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Regulation of acid wastewater from dry desulfurization

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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Regulation of acid wastewater from dry desulfurization
Wastewater: Industrial Metal Finishing
Wastewater: Industrial Metal Finishing

discharge. There are four main reasons to control the pH in ,wastewater,: 1. Protect human health and the environment; fish and other living organisms in rivers and streams. 2. Protect the ,wastewater, infrastructure from corrosion, especially from ,acidic wastewater,. 3.

Wastewater Treatment for the Industrial Metal Finishing ...
Wastewater Treatment for the Industrial Metal Finishing ...

Neutralization of ,wastewater, that is highly ,acidic, (low pH) or highly basic (high pH) is required for discharge to municipal sewer systems or to rivers and streams. The most common allowable pH range for discharge is generally 6 to 9 standard units (S.U.) but can be 5.0 to …

REMOVAL OF HEXAVALENT CHROMIUM FROM ELECTROPLATING ...
REMOVAL OF HEXAVALENT CHROMIUM FROM ELECTROPLATING ...

in ,alkaline, to neutral medium, while they are oxidized to Fe3+ ions according to reaction (4): CrO 4 2-+ 3Fe2+ + 4H 2O + 4OH-→ 3Fe(OH) 3 + Cr(OH) 3 (4) Both, Fe3+ and Cr3+ ions combine with the generated OH- ions and precipitate as insoluble hydroxides. The Fe2+ ions can also reduce Cr 2O 7 2-ions in ,acidic, medium according to reaction (1), as already stated.

Workplace Safety and Health Guidelines
Workplace Safety and Health Guidelines

Electroplating, waste has to be chemically reduced or oxidised prior to discharge ... Neutralisation of an ,acidic or alkaline, waste is the addition of acids or bases ... ,wastewater,. Neutralisation of an ,acidic, waste stream can cause precipitation of heavy metals.

Treatment of Electroplating Waste -- Student Project
Treatment of Electroplating Waste -- Student Project

2000. A. Anusha: Some good books available on the ,treatment of electroplating waste, include: "Operation and Maintenance of Surface ,Finishing Wastewater, Treatment Systems" [affil. link to book on Amazon] and Water and Waste Control For the Plating Shop".For a much briefer treatment of the subject, there is coverage in the Metal ,Finishing, Guidebook, the "Products ,Finishing," Directory, and the ...

Improving the Electroplating Process Using pH Control ...
Improving the Electroplating Process Using pH Control ...

13/6/2017, · ,Electroplating Wastewater, Treatment. ,Electroplating wastewater, must be treated for toxic chemical removal before discharge to municipal sewers. Just as pH needs to be controlled in the ,electroplating, process to keep metal ions in solution, pH can also be used in ,wastewater, treatment to precipitate ions for removal via sedimentation and filtration.

Advanced Technologies in Electroplating and Effluent ...
Advanced Technologies in Electroplating and Effluent ...

Electroplating,, uses toxic chemicals and generates ... Aerated lagoons, ,Wastewater, stabilization ponds, Trickling filters, Anaerobic treatment ... • Spent ,alkaline, and ,acidic, etchants and cleaners • Spent strippers • Solvent degreasers • Waste and process bath treatment sludges

Workplace Safety and Health Guidelines
Workplace Safety and Health Guidelines

Electroplating, waste has to be chemically reduced or oxidised prior to discharge ... Neutralisation of an ,acidic or alkaline, waste is the addition of acids or bases ... ,wastewater,. Neutralisation of an ,acidic, waste stream can cause precipitation of heavy metals.

Wastewater treatment: a case study of electronics ...
Wastewater treatment: a case study of electronics ...

20/9/2018, · Among the various proposed methods of cyanide removal from ,electroplating wastewater, (Pulkka et al. 2014; Xu et al. 2015), ,alkaline, chlorination is considered as the most favorable option. ,Alkaline, chlorination has been used ever since 1889 when cyanide leaching was commercially established and became the most commonly applied technology for cyanide removal.

SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …
SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …

are toxic but valuable. Electroplating wastewater is variable in character and alkaline in nature. It gives rise to obnoxious smell. The color imparts visible pollution, which persist for long distance in river stream decreases recreation capacity of stream impairing self-purification, disturbed penetration of sun

Treatment of Electroplating Waste -- Student Project
Treatment of Electroplating Waste -- Student Project

2000. A. Anusha: Some good books available on the ,treatment of electroplating waste, include: "Operation and Maintenance of Surface ,Finishing Wastewater, Treatment Systems" [affil. link to book on Amazon] and Water and Waste Control For the Plating Shop".For a much briefer treatment of the subject, there is coverage in the Metal ,Finishing, Guidebook, the "Products ,Finishing," Directory, and the ...

Wastewater treatment: a case study of electronics ...
Wastewater treatment: a case study of electronics ...

20/9/2018, · Among the various proposed methods of cyanide removal from ,electroplating wastewater, (Pulkka et al. 2014; Xu et al. 2015), ,alkaline, chlorination is considered as the most favorable option. ,Alkaline, chlorination has been used ever since 1889 when cyanide leaching was commercially established and became the most commonly applied technology for cyanide removal.

Improving the Electroplating Process Using pH Control ...
Improving the Electroplating Process Using pH Control ...

13/6/2017, · ,Electroplating Wastewater, Treatment. ,Electroplating wastewater, must be treated for toxic chemical removal before discharge to municipal sewers. Just as pH needs to be controlled in the ,electroplating, process to keep metal ions in solution, pH can also be used in ,wastewater, treatment to precipitate ions for removal via sedimentation and filtration.

Electroplating - IFC
Electroplating - IFC

lutions are acid ,or alkaline, and may contain complexing agents such as cyanides. Waste Characteristics Any or all of the substances used in ,electroplat-ing, (such as ,acidic, solutions, toxic metals, sol-vents, and cyanides) can be found in the ,wastewater,, either via rinsing of the product or from spillage and dumping of process baths. The

Removal of copper and COD from electroplating effluents by ...
Removal of copper and COD from electroplating effluents by ...

electroplating wastewater, was effectively reduced from its initial value of 65 mg L-1 to less than the permissible limit ... In ,acidic, environment (pH<2) the removal is low, ... (at ,alkaline, pH). It is well known that these species

Substitution of Zinc cyanide for electroplating
Substitution of Zinc cyanide for electroplating

The final selection between acidic or alkaline zinc plating is mostly dependant on characteristics of the materials to be plated. Concrete costs of necessary technical equipment (electroplating baths, pipes, etc.) are a subject to change and depend on the scale of …

SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …
SOLUTION FOR WASTEWATER PROBLEM RELATED TO ELECTROPLATING …

Electroplating wastewater, is variable in character and ,alkaline, in nature. It gives rise to obnoxious smell. The color imparts visible pollution, which persist for long distance in river stream decreases recreation capacity of stream impairing self-purification, disturbed penetration of sun rays which in turn retard photosynthesis activity.

Advanced Technologies in Electroplating and Effluent ...
Advanced Technologies in Electroplating and Effluent ...

Electroplating,, uses toxic chemicals and generates ... Aerated lagoons, ,Wastewater, stabilization ponds, Trickling filters, Anaerobic treatment ... • Spent ,alkaline, and ,acidic, etchants and cleaners • Spent strippers • Solvent degreasers • Waste and process bath treatment sludges

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