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Under acidic condition

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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Under acidic condition
(PDF) Removal of Antibiotics from a Model Wastewater by RO ...
(PDF) Removal of Antibiotics from a Model Wastewater by RO ...

Removal of antibiotics by reverse osmosis/nanofiltration (RO/NF) from a model wastewater of a manufacturing plant producing pharmaceuticals for veterinary use was investigated. The rejection of …

Treatment of Fumaric Acid Wastewater Using Integrated ...
Treatment of Fumaric Acid Wastewater Using Integrated ...

Filtration performance and fouling of nanofiltration (NF) and reverse osmosis (RO) membranes in the treatment of dairy industry wastewater were investigated. Two series of experiments were...

Reverse Osmosis Chemicals | RO Membrane Systems
Reverse Osmosis Chemicals | RO Membrane Systems

Membrane, cleaner: ,RO, Sequestrant to remove calcium sulphate fouling: Accepta 2069: ,Membrane, cleaner: ,RO, Low foaming detergent for removing organic matter: Accepta 2628: Acidic ,membrane, cleaner: Ammoniated citric ,acid, cleaner for scale and iron removal: Accepta 2040: Alkaline ,membrane, …

reaction between calcium phosphide with water
reaction between calcium phosphide with water

Rivers generally contain 1-2 ppm calcium, but in ,lime, areas rivers may contains calcium concentrations as high as 100 ppm. Writing calcium hydroxide + phosphoric ,acid, yield calcium phosphate + water in chemical ,equation, would be, #Ca(OH)_2 + H_3PO_4 -> Ca_3(PO_4)_2 + H_2O# but it …

Reverse Osmosis Chemicals | RO Membrane Systems
Reverse Osmosis Chemicals | RO Membrane Systems

Membrane, cleaner: ,RO, Sequestrant to remove calcium sulphate fouling: Accepta 2069: ,Membrane, cleaner: ,RO, Low foaming detergent for removing organic matter: Accepta 2628: Acidic ,membrane, cleaner: Ammoniated citric ,acid, cleaner for scale and iron removal: Accepta 2040: Alkaline ,membrane, …

MEMBRANE BIOREACTORS FOR RO PRETREATMENT
MEMBRANE BIOREACTORS FOR RO PRETREATMENT

Membrane Bioreactor as RO Pretreatment A further development over ultrafiltration is a membrane bioreactor (MBR). Instead of separating the biological treatment process and the ultrafiltration step, the latest wastewater treatment plants combine both processes in …

Nanofiltration and Reverse Osmosis - Water Treatment and ...
Nanofiltration and Reverse Osmosis - Water Treatment and ...

Next to pre-,treatment, one can perform a chemical dosage (,acid,, anti-scalent), to prevent scaling and precipitation of insoluble solids, such as calcium carbonate and barium sulphate on the ,membrane, surface. The applied acids are hydrochloric ,acid, (HCl) and sulphuric ,acid, (H 2 SO 4). Sulphuric ,acid, is the most widely used chemical for this purpose.

Reverse osmosis membrane treatment of acidic etchant ...
Reverse osmosis membrane treatment of acidic etchant ...

5/3/2008, · Abstract. The removal of nitrate from mixed, acid, etchant (MAE), wastewater, was investigated by neutralization, followed by reverse osmosis (,RO) membrane, filtration. The coating of a, RO membrane, was conducted using polyacrylic acid (PAA) in order to enhance the removal of nitrate from the MAE, wastewater.

Advanced treatment of semiconductor wastewater by combined ...
Advanced treatment of semiconductor wastewater by combined ...

3/3/2014, · In the treatment of industrial wastewaters (including the semiconductor wastewater) by, MBR–RO, technology, however, the fouling characteristics of RO membranes were seldom investigated. In this work, the combined, MBR–RO, technology will be applied to treat the semiconductor wastewater for water reclamation and reuse.

Activated sludge process - SlideShare
Activated sludge process - SlideShare

Actual Oxygen Transfer Rate or Efficiency β is salinity – surface tension factor • Taken as saturation DO ratio of ,wastewater, to clean water • Typical value is 0.92 to 0.98 (0.95 is commonly used) α is oxygen transfer correction factor for the ,wastewater, • Typical range for diffused aeration systems is 0.4-0.8 • Typical range for mechanical aerators is 0.6-1.2 F is fouling factor ...

Acid and Metalliferous Drainage–A Global Environmental Issue
Acid and Metalliferous Drainage–A Global Environmental Issue

Acid, and Metalliferous Drainage (AMD) is a critical environmental problem worldwide. It occurs when sulfide minerals, primarily pyrite, oxidise chemically or biologically to produce acidic ,wastewater, containing elevated concentrations of sulfate and toxic elements.

Operational Performance and Optimization of RO Wastewater ...
Operational Performance and Optimization of RO Wastewater ...

There has been a rapid growth in the use of, RO membranes, for, wastewater, reclamation. The membrane process offers high removal rates for many contaminants and pollutants, as well as operating at low energy consumption. It is very important that these commercial wastewater treatment plants operate consistently to minimize down-time

JP2013123673A - Treatment method for hydrofluoric acid ...
JP2013123673A - Treatment method for hydrofluoric acid ...

And a hydrofluoric ,acid wastewater treatment, method comprising a ,membrane, separation step for separating the silicon into non-permeated water enriched with silicon. In the ,membrane, separation step, water is preferably passed through the ,membrane, separation device 20 without adding an alkaline component to the hydrofluoric ,acid waste water,.

Rigorous simulation of Reverse Osmosis (RO) membrane ...
Rigorous simulation of Reverse Osmosis (RO) membrane ...

A ,RO membrane, system includes a set of ,RO membrane, elements connected sequentially in series format and housed in a pressure vessel. The arrangement of the ,RO, system can be single or double pass with the specific geometry of the pressure vessel arrangement described in stages, while the specifics of pressure vessels arrangement inside a stage is called an array.

Treatment of Fumaric Acid Wastewater Using Integrated ...
Treatment of Fumaric Acid Wastewater Using Integrated ...

In this paper, the integrated process of series connected, hollow-fiber, supported liquid, membrane-strip dispersion, (HFSLM-SD) with reverse osmosis (RO) was designed and used to recover fumaric acid (FA) from waste effluents and treat FA wastewater.

Nanofiltration and Reverse Osmosis - Water Treatment and ...
Nanofiltration and Reverse Osmosis - Water Treatment and ...

Next to pre-treatment one can perform a chemical dosage (,acid,, anti-scalent), to prevent scaling and precipitation of insoluble solids, such as calcium carbonate and barium sulphate on the ,membrane, surface. The applied acids are hydrochloric ,acid, (HCl) and sulphuric ,acid, (H 2 SO 4). Sulphuric ,acid, is the most widely used chemical for this purpose.

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