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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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extra deep well drilling waste water emission treatment technology ltd
A novel method to remove chromium vanadium and ammonium ...
A novel method to remove chromium vanadium and ammonium ...

15/8/2017, · The Cr(VI) and V(V) were reduced rapidly to Cr(III) and V(IV) by FGD byproduct within 5 min, which was similar to the traditional inorganic reductant, such as ,sodium pyrosulfite, and ferrous sulfate. Therefore, the novel treatment method of vanadium industrial ,wastewater, using the FGD byproduct is feasible, and the FGD byproduct is a low-cost, effective and environmental alternative to traditional …

Physical Chemical and Microbiological Methods of Solid ...
Physical Chemical and Microbiological Methods of Solid ...

Add 2 5 ml concentrated NH4OH (S.G. 0.90), and dilute with distilled water to 1 liter. 9. Amino solution: In 500 ml distilled water, dissolve (in order specified) 18.5 g ,sodium, sulfite (NaaSO3), 0.500 g l-amino-2-naphthol-4-sulfonic ,acid,, and 31 g ,sodium, metabisulfite (,sodium pyrosulfite,, Na2 S2 O5).

Practical and Sustainable Modification Method on Activated ...
Practical and Sustainable Modification Method on Activated ...

Then, 3.67 g of activated carbon solution (27.2 wt %, the solvent was ultrapure water or 2 g/L sodium pyrosulfite aqueous solution) was added to the crude APAP solution and heated up to 100 °C. The decolorization was completed 15 min later, and the activated carbon was filtered out while the reaction solution was hot.

TREATMENT OF WASTEWATER CONTAINING HEAVY METALS USING ...
TREATMENT OF WASTEWATER CONTAINING HEAVY METALS USING ...

Treatment of wastewater containing heavy metals using filters, made of advanced silica-based… 21 2. ,Materials, and methods 2.1. ,Materials, and preparation of SiO 2 nanoparticles Two types of SiO 2 nanopowders identified through codes: R2 and R4 with a well-defined hexagonal structure have been developed by varying both the

CN101812593A - Method for depositing vanadium wastewater ...
CN101812593A - Method for depositing vanadium wastewater ...

The method comprises the following steps: adding acid ammonium salt for depositing, vanadium wastewater, according to a certain liquid-to-solid ratio into vanadium-extraction tailings, stirring...

Inorganic Salts Inorganic Salts List - Echemi
Inorganic Salts Inorganic Salts List - Echemi

Sodium, metabisulfite or ,sodium pyrosulfite, (IUPAC spelling; Br. E. ,sodium, metabisulphite or ,sodium, pyrosulphite) is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to as disodium (metabisulfite). It is used as a disinfectant, antioxidant and preservative agent.

Sodium Pyrosulfite Sodium ... - Wastewater Chemicals
Sodium Pyrosulfite Sodium ... - Wastewater Chemicals

Sodium Metabisulfite is also named as sodium pyrosulfite or sodium disulfide, it is soluble in water to become, sodium ammonium sulfite, with stability, the liquid is acidic. When exposing to the air, the powder would be oxidized slowly and release sulfur dioxide, and it …

waste chemical disposal | ASSIST
waste chemical disposal | ASSIST

Answer by labsupport on question Answer by ritasteffe on question waste chemical disposal. All schools have a responsibility to dispose of their chemical waste in a safe and environmentally responsible manner. In NSW the Environmental Protection Authority (EPA) administers the management of chemical waste. http://www.epa.nsw.gov.

14 Industrial Wastewater Treatment Principals and Ideas
14 Industrial Wastewater Treatment Principals and Ideas

14 Industri al ,Wastewater Treatment Principals and Ideas,. Industrial ,wastewater, refers to ,waste water,, sewage and waste liquid produced in industrial production processes, which contain industrial production ,materials,, intermediate products and products that are lost …

Wastewater Treatment Solutions - Dober
Wastewater Treatment Solutions - Dober

Wastewater treatment, concentrates waste ,materials,, transforms them, and/or segregates them for disposal away from water discharging to the environment or publicly-owned ,treatment, works (POTW). This contrasts to the old adage “dilution is the solution to pollution”, which diffuses pollutants into the environment at discharge.

Silo storage and storage - General information - 2021
Silo storage and storage - General information - 2021

This is especially important when you can not cook haylage, especially hay. It is recommended to add chemical preservatives to the fermented mass at the rate of: ,sodium pyrosulfite, 4-5 kg / t, benzoic ,acid, 3-4 kg / t, formic ,acid, 4-5 l / t, propionic ,acid, 4-5 l / t or acetic ,acid, 5 l / t.

Industrial Wastewater Treatment | Beatona
Industrial Wastewater Treatment | Beatona

•Al-Rawabi dairy facilities have used phosphoric ,acid, for scale removal. •40-50 % of the phosphorus discharged to the ,wastewater treatment, plant was contributed by the phosphoric ,acid,. •Perform a phosphorus minimization evaluation within the processing plant. Substituted nitric ,acid, or a phosphoric/nitric blend for straight phosphoric ,acid,.

pH Balance In Wastewater Treatment Neutral pH In Wastewater
pH Balance In Wastewater Treatment Neutral pH In Wastewater

Almost every ,wastewater, system has enough excess alkalinity so that this little bit of ,acid, doesn’t even cause a significant dip in the pH. In fact, ,wastewater, plants with limits as low as 0.07 mg/L of total P have switched to Neo WaterFX and eliminated their caustic feeds.

Wastewater Treatment Fact Sheet: External Carbon Sources ...
Wastewater Treatment Fact Sheet: External Carbon Sources ...

Wastewater Treatment Fact Sheet: External Carbon Sources for Nitrogen, Removal. ... or from accumulated ,materials, stored within the cells also referred to as ... ethanol, acetate, acetic ,acid,, glycerol, molasses sugar water and proprietary formulations like MicroC™, a suite of carbon

Practical and Sustainable Modification Method on Activated ...
Practical and Sustainable Modification Method on Activated ...

Then, 3.67 g of activated carbon solution (27.2 wt %, the solvent was ultrapure water or 2 g/L ,sodium pyrosulfite, aqueous solution) was added to the crude APAP solution and heated up to 100 °C. The decolorization was completed 15 min later, and the activated carbon was filtered out while the reaction solution was hot.

CN105537232A - Treatment method for sodium hydrosulfite ...
CN105537232A - Treatment method for sodium hydrosulfite ...

The method comprises the steps of: (1) ,adding, an oxidizing agent into ,sodium, hydrosulfite production residue to carry out oxidation reaction so as to obtain oxidation liquid; and (2) conducting vacuum distillation on the oxidation liquid obtained in step (1), and when the kettle temperature reaches 130-160DEG C, finishing distillation to obtain treated residue.

sodium metabisulphite | LuBon Industry CO.LTD.
sodium metabisulphite | LuBon Industry CO.LTD.

Take this product 1.1g, slowly add dilute hydrochloric ,acid, 10ml, dissolved in a water bath for 10 minutes , let cool, relocated colorimetric tube , add water to 20ml, as was muddy , and ,sodium, thiosulfate solution ( 0.1 control solution mol / L) 0.20ml comparison is made using the same method , no thicker ( 0.2% ) .

Wastewater | ASSIST
Wastewater | ASSIST

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The issues in chromium-containing wastewater treatment by ...
The issues in chromium-containing wastewater treatment by ...

Download Citation | On Jan 1, 2015, Zhiyong Wu and others published The issues in chromium-containing ,wastewater, treatment by ,sodium pyrosulfite, | Find, read and cite all the research you need on ...

Sodium dithionite | Na2S2O4 - PubChem
Sodium dithionite | Na2S2O4 - PubChem

Sodium, hydrosulfite is manufactured in the US by several process routes: the reaction of ,sodium, formate (HCOONa) with caustic soda and sulfur dioxide, in an aqueous methanol solution; by reducing ,sodium, bisulfite (NaHSO3) with electrolytically produced ,sodium, amalgam (NaxHgx); or by reacting sulfur dioxide solution with an aqueous slurry of zinc dust and then converting the zinc salt to ,sodium, hydrosulfite …

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