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Removal of calcium and magnesium from wastewater under acidic condition

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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Removal of calcium and magnesium from wastewater under acidic condition
Treatment of wastewater - Soane Energy LLC
Treatment of wastewater - Soane Energy LLC

A method of removing contaminants from frac flowback water or oilfield produced water, wherein the contaminants comprise dissolved iron, suspended solids, and oil, and further wherein the dissolved iron comprises ferrous iron, said method comprising the steps of: contacting the water with an oxidizing agent wherein the oxidizing agent oxidizes the ferrous iron to form precipitated ferric iron, and …

water treatment - coagulation-flocculation typical ...
water treatment - coagulation-flocculation typical ...

crystallised ,iron, sulphate Fe 2 (SO 4) 3 in ,powder, form, 9H 2 O and even chlorinated copperas; ferrous sulphate FeSO 4 in ,powder, form, 7H 2 O; however, this reagent has to be oxidised (Fe 2+ Fe 3+ ), often by Cℓ 2 , before use at a pH close to neutral; furthermore, FeSO 4 , an industrial by-product, is rarely of the grade required for drinking water or even industrial water processing.

(PDF) Treatment of Dairy Processing Wastewaters | chindia ...
(PDF) Treatment of Dairy Processing Wastewaters | chindia ...

Final wastewater polishing after biological treatment usually involves chemical treatment of the wastewater with calcium, iron, or aluminum salts to remove dissolved nutrients such as …

Principle and Process of Heavy Metal Removal from Sewage ...
Principle and Process of Heavy Metal Removal from Sewage ...

This study shows that heavy metals in ,sewage sludge, can be removed easily by ,treating, a sludge filter cake with phosphoric ,acid, containing hydrogen peroxide for 1 h at room temperature. Phosphoric ,acid, of 8% concentration with hydrogen peroxide showed good removal rates of heavy metals comparable to those by 1 N hydrochloric ,acid,.

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