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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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Fluoride Removal - Water and Wastewater Information
Fluoride Removal - Water and Wastewater Information

Pilot-scale ,fluoride,-,containing wastewater treatment, by the ballasted flocculation process A pilot-scale ballasted flocculation system was used to remove ,fluoride, from one type of industrial ,wastewater,.

Fluoride Removal (Water and Wastewater) Articles
Fluoride Removal (Water and Wastewater) Articles

Pilot-scale ,fluoride,-,containing wastewater treatment, by the ballasted flocculation process A pilot-scale ballasted flocculation system was used to remove ,fluoride, from one type of industrial ,wastewater,.

Acid Fluoride-containing Wastewater Treatment Project in ...
Acid Fluoride-containing Wastewater Treatment Project in ...

The reconstruction project of ,acid fluoride,-,containing wastewater treatment, in rare earths refinery was introduced. The ,wastewater, was characterized by complex composition, strong acidity, and high content of ,fluoride, with contents of many kinds of heavy metal ion. In the pretreatment process, natural limestone was used for neutralization and precipitation, and then the lime cream and PAM were ...

Fluoride Removal (Water and Wastewater) Articles
Fluoride Removal (Water and Wastewater) Articles

Pilot-scale ,fluoride,-,containing wastewater treatment, by the ballasted flocculation process A pilot-scale ballasted flocculation system was used to remove ,fluoride, from one type of industrial ,wastewater,.

Acid Fluoride-containing Wastewater Treatment Project in ...
Acid Fluoride-containing Wastewater Treatment Project in ...

The reconstruction project of ,acid fluoride,-,containing wastewater treatment, in rare earths refinery was introduced. The ,wastewater, was characterized by complex composition, strong acidity, and high content of ,fluoride, with contents of many kinds of heavy metal ion. In the pretreatment process, natural limestone was used for neutralization and precipitation, and then the lime cream and PAM were ...

Method of fluoride-containing wastewater treatment ...
Method of fluoride-containing wastewater treatment ...

A method of ,fluoride,-,containing wastewater treatment,, comprising: performing a primary fluoric ion concentration detection process upon ,wastewater,, the primary fluoric ion concentration detection process comprising: providing a buffer solution having a stable pH value; adding a fixed amount of the ,wastewater, into the buffer solution; detecting a fluoric ion concentration in the buffer solution ...

Electrochemical decomposition of fluorinated wetting ...
Electrochemical decomposition of fluorinated wetting ...

The hexchrome-,containing wastewater, has a pH between 1.0 and 1.2 and, in that acidic solution, ,fluoride, is not stable. The pKs-value of HF is 3.1 so that the HF/F − equilibrium is shifted >99% (pH = pKs + lg (F − /HF) to the HF side which volatilizes from the solution together with the produced hydrogen gas.

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

Residual ,fluoride, concentration of lower than 15 mg ∕ L, the effluent standard, was found when molar ratio of calcium to ,fluoride,, [Ca 2 + ∕ F −], was 0.5 and pH ranged from 6.5 to 8.5. The fine precipitates of Ca F 2 were further flocculated by polyaluminum chloride (PAC) and anionic polyelectrolyte, polyacrylic ,acid, (PAA) with different molecular weight, to facilitate better solid ...

Technology to Remove Fluorides from Potable Water and ...
Technology to Remove Fluorides from Potable Water and ...

The ,treatment, of water ,containing, Fluorides, ... of precipitated Aluminium Oxide and re-dissolution of a complex Aluminium salt at pH value < 1, can be used for the ,Fluoride, removal in water and ,wastewater,, Patented, ... The product is strong acidic and the dosing pump must be ,acid, proof. The dosing capacity is in the range of 0 - 20 Kg /hour ...

Technology to Remove Fluorides from Potable Water and ...
Technology to Remove Fluorides from Potable Water and ...

The ,treatment, of water ,containing, Fluorides, ... of precipitated Aluminium Oxide and re-dissolution of a complex Aluminium salt at pH value < 1, can be used for the ,Fluoride, removal in water and ,wastewater,, Patented, ... The product is strong acidic and the dosing pump must be ,acid, proof. The dosing capacity is in the range of 0 - 20 Kg /hour ...

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 (Green): Its function is to prevent bridging during wave soldering, improve soldering quality and save solder. It is also a permanent protective layer for printed boards that protects against moisture, corrosion, mildew and mechanical abrasion.

Treatment of Semiconductor Wastewater by Dissolved Air ...
Treatment of Semiconductor Wastewater by Dissolved Air ...

Treatment, of ,fluoride,-,containing wastewater, from the semiconductor industry by dissolved air flotation was investigated. Calcium chloride was added to the ,wastewater, to form calcium ,fluoride, precipitate (CaF 2), which was then removed from the aqueous solution by flotation. When the molar ratio, [Ca 2 +] / [F-], was equal to 0.5, residual ,fluoride, concentration was lower than 15 mg/L.

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

Water tinged with sulfuric ,acid, leached other impurities from the coal, producing an acidic runoff contaminated with heavy metals. The desire to eliminate all types of basins and ponds has prompted industry to use more refined ,treatment, systems. Acidic streams ,containing, iron, aluminum, and sulfate are treated for removal of these contaminants.

The effectiveness of calcium hydroxide and sodium ...
The effectiveness of calcium hydroxide and sodium ...

for reducing ,fluoride, in hazardous ,wastewater, Jenny Anna Margaretha, Candra Irawan, Poppy Sri Lestari, Azkiyah Rahma and Erizal Tanjung Abstract The use of coagulant in Hazardous ,wastewater treatment containing Fluoride, can decrease the pH ,of waste water,, so calcium hydroxide and sodium hydroxide compound has been added in the process which

The effectiveness of calcium hydroxide and sodium ...
The effectiveness of calcium hydroxide and sodium ...

for reducing ,fluoride, in hazardous ,wastewater, Jenny Anna Margaretha, Candra Irawan, Poppy Sri Lestari, Azkiyah Rahma and Erizal Tanjung Abstract The use of coagulant in Hazardous ,wastewater treatment containing Fluoride, can decrease the pH ,of waste water,, so calcium hydroxide and sodium hydroxide compound has been added in the process which

Cleaning based on hydrofluoric acid - Vecom Group
Cleaning based on hydrofluoric acid - Vecom Group

Compared to any other pre-commission cleaning, the ,wastewater treatment, of HF ,containing wastewater, is very easy. The addition of calcium hydroxide (Ca(OH)2), or lime, causes the ,fluoride, to precipitate as insoluble calcium ,fluoride,, and iron to precipitate as iron hydroxide, which can …

The effectiveness of calcium hydroxide and sodium ...
The effectiveness of calcium hydroxide and sodium ...

for reducing ,fluoride, in hazardous ,wastewater, Jenny Anna Margaretha, Candra Irawan, Poppy Sri Lestari, Azkiyah Rahma and Erizal Tanjung Abstract The use of coagulant in Hazardous ,wastewater treatment containing Fluoride, can decrease the pH ,of waste water,, so calcium hydroxide and sodium hydroxide compound has been added in the process which

Cleaning based on hydrofluoric acid - Vecom Group
Cleaning based on hydrofluoric acid - Vecom Group

Compared to any other pre-commission cleaning, the ,wastewater treatment, of HF ,containing wastewater, is very easy. The addition of calcium hydroxide (Ca(OH)2), or lime, causes the ,fluoride, to precipitate as insoluble calcium ,fluoride,, and iron to precipitate as iron hydroxide, which can …

ACID FLUORIDE-CONTAINING WASTEWATER TREATMENT …
ACID FLUORIDE-CONTAINING WASTEWATER TREATMENT …

The ,treatment, techics and primary dispose of ,acid, F-,containing wastewater, in semiconductor factory with adjustment Tank,step reaction tank,coagulation tank,settling tank,bacteria filter tank was introduced in this paper. The concerntration of F in semiconductor factory usually was high and the p H was about 1 ~ 3. The water indicatored that the effluent fully could meet the requirements of ...

ACID FLUORIDE-CONTAINING WASTEWATER TREATMENT …
ACID FLUORIDE-CONTAINING WASTEWATER TREATMENT …

The ,treatment, techics and primary dispose of ,acid, F-,containing wastewater, in semiconductor factory with adjustment Tank,step reaction tank,coagulation tank,settling tank,bacteria filter tank was introduced in this paper. The concerntration of F in semiconductor factory usually was high and the p H was about 1 ~ 3. The water indicatored that the effluent fully could meet the requirements of ...

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