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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 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.

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.

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) 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.

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.

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.

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...

(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).

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.

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

(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, …

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 …

Wastewater containing Cr(VI) treatment using solar tubular ...
Wastewater containing Cr(VI) treatment using solar tubular ...

Thus, the, tubular reactor,, which was designed and built, was effective when applied to the treatment of real wastewater containing Cr(VI), using a photochemical reduction process. Furthermore, the use of a solar tubular reactor minimizes the electricity requirements, making it an …

Treatment of Cr(VI)-containing wastewaters with ...
Treatment of Cr(VI)-containing wastewaters with ...

28/5/2010, · In the filter press, a first experiment done by flushing 30 L of diluted wastewater containing 12 mg L, −1, of Cr(VI) showed that, in about 24 h, the metal was completely removed (data not shown); thus, a second experiment, done without changing the biomass but using a new stock of wastewater, containing 112 mg L, −1, of Cr(VI) and 11 mg L, −1, of Cr(III), was carried out.

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 …

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