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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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Dephosphorisation of Acidic Wastewater
Dephosphorisation of Acidic Wastewater

Currently lime (CaO) is mixed with the wastewater which creates clean water and sediments, that later need to be landfilled. Due to the high Phosphorus content in the sediments these cannot be recycled back into the production, this result in a loss of important elements. The aim is therefore to remove the Phosphorus to a target level of 1-2 [mg/L].

Alkalinity Adjustments in my Wastewater Treatment Plant ...
Alkalinity Adjustments in my Wastewater Treatment Plant ...

A very common product, also known as hydrated lime or ,CaO, quicklime, lime can be ‘slurry-ized’ through the addition of water to dry lime powder. This slurry can be used to treat ,wastewater, to increase pH and alkalinity and is commonly used in potable water to “soften,” or remove hardness minerals, such as calcium and magnesium from drinking water.

Precipitation Methods Using Calcium-Containing Ores for ...
Precipitation Methods Using Calcium-Containing Ores for ...

form precipitates with fluoride ions after hydrochloric, acid, was added to the, wastewater., As calcite is insoluble in water, fluoride cannot be effectively removed by adding water directly under neutral conditions. A certain amount of, acid, is necessary to dissolve calcite in order to produce Ca2+, which could precipitate fluoride ions. CO2

Enhancing CaO 2 fenton-like process by Fe(II)-oxalic acid ...
Enhancing CaO 2 fenton-like process by Fe(II)-oxalic acid ...

15/10/2019, · The following conclusions can be attained: (1) the MO degradation in the Fe 2+ /OA/,CaO, 2 modified Fenton system achieved 99% within 15 min, meanwhile the mineralization reached 38% after 180 min under the optimized addition of Fe 2+: OA: ,CaO, 2 (Fe 2+ = 1.5 mM, 1: 2: 2); (2) HO •, O 2 − · and 1 O 2 were confirmed as the dominant reactive species during the coupling process, and the MO …

(PDF) Flow Equalization and Neutralization
(PDF) Flow Equalization and Neutralization

an ,acid, or by ,adding, carbon dioxide. The process of ,adding, carbon dioxide is called recar- bonation and is often practiced in industrial ,wastewater, neutralization.

Removal of boron from wastewater by precipitation of a ...
Removal of boron from wastewater by precipitation of a ...

Preliminary experiments were carried out at various temperatures by, adding to, the, waste, solution different chemicals such as MgO,, CaO,, Ca(OH) 2, MgO +, CaO,, MgSO 4 + NaOH, and MgCO 3 + NaOH. In almost all cases the results were unsatisfactory; boron removal varied between 20 and 50% [ 14 ].

JPWO2002079100A1 - Acid wastewater treatment material and ...
JPWO2002079100A1 - Acid wastewater treatment material and ...

When this ,wastewater, treatment material is brought ,into, contact with an acidic ,wastewater, containing iron ions and sulfate ions, not only can the ,wastewater, be neutralized, but also iron and harmful heavy metals such as arsenic can be removed. In addition, it is easy to treat the ,wastewater, …

A SIMPLE GUIDE TO THE CHEMISTRY SELECTION AND USE OF …
A SIMPLE GUIDE TO THE CHEMISTRY SELECTION AND USE OF …

calcium oxide,, but is mined as limestone (CaCO3) and then heated in kilns to produce quicklime (,CaO,). It can then be slaked, or hydrated, to produce slaked/hydrated lime (Ca(OH)2). It is in the form of quicklime or slaked lime that lime is most commonly used in water and ,wastewater, treatment applications (Water Quality and Treatment, 1990).

Calcium Phosphate Precipitation in Wastewater Treatment
Calcium Phosphate Precipitation in Wastewater Treatment

DEPENDENCE OF pA Ca^PO^ ON pH FOR ,WASTEWATER, EXPERIMENTS OVERALL PHOSPHATE REMOVAL PERFORMANCE In the ,wastewater, tested(which is one with an average alkalinity of 2.4 mM and a typical Ca/Mg mole ratio of approximately 3 to 1), a phosphate removal in excess of 80% was consistently achieved at pH 9.5 with lime doses of, at the most, 2 mM (200 mg/2 as CaC03).

Minerals | Free Full-Text | Precipitation Methods Using ...
Minerals | Free Full-Text | Precipitation Methods Using ...

Generally, chemicals such as CaCl 2 and CaO are added for precipitating fluoride in wastewater. Zeng, Ling, Li, Luo, Sui and Guan [ 20 ] used 0.84 g/L CaCl 2 to precipitate fluoride in synthetic water with 400 mg/L F − , 15.2 mg/L Ca 2+ and 2.16 Mg 2+ , with high fluoride removal of 95.73%.

JPWO2002079100A1 - Acid wastewater treatment material and ...
JPWO2002079100A1 - Acid wastewater treatment material and ...

When this ,wastewater, treatment material is brought ,into, contact with an acidic ,wastewater, containing iron ions and sulfate ions, not only can the ,wastewater, be neutralized, but also iron and harmful heavy metals such as arsenic can be removed. In addition, it is easy to treat the ,wastewater, treatment material after use.

Calcium Phosphate Precipitation in Wastewater Treatment
Calcium Phosphate Precipitation in Wastewater Treatment

DEPENDENCE OF pA Ca^PO^ ON pH FOR ,WASTEWATER, EXPERIMENTS OVERALL PHOSPHATE REMOVAL PERFORMANCE In the ,wastewater, tested(which is one with an average alkalinity of 2.4 mM and a typical Ca/Mg mole ratio of approximately 3 to 1), a phosphate removal in excess of 80% was consistently achieved at pH 9.5 with lime doses of, at the most, 2 mM (200 mg/2 as CaC03).

Weifeng CAO | Associate professor | pHD | Chinese Academy ...
Weifeng CAO | Associate professor | pHD | Chinese Academy ...

Effectively converting carbon dioxide ,into, succinic ,acid, under mild pressure with Actinobacillus succinogenes by an integrated fermentation and membrane separation process Article Jun 2018

EP1447383A1 - Method for reducing COD (chemical oxygen ...
EP1447383A1 - Method for reducing COD (chemical oxygen ...

Techniques for treating, waste, water by adding a valent ion, such as CaO/CaCO 3 , to reduce the chemical oxygen demand (COD) are disclosed. Organic acid intermediates formed from the oxidization of...

Oreščanin V et al. BOAT PRESSURE WASHING WASTEWATER ...
Oreščanin V et al. BOAT PRESSURE WASHING WASTEWATER ...

below national limits with 1 g of ,CaO,, 2.54 mg of Fe3+ in the form of FeCl 3 ×6H 2 O, and the combination of 0.25 g of ,CaO, and 5.08 mg of Fe 3+ per 50 mL of ,wastewater,. Both ,CaO, (1.50 g per 50 mL of ,wastewater,) and FC proved effi cient, but their combination yielded a signifi cantly better performance: 99.41 %,

(PDF) Flow Equalization and Neutralization
(PDF) Flow Equalization and Neutralization

an acid or by adding carbon dioxide. The process of adding carbon dioxide is called recar- bonation and is often practiced in industrial wastewater neutralization.

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

Coalmine ,wastewater, has long been a concern due to its potentially severe adverse environmental impacts, such as soil and water pollution. The wastewaters from coalmines, which are commonly referred to as ,acid, mine drainage (AMD), are formed by the chemical and biochemical reactions in the groundwater exposed to the ore and oxygen.

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