The Solution of Chemical Sewage Treatment Process

What is the chemical sewage treatment?

chemical wastewater refers to the wastewater produced in the production process of chemical plants, such as oily wastewater from the production of ethylene, polyethylene, rubber, polyester, methanol, ethylene glycol, oil tank farms, air separation and air compressor stations, etc. After biochemical treatment, it can generally meet the national secondary discharge standard. Now, due to the shortage of water resources, the water that meets the discharge standard needs to be further advanced after further treatment to meet the requirements of industrial water replenishment and reuse.

The features of chemical sewage treatment?

◆ The water quality is complex, with many by-products, and the reaction raw materials are often solvents or compounds with cyclic structures, which increases the difficulty of wastewater treatment;

◆ The high content of pollutants in the wastewater is caused by the incomplete reaction of the raw materials and the entry of the raw materials or a large amount of solvent media used in the production into the wastewater system;

◆ There are many toxic and harmful substances, and many organic pollutants in fine chemical wastewater are toxic and harmful to microorganisms. Such as halogen compounds, nitro compounds, dispersants or surfactants with bactericidal effect, etc.;

◆ There are many biodegradable substances, the B/C ratio is low, and the biodegradability is poor;

◆ The wastewater has high chroma;

The solution of domestic sewage treatment process

Micro-electrolysis technology is an ideal process for treating this kind of sewage. This process can not only greatly reduce the COD and chroma, but also improve the biodegradability of wastewater when used in the treatment of high-salt, refractory and high-chroma wastewater.

The technology is to use the micro-electrolysis fillers filled in the micro-electrolysis equipment to produce a "primary battery" effect to treat wastewater without electricity. When water is passed through, countless "primary cells" with a potential difference of 1.2V are formed in the device. The "primary battery" uses wastewater as electrolyte, and conducts electrolytic oxidation and reduction treatment of wastewater through discharge to form current, so as to achieve the purpose of degrading organic pollutants. The new ecological [OH], [H], [O], Fe2+, Fe3+, etc. produced in the treatment process can undergo redox reactions with many components in the wastewater, such as the chromophore that can destroy the colored substances in the colored wastewater. The resulting Fe2+ is further oxidized to Fe3+, and their hydrates have strong adsorption-flocculation activity, especially after adding alkali to adjust the pH value to generate hydrogen Ferrous oxide and ferric hydroxide colloidal flocculants, their flocculation capacity is higher than that of ferric hydroxide colloids obtained by hydrolysis of general chemicals, and can flocculate a large number of tiny particles, metal particles and organic macromolecules dispersed in water. Its working principle is based on electrochemical , oxidation-reduction, physical and flocculation precipitation combined.

The process has the advantages of wide application range, good treatment effect, low cost, short treatment time, convenient operation and maintenance, low power consumption, etc., and can be used in pretreatment and advanced treatment of industrial wastewater.

BIOETP provide service for  ETP/STP designing, equipment manufacturing, plant installation, operation training and maintenance service. also provide solutions and equipments for almost all kinds of sludge dewatering treatment. also provide smell control solutions and smell control plant and related equipmentsfor APIs industry and feed processing industry. 

So, if you have any ETP/STP , sludge dewatering , smell control requirement aroused, please feel free to contact BIOETP. You can find our contact on BIOETP official website www.bioetp.com.