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Removal of nitrate and sulfate from underground 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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Removal of nitrate and sulfate from underground acid wastewater
Battery industry wastewater: Pb removal and produced ...
Battery industry wastewater: Pb removal and produced ...

1/10/1993, · Neutralization with lime and dolomite should be avoided because they produce too much, sludge, at the end of wastewater treatment. Patterson et al. (1977) and Wallace and Singer (1981) suggested that PbCO3 would provide better filtration and denser sludges which are also more easily dewaterable and less compressible than those obtainable using NaOH.

Wine industry wastewater treatment systems
Wine industry wastewater treatment systems

Pretreatment and neutralization. The solids contained in the wastewater are separated in this step as they may hinder the subsequent treatment process as a result of their size. The pH is also adjusted to ensure that the effluent can either be treated or discharged into the public sewer network if the appropriate conditions are met. Primary treatment

Treatment and reuse of coalmine wastewater in Vietnam ...
Treatment and reuse of coalmine wastewater in Vietnam ...

The ,wastewater, was ,first, pumped from an equalization tank into the coagulation tank, where it then flowed to the flocculation tanks (W × L × H: 0.45 m × 0.45 m × 1.0 m) and then onto a lamella clarifier (W × L × H: 0.45 m × 2 m × 1.5 m) for settling. The lime added during the coagulation step helped raise the ,wastewater, pH to 7–8.

Waste management in the Wine Industry - SlideShare
Waste management in the Wine Industry - SlideShare

Reasonable accuracy is needed in order to ensure that (1) the holding-dam is large enough to contain the ,wastewater, and (2) the ,wastewater, irrigation site is of adequate size to accommodate the ,wastewater, volume to be disposed of or, alternatively, (3) that the ,treatment, facilities are of adequate size to treat the ,wastewater, prior to irrigation or disposal.

Design Manual Neutralization Of Acid Mine Drainage
Design Manual Neutralization Of Acid Mine Drainage

Studies on Limestone ,Treatment of Acid, Mine Drainage. Water Pollution Control Research Series, January 1970. 4. Lovell, H.L. An Appraisal of ,Neutralization, Processes to Treat Coal Mine Drainage. EPA 670/2-73-093, November 1973, p. 81. 5. Wilmoth, R.C., and R.D. Hill. ,Neutralization, of High Ferric Iron ,Acid, Mine Drainage.

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

First,, add 250 mL ,wastewater, into the flask, then add the CPAM and stir the mixture by an electronic stirrer at 150 rpm, which was maintained at room temperature. After 10 min of stirring, the mixture was allowed to stand for 1 h, and then the supernatant was taken for characterization.

Waste disposal methods for hydrofluoric acid
Waste disposal methods for hydrofluoric acid

18/3/2011, · If you do not need to treat for fluoride, you can neutralize the ,acid, with caustic, instead. You will get much less sludge. Do a bench scale test ,first, to determine the appropriate dilution factor, if any. If the ,acid, is really strong it may heat up excessively during ,neutralization,, causing the release of HF vapors, and possible damage to equipment.

Battery industry wastewater: Pb removal and produced ...
Battery industry wastewater: Pb removal and produced ...

1/10/1993, · Neutralization with NaOH solution in the presence of Fe(III) of battery manufacturing acid wastewater is the more appropriate treatment process for the removal of soluble Pb, because it allows the exploita- tion of Fe(III), which is often present in the waste- water itself.

Treatment of Effluents of Fertilizer Industry ...
Treatment of Effluents of Fertilizer Industry ...

In the ,treatment, of industrial waste, this ,treatment, may be adopted as a secondary or tertiary ,treatment, where the ammonia nitrogen content of the influent is comparatively nitrogen is desired. The ,treatment, is based on the reaction of ammonia nitrogen with oxygen in aerated pond or lagoon to form nitrites and finally to the nitrate nitrogen form in the presence of a specialized group of nitrifying organisms.

Disposal of Waste | Prudent Practices in the Laboratory ...
Disposal of Waste | Prudent Practices in the Laboratory ...

For example, elementary ,acid,-base ,neutralization, is usually allowed, as is ,treatment, that is the last step of a chemical procedure. ... Approval for such disposal should be requested from the local ,wastewater treatment, works. ... Safety must be ,the first consideration, before undertaking any of …

Treatment of Effluents of Fertilizer Industry ...
Treatment of Effluents of Fertilizer Industry ...

In the ,treatment, of industrial waste, this ,treatment, may be adopted as a secondary or tertiary ,treatment, where the ammonia nitrogen content of the influent is comparatively nitrogen is desired. The ,treatment, is based on the reaction of ammonia nitrogen with oxygen in aerated pond or lagoon to form nitrites and finally to the nitrate nitrogen form in the presence of a specialized group of nitrifying organisms.

Waste disposal methods for hydrofluoric acid
Waste disposal methods for hydrofluoric acid

18/3/2011, · If you do not need to treat for fluoride, you can neutralize the acid with caustic, instead. You will get much less sludge. Do a bench scale test first to determine the appropriate dilution factor, if any. If the acid is really strong it may heat up excessively during neutralization, causing the release of HF vapors, and possible damage to equipment.

(PDF) Flow Equalization and Neutralization | Ramesh Goel ...
(PDF) Flow Equalization and Neutralization | Ramesh Goel ...

NEUTRALIZATIONNeutralization is a common practice in wastewater treatment and waste stabilization. If a waste stream is found to be hazardous because of corrosivity, neutralization is the primary treatment used. Moreover, neutralization is used as a pretreatment system before a variety of biological, chemical, and physical treatment processes.

Sulfuric acid waste recycling by regenerative process ...
Sulfuric acid waste recycling by regenerative process ...

Three main prior art approaches identified by prior art search as suitable for pollution control are: 1) The conversion of waste sulfuric ,acid, to SO 2 by roasting either sulfate salts or heat processing the existing solution, followed by conversion of SO 2 to sulfuric ,acid, in a catalytic sulfuric ,acid, process, 2) Conversion of waste sulfuric ,acid, to ferrous sulfate utilizing scrap iron or ferrous ore with disposal or sale of the ferrous sulfate commercially, and 3) sulfuric ,acid, …

Sulfuric acid waste recycling by regenerative process ...
Sulfuric acid waste recycling by regenerative process ...

Three main prior art approaches identified by prior art search as suitable for pollution control are: 1) The conversion of waste sulfuric ,acid, to SO 2 by roasting either sulfate salts or heat processing the existing solution, followed by conversion of SO 2 to sulfuric ,acid, in a catalytic sulfuric ,acid, process, 2) Conversion of waste sulfuric ,acid, to ferrous sulfate utilizing scrap iron or ...

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