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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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Research on Treating Acid Wastewater Containing Heavy Metal
Research on Treating Acid Wastewater Containing Heavy Metal

chromium. wastewater need to be treated before discharged. U (VI) can [11]. A new reduction-regeneration circulation process for treating chromium-containing wastewater and reclaiming chromium was developed with the regeneration character of the composites which consisted of SRB and nanosized iron sulfide produced by SRB in 2009.

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.

Photocatalytic treatment of industrial wastewater ...
Photocatalytic treatment of industrial wastewater ...

Maximum ,treatment, efficiency of total ,chromium, reduction with increasing citric ,acid, concentration from 20 to 80 mg/l was reduced to 62%, 76.7%, 77.91%, and 100%, and with increasing H 2 O 2 concentration from 20 to 100 ml/l was reduced to 40.57%, 41.84%, 50.77%, 61.03%, and 100%, which is more efficient than the H 2 O 2 /UV process.

CHROMIUM REMOVAL FROM TANNERY WASTEWATER …
CHROMIUM REMOVAL FROM TANNERY WASTEWATER …

chromium removal efficiency was examined investigating various parameters: applied voltage, time, and current density. In thebatch experiment, 500 mL chromium-containing wastewater was used for electrocoagulation. Chromium content in the raw wastewater was 340.1 mg/L and after treatment at optimized conditions, chromium content was 6.9 mg/L.

Research on Treating Acid Wastewater Containing Heavy Metal
Research on Treating Acid Wastewater Containing Heavy Metal

chromium,. ,wastewater, need to be treated before discharged. U (VI) can [11]. A new reduction-regeneration circulation process for treating ,chromium,-,containing wastewater, and reclaiming ,chromium, was developed with the regeneration character of the composites which consisted of SRB and nanosized iron sulfide produced by SRB in 2009.

Heavy Metal Complexes Wastewater Treatment with Chelation ...
Heavy Metal Complexes Wastewater Treatment with Chelation ...

Abstract: In view of the existing technical problems about treatment of electroplating wastewater , the new technology of processing electroplating wastewater with organic heavy metal chelator-dithiocarbamates is developed. Using electroplating wastewater containing copper, nickel and chromium complexes with EDTA, ammonia and citric acid as an ...

Chromium Removal from Wastewater by Reverse Osmosis
Chromium Removal from Wastewater by Reverse Osmosis

wastewater treatment,. Key-Words: - ,chromium,, tanning, pollutant, membrane separation, reverse osmosis, ,wastewater treatment,, leather industry . 1 Introduction . Wide spectrum of physical-chemical and biological ,treatment, methods and their combination is commonly used for ,treatment, of various ,wastewater,.

CHROMIUM REMOVAL FROM TANNERY WASTEWATER …
CHROMIUM REMOVAL FROM TANNERY WASTEWATER …

chromium, removal efficiency was examined investigating various parameters: applied voltage, time, and current density. In thebatch experiment, 500 mL ,chromium,-,containing wastewater, was used for electrocoagulation. ,Chromium, content in the raw ,wastewater, was 340.1 mg/L and after ,treatment, at optimized conditions, ,chromium, content was 6.9 mg/L.

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.

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

Wastewater, from electroplating facilities and certain types of . chemical plants contains toxic forms of hexavalent ,chromium, such as chromate and dichromate. The hexavalent ,chromium, in this ,wastewater, must be reduced before the water can be discharged. This requires a two-step process: hexavalent ,chromium, (CR. 6) is reduced to trivalent ...

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

Wastewater, from electroplating facilities and certain types of . chemical plants contains toxic forms of hexavalent ,chromium, such as chromate and dichromate. The hexavalent ,chromium, in this ,wastewater, must be reduced before the water can be discharged. This requires a two-step process: hexavalent ,chromium, (CR. 6) is reduced to trivalent ...

(PDF) Removal Of Chromium From Electroplating Wastewater ...
(PDF) Removal Of Chromium From Electroplating Wastewater ...

The water remaining after separation of the precipitate contains less than 50 mg/lit chromium which is close to some reported results [10] The wastewater was treated with the limewater suspension at various ratios of CaO Removal Of Chromium From Electro-Plating Wastewater By Simple Chemical Treatment And Ion Exchange suspension to the wastewater ratios to reach the optimum amount of the lime …

Trevi Environmental Solutions - Chromium reduction
Trevi Environmental Solutions - Chromium reduction

The wastewater which contains hexavalent chromium is then subjected to a chromium reduction, which generates reduced chromium (Cr 3+) wastewater. The latter is further treated with the other wastewater streams in the coagulation-flocculation process.

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].

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.

Trevi Environmental Solutions - Chromium reduction
Trevi Environmental Solutions - Chromium reduction

The wastewater which contains hexavalent chromium is then subjected to a chromium reduction, which generates reduced chromium (Cr 3+) wastewater. The latter is further treated with the other wastewater streams in the coagulation-flocculation process. The source-separation of wastewater loaded with hexavalent chromium and other wastewaters reduces chemical costs and allows to build compact …

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.

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