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Treatment site of fracturing flowback fluid

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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Treatment site of fracturing flowback fluid
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).

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

matter have traditionally been used to determine the relative “strength” of a ,wastewater, sample. Today there are four common laboratory tests used to determine the gross amount of organic matter (i.e., concentrations > 1.0 mg/L) in ,waste-water,: 1. BOD (biochemical oxygen demand) - See Page 3. 2. ,COD, (,chemical oxygen demand,) - See Page 5. 3.

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 …

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.

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,.

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,.

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.

Wastewater COD removal using sol-gel immobilized humic acid
Wastewater COD removal using sol-gel immobilized humic acid

humic ,acid, Rafik Helles Department of Chemistry, Alaqsa University, Gaza, Palestine. Accepted March 3, 2010 In this study, humic ,acid, which contains both hydrophobic and hydrophilic moieties is successfully entrapped in sol-gel matrix which is used to reduce the ,chemical oxygen demand, (,COD,) of Gaza ,wastewater,. The method

Chemical aspects of peracetic acid based wastewater ...
Chemical aspects of peracetic acid based wastewater ...

wastewater, effluent within a pilot scale set-up. The following chemical parameters were monitored before and after the disin-fection process: ,chemical oxygen demand, (,COD, Cr), biochemical oxygen demand (BOD 7, ATU), pH, oxidation–reduction potential (ORP) and, finally, residual PAA and hydrogen peroxide concen-trations.

Wastewater COD - Why it is Critical in Wastewater Treatment?
Wastewater COD - Why it is Critical in Wastewater Treatment?

Wastewater COD, (,Chemical Oxygen Demand,) is the amount of oxygen necessary to oxidize the organic carbon completely to CO2 and H2O. Some organic chemicals are not completely oxidized. However, ,COD, is measured in approximately 3 hours via oxidation with potassium dichromate (K2Cr2O7) in the presence of Sulfuric ,Acid, and Silver Sulphate.

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.

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.

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 …

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.

Chemical aspects of peracetic acid based wastewater ...
Chemical aspects of peracetic acid based wastewater ...

wastewater, effluent within a pilot scale set-up. The following chemical parameters were monitored before and after the disin-fection process: ,chemical oxygen demand, (,COD, Cr), biochemical oxygen demand (BOD 7, ATU), pH, oxidation–reduction potential (ORP) and, finally, residual PAA and hydrogen peroxide concen-trations.

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.

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

matter have traditionally been used to determine the relative “strength” of a ,wastewater, sample. Today there are four common laboratory tests used to determine the gross amount of organic matter (i.e., concentrations > 1.0 mg/L) in ,waste-water,: 1. BOD (biochemical oxygen demand) - See Page 3. 2. ,COD, (,chemical oxygen demand,) - See Page 5. 3.

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).

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