of 10%GO–NT composite dispersed in 100 mL aqueous solutions of indigo carmine using the dichromate (K 2 Cr 2 O 7 ) method…”

Section: Resultsmentioning

confidence: 99%

“…COD is an oxygen equivalent of the organic matter present in wastewaters. [37] The analysis was performed with 10 mg of 10%GO-NT composite dispersed in 100 mL aqueous solutions of indigo carmine using the dichromate (K 2 Cr 2 O 7 ) method. [38] Aliquots of the dye under study were collected at time intervals of 15 min and precipitated.…”

Section: Mineralization Of Indigo Carminementioning

confidence: 99%

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Graphene oxide–nano‐titania composites for efficient photocatalytic degradation of indigo carmine

Somasekhar

Sanasi

2018

J Chinese Chemical Soc

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Nano‐titania composites assembled with variable weight percentages (wt%) of graphene oxide (GO) were synthesized, and their effectiveness as photocatalysts was investigated for the degradation of indigo carmine under visible light irradiation. Controlled hydrolysis of titanium tetrachloride (TiCl4) was performed in aqueous medium, and 1% aqueous solution of GO was added under ultrasonication. Depending on the wt% of GO, the materials were designated as 1, 2, 5, 10, 15 wt%GO–nano‐titania (GO–NT) composites. Their morphology and structural properties were characterized using X‐ray diffraction (XRD), UV–vis diffuse reflectance spectroscopy (UV–vis DRS), high‐resolution transmission electron microscopy (HRTEM), and field‐emission scanning electron microscopy (FE‐SEM). Excellent photocatalytic activity was demonstrated by the NT composite containing 10%GO in 60 min, and the required optimum conditions were established.

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Section: Resultsmentioning

confidence: 99%

Section: Mineralization Of Indigo Carminementioning

confidence: 99%

Graphene oxide–nano‐titania composites for efficient photocatalytic degradation of indigo carmine

Somasekhar

Sanasi

2018

J Chinese Chemical Soc

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“…The preparation of reagent E is relatively simple, need to add 2.5 g of silver sulfate to 250 mL of concentrated sulfuric acid and leave it for 1-2 days. After matching the relevant testing reagents, we used the laboratory's 5B-3A COD rapid tester (Shanghai Reunion Scientific Instrument Co., Ltd) to detect the COD of the four water samples (Yang et al 2017).…”

Section: Sample Collection and Analysismentioning

confidence: 99%

Change the original microbial community structure in the hydrolysis acidification tank to enhance the COD removal performance of oily wastewater

Zhao

Yang

et al. 2021

Water Science and Technology

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The hydrolysis acidification tank mainly relies on microorganisms to treat oily sewage, but in many cases the COD of the effluent from the hydrolysis acidification tank does not decrease or even increase. In this paper, about 50 L of oily wastewater is treated in a facultative anaerobic hydrolysis acidification tank with a temperature of 29 °C, pH 6, high-throughput sequencing technology analyzes found that after long-term operation of the hydrolysis and acidification tank, the dominant bacterial Pseudomonas accounted for only 2.87%, at this time, the effluent COD of the hydrolysis and acidification tank was 450 mg/L. Pseudomonas stutzeri LH-42 a strain screened in the laboratory, which was domesticated and colonized in the hydrolysis acidification tank. High-throughput sequencing and bioinformatics analysis showed that the proportion of Pseudomonas in the hydrolysis acidification tank reached 5.89%, the effluent COD of the hydrolysis and acidification tank was 200 mg/L. The above results indicate the importance of the proportion of Pseudomonas in the hydrolysis and acidification tank to the COD degradation of oily wastewater.

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“…In the process of oil and gas field oil production, the produced water is of poor quality and complex composition [1]. It generally has high salt content, high COD value, large polymer content, and large oil content [2,3]. Some also contain small amounts of heavy metals and bacteria [4].…”

Section: Introductionmentioning

confidence: 99%

Characteristics Analysis and Corrosion Inhibition in Typical Produced Water of Jidong Oilfield

Chen

2021

E3S Web Conf.

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The composition of oilfield water is complex and diverse. The development and application of corrosion inhibitors can effectively inhibit the corrosion of pipelines and equipment by oilfield water. The ions in produced water of Jidong Oilfield were determined by instrumental analysis and chemical analysis. Triazine prepared from ethanolamine and formaldehyde as corrosion inhibitor was evaluated by weight loss method. The corrosion inhibition experiments were carried out in ancient water samples, and the effects of concentration and temperature on corrosion inhibition were investigated. Finally, corrosion inhibitors were applied to the corrosion inhibition of produced water with different compositions in Jidong Oilfield, the corrosion inhibition of steel sheet was evaluated under different salinity conditions, and the effects of various ion contents in typical water samples and salinity on corrosion inhibition were analyzed. The experimental results show that the corrosion inhibition effect of triazine is better, and the product can be used in various water samples in oilfield with the inhibition efficiency above 85%.

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Experimental Study on COD Composition and Electrochemical Degradation of Wastewater in Offshore Oilfields

Cited by 11 publications

References 13 publications

Graphene oxide–nano‐titania composites for efficient photocatalytic degradation of indigo carmine

Graphene oxide–nano‐titania composites for efficient photocatalytic degradation of indigo carmine

Change the original microbial community structure in the hydrolysis acidification tank to enhance the COD removal performance of oily wastewater

Characteristics Analysis and Corrosion Inhibition in Typical Produced Water of Jidong Oilfield

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