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Degradation of flowback fluid after acid fracturing

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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Degradation of flowback fluid after acid fracturing
Ammonia Wastewater Treatment | Saltworks Techologies
Ammonia Wastewater Treatment | Saltworks Techologies

28/4/2020, · ,Breakpoint Chlorination, Ammonia wastewater is also treatable with chlorine (gas or hypochlorite), with simple equipment., Breakpoint chlorination, is when there is sufficient chlorine to react with all present ammonia. Products include non-toxic chloramines, harmless nitrogen gas, and hydrochloric acid (wastewater becomes acidic).

Chemical oxygen demand fractions of municipal wastewater ...
Chemical oxygen demand fractions of municipal wastewater ...

The assumed influent ,Chemical oxygen demand, (,COD,), N, P fractions can substantially influence the results of simulation-based design such as reactor volumes, solids residence time, effluent quality, oxygen demand, recirculation rates, sludge production, etc. Many publications are available on ,wastewater, characterization, but not a single review

Biochemical Oxygen Demand Analysis | COD Analysis ...
Biochemical Oxygen Demand Analysis | COD Analysis ...

Similarly, ,Chemical Oxygen Demand, (,COD,), is the demand of oxygen required to reduce dichromate (Cr 2 O 7 2-, Cr in 6+ oxidation state) to Cr 3 +. The ,COD, test is more robust than BOD because not all organic matter is readily oxidized by bacteria. Additionally, other chemicals, and inorganic substances in the water can be oxidized by dichromate.

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.

Effect of Ammonia Nitrogen and Dissolved Organic Matter ...
Effect of Ammonia Nitrogen and Dissolved Organic Matter ...

For the first time, ,ammonia nitrogen, (NH 3 N) was found to significantly influence genotoxicity during ,wastewater, chlorination. After chlorination, the genotoxicity decreased in ,wastewater, with a low NH 3 N concentration (<10∼20 mg/L), but it increased notably in ,wastewater, with a …

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.

Catalytic oxidation and spectroscopic analysis of ...
Catalytic oxidation and spectroscopic analysis of ...

The catalyst was used for the catalytic oxidation of simulated ,acid, chrome blue K ,wastewater,. The ,COD, removal efficiency and decolor efficiency by catalytic oxidation are 72.0% and 87.8%, respectively, at the condition of ,wastewater,'s ,COD, is 2,418 mg/L, the optimum pH value is 1.2, the dosage of chlorine dioxide is 1,200 mg/L, the dosage of activated carbon-MnO(2) catalyst is 4 g by reacting ...

The effect of glycerol on readily biodegradable chemical ...
The effect of glycerol on readily biodegradable chemical ...

The ,COD, of ,wastewater, with limited VFA (e.g., 10 mg ,COD,/L) increased up to 2,502 mg ,COD,/L where propionic ,acid, (2,468 mg ,COD,/L) exists as the primary end product with a small quantity of acetic ,acid, (34 mg ,COD,/L). Propionic ,acid, was the main VFA component fermented from the glycerol addition.

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.

WO2015116406A1 - Method of reducing the chemical oxygen ...
WO2015116406A1 - Method of reducing the chemical oxygen ...

Disclosed are methods of ,reducing the chemical oxygen demand, (,COD,) of ,waste water, streams by treating the ,waste water, streams with a concentration of chlorine dioxide generated using a 3-Chemical Method involving sodium chlorite, sodium hypochlorite and an ,acid,. The chlorine dioxide treatment will typically be configured to remove at least 25% of the initial organic content of the ,waste water, ...

DAIRY EFFLUENT | Dairy Processing Handbook
DAIRY EFFLUENT | Dairy Processing Handbook

Chemical oxygen demand, (,COD,) ,COD, indicates the quantity of the pollutants in ,waste water, that can be oxidized by a chemical oxidant. The normal reagents used for this purpose are strongly ,acid, solutions (to ensure complete oxidation) of potassium dichromate or potassium permanganate at high temperature.

Ammonia Nitrogen - wastewater treatment
Ammonia Nitrogen - wastewater treatment

Also, residual ,chlorine, reacts with ,ammonia,. If residual ,chlorine, is present, immediately dechlorinate using sodium thiosulfate. Always neutralize samples with potassium hydroxide or sodium hydroxide before analyses. Prior to ,ammonia, analysis a sample must first be distilled to remove anything that may interfere with the test method.

COD - Elimination by Advanced Oxidation in Wastewater ...
COD - Elimination by Advanced Oxidation in Wastewater ...

COD,-elimination in ,wastewater, by batch treatment Degradation of highly concentrated and recalcitrant ,COD, ind ,wastewater, If ,COD, in concentrated ,wastewater, has to be lowered or specifically changed in chemical charcacter, we recommend the optimized batch …

Biological Treatment of Petrochemical Wastewater | IntechOpen
Biological Treatment of Petrochemical Wastewater | IntechOpen

9/4/2018, · Coagulation-flocculation for specific petrochemical ,wastewater, treatment, such as purified terephthalic ,acid, (PTA) production ,wastewater,; the ,wastewater, contains aromatic compounds such as p-toluic ,acid,, benzoic ,acid,, 4-carboxybenzaldehyde, phthalic ,acid, (PA), and terephthalic ,acid, (TA), etc. Ferric chloride is found to be the most effective coagulant with ,COD, removal efficiency at 75.5% at ...

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.

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 …

Catalytic oxidation and spectroscopic analysis of ...
Catalytic oxidation and spectroscopic analysis of ...

The catalyst was used for the catalytic oxidation of simulated ,acid, chrome blue K ,wastewater,. The ,COD, removal efficiency and decolor efficiency by catalytic oxidation are 72.0% and 87.8%, respectively, at the condition of ,wastewater,'s ,COD, is 2,418 mg/L, the optimum pH value is 1.2, the dosage of chlorine dioxide is 1,200 mg/L, the dosage of activated carbon-MnO(2) catalyst is 4 g by reacting ...

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 …

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