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Acid ammonia nitrogen 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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Acid ammonia nitrogen wastewater
Disposal of high-arsenic waste acid by the stepwise ...
Disposal of high-arsenic waste acid by the stepwise ...

Treatment of high-arsenic waste acid The treatments of high-arsenic waste acid are composed of three stages including, calcium carbonate neutralization (,Stage-I), scorodite synthesis (Stage-II) and high-efficiency purification (Stage-III), as shown in Fig. 1.

SAFETY ISSUES IN THE TREATMENT PLANT
SAFETY ISSUES IN THE TREATMENT PLANT

Chlorine, and chloramine can both form hazardous compounds with hydrocarbons, such as carbon tetrachloride and chloroform. Chloramine is formed by the reaction of ,chlorine, with ammonia. Dangerous reactions can occur between various treatment chemicals. These reactions may release large amounts of heat energy, resulting in fire or explosion.

Dynamic desorption of arsenic from polymer-supported ...
Dynamic desorption of arsenic from polymer-supported ...

For wastewater with high concentration of arsenic, the most popular treatment process is precipitation with sulfide or ferrous salt (Fendorf et al. 2010; Onstott et al. 2011). The residual arsenic concentration of effluent from precipitation normally ranges from 0.1 to 0.5 mg L −1 .

Disposal of high-arsenic waste acid by the stepwise ...
Disposal of high-arsenic waste acid by the stepwise ...

Neutralization and sulfurization processes are typical processes to treat the high-arsenic waste acid. 1,3 In neutralization process, arsenic in the waste acid is transformed into solid hazardous waste composed of calcium arsenate/arsenite, gypsum and other compounds by using Ca-containing compounds (CaO, Ca(OH) 2 and CaCO 3) as precipitators. 8 When sulfides (Na 2 S and H 2 S) are used to precipitate …

The method of extracting arsenic from solutions
The method of extracting arsenic from solutions

The ,solution containing, arsenite and/or arsenate ions in contact with granulated with binder perchlorovinyl-hydroxide of titanium, calcined phosphate ion form at a molar ratio of P(V) Ti(IV) (0,7-1,4):1, then regenerate the sorbent at an elevated temperature with a ,solution containing, sulfuric ,acid,, then transferred ,arsenic, in the solid phase by treatment of the eluate sulphide-,containing, ...

KnowPulp - Bleaching - general
KnowPulp - Bleaching - general

With only ,alkaline, or ,acidic, stages the target brightness would not be attained, ... When the transition was made to recycle bleach plant filtrates in order to reduce bleach plant ,wastewater, effluent, ... Active ,chlorine,; Charges of ,chlorine,-,containing, chemicals are generally expressed in kilos of ”active ,chlorine,” per tonne of pulp.

Significance of bio-treatment by acid washing for ...
Significance of bio-treatment by acid washing for ...

ppm) in 100 ml conical flask ,containing, 10 ml of the ,arsenic solution, before and after ,acid, washing. All tests were done in triplicate. The biomass was removed from the mixture by centrifugation for 15 min at 10000 rpm and 4 °C. The ,Arsenic, remaining in the ,solution, was examined. RESULTS AND DISCUSSION profile

A Novel Recovery Method for Treating Wastewater Containing ...
A Novel Recovery Method for Treating Wastewater Containing ...

A new treatment method for, wastewater containing, concentrated fluoride and fluoroborate ions by, hydrothermal, treatment were developed. The treatment is an earth-mimetic method to produce natural...

Alternative Method for the Treatment of Hydrometallurgical ...
Alternative Method for the Treatment of Hydrometallurgical ...

In this study, an alternative treatment method for ACRs via the immobilization of As as scorodite was proposed with the use of two types of ACRs (ACRreal directly collected from a Pb refinery and ACRlab precipitated from waste sulfuric ,acid, in the lab). The treatment of ACR included preparing the As-enriched ,solution, via H2SO4 dissolution–neutralization of ACR at pH < 2, As(III) was oxidized by H2O2, and …

Comprehensive treatment of acid effluent containing ...
Comprehensive treatment of acid effluent containing ...

1/8/2020, · Therefore, the acid effluent must be retreated for comprehensive utilization and pollution, abatement., In relevant researches, arsenic in solution is usually separated and enriched by crystallization, adsorption, reduction or precipitation (Yinglin et al., 2012; Ciardelli et al., 2008; Sun et al., 2011; Pena et al., 2005; Chuang et al., 2005).

Adsorption of As(V) from aqueous solution by chemically ...
Adsorption of As(V) from aqueous solution by chemically ...

manganese dioxide coated sand22, ,acid, treated spent bleaching earth23 and peanut shell24. Treatment ,of arsenic containing wastewater, by activated carbon has been reported as effective technique for the removal ,of arsenic, species25. ,Arsenic, adsorption has been investigated with Fe-treated activated carbon26, activated carbon

Wastewater Treatment through Low Cost Adsorption ...
Wastewater Treatment through Low Cost Adsorption ...

7/4/2016, · In this case, counterions with lower K ps values are used, for instance sulphide ions (S 2 −) are used to improve the, wastewater treatment of waters containing, mercury or cadmium. Most of the treatments employed in our country only consider a alkaline chemical, treatment, by contacting the, acidic, stream with CaCO 3 or CaO or Ca ( OH ) 2 raising the pH up to a point where metals are partially …

Adsorption of As(V) from aqueous solution by chemically ...
Adsorption of As(V) from aqueous solution by chemically ...

manganese dioxide coated sand22, acid treated spent bleaching earth23 and peanut shell24. Treatment of arsenic containing wastewater by activated carbon has been reported as effective technique for the removal of arsenic species25. Arsenic adsorption has been investigated with Fe-treated activated carbon26, activated carbon

The Interaction of Hydrogen Peroxide and Hypochlorous Acid ...
The Interaction of Hydrogen Peroxide and Hypochlorous Acid ...

The Interaction of ,Hydrogen Peroxide, and Hypochlorous Acid in ,Acidic, Solutions ,Containing, Chloride Ion Robert E. Connick Cite this: J. Am. Chem. Soc. 1947 , 69 , 6 , 1509–1514

Treatment of arsenic-containing solutions using chitosan ...
Treatment of arsenic-containing solutions using chitosan ...

1/9/2002, · In arsenic wastewater treatment processes, As(III) is usually more difficult to remove than As(V). As(III) removal can be improved by oxidizing it, using sophisticated processes such as photo-oxidation in presence of ferric ions or more conventional oxidizing reagents such as, potassium permanganate, or, hydrogen peroxide, .

The synthesis of calcium arsenate@iron arsenate coating ...
The synthesis of calcium arsenate@iron arsenate coating ...

The current method of treating arsenic-containing wastewater is mainly to use a calcium method to synthesize stable, calcium arsenate,. It is easy to cause reverse dissolution by rain or other erosion, releasing arsenic into the natural world and polluting soil and groundwater.

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