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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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Flow chart of fracturing flowback fluid treatment
Comparative Study of Fluoride Removal from Synthetic ...
Comparative Study of Fluoride Removal from Synthetic ...

Comparative Study of, Fluoride Removal, from, Synthetic Wastewater, by using Bio-adsorbents S. R. Saranya and N. Anu . Abstract — Contamination, of fluoride, in, drinking water, results severe health hazard problem. Adsorption is the most effective and widely used method and is applicable for, the removal of fluoride, even at low concentrations.

Removal of fluoride from semiconductor wastewater by ...
Removal of fluoride from semiconductor wastewater by ...

1/3/2005, · Presently, the cheapest way to remove fluoride from semiconductor wastewater is to produce calcium fluoride (CaF 2) by adding lime or another calcium salt, such as CaCl 2., (1) Ca 2+ (aq) +2F − (aq) → CaF 2(s)., However, this process causes the problem of hardness of the effluent water.

Precipitation Removal of Fluoride from Semiconductor ...
Precipitation Removal of Fluoride from Semiconductor ...

1/4/2007, · ,Fluoride removal, by, precipitation, of, calcium fluoride, is the most common practice in, Taiwan, to treat fluoride-conta,ining wastewater, in semiconductor or optoelectronic industries. Due to very fine...

Optimization of electrocoagulation process for fluoride ...
Optimization of electrocoagulation process for fluoride ...

19/3/2019, · This study covers fluoride removal from wastewater of phosphoric acid plant using the simultaneous effect of chemical precipitation and electrocoagulation. A blending approach has been selected and the blend represents the combination of wastewaters viz. fluoride contaminated wastewater and gypsum plaster (GP) rich wastewater.

Precipitation Removal of Fluoride from Semiconductor ...
Precipitation Removal of Fluoride from Semiconductor ...

Abstract. Chemical precipitation method utilizing, calcium salts, has been extensively used to treat fluoride-containing wastewater from semiconductor manufacturers. The major objective of this study was to investigate coagulation-flocculation of calcium fluoride precipitates ( Ca F 2). Residual fluoride concentration of lower than 15 mg ∕ L, the ...

(PDF) A critical study on efficiency of different ...
(PDF) A critical study on efficiency of different ...

Fluoride removal, from water by a mechanochemically synthesized anion clay (meixnerite) and its calcinations product was studied at initial ,fluoride,: meixnerite molar ratios (FI:meix) of 0.1 to 2.0 the theoretical ,fluoride, uptake limit for meixnerite [66].Al-Ce hybrid adsorbent by co-precipitation method was prepared and used for ,fluoride removal, [67].

Removal of fluoride from wastewater by natural and ...
Removal of fluoride from wastewater by natural and ...

The presence of fluoride anions over 1.5 ppm in drinking water could be harmful [2-4]; therefore, the removal of fluoride ions from industrial wastewater is extremely important. In order to eliminate fluoride from aqueous solutions, various chemical and physical methods were developed [3-4].

Precipitation Removal of Fluoride from Semiconductor ...
Precipitation Removal of Fluoride from Semiconductor ...

Abstract. Chemical precipitation method utilizing calcium salts has been extensively used to treat fluoride-containing wastewater from semiconductor manufacturers. The major objective of this study was to investigate coagulation-flocculation of calcium fluoride precipitates ( Ca F 2). Residual fluoride concentration of lower than 15 mg ∕ L, the ...

Removal of fluoride from industrial wastewater by using ...
Removal of fluoride from industrial wastewater by using ...

The ,study, found out that the composite synergy between different materials, morphological and structural control, and the strengthening of their functional groups can effectively improve the ability of the adsorbents for removing ,fluoride,. This ,study, has prospected the direction of various adsorbents for removing ,fluoride, in ,wastewater,, which would serve as guiding significance for future research in the …

Electrochemical Removal of Fluoride Ions from Industrial ...
Electrochemical Removal of Fluoride Ions from Industrial ...

A continuous bipolar electrocoagulation flotation (ECF) process was developed by Hu et al. for the removal of fluoride from wastewater by calcium precipitation technique with the addition of ...

Journal of Chemical and Pharmaceutical Research 2014 6 ...
Journal of Chemical and Pharmaceutical Research 2014 6 ...

According to the Table 1, before fluoride removal, quality of fluoride wastewater was relatively clean, just mixed with acid or alkali, and was low concentration of COD and hardness. After adding lime, flocculant and other industrial agent, quality of wastewater was more complicated. COD concentration, conductivity and hardness was

Ground Water Contamination with Fluoride and Potential ...
Ground Water Contamination with Fluoride and Potential ...

1/6/2012, · ,Removal, of ,fluoride, from water has been researched on employing a number of materials among which are bauxite, gypsum, magnesite and their composite filters [2,46,47], Calcium chloride (C a C l 2) and Sodium dihydrogen phosphate (N a H 2 P O 4) as co-precipitation reagents in contact precipitation [33, 34], cow bone char in batch and fixed bed [7, 32], fish bone , activated carbon and …

REMOVAL OF FLUORIDE FROM WASTEWATER BY CALCINED …
REMOVAL OF FLUORIDE FROM WASTEWATER BY CALCINED …

Other researchers utilised calcite to remove fluoride ion from industrial wastewater containing HF [23, 24]. Gogoi and Dutta [25] revealed that the addition of phosphoric acid to, limestone, enhanced the removal of fluoride by increasing the removal capacity to 4.38 mg/g of, limestone., …

Selective separation of phosphate and fluoride from ...
Selective separation of phosphate and fluoride from ...

Selective separation of phosphate and fluoride from the semiconductor wastewater, containing 936 mg/L of fluoride, 118 mg/L of phosphate, 640 mg/L of sulfate, and 26.7 mg/L of ammonia, was studied. Chemical precipitation and flotation reactions were utilized in the two-stage treatment processes.

Optimization of electrocoagulation process for fluoride ...
Optimization of electrocoagulation process for fluoride ...

This study covers fluoride remo,val, from, wastewater, of phosphoric acid plant using the simultan,eous effect of chemical precipitation and electrocoagulation,. A blending approach has been selected and the blend represents the combination of wastewaters viz. fluoride contaminated wastewater and gypsum plaster (GP) rich wastewater. GP

Removal of fluoride from wastewater by natural and ...
Removal of fluoride from wastewater by natural and ...

The presence of fluoride anions, over 1.5 ppm, in drinking water could be harmful [2-4]; therefore, the removal of fluoride ions from industrial wastewater is extremely important. In order to eliminate fluoride from aqueous solutions, various chemical and physical methods were developed [3-4].

[PDF] Removal of Fluoride Ions from Electronic Industrial ...
[PDF] Removal of Fluoride Ions from Electronic Industrial ...

This study attempted to utilize ultrafine precipitated calcium carbonate for ,fluoride removal, from the ,wastewater, of electronics industries. An average particle size of the calcium carbonate was 0.96 μm, and pH of the aqueous slurry was 10 with 70% in mass. The suspension solution showed approximately 2 mL/hr of the sedimentation rate. The present calcium carbonate solution could be ...

[PDF] Removal of Fluoride Ions from Electronic Industrial ...
[PDF] Removal of Fluoride Ions from Electronic Industrial ...

This study attempted to utilize ultrafine precipitated calcium carbonate for fluoride removal from the wastewater of electronics industries. An average particle size of the calcium carbonate was 0.96 μm, and pH of the aqueous slurry was 10 with 70% in mass. The suspension solution showed approximately 2 mL/hr of the sedimentation rate.

Optimization of electrocoagulation process for fluoride ...
Optimization of electrocoagulation process for fluoride ...

19/3/2019, · A novel blending approach has been introduced for fluoride removal by means of, electrocoagulation., A blend was prepared by mixing synthetic phosphoric acid plant wastewater and gypsum plaster (GP) rich wastewater. This study explores defluoridation of wastewater using the simultaneous effect of chemical precipitation and, electrocoagulation,.

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