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In the acid wastewater containing chromium in electroplating workshop

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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In the acid wastewater containing chromium in electroplating workshop
COAGULATION AND FLOCCULATION TREATMENT OF WASTEWATER …
COAGULATION AND FLOCCULATION TREATMENT OF WASTEWATER …

anionic suspended particles and reduce the levels of Chemical Oxygen Demand (COD) and turbidity in textile industry wastewater. The optimum conditions for this study were at 30 mg/l of chitosan, pH 4 and 20 minutes of mixing time with 250 rpm of mixing rate for 1 minute, 30rpm of mixing rate for 20 minutes and 30 minutes of settling time.

COD Removal of Edible Oil Content in Wastewater by ...
COD Removal of Edible Oil Content in Wastewater by ...

Photo-Fenton process gave a maximum ,COD reduction, of 80.59 % (,COD, from 2684 to 521 mg/l), Fenton gave 53.22 % ... resulting in both high inorganic as well as ,organic, loading of the relevant ,wastewater, treatment works. ... and hydrogen peroxide in ,acidic, aqueous solution, ...

What is Chemical Oxygen Demand (COD) Analysis? - Mantech
What is Chemical Oxygen Demand (COD) Analysis? - Mantech

The traditional ,chemical oxygen demand, (,COD,) analysis method is the wet chemistry method. This involves a two hour digestion at high heat under ,acidic, conditions in which potassium dichromate acts as the oxidant for any ,organic, material present in a water sample.

Electrochemical Recovery of Phosphorus from Acidic Cheese ...
Electrochemical Recovery of Phosphorus from Acidic Cheese ...

chemical precipitation and achieved the ,reduction, of ,COD,, turbidity, and nutrients to some extent.8−10 While physicochemical treatment of cheese ,wastewater, via dosing of alkaline or ,acidic, chemicals is relatively simple and effective and thus has been widely studied,8−11 using strong corrosive chemicals remains a major challenge for widespread

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