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Acid wastewater from hydrometallurgy

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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Acid wastewater from hydrometallurgy
A Lower-cost Approach to Treating Low-volume Refinery ...
A Lower-cost Approach to Treating Low-volume Refinery ...

Acid springing is probably one of the oldest on-site treatment methods used in refineries to dispose of spent caustic. Acid springing works by adding a strong acid (e.g., sulfuric acid) to the spent caustic until the pH is around 3. At this low pH, the acid oil tends to dissociate from the aqueous phase to form a separate floating “oil” layer.

Sour Water Stripper Process | Yokogawa America
Sour Water Stripper Process | Yokogawa America

There are three distinct processing steps in the sour water stripping process: degasification, hydrogen (acid-gas) stripping and ammonia stripping. Figure 1 shows only one stripper column. During the degasification stage the sour water feed from the plant is cooled and fed to a degasser where dissolved hydrogen, methane and other light hydrocarbons are removed.

(PDF) Mixed acid recovery with the APU acid sorption ...
(PDF) Mixed acid recovery with the APU acid sorption ...

The waste from the acid sorption unit is a mildly acidic solution containing iron, chromium and nickel sulfate which can be neutraliz,ed, to reclaim the, metal values as hydroxides.

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

The acid mine drainage waste is characterized by red water. The simplest treatment is neutralization and clarification. The ideal, neutralization, first combines one of the reactants with previously precipitated solids. This blend is then mixed with the other reactant. This seeding provides the …

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