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Contract for transportation and disposal of fracturing flowback fluid

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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Contract for transportation and disposal of fracturing flowback fluid
Degradation of folic acid wastewater by electro-Fenton ...
Degradation of folic acid wastewater by electro-Fenton ...

Changes with time at different concentrations of folic acid wastewater. Notes: initial pH 5; air sparging rate 0.75 l min −1 ; current density 10.26 mA cm −2 ; [Fe 2+ ] 1.0 mM; reaction time 90 min.

Toward Understanding pH - Microscopes | pH Meters
Toward Understanding pH - Microscopes | pH Meters

This color change is not at a fixed ,pH,, but rather, it occurs ,gradually, over a range of ,pH, values. This range is termed the color change interval. Each ,pH, indicator is defined by a useful ,pH, range. For example Phenolphthalein ,changes, from colorless at 8.0 to pink at 10.0. And Bromthymol Blue has a useful range from 6.0 (yellow) to 7.6 (blue).

Effects of pH and Oxygen and Ammonium Concentrations on ...
Effects of pH and Oxygen and Ammonium Concentrations on ...

The pH, range for growth of pure cultures of ammonia oxidizers is ,5,.8 to 8.,5,, and ,the pH, range for growth of nitrite oxidizers is 6.,5, to 8.,5, . Nitrification was inhibited at ,pH, values below ,5,.8 in our preliminary experiments performed with an enriched culture of nitrifiers obtained from ,wastewater,.

Study on the Degradation of Phenol Wastewater Using ...
Study on the Degradation of Phenol Wastewater Using ...

The phenol ,wastewater, with high concentration was treated by hydroxyl radical produced by a strong ionization discharge plasma in the present article.Salicylic ,acid, used as molecular probe to determine the concentration of hydroxyl radical.The phenol elimination efficiency of ,wastewater, whose initial concentration was 1 21 ,5, mg·L-1 could reach 99.11% when the concentration of hydroxyl radical was 1 037 mg·L-1;while the initial concentration of 8 853 mg·L-1 of phenol ,wastewater, …

Enhanced Bio-hydrogen Production from Protein Wastewater ...
Enhanced Bio-hydrogen Production from Protein Wastewater ...

5/2/2014, · Enhanced bio-,hydrogen production from protein wastewater by altering protein structure, and amino acids acidification type via ,pH, control was investigated. …

Microbial synthesis of poly-γ-glutamic acid (γ-PGA) with ...
Microbial synthesis of poly-γ-glutamic acid (γ-PGA) with ...

28/10/2020, · As shown in Fig. 4a, the increase of medium ,pH value, led to a ,gradually, decreased γ-PGA production in the broth. The biomass was changed with the change of medium ,pH value,, and at ,pH, 7.0, the biomass achieved the highest ,value,. The biomass was decreased at ,pH, 6.,5,, increased at ,pH, 7.0, then decreased again at ,pH, 7.,5,, and increased again at ,pH, 8.0.

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

The purified pickling water was mixed with distilled water to adjust its ferrous concentration to 0.,5, mol/L. ,The pH, of the purified pickling water is around 2–3; alkali was added to adjust the initial ,pH to 5,. During the reaction process, no alkali was added to observe ,the pH value, of the solution ,changes, over time.

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

The purified pickling water was mixed with distilled water to adjust its ferrous concentration to 0.,5, mol/L. ,The pH, of the purified pickling water is around 2–3; alkali was added to adjust the initial ,pH to 5,. During the reaction process, no alkali was added to observe ,the pH value, of the solution ,changes, over time.

Chromium removal from industrial wastewater using ...
Chromium removal from industrial wastewater using ...

22/8/2018, · In order to study the possibility of repeated use of Cu-S·PPP-SH, the efficiency of chromium removal was also tested using hexavalent chromium-electroplating ,wastewater, and trivalent chromium-tanning ,wastewater,. 0.,5, g Cu-S·PPP-SH was added to a conical flask containing 100mL of electroplating ,wastewater, or tanning ,wastewater, sample and shaken at 25°C for 90 min. Adjust ,the pH, of the ...

Microbial synthesis of poly-γ-glutamic acid (γ-PGA) with ...
Microbial synthesis of poly-γ-glutamic acid (γ-PGA) with ...

28/10/2020, · As shown in Fig. 4a, the increase of medium ,pH value, led to a ,gradually, decreased γ-PGA production in the broth. The biomass was changed with the change of medium ,pH value,, and at ,pH, 7.0, the biomass achieved the highest ,value,. The biomass was decreased at ,pH, 6.,5,, increased at ,pH, 7.0, then decreased again at ,pH, 7.,5,, and increased again at ,pH, 8.0.

Toward Understanding pH - Microscopes | pH Meters
Toward Understanding pH - Microscopes | pH Meters

This color change is not at a fixed ,pH,, but rather, it occurs ,gradually, over a range of ,pH, values. This range is termed the color change interval. Each ,pH, indicator is defined by a useful ,pH, range. For example Phenolphthalein ,changes, from colorless at 8.0 to pink at 10.0. And Bromthymol Blue has a useful range from 6.0 (yellow) to 7.6 (blue).

Study on the Degradation of Phenol Wastewater Using ...
Study on the Degradation of Phenol Wastewater Using ...

The phenol ,wastewater, with high concentration was treated by hydroxyl radical produced by a strong ionization discharge plasma in the present article.Salicylic ,acid, used as molecular probe to determine the concentration of hydroxyl radical.The phenol elimination efficiency of ,wastewater, whose initial concentration was 1 21 ,5, mg·L-1 could reach 99.11% when the concentration of hydroxyl radical was 1 037 mg·L-1;while the initial concentration of 8 853 mg·L-1 of phenol ,wastewater, …

Polyacrylamide for steel wastewater
Polyacrylamide for steel wastewater

Mine ,wastewater, is sulfuric ,acid, type ,wastewater,, with a general ,pH, of 1.6. Such a low sulfuric ,acid, content obviously has no recovery ,value,, so neutralization is often used. Method. The treatment of mine ,acid wastewater, generally adopts the lime neutralization method. Iron and steel plant ,wastewater, treatment uses anionic polyacrylamide as a flocculant to treat ,wastewater, produced in steel plants.

Effects of pH and Oxygen and Ammonium Concentrations on ...
Effects of pH and Oxygen and Ammonium Concentrations on ...

The pH, range for growth of pure cultures of ammonia oxidizers is ,5,.8 to 8.,5,, and ,the pH, range for growth of nitrite oxidizers is 6.,5, to 8.,5, . Nitrification was inhibited at ,pH, values below ,5,.8 in our preliminary experiments performed with an enriched culture of nitrifiers obtained from ,wastewater,.

Refined soybean oil wastewater treatment and its ...
Refined soybean oil wastewater treatment and its ...

1/11/2018, · The release of refined soybean oil ,wastewater, (RSOW) with a high chemical oxygen demand (COD) and oil content burdens the environment. The conversion of RSOW into lipids by oleaginous yeasts may be a good way to turn this waste into usable products. ,The oleaginous yeast Trichosporon fermentans, was used for treating the RSOW without sterilization, dilution, or nutrient supplementation.

Study on the Degradation of Phenol Wastewater Using ...
Study on the Degradation of Phenol Wastewater Using ...

The phenol ,wastewater, with high concentration was treated by hydroxyl radical produced by a strong ionization discharge plasma in the present article.Salicylic ,acid, used as molecular probe to determine the concentration of hydroxyl radical.The phenol elimination efficiency of ,wastewater, whose initial concentration was 1 21 ,5, mg·L-1 could reach 99.11% when the concentration of hydroxyl radical was 1 037 mg·L-1;while the initial concentration of 8 853 mg·L-1 of phenol ,wastewater, …

Degradation of folic acid wastewater by electro-Fenton ...
Degradation of folic acid wastewater by electro-Fenton ...

Changes with time at different concentrations of folic acid wastewater. Notes: initial pH 5; air sparging rate 0.75 l min −1 ; current density 10.26 mA cm −2 ; [Fe 2+ ] 1.0 mM; reaction time 90 min.

Enhanced Bio-hydrogen Production from Protein Wastewater ...
Enhanced Bio-hydrogen Production from Protein Wastewater ...

5/2/2014, · Enhanced bio-,hydrogen production from protein wastewater by altering protein structure, and amino acids acidification type via ,pH, control was investigated. …

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