Sewage treatment device and method based on ORP (Oxidation Reduction Potential)

Abstract

The invention discloses a sewage treatment device and method based on ORP (oxidation-reduction potential). The sewage treatment device at least comprises an electric control valve, a gas flow meter, an efficient catalytic feeding device, a first ORP instrument, a second ORP instrument, a pump, an ozone catalytic oxidation pond and a controller. According to the sewage treatment device provided by the invention, the concentration of oxides in water is controlled, and the oxidation-reduction potential is kept within a certain range, so that the ozone adding concentration can be controlled. In the ozone adding and gas dissolving links in the ozone advanced oxidation process, the scheme of adding ORP instruments before and after is adopted to indirectly control the reaction catalytic oxidation effect and the ozone adding amount, the ozone adding amount can be accurately controlled in real time, and the labor intensity is reduced; and on the premise of meeting the effluent index, the ozone consumption can be reduced, the operation cost is reduced, and an energy-saving and efficient sewage treatment mode is realized.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an ORP-based sewage treatment device and method. Background technique [0002] Ozone catalytic oxidation technology is one of the main application forms of advanced oxidation treatment technology. This technology uses hydroxyl radicals (OH) with strong oxidizing ability produced by ozone decomposition to make macromolecules and refractory Organic matter is oxidized into low-toxic or non-toxic small molecular substances. [0003] The core of ozone catalytic oxidation technology is to oxidize organic pollutants by using hydroxyl radicals generated by ozone decomposition. Therefore, the amount of ozone dosage is one of the key indicators that affect the efficient application of this technology. In sewage treatment projects, the water quality of the sewage to be treated is usually unstable. At present, conventional ozone dosing devices can only manually adjust the amount of...

AI Technical Summary

Problems solved by technology

In sewage treatment projects, the water quality of the sewage to be treated is usually unstable. At present, conventional ozone dosing devices can only manually adjust the amount of ozone dosing according to the change of CODcr (dichromate index) of the influent and effluent, that is, the use of dichromate Potassium acid (K 2 Cr 2 o 7 ) as the chemical oxygen consumption measured as an oxidant; it is impossible to adjust the ozone dosage in real time according to the change of influent water quality, which may easily cause insufficient or excessive ozone dosage in this process section, thereby affecting the effect and efficiency of catalytic oxidation

Images