How should sewage containing heavy metals be treated?
Environmental protection is the fundamental interest of the long-term stable development of the country, because of the different heavy metal industry in the process of product production of sewage content is different, metal categories and sewage concentration will affect the sewage treatment process, this article small series to introduce the sewage containing heavy metals should be how to treat?
Heavy metal sewage can be divided into: refractory or refractory metal compound sewage and sewage treatment without changing the chemical form.
Heavy metal sewage treatment can be removed by chemical, physical and biological methods, taking electroplating wastewater as an example, to introduce how heavy metal sewage can be treated:
At present, electroplating wastewater treatment on the market can be taken: chemical precipitation method (divided into neutralization precipitation method and sulfide precipitation method), REDOX treatment (divided into chemical reduction method, ferrite method and electrolysis method), solvent extraction separation method, adsorption method, membrane separation technology, ion exchange method, biological treatment technology (biological flocculation method, biological adsorption method, biochemical method, phytoremediation method);
Electroplating wastewater treatment equipment is mainly composed of regulating tank, catalytic oxidation tank, flocculation tank, incipient settling tank, air flotation, dehydrator, sludge tank, clear pool and other devices, the sewage treatment process (catalytic oxidation process) is improved and strengthened according to the traditional chemical oxidation method.
The advantages of heavy metal sewage treatment equipment are:
1, the equipment is equipped with automatic control system, the operation of the equipment is simple, no need to ask professional personnel to take care of;
2, the equipment is made of stainless steel and other materials, so it has strong performance in anti-aging, acid and alkali corrosion;
3, the equipment structure is compact, the choice of installation place is flexible, the floor area is small.
