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oil refinery wastewater treatment

Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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oil refinery wastewater treatment
Chemical oxygen demand - WikiMili The Best Wikipedia Reader
Chemical oxygen demand - WikiMili The Best Wikipedia Reader

Most commonly, a 0.25 N ,solution, of ,potassium dichromate, is used for COD determination, although for samples with COD below 50 mg/L, a lower concentration of ,potassium dichromate, is preferred. In the process of oxidizing the organic substances found in the water sample, ,potassium dichromate, is reduced (since in all redox reactions, one reagent is oxidized and the other is reduced), forming Cr 3+ .

Removal of Cr( vi ) from wastewater by a two-step method ...
Removal of Cr( vi ) from wastewater by a two-step method ...

FA was obtained from the Yangliuqing Thermal Power ,Plant, of Tianjin. Cr(VI) was prepared at 100 mg L −1. ,Potassium dichromate, (K 2 Cr 2 O 7), hydrochloric ,acid, (HCl), sulfuric ,acid, (H 2 SO 4), nitric ,acid, (HNO 3), sodium hydroxide (NaOH), and oxalic ,acid, (H 2 C 2 O 4) were of analytical grade.

Comparative Studies of Removal of Hexavalent Chromium Cr ...
Comparative Studies of Removal of Hexavalent Chromium Cr ...

dissolving 2.282 g of 99% ,potassium dichromate, in one liter of distilled water to prepare 1000 mg/L of chromium stock ,solution,. From the stock ,solution,, different initial concentrations of 50, 100, 200, 300, 400 and 500 mg/L were prepared by dilution. Solutions of 0.1 N sodium hydroxide (NaOH) and 0.1 N sulfuric ,acid, (H 2 SO 4) were used for pH

Chromium(VI) Accumulation and Tolerance by Tradescantia ...
Chromium(VI) Accumulation and Tolerance by Tradescantia ...

as ,potassium dichromate, (K 2Cr 2O 7)fromitsstocksolution(100mgL −1). The pH of Cr ,solution, and control tap water ranged between 6.8 and 7.0. The nutrient ,solution, in each container was replaced with a fresh medium every 4 days during the experi-ments. Growth conditions of the plants were the same as noted earlier in‘Screening

Adsorption of Cr(VI) from Aqueous Solution onto a ...
Adsorption of Cr(VI) from Aqueous Solution onto a ...

ºC for 24 h. Then this carbon was washed to get it ,acid, free and its pH was checked. The carbonized adsorbents were dried and rewashed many times until its pH reaches 7. After this the activated carbon was deacidified by use of distilled water and sodium bicarbonate ,solution, in later stages. Deacidification was done in following manner.

JOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR ...
JOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR ...

pH adjustment is achieved with the use of sulphuric ,acid, whereby the pH is reduced to 2-3. At this level, the reduction of Cr+6 to Cr+3 can be achieved very efficiently. The equalization technique where acidic waste from some other ,plant, is mixed with the liquid waste can also be …

Remediation of chromium contaminated soil by microbial ...
Remediation of chromium contaminated soil by microbial ...

Plant MFCs (PMFCs) introduce plants into the MFC system and use plant rhizosphere secretion and other organic matter in soil to generate electric energy [36–39]. Previous studies have shown that plant MFCs can produce electricity and reduce organic pollution in wastewater simultaneously. At the same time, it is very popular to inject wastewater

Journal of Molecular Catalysis A: Chemical
Journal of Molecular Catalysis A: Chemical

electroplating,, textile dyeing, paint, leather tanneries, ... ,there, is an urgent need to remove phenol from the ,wastewater,. Hence, the reduction of Cr(VI) into Cr(III) received great ... elsewhere [38]. ,Potassium dichromate, (K2Cr2O7), and caffeic ,acid, (3,4-dihydroxycinnamic ,acid,, …

ANAEROBIC TREATMENT OF POLYETHYLENE GLYCOL(PEG ...
ANAEROBIC TREATMENT OF POLYETHYLENE GLYCOL(PEG ...

WASTEWATER, IN A FIXED-BED REACTOR Satoto E. Nayono ... as one component in copper ,electroplating solution, which acts as a brightener and stabilizer to enhancethe copper deposition rate ... Nordmann (1977) using ,potassium dichromate, (K2Cr2O7) in a mixture of sulphuric ,acid, and phosphoric ,acid, ...

(PDF) ADSORPTION PROCESS FOR WASTEWATER TREATMENT …
(PDF) ADSORPTION PROCESS FOR WASTEWATER TREATMENT …

Under the pH ( 3), temperature (20-30oC) and reducing - oxidizing conditions commonly found in industrial wastewaters, the predominant species are bicarbonate, HCrO -4, ,dichromate, Cr2O7-2 and Cr+3. It is interesting to note that the divalent chromium ions, Cr+2, may be found in …

ANAEROBIC TREATMENT OF POLYETHYLENE GLYCOL(PEG ...
ANAEROBIC TREATMENT OF POLYETHYLENE GLYCOL(PEG ...

WASTEWATER, IN A FIXED-BED REACTOR Satoto E. Nayono ... as one component in copper ,electroplating solution, which acts as a brightener and stabilizer to enhancethe copper deposition rate ... Nordmann (1977) using ,potassium dichromate, (K2Cr2O7) in a mixture of sulphuric ,acid, and phosphoric ,acid, ...

Absorption Activity of Cassava Peel (Manihot utilissima ...
Absorption Activity of Cassava Peel (Manihot utilissima ...

Electroplating, is a process of metal veneering with another metal using the electric energy. The heavy metals found in the content of ,electroplating, waste have high

Chromium(VI) Accumulation and Tolerance by Tradescantia ...
Chromium(VI) Accumulation and Tolerance by Tradescantia ...

as ,potassium dichromate, (K 2Cr 2O 7)fromitsstocksolution(100mgL −1). The pH of Cr ,solution, and control tap water ranged between 6.8 and 7.0. The nutrient ,solution, in each container was replaced with a fresh medium every 4 days during the experi-ments. Growth conditions of the plants were the same as noted earlier in‘Screening

Journal of Molecular Catalysis A: Chemical
Journal of Molecular Catalysis A: Chemical

electroplating,, textile dyeing, paint, leather tanneries, ... ,there, is an urgent need to remove phenol from the ,wastewater,. Hence, the reduction of Cr(VI) into Cr(III) received great ... elsewhere [38]. ,Potassium dichromate, (K2Cr2O7), and caffeic ,acid, (3,4-dihydroxycinnamic ,acid,, …

Adsorption of Cr(VI) from Aqueous Solution onto a ...
Adsorption of Cr(VI) from Aqueous Solution onto a ...

ºC for 24 h. Then this carbon was washed to get it ,acid, free and its pH was checked. The carbonized adsorbents were dried and rewashed many times until its pH reaches 7. After this the activated carbon was deacidified by use of distilled water and sodium bicarbonate ,solution, in later stages. Deacidification was done in following manner.

Effects of pH and Photocatalyst Concentration on ...
Effects of pH and Photocatalyst Concentration on ...

MATERIALS AND METHODS. Materials: A synthetic waste solution of 50 ppm Cr (VI) was made by dissolving potassium dichromate K 2 Cr 2 O 7, resembling to chromium containing waste water from a medium scale electroplating plant in Bandung, Indonesia. The photocatalyst used was Merck TiO 2, consists of 99% anatase TiO 2.

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