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Treatment of acid wastewater by caustic soda

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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Treatment of acid wastewater by caustic soda
Sampling - New Jersey Institute of Technology
Sampling - New Jersey Institute of Technology

The sample is usually acidified with HNO 3 to a pH less than 2, as most nitrates are soluble and excess ,nitrate, ions will prevent precipitation. Other ions such as sulfide, or cyanide, are also preserved by pH control. Samples collected for NH 3 are acidified with sulfuric ,acid, to stabilize the NH 3 as NH 4 SO 4.

Chemical Oxidation - an overview | ScienceDirect Topics
Chemical Oxidation - an overview | ScienceDirect Topics

Chemical oxidation, refers to the use of oxidation reagents such as hydrogen peroxide, chlorine dioxide, and ozone for reduction of residual COD, nonbiodegradable compounds, and trace organic compounds (Bush, 1980; IPIECA, 2010).A typical ,chemical oxidation, system is shown in Fig. 6.14.Utilization of this system is not common in the WWTPs in the petroleum industry (IPIECA, 2010), but it is ...

Wastewater Engineering
Wastewater Engineering

These filamentous bacteria occur in ,iron,-bearing waters and deposit the oxidized ,iron,, Fe(OH) 3, in their sheath. These bacteria are truly ,iron,-accumulating bacteria and thrive in water pipes conveying water containing dissolved ,iron, and form yellow or reddish – colored slimes.

USER DATA PACKAGE UDP-2003-ENV MOBILE NITRITE WASTEWATER …
USER DATA PACKAGE UDP-2003-ENV MOBILE NITRITE WASTEWATER …

sulfamic ,acid, to reduce nitrite to nitrogen gas. The overall ,equation, for this chemical reaction is shown as follows (,equation, I ): NH2SO3H + NaNO2 c> NaHSO4 + H2O * NZ(g) (l) Sulfamic Sodium Monosodium Water Nitrogen ,Acid, Nitrite Sulfate Gas From ,Equation, I it can be seen that this is an acidic reaction and, with waterjet

Glossary of Chemical Terms | Hach
Glossary of Chemical Terms | Hach

in ,wastewater, treatment, a shallow pond where sunlight, bacterial action, and oxygen interact to restore ,wastewater, to a reasonable state of purity. lime any of a family of chemicals consisting essentially of calcium hydroxide made from limestone (calcite) which is composed mostly of calcium carbonate or a mixture of calcium carbonate and magnesium carbonate.

Pilot-scale study on catalytic ozonation of bio-treated ...
Pilot-scale study on catalytic ozonation of bio-treated ...

Firstly, Fe 3+ was generated by the oxidation of waste ,iron, shavings, and played as an effective in situ coagulant, which might cover the effect of PAM. Secondly, the main mechanism for organic ...

NITRATE REMOVAL FROM GROUND WATER – A REVIEW
NITRATE REMOVAL FROM GROUND WATER – A REVIEW

Aluminum reacted with water as per the following ,equation,: 2A1 + 6H 2O → 2Al(OH) 3 + 3H 2 It was shown that 1.16 g of aluminum was required for the reduction of 1 g ,of nitrate,. Catalytic reduction ,of nitrate, with Pd and/Cu catalysts was another removal technique13. It was found that Pd-Cu combined catalysts at a ratio of 4 can maximize

Hydrogen Sulfide Corrosion In Wastewater Collection And ...
Hydrogen Sulfide Corrosion In Wastewater Collection And ...

----- electrical components and computer equipment Hydrogen sulfide corrosion can also compromise structural integrity by corroding equipment (bar screens, conveyors, etc.), pipe and equipment supports, ,wastewater, and sludge storage tanks, and guard rails, walkways, and grating at the treatment plant 1.4 Mechanism of Hydrogen Sulfide Corrosion Hydrogen sulfide corrosion may result from two mechanisms: 1) ,acid, …

Harnessing Peptide Binding to Capture and Reclaim ...
Harnessing Peptide Binding to Capture and Reclaim ...

With rising consumer demands, society is tapping into ,wastewater, as an innovative source to recycle depleting resources. Novel reclamation technologies have been recently explored for this purpose, including several that optimize natural biological processes for targeted reclamation. However, this emerging field has a noticeable dearth of synthetic material technologies that are programmed to ...

Application of Biosorption for Removal of Heavy Metals ...
Application of Biosorption for Removal of Heavy Metals ...

4/12/2017, · Fresh water accounts for 3% of water resources on the Earth. Human and industrial activities produce and discharge wastes containing heavy metals into the water resources making them unavailable and threatening human health and the ecosystem. Conventional methods for the removal of metal ions such as chemical precipitation and membrane filtration are extremely expensive when …

Modification of the Radioactive Wastewater Treatment ...
Modification of the Radioactive Wastewater Treatment ...

nitric ,acid, dose, because during the dilution sodium borate dissociated and sodium hydroxide generated [2] according to the following ,equation,: Na + + B(OH ) ⇔ B(OH ) 3 + Na + + OH − Finishing the ,acid, dose we stirred the solution and the crystals for an additional 30 min- utes. Then we filtered the crystals oand dried them at 96 C for 12 hours.

Electrochemical technologies for wastewater treatment and ...
Electrochemical technologies for wastewater treatment and ...

Electrochemical nitrate, reduction was investigated on coinage (copper, silver and gold) and transition-metal electrodes (platinum, palladium, rhodium, ruthenium, iridium) at 0.1 M ,nitrate, ions ,in acid, solutions. 333 The conclusion was that the rate-determining step on most of these electrodes was the reduction ,of nitrate, to nitrite, based on the values of the Tafel slope, the kinetic order, and the effect …

USE OF ZERO-VALENT IRON FOR WASTEWATER TREATMENT
USE OF ZERO-VALENT IRON FOR WASTEWATER TREATMENT

A use of zero-valent ,iron, (Fe0) as reactive medium for ,wastewater, treatment is one of the most promising techniques because the ,iron, metal is of low-cost, is easy-to-obtain, and has good effectiveness and ability of degrading contaminants. In addition, ,iron, waste particles from industrial filings can be used as a zero-valent ,iron, [2-3]. Reactive

Wastewater and Biosolids Analysis Manual
Wastewater and Biosolids Analysis Manual

The example below describes a calibration for ,iron, in the 0 to 2.4 mg/L range. 1. Prepare a series of five or more ,iron, standard solutions that cover the expected range of ,iron, in the sample. Run the procedure with the standards as described in the step-by-step instructions. 2. Pour the customary volume of each standard solution into

Redox Titration - Chemistry LibreTexts
Redox Titration - Chemistry LibreTexts

Redox Titration Curves. To evaluate a redox titration we need to know the shape of its titration curve. In an ,acid,–base titration or a complexation titration, the titration curve shows how the concentration of H 3 O + (as pH) or M n + (as pM) changes as we add titrant. For a redox titration it is convenient to monitor the titration reaction’s potential instead of the concentration of one ...

Biological and Chemical Wastewater Treatment Processes ...
Biological and Chemical Wastewater Treatment Processes ...

2/12/2014, · When chlorine gas is dissolved in ,wastewater,, it rapidly hydrolyzes to hydrochloric ,acid, (HCl) and hypochlorous ,acid, (HOCl) as shown in the following chemical ,equation,: Cl 2 +H 2 O ↔ H + +Cl - …

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