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fracturing flow-back fluids separation treatment process

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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fracturing flow-back fluids separation treatment process
Guide to Chemical Oxygen Demand (COD) Testing
Guide to Chemical Oxygen Demand (COD) Testing

Guide to Chemical Oxygen Demand (COD) Testing. May 2017. Chemical oxygen demand (COD) is a critical waste treatment measurement in everything from municipal systems to food manufacturing waste streams. Performing COD testing the right way is important in determining wastewater treatment effectiveness and can help diagnose any problems in treatment.

Wastewater Training & Troubleshooting-COD vs. BOD
Wastewater Training & Troubleshooting-COD vs. BOD

COD is a chemically chelated/thermal oxidation reaction, and therefore, other reduced substances such as sulfides, sulfites, and ferrous iron will also be oxidized and reported as COD. NH3-N (ammonia) will NOT be oxidized as COD. The use of COD results for wastewater compliance monitoring is increasing.

Difference between Chemical Oxygen Demand (COD) and ...
Difference between Chemical Oxygen Demand (COD) and ...

To determine COD, the sample water is taken in a closed container and incubated with a strong oxidant like potassium dichromate with sulphuric acid under standard conditions of temperature and time. COD is the oxygen demand that is consumed by both inorganic and …

5220 CHEMICAL OXYGEN DEMAND (COD) - Standard Methods …
5220 CHEMICAL OXYGEN DEMAND (COD) - Standard Methods …

COD, is a defined test; the extent of sample oxidation can be affected by digestion time, reagent strength, and sample ,COD, concentration. ,COD, often is used as a measurement of pollutants in ,wastewater, and natural waters. Other related analytical values are biochemical oxygen demand (BOD), total organic carbon (TOC), and total oxygen demand (TOD).

Reducing COD in final effluent | NTS chemicals for industry
Reducing COD in final effluent | NTS chemicals for industry

This treatment is to lower the ,COD, in the effluent of any industry rejecting process water to a ,wastewater, pre-treatment: printing, tannery, electroplating, glass, etc… ,COD, is defined as the quantity of a specified oxidant that reacts with a sample under controlled conditions.

Wastewater Training & Troubleshooting-COD vs. BOD
Wastewater Training & Troubleshooting-COD vs. BOD

COD is a chemically chelated/thermal oxidation reaction, and therefore, other reduced substances such as sulfides, sulfites, and ferrous iron will also be oxidized and reported as COD. NH3-N (ammonia) will NOT be oxidized as COD. The use of COD results for wastewater compliance monitoring is increasing.

CN106630383A - COD (chemical oxygen demand) degradation ...
CN106630383A - COD (chemical oxygen demand) degradation ...

The invention discloses a ,COD, (,chemical oxygen demand,) degradation process for production ,wastewater, of chloronicotinic ,acid,. The process adopts a) a pretreatment system and b) a ,wastewater, treatment system and comprises the following steps: 1, regulating ,wastewater, in a concentrated ,wastewater, regulating reservoir for 24 hours, and introducing the product into a Fenton pool for …

Wastewater quality indicators - Wikipedia
Wastewater quality indicators - Wikipedia

Both the BOD and COD tests are a measure of the relative oxygen-depletion effect of a waste contaminant. Both have been widely adopted as a measure of pollution effect. The BOD test measures the oxygen demand of biodegradable pollutants whereas the COD test measures the oxygen demand of biodegradable pollutants plus the oxygen demand of non-biodegradable oxidizable pollutants.

EFFECT OF ACETIC ACID ON POLLUTANT DECOMPOSITION IN ...
EFFECT OF ACETIC ACID ON POLLUTANT DECOMPOSITION IN ...

For washing wastewater-2 with initial COD of 350 mg O 2/dm 3, the applied doses of acetic acid were 0.4, 0.8, 2.1, 4.2 and 8.3 cm3/dm . The doses of both ferric sulfate and hydrogen peroxide were lower amounting to 1.6 g/dm 3 and 20 cm/dm , respectively. The values of COD in the wastewater before and after the Fenton process are shown in Fig. 2.

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

External supplemental carbon sources are brought into the ,wastewater, treatment process usually as pure compounds or high strength waste materials where concentrations can be as high as 1.5 g/L ,chemical oxygen demand, (,COD,) to facilitate nutrient removal.

Adsorption of COD in Coking Wastewater on Nitric Acid ...
Adsorption of COD in Coking Wastewater on Nitric Acid ...

The optimal nitric acid concentration for modification was 3 mol/L (BAC-N3), which had more acid functional group contents than unmodified. The chemical oxygen demand (COD) removal rate was to reach 77.05% when 4 g BAC-N3 was added into 50 mL coking wastewater in 120 min with a shaking speed of 100 rpm at 25°C.

Converting Chemical Oxygen Demand (COD) of Cellulosic ...
Converting Chemical Oxygen Demand (COD) of Cellulosic ...

27/1/2017, · The wastewater contains high chemical oxygen demand (COD, approximately 125 g/L) and various residual sugars and inhibitor compounds from pretreatment step. A practical solution of wastewater treatment should be found before the commercial production of fuel ethanol from lignocellulose [ 5 ].

Treatment of purified terephthalic acid wastewater using a ...
Treatment of purified terephthalic acid wastewater using a ...

Acid, treatment of this ,wastewater, reduces the ,chemical oxygen demand, (,COD,) load by more than 50%, still leaving substantial ,COD, load (>1500 mg/L) which should be removed. The present study reports on the use of a bio-waste-adsorbent bagasse fly ash (BFA) for the reduction of ,COD, and other recalcitrant acids from this ,wastewater,.

Understanding Laboratory Wastewater Tests: I. ORGANICS ...
Understanding Laboratory Wastewater Tests: I. ORGANICS ...

14/10/2010, · The ,COD, test uses a chemical (potassium dichromate in a 50% sulfuric ,acid, solution) that “oxidizes” both organic (predominate) and inorganic substances in a ,wastewater, sample, which results in a higher ,COD, concentration than BOD concentration for the same ,wastewater, sample since only organic compounds are consumed during BOD testing.

Chemical oxygen demand - Wikipedia
Chemical oxygen demand - Wikipedia

In environmental chemistry, the chemical oxygen demand is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution. It is commonly expressed in mass of oxygen consumed over volume of solution which in SI units is milligrams per litre. A COD test can be used to easily quantify the amount of organics in water. The most common application of COD is in …

Reducing COD in final effluent | NTS chemicals for industry
Reducing COD in final effluent | NTS chemicals for industry

This treatment is to lower the ,COD, in the effluent of any industry rejecting process water to a ,wastewater, pre-treatment: printing, tannery, electroplating, glass, etc… ,COD, is defined as the quantity of a specified oxidant that reacts with a sample under controlled conditions.

Calculating acetate concentrations in artificial wastewater?
Calculating acetate concentrations in artificial wastewater?

Also 1mg/L concentration of CH3COO = 1.066 mg/L COD of CH3COO. Secondly, acetate is an easily consumed carbon source, I myself use it. Microbes consumes acetate whether aerobic or anaerobic alike.

Wastewater quality indicators - Wikipedia
Wastewater quality indicators - Wikipedia

Both the BOD and ,COD, tests are a measure of the relative oxygen-depletion effect of a waste contaminant. Both have been widely adopted as a measure of pollution effect. The BOD test measures the oxygen demand of biodegradable pollutants whereas the ,COD, test measures the oxygen demand of biodegradable pollutants plus the oxygen demand of non-biodegradable oxidizable pollutants.

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