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Mobile Crushing and Screening Plant

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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Mobile Crushing and Screening Plant
4 Methane production by anaerobic digestion of wastewater ...
4 Methane production by anaerobic digestion of wastewater ...

The Chemical Oxygen Demand, (,COD,) is used to quantify the amount of organic matter in waste streams and predict the potential for biogas pro-duction. The oxygen equivalent of organic matter that can be oxidised, is measured using a strong chemical oxidising agent in an acidic medium. During anaerobic digestion the biodegradable

Effect of formic acid on pollutant decomposition in ...
Effect of formic acid on pollutant decomposition in ...

effect of formic ,acid, on treatment efficiency for different types of textile ,wastewater, tested, ,COD, reduction in mixtures of ,wastewater, and formic ,acid, was calculated. The values of ,COD, calculated were then compared with ,COD, values obtained experimentally during the oxidation of samples of ,wastewater,-formic ,acid, mixtures in the Fenton process.

Effect of Ammonia on COD Analysis
Effect of Ammonia on COD Analysis

KEYWORDS: ,chemical oxygen demand,, ammonia, chloride, measurement, interference. ,Chemical oxygen demand, (,COD,) is used as a measure of the organic content of ,wastewater,.1,2 ,COD, is measured through oxidation of organics by a boiling mixture of po tassium dichromate and sulfuric ,acid, and through deter mination of the amount of dichromate reduced during

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).

Production of high-concentration n -caproic acid from ...
Production of high-concentration n -caproic acid from ...

21/4/2017, · n-Caproic ,acid, (CA), as a medium-chain carboxylic ,acid,, is a valuable chemical feedstock for various industrial applications. The fermentative production of CA from renewable carbon sources has attracted a lot of attentions. Lactate is a significant intermediate waste in the anaerobic breakdown of carbohydrates that comprise 18–70% of ,the chemical oxygen demand, (,COD,) in municipal and some ...

Wastewater - Wikipedia
Wastewater - Wikipedia

Wastewater, is any water that has been contaminated by human use. ,Wastewater, is "used water from any combination of domestic, industrial, commercial or agricultural activities, surface runoff or stormwater, and any sewer inflow or sewer infiltration". Therefore, ,wastewater, is a byproduct of domestic, industrial, commercial or agricultural activities.

Guide to Chemical Oxygen Demand (COD) Testing
Guide to Chemical Oxygen Demand (COD) Testing

Importance of ,Chemical Oxygen Demand,. As gauges of organic matter in a sample, BOD and ,COD, are critical in ,wastewater, for determining the amount of waste in the water. Waste that's ,high, in organic matter requires treatment to reduce the amount of organic waste before discharging into …

4 Methane production by anaerobic digestion of wastewater ...
4 Methane production by anaerobic digestion of wastewater ...

The Chemical Oxygen Demand, (,COD,) is used to quantify the amount of organic matter in waste streams and predict the potential for biogas pro-duction. The oxygen equivalent of organic matter that can be oxidised, is measured using a strong chemical oxidising agent in an acidic medium. During anaerobic digestion the biodegradable

Effect of formic acid on pollutant decomposition in ...
Effect of formic acid on pollutant decomposition in ...

effect of formic ,acid, on treatment efficiency for different types of textile ,wastewater, tested, ,COD, reduction in mixtures of ,wastewater, and formic ,acid, was calculated. The values of ,COD, calculated were then compared with ,COD, values obtained experimentally during the oxidation of samples of ,wastewater,-formic ,acid, mixtures in the Fenton process.

Refined soybean oil wastewater treatment and its ...
Refined soybean oil wastewater treatment and its ...

1/11/2018, · The refined soybean oil wastewater (RSOW) has a high concentration of chemical oxygen demand (COD) and contains large amounts of sodium salts from free fatty acids soap stocks, oil, grease, sulfates, and phosphates . The harmful effluent discarded in its raw form causes substantial impacts on the environment.

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).

Effect of Ammonia on COD Analysis
Effect of Ammonia on COD Analysis

KEYWORDS: ,chemical oxygen demand,, ammonia, chloride, measurement, interference. ,Chemical oxygen demand, (,COD,) is used as a measure of the organic content of ,wastewater,.1,2 ,COD, is measured through oxidation of organics by a boiling mixture of po tassium dichromate and sulfuric ,acid, and through deter mination of the amount of dichromate reduced during

Guide to Chemical Oxygen Demand (COD) Testing
Guide to Chemical Oxygen Demand (COD) Testing

Importance of ,Chemical Oxygen Demand,. As gauges of organic matter in a sample, BOD and ,COD, are critical in ,wastewater, for determining the amount of waste in the water. Waste that's ,high, in organic matter requires treatment to reduce the amount of organic waste before discharging into …

Effect of Ammonia on COD Analysis
Effect of Ammonia on COD Analysis

KEYWORDS: ,chemical oxygen demand,, ammonia, chloride, measurement, interference. ,Chemical oxygen demand, (,COD,) is used as a measure of the organic content of ,wastewater,.1,2 ,COD, is measured through oxidation of organics by a boiling mixture of po tassium dichromate and sulfuric ,acid, and through deter mination of the amount of dichromate reduced during

Removal of surfactant from industrial wastewaters by ...
Removal of surfactant from industrial wastewaters by ...

wastewater, and the pH of the mixture is then adjusted with sodium hydroxide and sulphuric ,acid,. The effects of pH on turbidity and ,COD, removal from jar tests for coagulation of ,wastewater, using ferric chloride are shown in Fig. 1. It can be seen that turbidity and ,COD, removals are most effective at a pH range between 7 and 9. The rate

Highly efficient treatment of terephthalic acid wastewater ...
Highly efficient treatment of terephthalic acid wastewater ...

organic components of purified terephthalic ,acid, (PTA) manufacturing ,wastewater, [1,2], considered toxic and an endocrine disruptor [2,3]. ,Wastewater, from the manufac-ture of PTA includes ,high, concentrations of acetic ,acid,, functioning as a solvent, as a contaminant, and in addition contains benzoic ,acid, (BA), p-toluic ,acid,, phthalic ,acid,, and

Effect of formic acid on pollutant decomposition in ...
Effect of formic acid on pollutant decomposition in ...

effect of formic ,acid, on treatment efficiency for different types of textile ,wastewater, tested, ,COD, reduction in mixtures of ,wastewater, and formic ,acid, was calculated. The values of ,COD, calculated were then compared with ,COD, values obtained experimentally during the oxidation of samples of ,wastewater,-formic ,acid, mixtures in the Fenton process.

Difference Between BOD and COD | Definition Test Method ...
Difference Between BOD and COD | Definition Test Method ...

7/6/2017, · ,COD, measurements are commonly made with the samples of ,wastewater, or natural water, which are contaminated by domestic and industrial wastes. A closed water sample is incubated with a strong oxidant like potassium dichromate (K 2 Cr 2 O 7 ) in combination with boiling sulfuric ,acid, (H 2 SO 4 ) under a specific temperature for a specified period of time.

Difference Between BOD and COD | Definition Test Method ...
Difference Between BOD and COD | Definition Test Method ...

7/6/2017, · ,COD, measurements are commonly made with the samples of ,wastewater, or natural water, which are contaminated by domestic and industrial wastes. A closed water sample is incubated with a strong oxidant like potassium dichromate (K 2 Cr 2 O 7 ) in combination with boiling sulfuric ,acid, (H 2 SO 4 ) under a specific temperature for a specified period of time.

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