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Is the wastewater containing chromium generally acidic or alkaline

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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Is the wastewater containing chromium generally acidic or alkaline
A Comparative Study on Removal Efficiency of Sulphide and ...
A Comparative Study on Removal Efficiency of Sulphide and ...

ammonia nitrogen, after 3 hours of reaction. There was no change in ,ammonia nitrogen, amount after the reactions (Dantas et al., 2003). Mn-Cu/Al 2 O 3 heterogeneous catalytic ozonation process for tertiary treatment depicted that the removal efficiency of COD was 29.3% more as compared to ozonation alone after 60 minutes (Huang et al., 2016).

Free Ammonia Deliming: Effect of Tartaric Acid Addition as ...
Free Ammonia Deliming: Effect of Tartaric Acid Addition as ...

The objective of this study was to evaluate the pelt and ,wastewater, characteristics after deliming process in an ,acid, condition by tartaric ,acid,, also wet blue properties that were formed. Various observed variables were the dose of tartaric ,acid,, pelt thickness, calcium content, physical and chemical properties of wet blue, such as tensile strength, tear strength, elongation, shrinkage ...

Top PDF Biological treatment of tannery wastewater by ...
Top PDF Biological treatment of tannery wastewater by ...

In CETPs, average salt concentration of ,tannery wastewater, had been found to vary between 2% and 6% and this covered salt tolerant regime only. The salt concentration hardly exceeded 8% (w/v) for effluent released from beam house operations of leather process- ing units and the identified mixed consortia reported in this study could be advantageously employed for efficient biological treatment ...

TREATMENT OF TANNERY WASTEWATER BY PRETREATMENT ...
TREATMENT OF TANNERY WASTEWATER BY PRETREATMENT ...

The ,tannery wastewater, is difficult to treat because of its fluctuant quality and volume,high pollution load capacity and its virulence.This project uses pretreatment-coagulation-anaerobic hydrolysis-cyclic activated sludge technology(C-TECH) process to treat ,tannery wastewater,.It is studied the change rule of C-TECH pond aeration time with COD_ Cr ,NH_3-N and DO.The result indicates that it ...

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