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Three effect evaporator for acid wastewater treatment

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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Three effect evaporator for acid wastewater treatment
Microbial induced solidification and stabilization of ...
Microbial induced solidification and stabilization of ...

17/10/2019, · Moreover, S. pasteurii ,can, survive from high alkalinity and heavy metal toxicity of fly ash solution. Further, the unconfined compressive strength (UCS) of MICP ,treated, fly ashes A and B reached 0.385MPa and 0.709 MPa, respectively. The MICP treatment also resulted in a reduction in the leaching toxicity of heavy metals, especially for Cu, Pb and Hg.

US2645561A - Sodium sulfate recovery - Google Patents
US2645561A - Sodium sulfate recovery - Google Patents

In general, the quantity of sulfuric ,acid, added to the mother liquor of the anhydrous ,sodium, sulfate solids should be sufficient to precipitate one or more ,acid, sulfates of ,sodium,. By the ,precipitation, of such ,acid, sulfates of ,sodium,, the substantially complete removal of the anhydrous ,sodium, sulfate is assured.

Wastewater treatment for tin plating
Wastewater treatment for tin plating

The recommended treatment will depend somewhat upon your discharge limits. Hydroxide ,precipitation, at a pH of 9-9.5, followed by flocculation, clarification, and a final polishing filter should meet normal limits, but, if you have an exceptionally low limit for lead, copper or nickel, etc., then a different approach may be required. Lyle Kirman

Hydrothermal Treatment of Arsenic Sulfide Residues from ...
Hydrothermal Treatment of Arsenic Sulfide Residues from ...

However, such wastewater is usually ,treated, with ,sodium sulfide,, ,sodium, hydrosulfide or hydrogen ,sulfide, to precipitate arsenic, and the deposition of arsenic ,sulfide, residue (ASR) is then engendered [ 15, 16 ]. It is estimated that hundreds of thousands of tons of ASR are generated annually in China.

Sulfide precipitation of heavy metals - EPA - Home Page ...
Sulfide precipitation of heavy metals - EPA - Home Page ...

Sulfide precipitation is quite effective, even in the acidic pH; thus, selective metal recovery and the obtaining of effluent water of low calcium content (for possible water recycling because no lime may be required) are possible.

Hydrothermal Treatment of Arsenic Sulfide Residues from ...
Hydrothermal Treatment of Arsenic Sulfide Residues from ...

However, such wastewater is usually treated with sodium sulfide, sodium hydrosulfide or hydrogen sulfide to precipitate arsenic, and the deposition of arsenic sulfide residue (ASR) is then engendered [ 15, 16 ]. It is estimated that hundreds of thousands of tons of ASR are generated annually in China.

Wastewater treatment method of PCB circuit board factory ...
Wastewater treatment method of PCB circuit board factory ...

The emulsified waste liquid in PCB wastewater was acidified with sulfuric acid to pH = 2 for demulsification and oil separation treatment, and then lime milk was used for coagulation and ...

Ferrous and sulfide treatment of electroplating wastewater ...
Ferrous and sulfide treatment of electroplating wastewater ...

The wastewater is first adjusted to a pH of from about 8 to 10 and then ,treated, with ,sodium sulfide, to provide ,sulfide, ions to effect ,precipitation, of heavy metal contaminants followed by treatment with ferrous sulfate or ferrous chloride to provide ferrous ions to chemically reduce the hexavalent chromium to its trivalent state.

(PDF) Integrated Treatment Scheme for Rubber Thread ...
(PDF) Integrated Treatment Scheme for Rubber Thread ...

The high BOD and COD ratio of ,the waste, - ,water, (0.78 to 0.90) indicates that the rubber wastewater is biodegradable and ,can be treated, effectively by an anaerobic digestion process commonly ...

Sulfide precipitation of heavy metals - EPA - Home Page ...
Sulfide precipitation of heavy metals - EPA - Home Page ...

Sulfide precipitation is quite effective, even in the acidic pH; thus, selective metal recovery and the obtaining of effluent water of low calcium content (for possible water recycling because, no, lime may be required) are possible.

Process for the purification of acidic metal-bearing waste ...
Process for the purification of acidic metal-bearing waste ...

Also, they found that dissolved sulfite (SO 2 2−) present in the water consumed some of the sulfide, thus reducing the amount of sulfide available for precipitation. Previous processes, as described in many patents and publications, have attempted to remove metals from acidic waste streams to minimize the environmental impact of the wastewater release.

sulfamic acid main effect | chemicals news
sulfamic acid main effect | chemicals news

Such as ,electroplating wastewater, treatment 400ppmNi, 150 g / L of amino sulfonic ,acid, 50ml and recovery (NH2SO3) 2112 g / L, NiSO4148 g / dl. In the nickel component repair need nickel nickel, in the anode processing available 100 g / L of amino sulfonic ,acid, treatment.

Summary Report: Control and Treatment Technology for the ...
Summary Report: Control and Treatment Technology for the ...

In the soluble ,sulfide precipitation, (SSP) process, the ,sulfide, is added in the form of a ,water,-soluble ,sulfide, reagent such as ,sodium sulfide, (Na2S) or ,sodium, hydrosulfide (IMaHS). A more recently developed process adds a slightly soluble ferrous ,sulfide, (FeS) slurry to the wastewater to supply the ,sulfide, ions needed to precipitate the heavy metals.

(PDF) Effect of speciation and composition on the kinetics ...
(PDF) Effect of speciation and composition on the kinetics ...

Precipitation, of arsenic as As2S3 produces little ,waste, sludge, has the potential for low chemical consumption and for selective metal ... Effect of speciation and composition on the kinetics and ,precipitation, of arsenic ,sulfide, from industrial metallurgical wastewater. …

Summary Report: Control and Treatment Technology for the ...
Summary Report: Control and Treatment Technology for the ...

In the soluble ,sulfide precipitation, (SSP) process, the ,sulfide, is added in the form of a ,water,-soluble ,sulfide, reagent such as ,sodium sulfide, (Na2S) or ,sodium, hydrosulfide (IMaHS). A more recently developed process adds a slightly soluble ferrous ,sulfide, (FeS) slurry to the wastewater to supply the ,sulfide, ions needed to precipitate the heavy metals.

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