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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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extra deep well drilling waste liquid harmless disposal technology inc.
Treating Metal Finishing Wastewater
Treating Metal Finishing Wastewater

toxicity to human and other biological life. Heavy metals typically present in metal finishing ,wastewater, are cadmium, chromium, copper, lead, ,nickel,, silver, tin, and zinc. Table 1 shows the EPA best practical control technology, BPT, limits for metal finishing effluent.

Treatment of wastewater containing copper zinc nickel ...
Treatment of wastewater containing copper zinc nickel ...

Fixed bed tests were conducted to investigate the efficiency of Duolite ES‐467 for the selective removal of copper ions from multi‐metal solutions. Breakthrough curves were obtained using Duolite ES‐467 for solutions ,containing, copper, ,nickel, and copper, zinc, ,nickel, and cobalt. Elution studies were also carried out using sulfuric ,acid,.

Defluoridation by highly efficient calcium hydroxide ...
Defluoridation by highly efficient calcium hydroxide ...

20/1/2019, · The Table 10 shows that 91.7% of fluoride can be removed from industrial wastewater for initial fluoride concentration of, 73 mg/L, using CHN dose 2 g/L. The fluoride removal from acidic electroplating industrial wastewater (91.7% removal) is shown better performance compared to basic electroplating industrial wastewater (70.3% removal).

(PDF) Treatment of high fluoride concentration water by ...
(PDF) Treatment of high fluoride concentration water by ...

Although the theoretical solubility of CaF 2 is 17 mg/L at 25 1C in water (Butler, 1964;Toyoda and Taira, 2000), CaF 2 precipitation can only reduce the ,fluoride concentration, to 10-20 mg/L in practice (Reardon and Wang, 2000). Depending on the discharge standards (p10 mg/L) for ,industrial wastewater,, a subsequent step may be necessary.

Study on Treatment of acidic and highly concentrated ...
Study on Treatment of acidic and highly concentrated ...

In Heilongjiang province, a graphite factory producing, high-purity, graphite generates, acidic waste, water with a high concentration of fluorine. In this paper, the effect of removals on the concentration of fluoride with the combined treatment of calcium oxide and calcium chloride were discussed with regard to …

Fluoride contamination in estuary water villages located ...
Fluoride contamination in estuary water villages located ...

Presence of ,high concentration, of ,fluoride, in drinking water causes dental and skeletal fluorosis in humans in ... hydrogen ,fluoride, (HF) in an ,acidic, stomach and out of this upto 40 % is absorbed by stomach or intestine [3]. ... ,fluoride, chemicals [25]. The ,wastewater, from such industries contains ,fluoride, ranging from several hundred to

Fluoride Reduction / HF - Industrial Waste Treatment
Fluoride Reduction / HF - Industrial Waste Treatment

A white paper by, Wastech, Controls & Engineering, Inc., HF,, or, Hydrofluoric Acid,, is a high-volume chemical that is extremely corrosive. It is miscible with water with the release of heat and an acrid, irritating odor, forming a clear, colorless liquid., HF, is a significant health hazard as a …

Fluoride Reduction / HF - Industrial Waste Treatment
Fluoride Reduction / HF - Industrial Waste Treatment

A white paper by Wastech Controls & Engineering, Inc. HF, or Hydrofluoric Acid, is a high-volume chemical that is extremely corrosive. It is miscible with water with the release of heat and an acrid, irritating odor, forming a clear, colorless liquid. HF is a significant health hazard as a liquid, even in diluted quantities.

Electrowinning Nickel: The Moody Metal
Electrowinning Nickel: The Moody Metal

Conventional ,Nickel electrowinning, cells overcome this by separating the anodic and cathodic compartments of the electrocell using a complex diaphragm that prevents the ,acid, that is generated at the anode from concurrently re-dissolving ,Nickel, that is plated at the cathode.

Precipitation treatment of effluent acidic wastewater from ...
Precipitation treatment of effluent acidic wastewater from ...

The results showed that the removal percentage of fluoride was, 80.6%, with an effluent concentration of, 9.7 mg/L., the author did not recommend this technique to be employed to treat waste water for domestic purpose, since it cannot bring fluoride within permissible limit (1.5 mg/L) and also increases the pH of treated water.Another technique was used for removing fluoride ion from an aqueous solution [12].

Behavior of Copper Nickel Cadmium and Mercury Ions in ...
Behavior of Copper Nickel Cadmium and Mercury Ions in ...

potentials, like lead and ,nickel,[5]. N.Touach. structured a cathode based on MnO 2 /CNT/PTFE to remove heavy metals(Cu, Zn, Cd, Sb, Pb, Mn and Fe) in MFCs [8]. Recovery of copper from ,wastewater containing, ammonia-copper (Ⅱ) complexes via the cathodic reduction of [Cu(NH 3) 4] 2+

Fluoride contamination in estuary water villages located ...
Fluoride contamination in estuary water villages located ...

Presence of ,high concentration, of ,fluoride, in drinking water causes dental and skeletal fluorosis in humans in ... hydrogen ,fluoride, (HF) in an acidic stomach and out of this upto 40 % is absorbed by stomach or intestine [3]. ... ,fluoride, chemicals [25]. The ,wastewater, from such industries contains ,fluoride, ranging from several hundred to

(PDF) Treatment of high fluoride concentration water by ...
(PDF) Treatment of high fluoride concentration water by ...

Although the theoretical solubility of CaF 2 is 17 mg/L at 25 1C in water (Butler, 1964;Toyoda and Taira, 2000), CaF 2 precipitation can only reduce the ,fluoride concentration, to 10-20 mg/L in practice (Reardon and Wang, 2000). Depending on the discharge standards (p10 mg/L) for ,industrial wastewater,, a subsequent step may be necessary.

Fluoride Removal from Aluminium Finishing Wastewater by ...
Fluoride Removal from Aluminium Finishing Wastewater by ...

Disposal of industrial wastewaters containing excess concentration of fluoride to surface and ground waters can cause several health hazards. Effluents containing fluoride need treatment to reduce their concentration to disposable values before being discharged into public sewage.

Removal of Arsenic from Strongly Acidic Wastewater Using ...
Removal of Arsenic from Strongly Acidic Wastewater Using ...

Strongly acidic wastewater (H 2 SO 4) with a high arsenic concentration is produced by many industries. The removal of arsenic by traditional sulfide (e.g., Na 2 S, FeS) from strongly acidic wastewater introduces cations (Na + and Fe 2+ ) to the solution, which may prevent the recycle of acid.

Fluoride Removal from Water by various techniques : Review
Fluoride Removal from Water by various techniques : Review

defluoridation of industrial wastewater observed that the rejection of fluoride ion was higher thanregularly98%, considering that the RO membrane was completely recovered after every arrangement of analyses [15]. Berhanu Assefa et al. concentrated the fluoride retention of RO membranes of Ethiopian Rift Region were in the

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