Welcome to the company ! we have many years of professional experience !
rsdzd@pyzyrsd.com +86 513525609655

stepped forward

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.

Certificate of Honor

Get in touch with us

We will confidentially process your data and will not pass it on to a third party.

stepped forward
Nitrate and nitrite in drinking-water - WHO
Nitrate and nitrite in drinking-water - WHO

Nitrate, is secreted in saliva and then converted to nitrite by oral microflora. ,Nitrate, can reach both surface water and groundwater as a consequence of agricultural activity (including excess application of inorganic nitrogenous fertilizers and manures), from ,wastewater, treatment and from oxidation of nitrogenous waste

Potassium nitrate | KNO3 - PubChem
Potassium nitrate | KNO3 - PubChem

The effect on dentinal hypersensitivity from the use of a new dentifrice ,containing, 5.0% ,potassium nitrate, and 0.454% stannous fluoride in a silica base (Colgate Sensitive Maximum Strength Toothpaste, Colgate-Palmolive Co.) over an 8-week period was compared to a commercially available dentifrice ,containing, 5.0% ,potassium nitrate, and 0.243% sodium fluoride in a silica base (positive control ...

Background document for development of WHO Guidelines for ...
Background document for development of WHO Guidelines for ...

responsible for most of the ,nitrate, reduction in surface water. Nitrogen compounds are formed in the air by lightning or discharged into it from industrial processes, motor vehicles, and intensive agriculture. ,Nitrate, is present in air primarily as nitric ,acid, and inorganic aerosols, as well as ,nitrate, radicals and organic gases or aerosols. These

The Nitrogen Cycle - How Ammonia and Nitrite are ...
The Nitrogen Cycle - How Ammonia and Nitrite are ...

for the presence of nitrate and/or nitrite. In natural or aquaculture ponds and lakes, this condition is found only in the sludge, but in wastewater, the condition can be created by adding nitrate to collection systems, anaerobic lagoons etc., or is created by addition of wastewater that formerly contained

Electrochemical Denitrification of Nuclear Wastewater
Electrochemical Denitrification of Nuclear Wastewater

waste streams can consist of up to 20% of nitric acid, and it should be noted that nitrates also are present in processes such as pH control of nuclear power plant cooling towers and removal of isotopes from radioactive waste. Consequently, because nitrates are so prevalent

Method 352.1: Nitrogen Nitrate (Colorimetric Brucine) by ...
Method 352.1: Nitrogen Nitrate (Colorimetric Brucine) by ...

6.6 Potassium ,nitrate, standard solution: 1.0 mL = 0.001 mg NO 3-N. Dilute 10.0 mL of the stock solution (6.5) to 1 liter in a volumetric flask. This standard solution should be prepared fresh weekly. 6.7 Acetic ,acid, (1 + 3): Dilute 1 volume glacial acetic ,acid, (CH 3COOH) with 3 volumes of distilled water.

Oil and Gas Production Wastewater: Soil Contamination and ...
Oil and Gas Production Wastewater: Soil Contamination and ...

During oil and natural ,gas production,, so-called “produced water” comprises the largest byproduct stream. In addition, many oil and gas operations are augmented via injection of hydraulic fracturing (HF) fluids into the formation. Both produced water and HF fluids may contain hundreds of individual chemicals, some known to be detrimental to public health and the environment.

Wastewater Nitrification: How it works - ECOS
Wastewater Nitrification: How it works - ECOS

Free nitrous ,acid, (NHO2) is produced from nitrite ions under a low pH in the aeration tank. This type of inhibition is known as substrate inhibition. Substrate inhibition usually occurs at a concentration of 400-500 mg/l ammonium ions or when ammonium ions are converted to nitrite ions at a faster rate than nitrite ions are converted to ,nitrate, ions.

Treatment of water containing organic wastes with aromatic ...
Treatment of water containing organic wastes with aromatic ...

A synthetic sample of aniline wastewater was prepared by dissolving aniline (1.33 g, 14.3 mmole), sulfuric acid (8.0 g, 12 N solution), ammonia (5.90 g, 5.02 N solution), acetic acid (0.7 g, 11.6 mmole) and sodium nitrate (7.65 g, 90 mmole) in 1000 ml of water.

The degradation mechanism of wastewater containing MDEA ...
The degradation mechanism of wastewater containing MDEA ...

A laboratory set up of degradation MDEA waste using UV/H 2 O 2 was conducted and the degradation mechanism has been studied. Glycine, oxalic ,acid,, acetic ,acid,, ,nitrate, ion, nitrite ion and ammonium ion are identified as degradation intermediate product. Published in: …

Background document for development of WHO Guidelines for ...
Background document for development of WHO Guidelines for ...

responsible for most of the ,nitrate, reduction in surface water. Nitrogen compounds are formed in the air by lightning or discharged into it from industrial processes, motor vehicles, and intensive agriculture. ,Nitrate, is present in air primarily as nitric ,acid, and inorganic aerosols, as well as ,nitrate, radicals and organic gases or aerosols. These

Development of a Technology for Treating Wastewater ...
Development of a Technology for Treating Wastewater ...

The production process of nitroaromatic hazardous compounds, with the generation of acidic wastewater, represents a significant danger for the health and safety of the workers and the environment. This wastewater containing solid particles of the nitroaromatic compounds and nitric acid in a concentration range between 58 and 62% constitutes a ...

Electrochemical Denitrification of Nuclear Wastewater
Electrochemical Denitrification of Nuclear Wastewater

waste streams can consist of up to 20% of nitric acid, and it should be noted that nitrates also are present in processes such as pH control of nuclear power plant cooling towers and removal of isotopes from radioactive waste. Consequently, because nitrates are so prevalent

Nitric acid - Wikipedia
Nitric acid - Wikipedia

Nitric acid, (H NO 3), also known as aqua fortis (Latin for "strong water") and spirit of niter, is a highly corrosive mineral ,acid,.. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water. Most commercially available ,nitric acid, has a concentration of 68% in water.

Phenoldisulfonic Acid Method of Determining Nitrate in ...
Phenoldisulfonic Acid Method of Determining Nitrate in ...

Fe-exchanged nano-bentonite outperforms Fe3O4 nanoparticles in removing ,nitrate, and bicarbonate from ,wastewater,. Journal of Hazardous Materials 2019, 376 , 141-152. https://doi.org/10.1016/j.jhazmat.2019.05.025; Zhigang Ke, Prutchayawoot Thopan, Greg Fridman, Vandana Miller, Liangdeng Yu, Alexander Fridman, Qing Huang.

Sodium nitrate - Wikipedia
Sodium nitrate - Wikipedia

Sodium nitrate, is the chemical compound with the formula Na N O 3.This alkali metal ,nitrate, salt is also known as Chile saltpeter (large deposits of which were historically mined in Chile) to distinguish it from ordinary saltpeter, potassium ,nitrate,.The mineral form is also known as nitratine, nitratite or soda niter.. ,Sodium nitrate, is a white deliquescent solid very soluble in water.

Glossary of Wastewater Terms - mgsdistrict.org
Glossary of Wastewater Terms - mgsdistrict.org

A measure of a substances ability to neutralize ,acid,. Water ,containing, carbonates, bicarbonates, hydroxides, and occasionally borates, silicates, and phosphates can be alkaline. Alkaline substances have a pH value over 7 Anaerobic ,Wastewater, Treatment ,Wastewater, treatment in the absence of oxygen, anaerobic bacteria breakdown waste. Bacteria

Nitrogen Nitrate - Hach
Nitrogen Nitrate - Hach

The Chromotropic ,Acid, high range ,nitrate, method involves the reaction of ,nitrate, in a strong ,acid, medium with chromotropic ,acid,. The final reaction mixture is contained in the screw-capped Test ’N Tube ™ vial. The low range ,nitrate, test is also a modification of the Cadmium Reduction Method, and uses a very sensitive chromotropic ,acid, indicator.

Sodium nitrate | NaNO3 - PubChem
Sodium nitrate | NaNO3 - PubChem

The three end-use products, two ,containing, 65% a.i. ,sodium nitrate, and one with 46.2% ,sodium nitrate,, are all used as fumigant gas cartridges designed to be placed in burrows. The ,sodium nitrate, supports the combustion of charcoal in the formulation of each product.

Exploration and verification of the feasibility of sulfide ...
Exploration and verification of the feasibility of sulfide ...

1/4/2021, · In this study, a SPDA process was established in a UASB reactor fed with synthetic ,wastewater containing nitrate,, ammonium and sulfide. This new sulfur cycle-associated anammox reaction was operated for 392 days and achieved a TN removal rate and efficiency of approximately 0.29 kgN/(m³•d) and 80%, respectively, thus proving the feasibility of this long-term application.

Chat Online Inquiry Email

Business cooperation

+86 513525609655

Company address

Road West, North Branch, Jingkai Road, Puyang City