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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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drinking water treatment system
Treatment Technologies for Organic Wastewater | IntechOpen
Treatment Technologies for Organic Wastewater | IntechOpen

17/11/2011, · Sugar refinery ,wastewater containing, high organic load can be used as carbon sources for hydrogen production by microorganisms. As reported pretreated sugar refinery ,wastewater, was used for the production of hydrogen by Rhodobacter sphaeroides O.U.001. Hydrogen was produced at a rate of 0.001 L hydrogen/h/L culture in 20% dilution of the ...

Biogenic sulfides for sequestration of Cr (VI) COD and ...
Biogenic sulfides for sequestration of Cr (VI) COD and ...

toxic and carcinogenic Cr (VI) from synthetic solution. In order to treat Cr (VI) containing wastewater effectively, SRB culture was adapted to 50mg/L Cr (VI) and maintained through repeated sub-culturing to enhance the growth and activity of SRB. Batch biosorption

(PDF) Photocatalytic treatment of industrial wastewater ...
(PDF) Photocatalytic treatment of industrial wastewater ...

The additional advantage is coming from the sensitivity of the ,Cr,(VI) photo reduction to the surface catalytic effects or to the presence of an additional electron donor and acceptors; then, a synergistic effect was observed in two-or multi-component systems. 4,6 The nature of the carboxylic ,acid, used as the sacrificial agent seems to play a very important role in the photo reduction of ,Cr,(VI). Citric ,acid, …

Chromium sulfate | Cr2(SO4)3 - PubChem
Chromium sulfate | Cr2(SO4)3 - PubChem

The acute and subacute toxicities of several ,Cr,(III) and ,Cr,(VI) compounds (chromium(3+) chloride, chromium(3+) nitrate, chromium(3+) sulfate, chromium trioxide, potassium dichromate) were determined in NZC and (CxO) mice injected ip.The distal median lethal doses (> 10 days after treatment) averaged (17.9 + or - 1.8) X 10(-6) g chromium/g body wt regardless of the oxidation state of the ,Cr, ...

US5139679A - Treatment of wastewater containing citric ...
US5139679A - Treatment of wastewater containing citric ...

Process for treating ,wastewater containing, citric ,acid, and triethanolaminend heavy metals by subjecting the ,wastewater, to treatment with hydrogen peroxide and ultraviolet light (UV) and in the presence of ferrous ion as catalyst, to substantially decompose the citric ,acid, and the triethanolamine. ,Wastewater, generated from ship bilge cleaning and ,containing, up to 10% citric ,acid, or up to 5% triethanolamine, or …

(PDF) Photocatalytic treatment of industrial wastewater ...
(PDF) Photocatalytic treatment of industrial wastewater ...

The additional advantage is coming from the sensitivity of the ,Cr,(VI) photo reduction to the surface catalytic effects or to the presence of an additional electron donor and acceptors; then, a synergistic effect was observed in two-or multi-component systems. 4,6 The nature of the carboxylic ,acid, used as the sacrificial agent seems to play a very important role in the photo reduction of ,Cr,(VI).

Heavy Metals Removal Industrial Wastewater Solutions
Heavy Metals Removal Industrial Wastewater Solutions

Heavy Metals ,Wastewater, Treatment System (Chrome Removal) Chromium is present in the wastewaters of a number of industries, including: stainless steel manufacturing, protective coatings on metal, magnetic tapes, chrome plating, tanneries, textile dyes production, pigments and paint production, production of cement, paper, rubber, etc. Chromium is typically precipitated in two steps: reduction and …

Application of the electrocoagulation technique for ...
Application of the electrocoagulation technique for ...

metal ion depletion was attained with a current density of 98 A/m2, an initial ,wastewater, pH of 5 and a 30 min elec-trolysis time. Under these conditions, greater than 99% of Cu, ,Cr, and Zn was removed, whilst the outlet ,wastewater, contained Cu, ,Cr,, Pb and Zn at less than 0.02, 0.01, 0.07 and 0.05 mg/l, respectively.

US5139679A - Treatment of wastewater containing citric ...
US5139679A - Treatment of wastewater containing citric ...

Process for treating wastewater containing citric acid and triethanolaminend heavy metals by subjecting the wastewater to treatment with hydrogen peroxide and ultraviolet light (UV) and in the...

Oil and Gas Production Wastewater: Soil Contamination and ...
Oil and Gas Production Wastewater: Soil Contamination and ...

During oil and natural ,gas production,, so-called “produced water” comprises the largest byproduct stream. In addition, many oil and gas operations are augmented via injection of hydraulic fracturing (HF) fluids into the formation. Both produced water and HF fluids may contain hundreds of individual chemicals, some known to be detrimental to public health and the environment.

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

In this study, we investigated a two-step method to eliminate ,Cr,(VI) from ,wastewater,; in detail, the first step included the reduction of ,Cr,(VI) to ,Cr,(III) in the presence of oxalic ,acid,, followed by the adsorption of ,Cr,(III) onto MFA. At first, the optimal concentration of oxalic ,acid, was measured.

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

The aim of this study was to apply co-treatment of industrial ,wastewater containing, citric ,acid, and toxic heavy metals in single and binary systems using photocatalysis process. The hydrothermal method was used to synthesise dandelion-like TiO2 structures.

AN INTEGRATED APPROACH TO ASSESS THE …
AN INTEGRATED APPROACH TO ASSESS THE …

A composite sampling procedure of the ,wastewater, was performed during a daily working cycle of the tanneries. The composite sample was characterized for 19 chemical parameters. Five of these parameters were total ,Cr,, ,Cr, (VI), Zn, Cu and Al, which were determined in …

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

Chromium mainly exists in wastewater by Cr (III) and Cr (VI). Cr (VI) is easy to accumulate in organisms and water because of its solubility, strong oxidation, toxicity and other characteristics [4]. Chromium- containing wastewater treatment is particularly important and must be treated before discharged.

Decomplexation of Electroplating Wastewater in a Higee ...
Decomplexation of Electroplating Wastewater in a Higee ...

condition of pH=12.0, we could obtain that the concentration of Cu2+, Cr3+ and Ni2+ are much less than 10-11 mol/L. On this condition, Cu, ,Cr, and Ni ions would react with OH-and convert into precipitation completely. The residual concentration of Cu, ,Cr, and Ni ions in pretreatment samples (pH=12) could be ignored comparing to metal complexes. 20 k 1 2.2 10

Heavy Metals Removal Industrial Wastewater Solutions
Heavy Metals Removal Industrial Wastewater Solutions

Heavy Metals ,Wastewater, Treatment System (Chrome Removal) Chromium is present in the wastewaters of a number of industries, including: stainless steel manufacturing, protective coatings on metal, magnetic tapes, chrome plating, tanneries, textile dyes production, pigments and paint production, production of cement, paper, rubber, etc. Chromium is typically precipitated in two steps: reduction and …

Ethylenediaminetetraacetic acid - Wikipedia
Ethylenediaminetetraacetic acid - Wikipedia

Ethylenediaminetetraacetic acid, (EDTA) is an aminopolycarboxylic ,acid, with the formula [CH 2 N(CH 2 CO 2 H) 2] 2.This white, water-soluble solid is widely used to bind to iron and calcium ions. It binds these ions as a hexadentate ("six-toothed") chelating agent.EDTA is produced as several salts, notably disodium EDTA, sodium calcium edetate, and tetrasodium EDTA.

Water | Free Full-Text | Removal Mechanism and Effective ...
Water | Free Full-Text | Removal Mechanism and Effective ...

This study aims to clarify the removal mechanism and to calculate the effective current of electrocoagulation (i.e., EC) for treating ,wastewater containing, Ni(II), Cu(II), and ,Cr,(VI). The adsorption behavior of various heavy metals onto Al(OH)3 coagulant generated by the EC process was investigated and the estimating method of the corresponding current was established.

(PDF) Research on Treating Acid Wastewater Containing ...
(PDF) Research on Treating Acid Wastewater Containing ...

The SRB still survived after treating wastewater containing Cr(VI), which could regenerate biological iron sulfide composites by using Fe 3+,, sulphur, as electron acceptor.

New trends in removing heavy metals from industrial wastewater
New trends in removing heavy metals from industrial wastewater

1/10/2011, · 2.2. Industrial ,wastewater, sources. Industrial ,wastewater, streams ,containing, heavy metals are produced from different industries. Electroplating and metal surface treatment processes generate significant quantities of wastewaters ,containing, heavy metals (such as cadmium, zinc, lead, chromium, nickel, copper, vanadium, platinum, silver, and titanium) from a variety of applications.

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