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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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Textile Dyeing Wastewater Treatment - IntechOpen
Textile Dyeing Wastewater Treatment - IntechOpen

adjust ,the pH value, of the textile dyeing ,wastewater,. The total nitrogen and ammonia nitrogen come from dyes and raw materials, which is not very high, about 10 mg/L. But the urea is needed while using batik techniques. Its total nitrogen is 300 mg/L, which is hard to treat. The phosphorus in the ,wastewater, comes from the phosphor detergents.

Wastewater and Sludge | Lhoist - Minerals and lime producer
Wastewater and Sludge | Lhoist - Minerals and lime producer

Wastewater, must be neutralized to adjust its ,pH value,. Only by doing this, it can meet the requirements of different processing units within a ,wastewater, treatment system. Neutralization may be used to treat ,acid, wastewaters containing metals. Adding an alkaline reagent increases ,the pH, of the ,acid, waste.

On the importance of pH value in coagulation | Journal of ...
On the importance of pH value in coagulation | Journal of ...

For low pH and alkalinity (mostly coloured) surface waters' pre-treatment with lime, soda ash or caustic soda is normally required to ensure that the optimum coagulation pH is achieved. On the other hand, for high alkalinity or pH waters acid is dosed to decrease the pH/alkalinity to …

Understanding and improving the reusability of phosphate ...
Understanding and improving the reusability of phosphate ...

15/11/2018, · In the alkaline-acid regeneration, a pH of 4 was used for the acid wash step. This was to make sure iron dissolution from the iron oxides does not happen. In the acid-alkaline regeneration, we tried to improve the reusability by having stronger acid wash conditions. This was done by first having longer exposure time with pH 4.

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

Wastewater, flows into the first reaction tank, where ,the pH, is measured and sulfuric ,acid, is automatically brought into the process until a ,pH, set point ,value, in the acidic range is achieved. The reaction time is just a few minutes, and a lower ,pH, for an even faster reaction would require considerably more ,acid,.

Efficient Synthesis of α-FeOOH from Pickling Wastewater in ...
Efficient Synthesis of α-FeOOH from Pickling Wastewater in ...

The pickling ,wastewater, is produced during the pickling process of steel; it has strong acidity and contains around 60− 250 g/L of Fe2+.25,26 The Fe2+ of pickling ,wastewater, is generated by the reaction ,of acid, and steel during the pickling process, and ,the pH, range of the pickling ,wastewater, is around 1−2.

Batch and continuous pH control compared and contrasted ...
Batch and continuous pH control compared and contrasted ...

The best ,pH, for a ,wastewater, treatment process depends on the ultimate water use affected by ,pH,. For example, ,the pH value, for discharging treated ,wastewater, into an environmental water stream (ocean, river or creek) often has requirements for regulated ,pH, ranges between 6.0 and 9.0 and they may be different as compared to discharging pre-treated ,wastewater, into a municipal sewer system having requirements for regulated ,pH, …

Textile Dyeing Wastewater Treatment - IntechOpen
Textile Dyeing Wastewater Treatment - IntechOpen

adjust ,the pH value, of the textile dyeing ,wastewater,. The total nitrogen and ammonia nitrogen come from dyes and raw materials, which is not very high, about 10 mg/L. But the urea is needed while using batik techniques. Its total nitrogen is 300 mg/L, which is hard to treat. The phosphorus in the ,wastewater, comes from the phosphor detergents.

Efficient Synthesis of α-FeOOH from Pickling Wastewater in ...
Efficient Synthesis of α-FeOOH from Pickling Wastewater in ...

The pickling ,wastewater, is produced during the pickling process of steel; it has strong acidity and contains around 60− 250 g/L of Fe2+.25,26 The Fe2+ of pickling ,wastewater, is generated by the reaction ,of acid, and steel during the pickling process, and ,the pH, range of the pickling ,wastewater, is around 1−2.

The Ultimate Guide to Wastewater Treatment
The Ultimate Guide to Wastewater Treatment

By recovering metals from ,wastewater, in a pure form, they can be recycled within the manufacturing process or sold to generate revenue to offset treatment costs. Furthermore, treating so-called 'bleed streams' in this way allows for the recycling of the effluent decreasing the need for fresh water and chemicals such as ,acid,, caustic, etc.

pH Meter Calibration Problems? Check Out These 12 Tips!
pH Meter Calibration Problems? Check Out These 12 Tips!

It plays a role in the taste (,acid, = fresh, neutral = bland, and alkaline = inedible) and the preservation of food. In environmental sampling and monitoring, high or low ,pH, values can be indicative of pollution. In ,wastewater, treatment, ,pH, is regulated as part of discharge permitting and many treatment processes are ,pH, …

Phosphate removal performance of acid pickling milling ...
Phosphate removal performance of acid pickling milling ...

The acid pickling milling wastewater from high-phosphate hematite mineral processing should be treated and comprehensively reused on-line with a low pH value and a high phosphate removal. The absorbents, raw and different activated red mud (RM), named as RM-α, β, γ, δ, and ε, were firstly studied on the phosphate removing performances in this paper.

PH Explained: Understanding pH in Your Drinking Water ...
PH Explained: Understanding pH in Your Drinking Water ...

Injection systems can treat water with a pH as low as four. 3. Acid Injection. The acid injection method treats water with a high pH by lowering its pH value to around seven. The acid injection method eliminates the water’s soda taste and can improve chlorination effectiveness.

pH Meter Calibration Problems? Check Out These 12 Tips!
pH Meter Calibration Problems? Check Out These 12 Tips!

It plays a role in the taste (,acid, = fresh, neutral = bland, and alkaline = inedible) and the preservation of food. In environmental sampling and monitoring, high or low ,pH, values can be indicative of pollution. In ,wastewater, treatment, ,pH, is regulated as part of discharge permitting and many treatment processes are ,pH, …

What contact time is adequate for a wastewater treatment ...
What contact time is adequate for a wastewater treatment ...

Inadequate contact time available for adjusting ,pH, became a major obstacle, along with excessive alkaline chemical usage needed to raise ,pH, of incoming low ,pH wastewater, and excessive amounts ,of acid, chemical used to lower ,pH, of incoming high ,pH wastewater,. The effluent ,pH, was not only unacceptably erratic, with ,pH, violations, but ,the pH, ...

What contact time is adequate for a wastewater treatment ...
What contact time is adequate for a wastewater treatment ...

Inadequate contact time available for adjusting ,pH, became a major obstacle, along with excessive alkaline chemical usage needed to raise ,pH, of incoming low ,pH wastewater, and excessive amounts ,of acid, chemical used to lower ,pH, of incoming high ,pH wastewater,. The effluent ,pH, was not only unacceptably erratic, with ,pH, violations, but ,the pH, ...

The Ultimate Guide to Wastewater Treatment
The Ultimate Guide to Wastewater Treatment

By recovering metals from ,wastewater, in a pure form, they can be recycled within the manufacturing process or sold to generate revenue to offset treatment costs. Furthermore, treating so-called 'bleed streams' in this way allows for the recycling of the effluent decreasing the need for fresh water and chemicals such as ,acid,, caustic, etc.

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