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Interference of COD determination in 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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Interference of COD determination in acid wastewater
Sodium Hydrosulphite - an overview | ScienceDirect Topics
Sodium Hydrosulphite - an overview | ScienceDirect Topics

A. Khatri, M. White, in Sustainable Apparel, 2015 5.5.2 Dyeing of cotton with vat and sulfur dyes. Sulfur and vat dyes are insoluble in water. They are chemically reduced using sodium ,sulfide, or sodium hydrosulfite to produce their water soluble “leuco” form before application (Gohl and Vilensky, 1983).Once soluble, the dyes are applied to cotton in a way similar to dyeing with anionic dyes.

Detection Control and Correction of Hydrogen Sulfide ...
Detection Control and Correction of Hydrogen Sulfide ...

Sulfide can still be produced within the slime layer, but if dissolved oxygen is present, sulfide will be oxidized as it passes into an aerobic environment If dissolved oxygen is not present, dissolved sulfide will enter the bulk wastewater where it can be present as dissolved hydrogen sulfide gas (H2S).

Detailed Modeling of Kraft Pulping Chemistry ...
Detailed Modeling of Kraft Pulping Chemistry ...

Addnl., at high ,alkali, compared to moderate ,alkali, concn., lower amts. of low mol. wt. carboxylic acids originating from the degrdn. of carbohydrates were detected in spent black ,liquor,. The presence of AQ provided significant hemicellulose stabilization against endwise degrdn. reactions, being more pronounced at moderate 0.50 M concn. than at 1.55 M hydroxyl ion concn.

Detailed Modeling of Kraft Pulping Chemistry ...
Detailed Modeling of Kraft Pulping Chemistry ...

Addnl., at high ,alkali, compared to moderate ,alkali, concn., lower amts. of low mol. wt. carboxylic acids originating from the degrdn. of carbohydrates were detected in spent black ,liquor,. The presence of AQ provided significant hemicellulose stabilization against endwise degrdn. reactions, being more pronounced at moderate 0.50 M concn. than at 1.55 M hydroxyl ion concn.

Device for recovering sodium chemicals from green liquor ...
Device for recovering sodium chemicals from green liquor ...

The invention relates to a method ,for recovering sodium chemicals from green liquor, by precarbonating green ,liquor, by means of flue gases, by bringing a precarbonated solution into contact with a sodium bicarbonate solution and by stripping hydrogen sulphide from the so obtained ,reaction, mixture by means of steam, for producing hydrogen sulphide gas and a sodium carbonate solution, which ...

Wastewater treatment and reclamation: A review of pulp and ...
Wastewater treatment and reclamation: A review of pulp and ...

Particular value-added products, such as vanillin and syringaldehyde, were identified in the electro-oxidized ,reaction, media of ,acid, bisulfite pulping effluents (Moodley et al. 2011). Dominguez-Ramos et al. (2008) obtained positive results for the treatment of lignosulfonate, which may be regarded as a component of effluent from sulfite pulping.

Emerson Liquid Analytical Solutions
Emerson Liquid Analytical Solutions

Wastewater, Treatment ,Wastewater, is generated by homes, businesses, and industries and is treated in two major steps, primary and secondary treatment, with disposal of solids during both steps. Analytical measurements such as pH and ORP are performed during the primary treatment stage in order to monitor the removal of solids from the ,wastewater,.

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

HYDROGEN-ION CONCENTRATION DISCUSSION The ,acid, or ,alkali, intensity, hydrogen-ion concentration, of a solution is found by determining the pH. Ions are electrically charged atoms or groups of atoms. When ,acid, base or salt is dissolved in a suitable solvent the molecules dissociate into smaller units, some of which have a positive electric charge and others are equal negative charge.

Operational Considerations When Burning Higher-Chlorine Coal
Operational Considerations When Burning Higher-Chlorine Coal

1/2/2015, · Please contact clientservices@accessintel.com or call 888-707-5814 (M – Th 9 am – 5:30 pm and F 9 am – 3 pm. ET) , to start a free trial, get pricing information, order a reprint, or post an ...

Lignin recovery from spent alkaline pulping liquors using ...
Lignin recovery from spent alkaline pulping liquors using ...

The reduction in CO2 consumption can be explained by the fact that oxidation ,of sulfide, to sulfate and organics (e.g. sugars) to organic acids (e.g. sugar acids) consumes residual ,alkali, in black ,liquor,. The reduction in sulfuric ,acid, consumption can be explained by the improved dewatering of the cake that occurs during lignin slurry filtration.

Recent Development in Ammonia Stripping Process for ...
Recent Development in Ammonia Stripping Process for ...

The system also comprised of a heater to heat the wastewater at 38°C and ammonia recovery via absorption with sulphuric acid. Lastly, the effluent was neutralized after adding sulphuric acid. As a result, they found that the ammonia stripping system for groundwater polluted with leachate displayed removal efficiency of 95.4% with initial ammonia concentration at 199.0 mg/L.

Power and Cogeneration Water and Wastewater Treatment ...
Power and Cogeneration Water and Wastewater Treatment ...

Dual ,Alkali, Scrubber System Dual ,Alkali, Scrubber ,Wastewater, Treatment. Sulfur in the coal is converted to sulfur dioxide (SO2) when the coal is burned. If the SO2 is left in the stack gas, it will react with water in the air to form sulfuric ,acid,. This ,acid, is the main cause of ,acid, rain.

HJ 2051-2016 PDF. - Chinese Standard
HJ 2051-2016 PDF. - Chinese Standard

The ,acid, and ,alkali waste water, produced by the ,reaction, unit, ... ,sulfide, and phosphide and so on. J) Polyvinyl chloride centrifuged mother ,liquor, ... Regulating pool ,reaction, pool active chlorine ,wastewater, discharge standards Or reuse Nickel - containing ,wastewater

Kraft process - Wikipedia
Kraft process - Wikipedia

The ,kraft process, (also known as kraft pulping or sulfate process) is a process for conversion of wood into wood pulp, which consists of almost pure cellulose fibers, the main component of paper.The ,kraft process, entails treatment of wood chips with a hot mixture of water, sodium hydroxide (NaOH), and sodium ,sulfide, (Na 2 S), known as white ,liquor,, that breaks the bonds that link lignin ...

HJ 2051-2016 PDF. - Chinese Standard
HJ 2051-2016 PDF. - Chinese Standard

The ,acid, and ,alkali waste water, produced by the ,reaction, unit, ... ,sulfide, and phosphide and so on. J) Polyvinyl chloride centrifuged mother ,liquor, ... Regulating pool ,reaction, pool active chlorine ,wastewater, discharge standards Or reuse Nickel - containing ,wastewater

Operational Considerations When Burning Higher-Chlorine Coal
Operational Considerations When Burning Higher-Chlorine Coal

1/2/2015, · Please contact clientservices@accessintel.com or call 888-707-5814 (M – Th 9 am – 5:30 pm and F 9 am – 3 pm. ET) , to start a free trial, get pricing information, order a reprint, or post an ...

Removal of sulfur compounds from wastewater - Nederlandse ...
Removal of sulfur compounds from wastewater - Nederlandse ...

The invention relates to a process for removal of sulfur compounds from wastewater, which process provides recovery of elemental sulfur. The process is carried out in two separate anaerobic reactors. In the first reactor organic compounds are converted to acid compounds and sulfur compounds are converted to sulfide compounds.

Wastewater Characterization - Hazardous Wastes
Wastewater Characterization - Hazardous Wastes

Wastewater, treatment in the copper sulfate industry can further be improved, particularly the removal of the toxic metals, through ,sulfide, precipitation, ion exchange, and xanthate processes. Addition of ferric chloride alongside alkaline precipitation can improve the removal of arsenic in the ,wastewater,. 22.3.5 Hydrofluoric ,Acid

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