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Oxygen deficiency of acid wastewater

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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Oxygen deficiency of acid wastewater
Pretreatment of Chemical Cleaning Wastewater by ...
Pretreatment of Chemical Cleaning Wastewater by ...

Analyses of chemical cleaning ,wastewater, characteristics, including COD, BOD5 and pH were conducted. COD was determined by potassium ,dichromate, method. BOD5 was determined by dilution and inoculation method. pH value was determined by pH meter. Index COD/mg·L-1 BOD 5/mg·L-1 Oil/mg·L-1 pH Value 20368 2445 320 11.3

Redox_SCS_Electrolysis_CV Q.pdf - HKDSE CVQ Redox ...
Redox_SCS_Electrolysis_CV Q.pdf - HKDSE CVQ Redox ...

View Redox_SCS_Electrolysis_CV Q.pdf from MA 1200 at City University of Hong Kong. HKDSE CVQ / Redox Reactions, Chemical Cells and Electrolysis / P.1 2005 (4) The ,wastewater, generated from an

Electrochemical Treatment of Phenolic Wastewater with ...
Electrochemical Treatment of Phenolic Wastewater with ...

For ,wastewater, degradation, The volume of ,wastewater, degradation electrolytic cell was 100 mL. The anode was TiO 2-SnO 2-graphite plate electrode. The cathode is graphite plate. The effective area of both electrodes is 10 cm2 and the polar distance is 2 cm. During the experiment, 50 mL phenol solution

HOHFWURFKHPLFDOR[LGDWLRQRQ%''DQRGH
HOHFWURFKHPLFDOR[LGDWLRQRQ%''DQRGH

pseudo-first order model. Remarkably, the electrolysis process is significantly speeded up once chloride is added to the reaction. The complete COD removal was achieved in 60 minutes of treatment. Keywords: Boron-doped diamond electrode, Electrochemical oxidation, Veratric ,acid,, ,wastewater,, Advanced oxidation processes 1. Introduction

Electrochemical Treatment of Phenolic Wastewater with ...
Electrochemical Treatment of Phenolic Wastewater with ...

For ,wastewater, degradation, The volume of ,wastewater, degradation electrolytic cell was 100 mL. The anode was TiO 2-SnO 2-graphite plate electrode. The cathode is graphite plate. The effective area of both electrodes is 10 cm2 and the polar distance is 2 cm. During the experiment, 50 mL phenol solution

Electrochemical degradation of the Acid Orange 10 dye on a ...
Electrochemical degradation of the Acid Orange 10 dye on a ...

The COD was determined colorimetrically by the ,dichromate, method. For this purpose, an appropriate amount of the sample was intro-duced into a commercially available digestion solution ,containing, potassium ,dichromate,, sulfuric ,acid,, and mercuric sulfate (HACH LANGE, UK), and the mixture was incubated for 120min at 150oC

CN1015088B - Method for stripping and recovery of chromate ...
CN1015088B - Method for stripping and recovery of chromate ...

Stripping And Recovery Of ,Dichromate, In Electrolytic Chlorate Systems A process for removing dichromates from chlorate-rich solutions ,containing, hypochlorite and ,dichromate, ions and produced by the electrolysis of brine. The ,dichromate, is reduced in a two-stage process by the addition of ammonia under controlled conditions of pH and temperature to a mixed di- and trivalent chromium hydroxide ...

Membrane-separated electrochemical latrine wastewater ...
Membrane-separated electrochemical latrine wastewater ...

Fig. 2 a) COD reduction and b) profiles of total chlorine concentration as a function of ,electrolysis, time. c) NH 4 + oxidation in ,wastewater, during ,electrolysis, and d) the recovery of NH 4 + in RS-A. Tests marked with “M” were performed in CEM separated ,electrolysis,. All the ,electrolysis, tests were conducted at 5 mA cm −2, except for STI (M)* and STI (M)** which were operated at 10 and ...

Treatment of high salt oxidized modified starch waste ...
Treatment of high salt oxidized modified starch waste ...

Micro electrolysis, two-phase anaerobic and aerobic procedures Bacteria extracted in starch ,wastewater, outfall was used for the biochemical procedure after halotolerancy improve-ment in the ,wastewater, with gradually increasing salt concentration. The fluid was removed from the reactor in the middle and into the micro electrolysis reactor from the bottom.

Contact Glow Discharge Electrolysis: A Novel Tool for ...
Contact Glow Discharge Electrolysis: A Novel Tool for ...

27/2/2017, · Dichloromethane (DCM), a widely used solvent for manufacturing various products is present in significant quantities in water bodies due its high water solubility. DCM containing wastewater can harm central nervous system, cause renal and liver dysfunction, liver cancer and lung cancer in humans.

On the electrolysis of dilute chloride solutions ...
On the electrolysis of dilute chloride solutions ...

Sodium ,dichromate, is an essential solution additive for the electrocatalytic production of sodium chlorate, assuring selective hydrogen evolution.

Electrocatalytic performance of PbO films 2 in the ...
Electrocatalytic performance of PbO films 2 in the ...

In this study, during ,electrolysis,, we used COD as an indicator for the presence of dimethoate and its by-products. COD was determined by the ,dichromate, method. The appropriate amount of sample was introduced into a prepared digestion solution (0–1 500 mg·ℓ–1) ,containing, potassium ,dichromate,, sulphuric ,acid, and mercuric sulphate, and the

Electrochemical degradation of the Acid Orange 10 dye on a ...
Electrochemical degradation of the Acid Orange 10 dye on a ...

The COD was determined colorimetrically by the ,dichromate, method. For this purpose, an appropriate amount of the sample was intro-duced into a commercially available digestion solution ,containing, potassium ,dichromate,, sulfuric ,acid,, and mercuric sulfate (HACH LANGE, UK), and the mixture was incubated for 120min at 150oC

HOHFWURFKHPLFDOR[LGDWLRQRQ%''DQRGH
HOHFWURFKHPLFDOR[LGDWLRQRQ%''DQRGH

pseudo-first order model. Remarkably, the ,electrolysis, process is significantly speeded up once chloride is added to the reaction. The complete COD removal was achieved in 60 minutes of treatment. Keywords: Boron-doped diamond electrode, Electrochemical oxidation, Veratric ,acid,, ,wastewater,, Advanced oxidation processes 1. Introduction

Sub-Pilot-Scale Hybrid Electrochemical System for Water ...
Sub-Pilot-Scale Hybrid Electrochemical System for Water ...

Electrolysis, experiments were carried out in a sub-pilot scaled reactor with a volume of 20 L. Schematic diagram of the overall hybrid ,electrolysis, is shown in Figure 7.1. The electrode couple (5 BiOx–TiO2/Ti(0) anodes and 6 SS cathodes) was immersed in 20 L of tap water. NaCl (J.T.Baker) was used as a primary supporting electrolyte in the

Treatment of high salt oxidized modified starch waste ...
Treatment of high salt oxidized modified starch waste ...

Micro ,electrolysis,, two-phase anaerobic and aerobic procedures Bacteria extracted in starch ,wastewater, outfall was used for the biochemical procedure after halotolerancy improve-ment in the ,wastewater, with gradually increasing salt concentration. The fluid was removed from the reactor in the middle and into the micro ,electrolysis, reactor from the bottom.

Electrocatalytic performance of PbO films 2 in the ...
Electrocatalytic performance of PbO films 2 in the ...

In this study, during ,electrolysis,, we used COD as an indicator for the presence of dimethoate and its by-products. COD was determined by the ,dichromate, method. The appropriate amount of sample was introduced into a prepared digestion solution (0–1 500 mg·ℓ–1) ,containing, potassium ,dichromate,, sulphuric ,acid, and mercuric sulphate, and the

CHEMICAL SAFETY REPORT - ECHA
CHEMICAL SAFETY REPORT - ECHA

The sodium ,dichromate containing, liquor is recycled to the ,electrolysis, step. The process is carried out in a closed loop system with very small quantities of sodium ,dichromate, used per tonne of sodium chlorate produced (10-150 g SD/t sodium chlorate; EC, 2007). The only losses of chromium from the process are due to periodic

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