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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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Acid Gas Scrubbers and Calcium: Solutions
Acid Gas Scrubbers and Calcium: Solutions

For situations where ,calcium carbonate, is the primary scale, you can decrease the pH of the scrubber. ,Acid, gas ,removal, efficiency decreases when operating at a lower pH, but the drop in efficiency can be overcome by increasing the packing height (and thus the number of transfer units).

Advanced treatment of livestock wastewater using an ...
Advanced treatment of livestock wastewater using an ...

The present study was carried out to analyze the effect of ,calcium carbonate, addition ... In order to examine the effect of ,calcium carbonate, addition on ,wastewater, treatment (especially ammonium oxidation), ... indicating that the PO4-P ,removal, eff† was more than 99.9% in the 0% CaCO3 column, 1.5% CaCOa column, and 20%

Evaluation of UASB/CO2 Stripping System for Simultaneous ...
Evaluation of UASB/CO2 Stripping System for Simultaneous ...

After the UASB process, a gradual decrease of pH was observed and CO2-stripping indicated the formation ,of acid,/methane and ,carbonate,. The high concentration of ,carbonate, that was generated from the elevated pH of the CO2 stripper easily reacted with ,calcium, in the ,wastewater, to form a solid-phase ,calcium carbonate,.

Biological Nutrient Removal Operation
Biological Nutrient Removal Operation

Removal, of Phosphate from ,Wastewater, • General ... and produce carbonic ,acid, (H 2 CO 3). ... • Alkalinity is measured in terms of ,calcium carbonate, or CaCO 3, and it is generally accepted that 7.14 lbs of alkalinity is needed for every 1.00 lb of ammonia oxidized.

Acid Gas Scrubbers and Calcium: Solutions
Acid Gas Scrubbers and Calcium: Solutions

For situations where ,calcium carbonate, is the primary scale, you can decrease the pH of the scrubber. ,Acid, gas ,removal, efficiency decreases when operating at a lower pH, but the drop in efficiency can be overcome by increasing the packing height (and thus the number of transfer units).

Water Handbook - Deposit And Scale Control-Cooling System ...
Water Handbook - Deposit And Scale Control-Cooling System ...

pHs = the pH at which water with a given ,calcium, content and alkalinity is in equilibrium with ,calcium carbonate,. K2 = the second dissociation constant for carbonic ,acid,. Ks = the solubility product constant for ,calcium carbonate,. These terms are functions of temperature and total mineral content.

Calcium removal from industrial wastewater by bio ...
Calcium removal from industrial wastewater by bio ...

High concentrations of soluble ,calcium, in industrial ,wastewater, present problems due to the calcification of downstream processing. The current trend towards circuit closure and increased water re‐use will escalate this problem. We investigated ureolytic microbial ,carbonate, precipitation as a novel process for removing excess ,calcium, from industrial effluents. Two laboratory‐scale reactors ...

Enhancement of Reverse Osmosis Water Recovery Using ...
Enhancement of Reverse Osmosis Water Recovery Using ...

use ,calcium carbonate, (calcite) or ,calcium, sulfate (gypsum) as seed. The ASP ,removal, of ,calcium, from municipal ,wastewater, using ,calcium carbonate, seed is difficult due to the presence of considerable quantities of phosphate and magnesium. ... recovery after the addition of 3 mg L-1 Flocon 135 antiscalant and ,acid, dosing to achieve a pH of

Synthesis of Polyacrylic Acid Stabilized Amorphous Calcium ...
Synthesis of Polyacrylic Acid Stabilized Amorphous Calcium ...

12/7/2010, · Biogenic ,Calcium Carbonate, with Hierarchical Organic–Inorganic Composite Structure Enhancing the ,Removal, of Pb(II) from ,Wastewater,. ACS Applied Materials & Interfaces 2017, 9 (41) , 35785-35793. DOI: 10.1021/acsami.7b09304. Zhouyue Lei, Shengtong Sun, and Peiyi Wu .

Calcium removal from industrial wastewater by bio ...
Calcium removal from industrial wastewater by bio ...

High concentrations of soluble ,calcium, in industrial ,wastewater, present problems due to the calcification of downstream processing. The current trend towards circuit closure and increased water re‐use will escalate this problem. We investigated ureolytic microbial ,carbonate, precipitation as a novel process for removing excess ,calcium, from industrial effluents. Two laboratory‐scale reactors ...

Recent Development in Ammonia Stripping Process for ...
Recent Development in Ammonia Stripping Process for ...

The formation of ,calcium carbonate, scale on the packing material is due to the absorption of carbon dioxide from the air stream used for stripping. Moreover, the nature of ,calcium carbonate, varies from soft to hard. Viotti and Gavasci, thus, suggested chemical cleaning to attain higher ,removal, of ammonia from ,wastewater, .

Biological Nutrient Removal Operation
Biological Nutrient Removal Operation

Removal, of Phosphate from ,Wastewater, • General ... and produce carbonic ,acid, (H 2 CO 3). ... • Alkalinity is measured in terms of ,calcium carbonate, or CaCO 3, and it is generally accepted that 7.14 lbs of alkalinity is needed for every 1.00 lb of ammonia oxidized.

Recent Development in Ammonia Stripping Process for ...
Recent Development in Ammonia Stripping Process for ...

The formation of ,calcium carbonate, scale on the packing material is due to the absorption of carbon dioxide from the air stream used for stripping. Moreover, the nature of ,calcium carbonate, varies from soft to hard. Viotti and Gavasci, thus, suggested chemical cleaning to attain higher ,removal, of ammonia from ,wastewater, .

Evaluation of UASB/CO2 stripping system for simultaneous ...
Evaluation of UASB/CO2 stripping system for simultaneous ...

After the UASB process, a gradual decrease of pH was observed and CO 2 ‐stripping indicated the formation ,of acid,/methane and ,carbonate,. The high concentration of ,carbonate, that was generated from the elevated pH of the CO 2 stripper easily reacted with ,calcium, in the ,wastewater, to form a solid‐phase ,calcium carbonate,.

Enhancement of Reverse Osmosis Water Recovery Using ...
Enhancement of Reverse Osmosis Water Recovery Using ...

use ,calcium carbonate, (calcite) or ,calcium, sulfate (gypsum) as seed. The ASP ,removal, of ,calcium, from municipal ,wastewater, using ,calcium carbonate, seed is difficult due to the presence of considerable quantities of phosphate and magnesium. ... recovery after the addition of 3 mg L-1 Flocon 135 antiscalant and ,acid, dosing to achieve a pH of

Advanced treatment of livestock wastewater using an ...
Advanced treatment of livestock wastewater using an ...

The present study was carried out to analyze the effect of ,calcium carbonate, addition ... In order to examine the effect of ,calcium carbonate, addition on ,wastewater, treatment (especially ammonium oxidation), ... indicating that the PO4-P ,removal, eff† was more than 99.9% in the 0% CaCO3 column, 1.5% CaCOa column, and 20%

Effects of calcium concentration on up-flow multistage ...
Effects of calcium concentration on up-flow multistage ...

Meanwhile, Langerak et al. (1998) reported the lower ,calcium, concentration of 600 mg/L in acidified ,wastewater, with a high COD ,removal, efficiency (98%) and less ,calcium, precipitated. The reactor-fed BSW with a higher ,calcium, content showed faster ,calcium, accumulation on sludge granules.

Industrial Limescale Remover | Industrial Calcium Remover
Industrial Limescale Remover | Industrial Calcium Remover

Our product is a buffered acid for limescale and calcium carbonate removal whereas other acids such as hydrochloric, phosphoric and others have been used for clearing scale but have been extremely hazardous, corrosive, and not safe to handle. For a free sample, consultation, or more information please contact us today!

Calcium (Ca) and water - Lenntech
Calcium (Ca) and water - Lenntech

Other examples of ,calcium, applications are ,calcium, hypo chloride as bleach and for disinfection, ,calcium, phosphate in glass and porcelain industries, ,calcium, polysulphide and hydroxide as flocculants in ,wastewater, treatment, and ,calcium, fluoride as turbidity agent in enamel industries, in UV-spectroscopy, and as a raw material for fluid ,acid, production.

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

PHOSPHATE REMOVAL FROM WASTEWATERS Investigations of phosphate removal from wastewaters by calcium phosphate precipitation were conducted at the Sanitary Engineering Research Laboratory (SERL) wastewater treatment facility. The phosphate removal performance of …

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