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Acidic wastewater from pyrite acid production

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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Acidic wastewater from pyrite acid production
Sludge recycle and reuse in acid mine drainage treatment ...
Sludge recycle and reuse in acid mine drainage treatment ...

A process for neutralising ,acid mine, drainage waters in a large Pennsylvanian coal ,mine, operation is described. Lime slurry (hydrated lime for lower acidity and quicklime for higher acidity) at a concentration of 5% is added to maintain a ,pH, of 8.0 to 9.5.

Negative pH and Extremely Acidic Mine Waters from Iron ...
Negative pH and Extremely Acidic Mine Waters from Iron ...

Extremely acidic ,mine, waters ,with pH, values as low as −3.6, total dissolved metal concentrations as high as 200 g/L, and sulfate concentrations as high as 760 g/L, have been encountered underground in the Richmond ,Mine, at Iron Mountain, CA. These are the most acidic waters known. The ,pH, measurements were obtained by using the Pitzer method to define ,pH, for calibration of glass membrane ...

Mine wastewater treatment by highly calcareous and ...
Mine wastewater treatment by highly calcareous and ...

more efficient in neutralizing ,acid mine, water drainage, achieving ,pH,=7 within short ... This work is one of the few examining its usage in ,mine,-,wastewater, treatment, focusing on the comparison between high-Ca- & Si-ashes, generated in ... Hour ,pH 0.5, 4.95 10 3.55 24 3.48 25 3.45 48 3.20 72 3.17 96 3.07 .

Acidity And Alkalinity - Water Quality - Dr. Darrin Lew
Acidity And Alkalinity - Water Quality - Dr. Darrin Lew

10/4/2021, · Average initial conditions for alkalinity and ,pH, in the ,wastewater, were expected to be about ,0.5, meq/L and 6.0, respectively. In the preliminary design plan, four options for increasing the ,pH, were considered: 1. Raise the ,pH, by adding NaOH, a strong base. 2. Raise the ,pH, by adding calcium carbonate, CaCO3, in the form of limestone. 3.

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