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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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oil gas field fracturing flow-back fluids discharge symptoms treatment
Adjusting pH of wastewater & a bit about alkalinity too ...
Adjusting pH of wastewater & a bit about alkalinity too ...

Biological ,wastewater, treatment usually works best in a pH range from 7.0 - 8.0. Remember that this is the "best" range in a general sense. In making bioaugmentation products, we have ,used, strains with pH ranges from 3.0 (Thiobacillus) to 11.0 (alkanophilic Bacillus). The most pH sensitive process tends to be ammonia removal or nitrification.

Calcium removal from industrial wastewater by bio ...
Calcium removal from industrial wastewater by bio ...

The, paper recycling process requires, high, amounts of calcium and, the wastewater, contains, high, calcium concentrations reaching between 10 to 40 mM., Calcium carbonate, (CaCO3) is, used, to improve paper...

water treatment - reagent and treatments than can be used ...
water treatment - reagent and treatments than can be used ...

In fact, only processes 1, 2, 4a and 5 can be recommended and ,used, industrially. Method 3 can be ,used, to supplement processes 1, 5a, 5b or 6 in order to achieve a precise adjustment of pH but using low amounts (in France, the Superior Council for Public Health recommends a ΔNa ≤ 5 mg · L –1). for neutralising hard water acidification

Lesson 8: Nitrification and Denitrification
Lesson 8: Nitrification and Denitrification

Alkalinity actually refers to a number of chemicals that collectively do the job of absorbing acid. One of those chemicals is calcium carbonate (CaCO 3). The measurement of alkalinity in mg/L is actually given as the concentration of calcium carbonate that would absorb just as much acid as all those in the water sample collectively do.

What is Calcium Carbonate (CaCO3)? - Definition from ...
What is Calcium Carbonate (CaCO3)? - Definition from ...

6/2/2017, · Calcium carbonate in the form of lime has many uses, including: To raise the pH of acidic soil in order to “sweeten” it. As a deodorizer in stables, barns, and greenhouses. As a bacterial disinfectant. In wastewater treatment to raise the pH and produce more favorable alkaline conditions.

water treatment - reagent and treatments than can be used ...
water treatment - reagent and treatments than can be used ...

In fact, only processes 1, 2, 4a and 5 can be recommended and ,used, industrially. Method 3 can be ,used, to supplement processes 1, 5a, 5b or 6 in order to achieve a precise adjustment of pH but using low amounts (in France, the Superior Council for Public Health recommends a ΔNa ≤ 5 mg · L –1). for neutralising hard water acidification

Beneficial reuse of treated municipal wastewater and flue ...
Beneficial reuse of treated municipal wastewater and flue ...

1/10/2020, · Because weak-acid CER requires the presence of alkalinity [ 25, 26 ], bicarbonate was added to the synthetic wastewater on a 1:1 equivalent ratio with calcium to neutralize H + released by the weak-acid CER during CIX treatment. Table 1. Composition of wastewaters used in CIX treatment experiments.

Tannin Removal - Water and Wastewater News | WWD
Tannin Removal - Water and Wastewater News | WWD

Calcium carbonate precipitation can be cleaned with a weak acid., Citric, or phosphoric acid will dissolve calcium carbonate precipitation. The unit and associated plumbing must be compatible with any cleaning agent. Most types of metal fouling can be treated in the same fashion.

Why Is Calcium Carbonate Used As Fertilizer | Cromalinsupport
Why Is Calcium Carbonate Used As Fertilizer | Cromalinsupport

Calcium Nitrate is also used in wastewater treatment, as a component in the manufacture of concrete, for medicinal purposes in cooling baths, and to store energy in solar power plants. Calcium carbonate , the chief component of limestone, is a widely used amendment to neutralize soil acidity and to supply calcium (Ca) for plant nutrition.

Controlling the acid capacity on wastewater treatment plants
Controlling the acid capacity on wastewater treatment plants

Sodium ,carbonate, is also ,used, to increase the ,acid, capacity, but it is much more expensive than hydrated lime. Adequate measurement points In the aeration tank, a sufficiently high ,acid, capacity is necessary because the biodegradation processes can be disturbed by low pH values. The determination of the ,acid, capacity is of particular

Alkalinity - Water/Wastewater Distance Learning at ...
Alkalinity - Water/Wastewater Distance Learning at ...

Lime is often added to increase soil pH and buffer soil and fertilizer, acids., In watersheds where, calcium carbonate, isn’t available,, carbonic acid, is an important source for, carbonate, and bicarbonate. Carbon dioxide and water are converted to, carbonic acid, through the following reaction: CO2+ H2O ↔ H2CO3(carbonic acid)

Lesson 8: Nitrification and Denitrification
Lesson 8: Nitrification and Denitrification

Alkalinity actually refers to a number of chemicals that collectively do the job of absorbing ,acid,. One of those chemicals is ,calcium carbonate, (CaCO 3). The measurement of alkalinity in mg/L is actually given as the concentration of ,calcium carbonate, that would absorb just as much ,acid, as all those in the water sample collectively do.

What is Calcium Carbonate (CaCO3)? - Definition from ...
What is Calcium Carbonate (CaCO3)? - Definition from ...

6/2/2017, · Calcium carbonate in the form of lime has many, uses,, including: To raise the pH, of acidic, soil in order to “sweeten” it. As a deodorizer in stables, barns, and greenhouses. As a bacterial disinfectant.

Acidity And Alkalinity - Water Quality - Dr. Darrin Lew
Acidity And Alkalinity - Water Quality - Dr. Darrin Lew

10/4/2021, · The usual convention is to express alkalinity as ppm or mg/L of ,calcium carbonate, (CaCO3). This is done by calculating how much CaCO3 would be neutralized by the same amount of ,acid, as was ,used, in titrating the water sample when measuring * Phenolphthalein and methyl orange are pH-indicator dyes that change color at pH 8.3 and 3.7, respectively.

Alkalinity - Water/Wastewater Distance Learning at ...
Alkalinity - Water/Wastewater Distance Learning at ...

Lime is often added to increase soil pH and buffer soil and fertilizer acids. In watersheds where calcium carbonate isn’t available, carbonic acid is an important source for carbonate and bicarbonate. Carbon dioxide and water are converted to carbonic acid through the following reaction: CO2+ H2O ↔ H2CO3(carbonic acid)

Adjusting pH of wastewater & a bit about alkalinity too ...
Adjusting pH of wastewater & a bit about alkalinity too ...

To lower pH acids such as sulfuric ,acid, (H2SO4) can be ,used,. A newer technology is to use carbon dioxide to adjust pH without the chance to over shoot your target. The correct choice all stems from how much adjustment is required. Raising pH is usually done using sodium hydroxide (caustic soda) (NaOH).

water treatment – precipitation inhibitors - Degremont®
water treatment – precipitation inhibitors - Degremont®

The retarding action is straight forward on ,calcium carbonate, but a little less so on magnesia and ,calcium, sulphate. As a rule, approximately 2 g · m –3 of polyphosphate will be required to stabilise water having a TH and a M-alk. of approximately 20°F. This amount will increase with the TH, M-alk., turbidity and utilisation temperature.

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