Titanium anodes and titanium electrodes for sterilization of water resources

With the development of industry, the water source is contaminated by various organic substances, and the traditional chlorination disinfection method of water supply system has been found to form substances harmful to human body. So the study of new alternative means of sterilization is increasingly becoming a hot spot at home and abroad and an important direction of development. Existing commercialization of various electric disinfection water processor, mostly in the addition of sodium chloride and other electrolytes, electrolysis produces chlorine dioxide and sodium hypochlorite and other biocides. Baoji Rui Titanium Metals Co., Ltd. has developed a new type of electrolysis sterilizer using its own production and development of insoluble titanium anode, titanium electrode, platinum-plated titanium electrodes and other materials, which can achieve the effect of sterilization and algaecide without affecting the water quality.

Sterilization of water treatment is now commonly used to add chlorine or chloride to the water oxidation disinfection method. However, it is found that chlorination will lead to the production of drinking water in the "three" (carcinogenic, teratogenic, mutagenic) substances. In recent years, the development of ultraviolet light, ozone, ultrasonic, magnetization, electrostatic and other treatment methods, or because of the complexity of the equipment, the treatment of water flow is small, or because of the high cost of treatment and did not get universal application. Electrolysis method is welcomed as a sterilization water treatment technology with good sterilization effect, strong usability and no secondary pollution.

Electrolysis sterilization is classified as indirect sterilization and direct sterilization of two kinds:

First, indirect sterilization: the use of electrolysis to produce ClO-, HclO3, H2O2, O2-, -OH- and other substances to kill microorganisms. Existing commercial disinfection processor, mostly in the addition of sodium chloride and other electrolytes to produce chlorine dioxide and sodium hypochlorite and other biocides.

Second, direct sterilization: direct sterilization is the use of electrolytic electrodes to act directly on microorganisms, so that they die.

Electrolysis sterilization disinfection mechanism:

(1) Electrolysis of chlorine-containing water produces ClO- and a small amount of more highly valued chlorate. The reaction on the electrode is as follows, anode: 2Cl-2e→Cl2, Cl2+H2O→HClO+H++Cl-, OH- ions diffuse into the liquid layer around the anode and hypochlorite reaction to generate ClO-, and further reaction to generate chlorate: 12ClO-+6H2O- 12e→4HClO3+, 8HCl+3O2, and further reaction to generate chlorate: 12ClO-+6H2O- 12e→4HClO3+, 8HCl+3O2. 8HCl+3O2, the resulting HClO and HClO3 are both strong oxidizing agents, with a strong killing effect on microorganisms.

(2) electrolysis does not contain chlorine ions in the water, the original water does not contain Cl-, the same good bactericidal effect, indicating that the electrolysis produced in addition to HOCl other oxidizing substances, after analyzing the anode side of the existence of the following reactions: ①, H2O?→H + + OH- , ②, 20H - 2e → [O] + H2O → H2O2, ③ 4OH- -4e→2H2O+02, ④[O]+O2→O3

Therefore, there are H2O2, O3, [O] and other strong oxidizing disinfectants, so that the treated water electrolysis has a strong bactericidal effect. (3) electrolysis directly on the bacterial cell body, destruction of a bacterial apparatus, resulting in bacterial death.

Chlorine bactericidal effect of the modern point of view is mainly through the role of HClO, HClO molecules reach the bacterial interior, can play an oxidizing role in destroying the bacterial enzyme system and make the bacterial death, oxidation of the end product for the CO2 and H2O. therefore, even if in the case of continuous use of chlorine, but also will not make the bacterial drug-resistant.