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

Fracturing flowback valve

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.

Fracturing flowback valve
Recent bioreduction of hexavalent chromium in wastewater ...
Recent bioreduction of hexavalent chromium in wastewater ...

25/11/2017, · Recent bioreduction ,of hexavalent chromium, in ,wastewater, treatment: A review Author links open overlay panel Debabrata Pradhan a Lala Behari Sukla a Matthew Sawyer b Pattanathu K.S.M. Rahman b Show more

Picric acid | C6H3N3O7 - PubChem
Picric acid | C6H3N3O7 - PubChem

Picric acid, is a C-nitro compound comprising phenol having three nitro substtituents at the 2-, 4- and 6-positions. It has a role as an explosive, an antiseptic drug and a fixative. It derives from a 1,3,5-trinitrobenzene and a phenol.It is a conjugate ,acid, of a picrate anion.

Disinfection of treated wastewater - University of Washington
Disinfection of treated wastewater - University of Washington

The ,pH, affects this reaction. Lower ,pH, drives the reaction to make HOCl. HOCl (hypochlorous ,acid,) is a more effective disinfectant than OCl--(hypochlorite ion).(hypochlorite ion). A ,pH, …

Printing - Standard Methods for the Examination of Water ...
Printing - Standard Methods for the Examination of Water ...

© Copyright 1999 by American ,Public Health, Association, American Water Works Association, Water Environment Federation B = ,mL, KHC8H4O4 solution taken for titration, and C = ,mL, NaOH solution used. Use the measured normality in further calculations or adjust to 0.1000N; 1 ,mL, = 5.00 mg CaCO3. d.

WATER & WASTEWATER ANALYSIS CATALOG
WATER & WASTEWATER ANALYSIS CATALOG

WATER & WASTEWATER ANALYSIS CATALOG,. 3. ACIDITY (VOLATILE)/ALKALINITY. Total Alkalinity. ... by neutralizing the sample to a ,pH, of 8 3 using a dilute hydrochloric ,acid, solution, ... HI7010M ,pH, 10 01 buffer solution (230 ,mL,), ,100 mL, beakers (2), tube set with dispensing tip, medium stir bar, ...

Study on Treatment of Salicylhydroxamic Acid Wastewater ...
Study on Treatment of Salicylhydroxamic Acid Wastewater ...

At the optimum conditions such as reaction time 60 min, ,pH, 8, and O 3 mixture flow ,100 mL,/min, O 3 dosage was controlled within 1–10 mg/L by regulating the power of the O 3 generator and influent COD Cr concentration 300–350 mg/L; the removal of COD Cr from ,wastewater, …

Reduction Monitoring in the Chromium Wastewater Treatment ...
Reduction Monitoring in the Chromium Wastewater Treatment ...

First,, hexavalent chromium,, either in the form of chromate or dichromate, is reduced to trivalent chromium., Wastewater, flows into the first reaction tank, where the pH is measured and sulfuric acid is automatically brought into the process until a pH set point value in the acidic range is achieved. The reaction time is just a few minutes, and a lower pH for an even faster reaction would require …

Wastewater Laboratory Procedures And Chemistry
Wastewater Laboratory Procedures And Chemistry

Using the formula as in example number 1 23 x 10 MPN/,100 ml, = 0.001 MPN/,100 ml, = 230,000 MPN or = 230,000 per ,100 ml, Example number 3 Dilutions No. of tubes positive out of 5 tubes set up at each dilution 0 0.1 0.01 0.001 0.0001 0.00001 In example number 3 the code 5-1-0-1 is unreasonable because probability would indicate that the 0.01 dilution should have 1 tube in 5 giving a positive result.

Hexavalent Chromium Wastewater Treatment - Industrial Wastes
Hexavalent Chromium Wastewater Treatment - Industrial Wastes

6/1/2021, · Conventional treatment of hexavalent chromium wastewaters involves the, re,duction, of hexavalent chromium to trivalent chromium, and subsequent, precipitation of trivalent chromium, as, hydroxide., Hexavalent chromium reduction is commonly accomplished using chemical reduction.

pH meters | Hanna Instruments - Official UK Store
pH meters | Hanna Instruments - Official UK Store

The people here at Hanna don't just create products - we create testing systems that help improve everything from the taste of your local craft beer to the quality of the water in your swimming pool.

Nitrate - Hach
Nitrate - Hach

2. Use a pipet to add 1.0, 3.0, 10 and 30.0 ,mL, of a ,100, mg/L ,nitrate,-nitrogen (NO3––N) standard solution into four different ,100,-,mL, Class A volumetric flasks. 3. Dilute to the mark with the prepared chloride water. Mix thoroughly. 4. Complete the test procedure for each of …

STANDARD METHODS FOR THE EXAMINATION OF WATER AND WASTEWATER
STANDARD METHODS FOR THE EXAMINATION OF WATER AND WASTEWATER

d. Bromcresol green indicator solution, ,pH, 4.5 indicator: Dissolve ,100, mg bromcresol green, sodium salt, in ,100 mL, distilled water. e. Mixed bromcresol green-methyl red indicator solution. 3 Use either the aqueous or the alcoholic solution: 1) Dissolve ,100, mg bromcresol green sodium salt and 20 mg methyl red sodium salt in ,100 mL, distilled water.

Iron Total - Hach
Iron Total - Hach

1. Add 5 ,mL, of 6.0 N (1:1) hydrochloric ,acid, solution to ,100 mL, of sample in a 250-,mL, Erlenmeyer flask. 2. Boil for 20 minutes. 3. Let the solution cool to room temperature. 4. Adjust the ,pH, to 3–5 with 5 N sodium hydroxide solution. 5. Add deionized water until the volume is ,100 mL,. 6. Use the treated sample in the test procedure.

New trends in removing heavy metals from industrial wastewater
New trends in removing heavy metals from industrial wastewater

1/10/2011, · The amicon-generated cellulose YM10 was used as the ultrafilter. About ,100,% and 95% rejection were achieved at ,pH, ranging from 8.5 to 9.5 for Cu(II) and Zn(II) ions, respectively. The results indicated that chitosan significantly enhanced metals removal by 6–10 times compared to using membrane alone.

Coagulation and Flocculation in Water and Wastewater ...
Coagulation and Flocculation in Water and Wastewater ...

Acid, alum formulations are aluminum sulfate with 1 to 15-percent free sulfuric ,acid,. Their effectiveness with TOC removal applications is due to the enhanced depression of ,pH,. TOC or NOM reductions depend on the type and dosage of coagulant, the ,pH,, temperature, raw water quality and NOM characteristics.

Chat Online Inquiry Email

Business cooperation

+86 513525609655

Company address

Road West, North Branch, Jingkai Road, Puyang City