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Experimental device for neutralization and stripping of acid wastewater

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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Experimental device for neutralization and stripping of acid wastewater
The method of disposal of the spent electrolyte solution
The method of disposal of the spent electrolyte solution

The cleaning process is carried out first in the ,anode, chamber of a two-chamber ,electrolysis, cell with a cation-exchange membrane with 5-10 A·h of electricity passing through the solution and rate of circulation of the solution of 1 l/h, then successively in middle chambers of four three-chamber ,electrolysis, cells with cation-exchange and anion-exchange membranes with 30-60, 15-30, 15-30 and ...

The reduction of hexavalent chromium by sulphite in wastewater
The reduction of hexavalent chromium by sulphite in wastewater

for Cr(VI) in ,wastewater under, specific conditions (2.0 < pH initial < 5.0 and [sulphite] = 5 x [Cr(VI)] initial). * To whom all correspondence should be …

Chromium(VI) Reduction by Hydrogen Sulfide in Aqueous ...
Chromium(VI) Reduction by Hydrogen Sulfide in Aqueous ...

Nano-Bio sequential removal of hexavalent ,chromium, using polymer-nZVI composite film and ,sulfate, reducing bacteria ,under, anaerobic ,condition,. Environmental Technology & Innovation 2018 , 9 , 122-133. DOI: 10.1016/j.eti.2017.11.006.

Frontiers | An Overview of Electron Acceptors in Microbial ...
Frontiers | An Overview of Electron Acceptors in Microbial ...

In a study, with a synthetic ,wastewater containing, 200 mg Cr(IV)/L, the maximum power density of 150 mW/m 2 was obtained (0.04 mA/cm 2) and the maximum open circuit voltage was reported as 0.91 V. In this study, low pH was found to have a positive effect on Cr(VI) reduction ( Wang et al., 2008 ).

Applications of Combined Electrocoagulation and ...
Applications of Combined Electrocoagulation and ...

2/10/2017, · In recent years, it is aimed to reuse ,wastewater, to form an economical input and to manage it sustainably without threatening human life and ecosystem. High pollutant removal yield from wastewaters was achieved using electrocoagulation method without adding any chemical coagulant or flocculants, thus reducing the amount of sludge. However, electrocoagulation (EC) is an inefficient …

Electrocoagulation of Waste Water and Treatment of Rice ...
Electrocoagulation of Waste Water and Treatment of Rice ...

nickel zinc and ,chromium, from industrial ,wastewater,. For removal of hexavalent ,chromium, from synthetic ,wastewater, Dermentzis et al., (2011c) used a pair of ,iron, electrodes of size 10cm x 5cm x 0.2cm with effective area of 30 cm. 2. each and interspacing between the electrodes as 1.5 cm. Lakshmanan et al. (2010) used rod-shaped ,iron, anodes (22

Environmental Pollution Control Alternatives: Reducing ...
Environmental Pollution Control Alternatives: Reducing ...

Ferrous sulfate, reduces hexavalent, chromium, according to the following equation: 3Fe +2 Cr+3 The use of iron in this form adds considerably to the volume of sludge produced by the treatment system. This method is rarely used except where an effluent of high, chromium, content is located close to a cheap and abundant source of ferrous salts, such as waste pickle liquor from a steel mill.

Electrochemical Techniques in Textile Processes and ...
Electrochemical Techniques in Textile Processes and ...

Lopes et al. [] compared three different ,anode, materials: ,iron,, conducting polymer (Polypyrrole- (Ppy- ) doped with ,chromium, in wool textile), and boron doped diamond (BDD) electrode applied to degradation of a direct dye (Direct Red 80).With all of them, 99% of dye degradation was obtained, but BDD electrode also achieved 87% of COD removal instead of 45–50% achieved with the other ...

Purification And Treatment Of Electroplating Baths And ...
Purification And Treatment Of Electroplating Baths And ...

Abstract: A method and apparatus for enriching the ,chromium, concentration in an operating chrome plating from a spent chrome plating solution ,containing, hexavalent ,chromium,, trivalent ,chromium, and extraneous metal ions is dislosed. A spent platining solution vessel is divided into an ,anode, chamber and a cathode chamber by a porous container. A hollow primary ,anode, is provided in the ,anode, ...

Simultaneous removal of chromium and arsenate from ...
Simultaneous removal of chromium and arsenate from ...

1/3/2011, · The presence of 10 µmol/L arsenate caused more significant, decrease, in No. 3 Simultaneous, removal, of chromium and arsenate from contaminated groundwater by, ferrous sulfate:, Batch uptake behavior 379 chromium, removal, under neutral and alkaline conditions than that, under acidic conditions,, but the, decrease, could be alleviated by increasing Fe(II) dosage.

Treatment of oilfield wastewater by combined process of ...
Treatment of oilfield wastewater by combined process of ...

Oilfield fracturing ,wastewater, is a by-product of various processes in oil and gas production. During the production stage, large amounts of ,wastewater, are generated during hydraulic fracturing to recover oil from deep shale formations (Aguilera 1980; Neghaban et al. 1998; Hickenbottom et al. 2013).This fracturing ,wastewater, contains various impurities solids, heavy …

Methods of Removing Heavy Metals from Industrial Wastewater
Methods of Removing Heavy Metals from Industrial Wastewater

Electrolysis,: Electrolytic recovery is one technology used to remove metals from ,wastewater, streams. This process uses electricity to pass a current through an aqueous metal-bearing solution ,containing, a cathode plate and an insoluble ,anode,. Electricity can be generated by movements of electrons from one element to another.

Water | Free Full-Text | Electrocoagulation in Wastewater ...
Water | Free Full-Text | Electrocoagulation in Wastewater ...

Kongjao et al. determined that ,chromium, and pollutants could be removed within 95% by considering tannery ,wastewater, with a one-step electrocoagulation process. Additional parameters included a pH between 7 and 9, current density of 22.4 A/m 2 , flow of 3.67 L/min, and 20 minute electrolysis time.

Hexavalent Chromium Removal by Reduction with Ferrous ...
Hexavalent Chromium Removal by Reduction with Ferrous ...

The process consisted of the reduction of Cr(VI) to Cr(lll) using ,ferrous sulfate, followed by coagulation and filtration.

Effects on Effluent Quality of Industrial Waste Water ...
Effects on Effluent Quality of Industrial Waste Water ...

10/10/2016, · Coagulation or flocculation process was conducted for the treatment of industrial ,wastewater, to achieve maximum removal of COD, BOD, water sludge, colour and TSS. Aluminum ,sulfate, (alum), ,ferrous sulfate,, ferric chloride and ferric chloro-,sulfate, were commonly used as coagulants. At India there are about one thousand chemical based industries.

Cr(VI) reduction in chromium-contaminated soil by ...
Cr(VI) reduction in chromium-contaminated soil by ...

1/7/2019, · Abstract. Bioremediation plays an increasingly important role in the remediation of ,chromium,-contaminated soil because it is an environmentally friendly technology. To investigate the Cr (VI) reduction process by indigenous microorganisms in soil, a batch of incubation experiments were carried out in a bioreactor ,under, aerobic conditions.

Effects on Effluent Quality of Industrial Waste Water ...
Effects on Effluent Quality of Industrial Waste Water ...

Coagulation or flocculation process was conducted for the treatment of industrial ,wastewater, to achieve maximum removal of COD, BOD, water sludge, colour and TSS. Aluminum ,sulfate, (alum), ,ferrous sulfate,, ferric chloride and ferric chloro-,sulfate, were commonly used as coagulants. At India there are about one thousand chemical based industries.

The Mechanism of the Oxidation of Sulfur(IV) by Chromium ...
The Mechanism of the Oxidation of Sulfur(IV) by Chromium ...

Treatment of Hexavalent ,Chromium, in Chromite Ore Processing Solid Waste Using a Mixed Reductant Solution ,of Ferrous Sulfate, and Sodium Dithionite. Environmental Science & Technology 2005, 39 (16) , 6208-6216. DOI: 10.1021/es050185f. Gábor Lente and, István Fábián.

Electrokinetic Remediation | Geoengineer.org
Electrokinetic Remediation | Geoengineer.org

The ,electrolysis, reactions near the electrodes change the soil pH. ,Acidic, conditions near ,anode, will cause decay and degradation of the electrolyte. There could be stagnant zones between electrodes where the migration is very slow (Sharma and Reddy., 2004).

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