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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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TREATING INDUSTRIAL WASTEWATER – Flexi Systems
TREATING INDUSTRIAL WASTEWATER – Flexi Systems

Customised Industrial ,Wastewater Treatment, Systems Our High Concentration Cyanide Decomposition System can treat ,wastewater containing, cyanide with concentrations of up to hundred thousands PPM and achieve 99.99% removal rate.

Effect of Hexavalent Chromium on Performance of Membrane ...
Effect of Hexavalent Chromium on Performance of Membrane ...

In this study, the performance of a membrane bioreactor (MBR) for the ,treatment, of synthetic domestic ,wastewater, in the presence of ,chromium, was investigated. The carbonaceous pollutant removal is not affected by Cr(VI) with concentration ranging from 0.4 to 10 mg/L; it becomes slightly lower when the Cr(VI) is 50 mg/L.

Removal of Cr(VI) ions from waste water by ...
Removal of Cr(VI) ions from waste water by ...

by a welded and insulated vertical ,iron, strip to act as a current feeder. The cathode and anode are separated by a perforated plastic sheet of a 1 mm thickness. The electrical circuit consists of a digital DC power supply (20 V, 5 A). 2.2. Reagents and analytical procedures Before each run a known weight ,of potassium dichromate, was

Review of Chromium Residue and Chromium-containing Waste ...
Review of Chromium Residue and Chromium-containing Waste ...

after the detoxification and curing ,the ,chromium, leaching-out toxicity less than 8 (HJ/T299), be dumped into the second general industrial solid waste landfill according to standard of GB18599. Cr-,containing Wastewater Treatment, In leather processing, ,chromium, ore …

Removal of Hexavalent Chromium-Contaminated Water and ...
Removal of Hexavalent Chromium-Contaminated Water and ...

20/11/2008, · Cr(VI) is a well-known highly toxic metal, considered a priority pollutant. Industrial sources of Cr(VI) include leather tanning, cooling tower blowdown, plating, electroplating, anodizing baths, rinse waters, etc. This article includes a survey of removal techniques for Cr(VI)-contaminated aqueous solutions. A particular focus is given to adsorption, membrane filtration, ion exchange, and ...

THE EFFECT OF ACID PRE-TREATMENT ON THE BIOSORPTION …
THE EFFECT OF ACID PRE-TREATMENT ON THE BIOSORPTION …

THE EFFECT ,OF ACID, PRE-,TREATMENT, ON THE BIOSORPTION OF ,CHROMIUM,(III) BY ,SPHAEROTILUS NATANS FROM INDUSTRIAL WASTEWATER, CARLO SOLISIO, ALESSANDRA LODI, ATTILIO CONVERTI* and MARCO DEL BORGHI Dipartimento di Ingegneria Chimica e di Processo ‘‘G.B. Bonino’’, Genoa University, Via Opera Pia 15, I-16145, Genoa, Italy

Removal of Chromium (VI) metal ions from waste water using ...
Removal of Chromium (VI) metal ions from waste water using ...

acid treatment, for the removal of lignin before application in order to increase their efficiency. (4) Non-conventional adsorbents require less maintenance and supervision. [13] 1.1 SOURCES OF ,CHROMIUM Chromium, emission sources can be divided into two broad classes, direct and indirect. The direct category primarily

Determination of the Efficiency of Different Modified ...
Determination of the Efficiency of Different Modified ...

potassium, chloride, sodium hydroxide, sulphuric ,acid,, ,potassium dichromate,, silver sulfate were of analytical grade and purchased from Merck. Distilled water was used for the preparation of solutions. Standard solutions ,of potassium dichromate, (K 2 Cr 2 O 7), sulfuric ,acid, (H 2 SO 4) reagent with silver sulfate (Ag 2 SO 4

Chromium Adsorption on Banana Rachis Adsorbent from ...
Chromium Adsorption on Banana Rachis Adsorbent from ...

in industrial ,wastewater treatment,, especially chrome tanning ,wastewater, in the tannery. KEYWORDS Environment, ... It has been assessed that around 22×103 m3 of ,wastewater,, including ,chromium,, is discharged daily into the ... untreated ,wastewater containing, Cr were analyzed and filtered through a 0.45 µm pore size filter.

Performance Evaluation of Electrocoagulation Process for ...
Performance Evaluation of Electrocoagulation Process for ...

trated sulfuric ,acid,, and ,potassium, chloride were an-alytical grade. Desired concentrations of chromium solution were prepared by mixing proper amount ,of potassium dichromate, with deionized water. In or-der to increase the conductivity of the solutionto 1.6 mS cm−1, ,potassium, chloride (1 N) wasadded tothe

Tertiary treatment of wastewater by electro-coagulation ...
Tertiary treatment of wastewater by electro-coagulation ...

discontinuous reactor with two electrodes: ,iron,-,iron, for EC ,iron, or EF ,iron, and ,iron,-platinum for AEO Pt. The specific surface areas of the electrodes were 28.5 cm2 and 8 cm2 for ,iron, and platinum electrodes, respectively. The ,electrode, gap was 2 cm. The solution volume was 0.5 dm3. The temperature was kept constant at 25 °C.

Tannery Wastewater Treatment
Tannery Wastewater Treatment

Tannery ,Wastewater Treatment, ... involves the ,treatment, of hides with sodium chloride and ,acid,, to prevent precipitation of the ,chromium, salts on the skin fibers. ... ,Chromium,, after ,treatment, in chrome ,wastewater, stream 45 Vegetable tanneries pH 6.5 to 9.0 SS Not to exceed 600.

Removal of Chromium from Industrial Wastewater by ...
Removal of Chromium from Industrial Wastewater by ...

chromium, forms [6]; however, concerns regarding the presence of ,Chromium, in the environment focus on the potential adverse health effects of Cr (VI)-contaminated soils, groundwater, and drinking water supplies. Hexavalent ,chromium, is more hazardous, carcinogenic, and mutagenic and the most water soluble which easily enters to living cells [7].

Tannery Wastewater Treatment
Tannery Wastewater Treatment

Tannery ,Wastewater Treatment, ... involves the ,treatment, of hides with sodium chloride and ,acid,, to prevent precipitation of the ,chromium, salts on the skin fibers. ... ,Chromium,, after ,treatment, in chrome ,wastewater, stream 45 Vegetable tanneries pH 6.5 to 9.0 SS Not to exceed 600.

Wastewater Treatment during PCB Fabrication Process | PSPCB
Wastewater Treatment during PCB Fabrication Process | PSPCB

This process produces copper-,containing wastewater,, sulfuric ,acid, mist. (10) Soldermask ... PCB ,wastewater treatment, is mainly divided into the chemical method and physical method. ... and the cyanide-,containing wastewater, and the ,chromium,-,containing wastewater, in the circuit board are often subjected to a redox method. 2.

PCB circuit board factory wastewater treatment - Shenzhen ...
PCB circuit board factory wastewater treatment - Shenzhen ...

The cyanide-,containing wastewater, and the ,chromium,-,containing wastewater, in the circuit board are often subjected to a redox method, as described later. Chemical precipitation is the use of one or several chemicals to convert harmful substances into easily separated precipitates or precipitates.

METHOD OF TREATING STRONGLY ACID WASTEWATER CONTAINING ...
METHOD OF TREATING STRONGLY ACID WASTEWATER CONTAINING ...

The method of treating strongly ,acid wastewater containing, toxic substances of the present invention is suitable for the removal of fluorine, boron, copper, lead, arsenic, cadmium, hexavalent ,chromium,, manganese, selenium, etc. from strongly ,acid wastewater, discharged from glass factories, liquid-crystal factories, plating factories, semiconductor factories, iron-mining factories, nonferrous ...

Removal of Hexavalent Chromium-Contaminated Water and ...
Removal of Hexavalent Chromium-Contaminated Water and ...

20/11/2008, · Cr(VI) is a well-known highly toxic metal, considered a priority pollutant. Industrial sources of Cr(VI) include leather tanning, cooling tower blowdown, plating, electroplating, anodizing baths, rinse waters, etc. This article includes a survey of removal techniques for Cr(VI)-contaminated aqueous solutions. A particular focus is given to adsorption, membrane filtration, ion exchange, and ...

Textile Dyeing Wastewater Treatment - IntechOpen
Textile Dyeing Wastewater Treatment - IntechOpen

Wool ,Acid, dyes Silk Direct dyes,,Acid, dyes ... Pre-,treatment wastewater, accounts for about 45% of the ... Cylinder engraving makes the ,wastewater contai ning, hexavalent ,chromium,. However, this technology has not been used. Another possible source is the use of potassium dichroma te

Treatment of oilfield wastewater by combined process of ...
Treatment of oilfield wastewater by combined process of ...

Iron, and carbon were added to the ,wastewater,, and the conditions were: ,iron,-carbon dosage, 50 mg/L; ,iron,-carbon mass ratio, 2:3; reaction time, 60 min. The solution gradually turned into black with a large amount of SS. (3) The micro-electrolysis solid was filtered, and in …

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