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Which enterprises discharge acid wastewater

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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Which enterprises discharge acid wastewater
Removing Heavy Metals From Wastewater
Removing Heavy Metals From Wastewater

Metal ,Treatment, by Hydroxide Precipitation As metals enter the ,treatment, process, they are in a stable, dissolved aqueous form and are unable to form solids. The goal of metals ,treatment, by hydroxide precipitation is then to adjust the pH (hydroxide ion concentration) of the water so that the metals will form insoluble precipitates. Once the metals

Treatment of Wastewater Containing a Mixture of Heavy ...
Treatment of Wastewater Containing a Mixture of Heavy ...

Treatment, of ,Wastewater Containing, a Mixture of Heavy Metal Ions (,Copper,-Zinc, ,Copper,-Nickel) ... cations and resistance to both ,acidic, and alkaline media, has regenerative properties, which allow ... ,copper, and nickel is shown in Fig. 3 and in Fig. 4.

Integrated copper-containing wastewater treatment using ...
Integrated copper-containing wastewater treatment using ...

Results from metal removal experiments showed that KEX was suitable for the treatment of copper-containing wastewater over a wide copper concentration range (50, 100, 500, and 1000 mg/l) to the level that meets the Taiwan EPA's effluent regulations (3mg/l).

Treatment of industrial acidic wastewater containing ...
Treatment of industrial acidic wastewater containing ...

Aimming at the industrial ,acidic wastewater containing, high-,copper, at a plant,the effect of sodium sulfide and heavy metal composite trapping agent on the ,treatment, of ,copper, ions in water has been investigated. The best ,treatment, conditions,such as the dosage of chemicals,reaction time,pH value,and dosing mode are determined. The reaction time is 20 min,and sodium sulfide and trapping agent ...

Treatment of acidic copper-containing wastewater using ...
Treatment of acidic copper-containing wastewater using ...

A study of treating the ,acidic copper,-,containing wastewater,(Cu2+ concentration of 143.00 mg/L,pH 1.80-2.00) from the laboratory of East China Institute of Technology using the processed eggshells is carried out.The effect of various parameters including calcining temperature,amount and particle size of eggshells,stirring speed on removal rate of Cu2+ is investigated.The optimum condition is ...

Removal of Copper From Wastewater By Cementation From ...
Removal of Copper From Wastewater By Cementation From ...

A number of technologies were developed over the years to remove copper from wastewater. The most important of these technologies include adsorption [3], chemical precipitation [4], ion exchange [5], reverse osmosis [6] and electrodialysis [7], but all of them have drawbacks.

Treatment of Electroplating Wastewater by Adsorption Technique
Treatment of Electroplating Wastewater by Adsorption Technique

chromium was around 95% [8]. ,Copper, from ,wastewater, was removed by using fly ash, with the efficiency of 62% and 98% at 60 mg/l and 2 mg/l ,copper, concentration respectively [9]. Schmuhl et al. (2001)[10] established the effect of chitosan on adsorption of Cr+6 …

Wastewater Treatment during PCB Fabrication Process | PSPCB
Wastewater Treatment during PCB Fabrication Process | PSPCB

(2) Cleaning: Before the PCB imaging, there will be a pre-treatment process, which is to clean the copper surface with a dilute sulfuric acid solution and polish it with machines, in order to remove oxides. Organic wastewater and sulfuric acid mist gas get produced here.

TREATMENT OF ACIDIC WASTEWATER FROM THIEN KE TIN ...
TREATMENT OF ACIDIC WASTEWATER FROM THIEN KE TIN ...

from the ,wastewater,, such as iron from 143.1 mg/L to 0.3 mg/L, ,copper, from 16.32 mg/L to 0.04 mg/L and manganese from 10.9 mg/L to 0.05 mg/L. The continuous mode with a hydraulic load of 100 l/h and an according retention time of three days showed constitutive contaminant removal. The effluent pH of the system was around 7 within six-day period.

The Treatment of Copper-Containing Wastewater by ...
The Treatment of Copper-Containing Wastewater by ...

The effect of ,electrolysis-enhanced micro-electrolysis fluidized, bed technology on treating cooper-,containing wastewater, had been systematic researched. Operation conditions including applied flow rate, voltage, solution pH and reaction time on the ,copper, ions (Cu2+) removal effect, had been studied scanning electron microscope (SEM) analysis had been used to characterize the surface features ...

Treatment of industrial acidic wastewater containing ...
Treatment of industrial acidic wastewater containing ...

Aimming at the industrial ,acidic wastewater containing, high-,copper, at a plant,the effect of sodium sulfide and heavy metal composite trapping agent on the ,treatment, of ,copper, ions in water has been investigated. The best ,treatment, conditions,such as the dosage of chemicals,reaction time,pH value,and dosing mode are determined. The reaction time is 20 min,and sodium sulfide and trapping agent ...

Removing Heavy Metals From Wastewater
Removing Heavy Metals From Wastewater

Metal ,Treatment, by Hydroxide Precipitation As metals enter the ,treatment, process, they are in a stable, dissolved aqueous form and are unable to form solids. The goal of metals ,treatment, by hydroxide precipitation is then to adjust the pH (hydroxide ion concentration) of the water so that the metals will form insoluble precipitates. Once the metals

Research on the Removal Effect of Acidic Wastewater ...
Research on the Removal Effect of Acidic Wastewater ...

Steel slag which is a byproduct of the steelmaking process was found to be a low cost and promising adsorbent for the removal of Copper from acidic wastewater. Batch experiments were conducted to study the main parameters such as dosage of adsorbent, particle size initial adsorbate concentration, contact time, kinetic, and pH solution on the sorption of Copper (II) by steel slag.

Direct Treatment of an Acidic and High‐Strength Nitrate ...
Direct Treatment of an Acidic and High‐Strength Nitrate ...

Continuous experiments were carried out by feeding a synthetic ,wastewater containing, nitrate and binary heavy metal ions (,copper, and lead) at different loads and current densities. Acetate was added at 1.0 of C/N mass ratio which was less than the stoichiometric amount for the overall denitrification reaction.

Direct Treatment of an Acidic and High‐Strength Nitrate ...
Direct Treatment of an Acidic and High‐Strength Nitrate ...

Continuous experiments were carried out by feeding a synthetic ,wastewater containing, nitrate and binary heavy metal ions (,copper, and lead) at different loads and current densities. Acetate was added at 1.0 of C/N mass ratio which was less than the stoichiometric amount for the overall denitrification reaction.

Treatment of acidic copper-containing wastewater using ...
Treatment of acidic copper-containing wastewater using ...

A study of treating the ,acidic copper,-,containing wastewater,(Cu2+ concentration of 143.00 mg/L,pH 1.80-2.00) from the laboratory of East China Institute of Technology using the processed eggshells is carried out.The effect of various parameters including calcining temperature,amount and particle size of eggshells,stirring speed on removal rate of Cu2+ is investigated.The optimum condition is ...

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