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extra deep well drilling residue harmless disposal technology ltd stock

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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extra deep well drilling residue harmless disposal technology ltd stock
Reduction of Chemical Oxygen Demand (COD) from Waste Water ...
Reduction of Chemical Oxygen Demand (COD) from Waste Water ...

28/8/2018, · Wastewaters containing organics dramatically contaminate the environment. As an example, ,wastewater, from alcohol manufacturing plant has a ,chemical oxygen demand, (,COD,) as high as 35,000–40,000 mg/1.

Removal of Lignin from Wastewater through Electro-Coagulation
Removal of Lignin from Wastewater through Electro-Coagulation

The present work deals with the ,removal, of lignin (expressed as ,COD removal,) from synthetic ,wastewater through electro coagulation, in a batch reactor using Aluminum as a sacrificial electrode. Effect of various parameters such as current density, pH, NaCl concentration and treatment time on the ,removal, of ,COD, from synthetic ,wastewater, has been investigated to determine the most suitable ...

Anaerobic COD removal - PAQUES
Anaerobic COD removal - PAQUES

Anaerobic ,COD removal,. In anaerobic treatment, bacteria convert organic compounds (,COD,) to biogas in an environment without oxygen. Not only do the bacteria remove contaminating compounds from the effluent, thereby reducing discharge costs, they produce green energy at the same time. Organic components (,COD,) are converted to CH 4 + CO 2 + BIOMASS

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

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

Chemical Industry Wastewater Treatment Using Adsorption
Chemical Industry Wastewater Treatment Using Adsorption

wastewater9 was reduced to less than 0.5 mg/L by passing the ,wastewater, through a three-stage­ adsorbing tank, each stage packed with activated carbon. More than 80 per cent ,COD removal, was obtained from ,wastewater, containing benzene derivatives. carboxylic acids, pesticides. and phenols

Colour and COD Removal from Real Textile Wastewater by ...
Colour and COD Removal from Real Textile Wastewater by ...

In this study, colour and ,chemical oxygen demand, (,COD,) ,removal from real textile wastewater, using diatomite was investigated by varying the contact time, diatomite dosage and particle size. The influence of thermal, ,acid, and alkaline treatments on the performance of natural diatomite was also evaluated. Materials and Methods . Textile ,Wastewater

Colour and COD Removal from Real Textile Wastewater by ...
Colour and COD Removal from Real Textile Wastewater by ...

In this study, colour and ,chemical oxygen demand, (,COD,) ,removal from real textile wastewater, using diatomite was investigated by varying the contact time, diatomite dosage and particle size. The influence of thermal, ,acid, and alkaline treatments on the performance of natural diatomite was also evaluated. Materials and Methods . Textile ,Wastewater

Removal of Formic Acid from Wastewater using Three-Phase ...
Removal of Formic Acid from Wastewater using Three-Phase ...

A new electrochemical reactor, three-phase three-dimensional electrode reactor, was designed and used to investigate theremoval of formic ,acid, from simulated ,wastewater,. The experimental results were assessed in term of ,Chemical OxygenDemand, (,COD,) ,removal, efficiency. The results showed that the three-phase three-dimensional electrodes could effectively removeformic ,acid,. Its ,COD removal, ...

Biological Nutrient Removal manual
Biological Nutrient Removal manual

Sulfuric ,acid, : F₃Cl ... ,Chemical oxygen demand, (,COD,) A test used to measure indirectly organic compounds in water or ,wastewater,. (The advantage of ,COD, over BOD analyses is that ,COD, takes only a matter of ... The process of phosphorus ,removal, in ,wastewater, that relies on the

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

Wastewater Treatment Fact Sheet: External Carbon Sources for Nitrogen Removal,. ... (,COD,) to facilitate nutrient ,removal,. Internal carbon sources refer to organic ... acetic ,acid,, glycerol, molasses sugar water and proprietary formulations like MicroC™, a suite of carbon

Study of COD Removal Rate on a Sequencing Batch Reactor ...
Study of COD Removal Rate on a Sequencing Batch Reactor ...

Pretreatment was done by (1) adjustment of tapioca ,wastewater, pH to control (4.92), 7, and 8, and (2) tapioca ,wastewater, prechlorination at pH 8 during hour using calcium hypochlorite in variation dosages 0, 2, 4, 6 mg/L Cl 2, SBR operation was conducted according to following steps: (1) Filling of pre-treated ,wastewater, into a bioreactor during 1 hour, and (2) aeration of the mixture of ...

Study of COD Removal Rate in Tapioca Wastewater Treatment ...
Study of COD Removal Rate in Tapioca Wastewater Treatment ...

and prechlorination) and aeration time on effluent quality and ,COD removal, rate in tapioca ,wastewater, treatment using SBR. Pretreatment was done by (1) adjustment of tapioca ,wastewater, pH to control (4.92), 7, and 8, and (2) tapioca ,wastewater, prechlorination at pH 8 during hour using calcium hypochlorite in variation dosages 0, 2, 4, 6 mg/L Cl 2

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

----- ,COD, mg/L Bulk Density Ibs/gal. Yield gCOD/g ,COD, Total ,COD,/ N Total dose gal substrate/ IbNOSN Methanol 1,200,000 6,6 0.41 4.82 0.48 Ethanol 1,650,000 6.6 0.55 6.36 0.46 MicroCg™ MicroCglycerin™ 670,000 10.2 0.6 6.45 1.15 1,016,000 9.92 0.55 6.36 0.77 56% Acetic ,Acid, 577,000 9.09 0.53 6.09 1.19 30% Sodium Acetate 222,480 9.8 0.53 6.09 3.09 Table 1: Product Characterization for Some ...

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

----- ,COD, mg/L Bulk Density Ibs/gal. Yield gCOD/g ,COD, Total ,COD,/ N Total dose gal substrate/ IbNOSN Methanol 1,200,000 6,6 0.41 4.82 0.48 Ethanol 1,650,000 6.6 0.55 6.36 0.46 MicroCg™ MicroCglycerin™ 670,000 10.2 0.6 6.45 1.15 1,016,000 9.92 0.55 6.36 0.77 56% Acetic ,Acid, 577,000 9.09 0.53 6.09 1.19 30% Sodium Acetate 222,480 9.8 0.53 6.09 3.09 Table 1: Product Characterization for Some ...

Removal of hard COD nitrogenous compounds and phenols ...
Removal of hard COD nitrogenous compounds and phenols ...

Removal, of hard ,COD,, nitrogenous compounds and phenols from a high-strength coal gasification ,wastewater, stream. E Rava. 1 *, E Chirwa , P Allison. 2, M van Niekerk. 3. and MP Augustyn. 3. 1. University of Pretoria, Water Utilisation Division, 0002, South Africa. 2. Scientific and Technical Consulting Services, P.O. Box 699, Port Alfred 6170 ...

Biological Nutrient Removal manual
Biological Nutrient Removal manual

Sulfuric ,acid, : F₃Cl ... ,Chemical oxygen demand, (,COD,) A test used to measure indirectly organic compounds in water or ,wastewater,. (The advantage of ,COD, over BOD analyses is that ,COD, takes only a matter of ... The process of phosphorus ,removal, in ,wastewater, that relies on the

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