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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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Wastewater Treatment of Tanneries Industry through Bio ...
Wastewater Treatment of Tanneries Industry through Bio ...

valuable way that is Fenton process. The ,principle, steps are as followings; adding Fe So 4 or Fe Cl 2, acidifying the ,sulfuric acid wastewater,, oxidation (H 2 O 2), neutralizing [Ca (OH) 2] CPH, and using Fenton method for separating soda with the effect of 90% [3]. Productions arising by chemical sludge during PH

Coatings | Free Full-Text | Current Progress on the ...
Coatings | Free Full-Text | Current Progress on the ...

Oxidation by ammonium persulfate and ,sulfuric acid, solution: weakly acidic : Zn 2+ removal : Treatment using Na 2 S: weakly acidic : Pb 2+ removal : Heat treatment in H 2 S: sulfur-based : Mercury (as HgCl 2) removal : Oxidization using nitric ,acid,, ammonium persulphate: weakly acidic: Cu 2+ removal : Oxidization using nitric ,acid,: weakly acidic: Cd 2+ removal

Coagulant Recovery from Water Treatment Residuals: A ...
Coagulant Recovery from Water Treatment Residuals: A ...

1/12/2014, · While acidification with ,sulfuric acid, is the universal means of coagulant resolubilization, there is a lack of consensus on the optimum operational pH. More metal coagulant can be solubilized at lower pH values but this effect has been reported to diminish below pH values of 1, at concentrations of approximately 2,500 mg/L Al (Saunders and Roeder, 1991 ).

Wastewater Treatment of Tanneries Industry through Bio ...
Wastewater Treatment of Tanneries Industry through Bio ...

valuable way that is Fenton process. The ,principle, steps are as followings; adding Fe So 4 or Fe Cl 2, acidifying the ,sulfuric acid wastewater,, oxidation (H 2 O 2), neutralizing [Ca (OH) 2] CPH, and using Fenton method for separating soda with the effect of 90% [3]. Productions arising by chemical sludge during PH

Advanced Preliminary and Primary Treatment Study Guide
Advanced Preliminary and Primary Treatment Study Guide

A. ,Sulfuric acid,: will cause severe burns if it comes in contact with the skin. ,Sulfuric acid, should be stored in a shatter proof container. The operator should wear a face shield and ,Advanced Preliminary and Primary Treatment Study, Guide - August 1991 Edition

Cooling Water Problems and Solutions
Cooling Water Problems and Solutions

The acid is fed by variable stroke pumps that are controlled either by automatically adjusting the pump stroke based on circulating water pH, or by automatically starting and stopping manual stroke adjustment metering pumps based on circulating water pH. Sulfuric acid is normally used at a concentration of 93 to 98 percent (66° Bé).

Design Manual Neutralization Of Acid Mine Drainage
Design Manual Neutralization Of Acid Mine Drainage

The pyrite oxidizes to form a weak solution of ,sulfuric acid,. As the solu- tion of ,sulfuric acid, passes over the varieties of rock strata surrounding the pyrite, it dissolves such metals as iron, aluminum, manganese, calcium, magnesium, sodium, and possibly some trace metals such as arsenic, selenium, beryllium, nickel, zinc, and others.

Extraction of Fulvic Acid from Lignite and ...
Extraction of Fulvic Acid from Lignite and ...

The effects of reaction time, oxidant concn., oxygen-coal ratio and microwave power on FA yield are detd. Sulfuric acid-acetone was applied to purify the primary FA products. The results indicate that the oxidant concn. is a sensitive factor affecting …

wastewater test quiz Flashcards - Cram.com
wastewater test quiz Flashcards - Cram.com

One of the main purposes of primary treatment is to allow the downstream biological treatment process to be down-sized ... due to the removal of TSS and CBOD5 from the influent wastewater. Typical removal efficiency for CBOD5 is about 25 to 30% of the influent wastewater.

Characteristics and Treatment of Wastewater from the ...
Characteristics and Treatment of Wastewater from the ...

One of the most significant differences between ,acid, neutralization and the WAO process is that the ,acid, components of spent sodas are removed but not destroyed, for example, phenols. In some cases, this entails the requirement of additional treatments for the acidification effluents, for example, gas ignition or methods for sulfur recovery.

Characteristics and Treatment of Wastewater from the ...
Characteristics and Treatment of Wastewater from the ...

One of the most significant differences between ,acid, neutralization and the WAO process is that the ,acid, components of spent sodas are removed but not destroyed, for example, phenols. In some cases, this entails the requirement of additional treatments for the acidification effluents, for example, gas ignition or methods for sulfur recovery.

Advanced Preliminary and Primary Treatment Study Guide
Advanced Preliminary and Primary Treatment Study Guide

A. ,Sulfuric acid,: will cause severe burns if it comes in contact with the skin. ,Sulfuric acid, should be stored in a shatter proof container. The operator should wear a face shield and ,Advanced Preliminary and Primary Treatment Study, Guide - August 1991 Edition

Complete Water Services | Wastewater Treatment for the ...
Complete Water Services | Wastewater Treatment for the ...

Wastewater with a high pH is generally neutralized with sulfuric acid (H 2 SO 4), hydrochloric acid (HCl), or carbon dioxide (CO 2). The most common chemicals used are H 2 SO 4 and NaOH. Neutralization can be accomplished by batch treatment or continuous flow processes.

Coagulant Recovery from Water Treatment Residuals: A ...
Coagulant Recovery from Water Treatment Residuals: A ...

1/12/2014, · While acidification with ,sulfuric acid, is the universal means of coagulant resolubilization, there is a lack of consensus on the optimum operational pH. More metal coagulant can be solubilized at lower pH values but this effect has been reported to diminish below pH values of 1, at concentrations of approximately 2,500 mg/L Al (Saunders and Roeder, 1991 ).

BIOCHEMICAL OXYGEN DEMAND - Wastewater Treatment …
BIOCHEMICAL OXYGEN DEMAND - Wastewater Treatment …

e. ,Acid, and alkali solutions, 1N, for neutralization of caustic or ,acid, waste samples. 1) ,Acid, Slowly while stirring, add 28 mL conc ,sulfuric acid, to distilled water. Dilute to 1 L. 2) Alkali Dissolve 40 g sodium hydroxide in distilled water. Dilute to 1 L. f. Sodium sulfite solution: Dissolve 1.575 g Na 2 SO 3 in 1000 mL distilled water.

BIOCHEMICAL OXYGEN DEMAND - Wastewater Treatment …
BIOCHEMICAL OXYGEN DEMAND - Wastewater Treatment …

e. ,Acid, and alkali solutions, 1N, for neutralization of caustic or ,acid, waste samples. 1) ,Acid, Slowly while stirring, add 28 mL conc ,sulfuric acid, to distilled water. Dilute to 1 L. 2) Alkali Dissolve 40 g sodium hydroxide in distilled water. Dilute to 1 L. f. Sodium sulfite solution: Dissolve 1.575 g Na 2 SO 3 in 1000 mL distilled water.

Complete Water Services | Wastewater Treatment for the ...
Complete Water Services | Wastewater Treatment for the ...

Wastewater with a high pH is generally neutralized with sulfuric acid (H 2 SO 4), hydrochloric acid (HCl), or carbon dioxide (CO 2). The most common chemicals used are H 2 SO 4 and NaOH. Neutralization can be accomplished by batch treatment or continuous flow processes.

Effluent Treatment Plant Design Operation And Analysis Of ...
Effluent Treatment Plant Design Operation And Analysis Of ...

The two acidscommonly used are hydrochloric ,acid, and ,sulfuric acid,. Wastewaters include acidic rinsewaters together with waste ,acid,. Although many plants operate ,acid, recovery plants,(particularly those using Hydrochloric ,acid,), where the mineral ,acid, is boiled away from theiron salts, there remains a large volume of highly ,acid, ferrous sulfate or ferrous chlorideto be …

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