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deep well drilling residue harmless disposal technology definition us history

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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deep well drilling residue harmless disposal technology definition us history
Removal of boron from wastewater by precipitation of a ...
Removal of boron from wastewater by precipitation of a ...

Based on an industrial case, many methods were tested for the treatment of wastewater containing 50 g L −1 of, sulfuric acid, and 0.7 g L −1 of boron, and a well‐adapted precipitation process consisting of the neutralization of boric and sulfuric acids by powdered calcium hydroxide is proposed.

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

In this paper, the new ,calcium,-,containing, precipitant calcite and aided precipitant fluorite are adopted to purify F-,containing wastewater,, which represents a new approach for fluoride removal from F-,containing wastewater,. As well, several measures are taken in order to explore the relevant mechanisms of precipitation and sedimentation process. 2.

JP4737670B2 - Method and apparatus for treating wastewater ...
JP4737670B2 - Method and apparatus for treating wastewater ...

calcium waste water, sulfuric ,acid wastewater calcium, carbonate Prior art date 2005-03-30 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active Application number JP2005163731A Other languages English (en)

Effective removal of calcium and magnesium sulfates from ...
Effective removal of calcium and magnesium sulfates from ...

The typical compositions of the wastewater are listed as follows, CaSO 4, 0.0113 mol L, −1, MgSO 4 0.124 mol L −1 and (NH 4) 2 SO 4 0.325 mol L −1. In order to reduce the influence of impurities, the synthetic wastewater samples containing CaSO 4, MgSO 4 and (NH 4) 2 SO 4 were prepared and used in the parts of mechanism research.

Defining Hazardous Waste: Listed Characteristic and Mixed ...
Defining Hazardous Waste: Listed Characteristic and Mixed ...

Wastewater, treatment sludges from electroplating operations except from the following processes: (1) Sulfuric ,acid, anodizing of aluminum; (2) tin plating on carbon steel; (3) zinc plating (segregated basis) on carbon steel; (4) aluminum or zinc-aluminum plating on carbon steel; (5) cleaning/stripping associated with tin, zinc and aluminum plating on carbon steel; and (6) chemical etching and ...

(PDF) Precipitation Methods Using Calcium-Containing Ores ...
(PDF) Precipitation Methods Using Calcium-Containing Ores ...

Zhang, Y. Study on New Technology about Coprocessing High-Acid Wastewater Containing, Fluoride, by Using Calcium-Based Ore. Master’s Thesis, Central South University, Changsha, China, 2017. 40.

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

and thus needs to be treated efficiently. In this paper, the new ,calcium,-,containing, precipitant calcite and aided precipitant fluorite were adopted to purify F-,containing wastewater,. Relevant reaction conditions, such as reaction time, oscillation rate, dosage of hydrochloric ,acid,, calcite dosage and

Membrane fouling caused by amino acid and calcium during ...
Membrane fouling caused by amino acid and calcium during ...

Since ,calcium, and amino ,acid, are present naturally in fermentation ,wastewater,, this study was carried out to determine the effects of ,calcium, and amino ,acid, on membrane fouling when simulated fermentation ,wastewater containing, ammonium sulfate was treated by BMED.

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

2/12/2014, · ,Wastewater,, or sewage, originates from human and home wastewaters, industrial wastes, animal wastes, rain runoff, and groundwater infiltration. Generally, ,wastewater, is the flow of used water from a neighborhood. The ,wastewater, consists of 99.9% water by weight, where the remaining 0.1% is suspended or dissolved material.

Precipitation treatment of effluent acidic wastewater from ...
Precipitation treatment of effluent acidic wastewater from ...

26/2/2014, · This method consists of adding a, calcium, compound (such as CaCO 3, Ca(OH) 2, and CaO) to the, acid water,, in two stages, such that the phosphate and other impurities form solids precipitates that settle and are separated from the thus purified water.

MaxH O DESALTER technology treats calcium sulphate ...
MaxH O DESALTER technology treats calcium sulphate ...

This paper presents the results from a recent pilot conductedwith ,acid, mine drainage ,wastewater,. The results show that the system can reach recovery of over 90%, at which the a ,calcium, sulphate saturation index theoretically reaches over 3,000%, whichtypically leads to immediate ,calcium, sulphate precipitation on the RO membrane.

Effective removal of calcium and magnesium sulfates from ...
Effective removal of calcium and magnesium sulfates from ...

wastewater, with high hardness. 4 The generation of ,wastewater containing, Ca and Mg during the RE production process is illus-trated in the ESI (Fig. S1 †). ... Ltd. Concentrated hydrochloric ,acid,, oxalic ,acid,, ,calcium, hydroxide, sodium phosphate, ammonium chloride, ,calcium, sulfate and magnesium sulfate were purchased from

PCB circuit board factory wastewater treatment - Shenzhen ...
PCB circuit board factory wastewater treatment - Shenzhen ...

The cyanide-,containing wastewater, and the ,chromium,-,containing wastewater, in the circuit board are often subjected to a redox method, as described later. Chemical precipitation is the use of one or several chemicals to convert harmful substances into easily separated precipitates or precipitates.

14 Industrial Wastewater Treatment Principals and Ideas
14 Industrial Wastewater Treatment Principals and Ideas

The third type is classified according to the main components of the pollutants contained in the ,wastewater,, such as acidic ,wastewater,, alkaline ,wastewater,, cyanide-,containing wastewater,, ,chromium,-,containing wastewater,, cadmium-,containing wastewater,, mercury-,containing wastewater,, phenol-,containing wastewater,, aldehyde-,containing wastewater,, and oily ,wastewater,. , sulfur-,containing wastewater, ...

D7 On-site wastewater treatment
D7 On-site wastewater treatment

Good Practice Sheet for Use of ,Chromium, Trioxide On-site ,wastewater treatment,. Equipment Design and Access. Different options for management of ,wastewater containing chromium, trioxide are available. These include on-site ,wastewater treatment, and/or disposal as a hazardous waste by a licensed contractor according to applicable regulations.

Article Recovery and Reuse of Chromium Ions from Tannery ...
Article Recovery and Reuse of Chromium Ions from Tannery ...

2 SO, 4 and ,chromium, and ammonium salt NH 4 Cl most of this chemical discharge into waste industrial effluent which made this industries one of the heavy pollution industries ,containing, heavy metal like ,chromium,, copper, nickel, lead, with high concentration

Acid mine drainage - Wikipedia
Acid mine drainage - Wikipedia

Acid mine drainage,, ,acid, and metalliferous drainage (AMD), or ,acid, rock drainage (ARD) is the outflow of acidic water from metal mines or coal mines.. ,Acid, rock drainage occurs naturally within some environments as part of the rock weathering process but is exacerbated by large-scale earth disturbances characteristic of mining and other large construction activities, usually within rocks ...

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