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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 drilling fluids chemicals
Pulp Mill Wastewater: Characteristics and Treatment ...
Pulp Mill Wastewater: Characteristics and Treatment ...

1/4/2016, · This can be done segregating the ,acid, and alkaline effluent streams and recirculating the liquids countercurrently from the last bleach stage through the sequence to the brown stock washer. The alkaline effluent could be ,used, for washing the pulp in the unbleached part of the process.

Environmental Contamination by Heavy Metals | IntechOpen
Environmental Contamination by Heavy Metals | IntechOpen

6/10/2017, · A variety of, alkaline chemical reagents, have been used over the years for neutralisation of acid mine drainage (AMD) in order to increase the pH and …

Arsenic Treatment Technologies for
Arsenic Treatment Technologies for

and treaters of arsenic-contaminated waste and ,wastewater,; owners and operators of drinking water treatment plants; regulators; and the interested public. There is a growing need for cost-effective arsenic treatment. The presence of arsenic in the environment can pose a risk to human health.

water treatment - coagulation-flocculation typical reagents
water treatment - coagulation-flocculation typical reagents

The most common reagents used are:, aluminium sulphate,, either crystallised: Aℓ 2 (SO 4) 3, 14 or 18 H 2 O, or liquid: 600 or 7 2 0 g · L –1 solution of crystallised, aluminium sulphate, 18H 2 O; commonly called "Alum" in English. liquid aluminium chloride AℓCℓ 3 (effective but rare)

US20090120881A1 - Treatment blends for removing metals ...
US20090120881A1 - Treatment blends for removing metals ...

Treatment of industrial ,wastewater, streams relate to the use of a pretreatment blend and a treatment blend, which remove heavy metals in industrial processes. The aqueous pretreatment blend comprises: 1) ferrous sulfate heptahydrate, 2) aluminum sulfate, 3) 85% phosphoric ,acid,, and 4) coagulant.

Laboratory Procedures: Analysis for Wastewater Treatment ...
Laboratory Procedures: Analysis for Wastewater Treatment ...

To neutralize strong acid on skin or clothing wash with, tap water, and apply dilute Ammonium Hydroxide solution. 6. To neutralize strong alkali or base chemical on skin or clothing wash with excess of, tap water, and apply dilute acetic or hydrochloric acid. 7.

TREATMENT BLENDS FOR REMOVING METALS FROM WASTEWATER …
TREATMENT BLENDS FOR REMOVING METALS FROM WASTEWATER …

A pretreatment blend for treating wastewater, comprising: ferrous sulfate heptahydrate; aluminum sulfate; about 85% phosphoric acid; and coagulant; wherein the pretreatment blend is acidic. 9. A pretreatment blend for treating wastewater, consisting essentially: two types of metal sulfates; acid; and a …

Effective biotreatment of acidic mine water and hospital ...
Effective biotreatment of acidic mine water and hospital ...

1/10/2020, · Also, in FBR, the recycle stream reduces high feed concentrations, making FBR more suitable for treating acidic wastewater with metals and sulfate [ 19, 20 ]. Against this literature backdrop, this study seeks to use the, sulfidogenic, FBR to explore the co …

Arsenic Treatment Technologies for Soil Waste and Water
Arsenic Treatment Technologies for Soil Waste and Water

; Media Treated: • Soil • Sludge Other solids Industrial waste Binders and ,Reagents used, in S/S of Arsenic: , Cement Fly Ash Lime Phosphate pH adjustment agents Sulfur Dry ,Reagents, Water (If Required) I Liquid ,Reagents, Stabilized Waste The process also may include the addition of pH adjustment agents, phosphates, or sulfur ,reagents, to reduce the setting or curing time, increase the compressive strength, …

Reducing Organic Pollution of Wastewater from Milk ...
Reducing Organic Pollution of Wastewater from Milk ...

amount of 2 mL of concentrated sulfuric acid (18M, 99% purity) is added to each liter of wastewater to prevent natural biodegradation [17]. It is diluted at a ratio of 1:10 using distilled water. Chemical reagents used include Potassium Dichromate, Sulfuric Acid 99% purity, Potassium Hydrogen Phthalate, 1.1 Phanthroline and Ferrous Sulfate.

Coal-based adsorbents for water and wastewater treatment ...
Coal-based adsorbents for water and wastewater treatment ...

1/6/2016, · In a study by Mohan and Chander ,, lignite, was used to remove and recover metal ions from acid mine drainage (AMD) in single and multiple column setups. The single and multiple columns in downward flow modes were used to simulate industrial conditions for acid mine wastewater treatment.

Mining Wastewater | liquideffluents
Mining Wastewater | liquideffluents

17/5/2012, · As well as the use of constructed wetlands, ion exchanges and the precipitation of metal sulphides, often, chemicals such as ammonia, quicklime and caustic soda can be ,used, as neutralising agents for the ,acid, discharges from mines (Skousen, Hilton and Faulkner, 1996).

TREATMENT BLENDS FOR REMOVING METALS FROM …
TREATMENT BLENDS FOR REMOVING METALS FROM …

At least two of which are alkali treatment ,reagents,, ,used, for ... ,acid, is then added. Preferably, about 100 gallons of the 85% phosphoric ,acid, is ,used,. The mixture is mixed for about 5 ... The blends can be ,used, in various applications for treating industrial ,wastewater,. The blends can ,used to treat wastewater, …

PNAS Plus: Social demographic and economic correlates of ...
PNAS Plus: Social demographic and economic correlates of ...

22/10/2019, · ,Wastewater,-based epidemiology (WBE) is a method of systematically sampling and analyzing chemical residues in ,wastewater, influent to measure a population’s consumption of or exposure to chemicals. Per-capita consumption of specific chemicals can be estimated by normalizing biomarker concentrations in ,wastewater, to the volume of ,wastewater, and size of the contributing …

Diagnostics for SARS-CoV-2 infections | Nature Materials
Diagnostics for SARS-CoV-2 infections | Nature Materials

15/2/2021, · Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread to nearly every corner of the globe, causing societal instability. The resultant coronavirus disease 2019 (COVID-19) leads ...

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