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The sterilization effect of chlorine-containing disinfectants does not hinge on the total available chlorine concentration, but rather on the concentration of hypochlorous acid (HClO) molecules. To reduce the cost of circulating water sterilization in thermal power plants, HClO solution was used to sterilize circulating water. The HClO solution was prepared from sodium hypochlorite (NaClO) solution, CO2 and pure water by non-electrolytic method, and experimental study on application performance (including stability and sterilization effect) of the HClO solution was conducted. The results showed that, the mass concentration of HClO in NaClO solution was extremely low, the mass fraction of HClO to available chlorine was only 0.690%~0.012% in NaClO solution with mass concentration of available chlorine in the range of 100~2 000 mg/L, which could be increased to 94.91% by reacting with CO2, thereby improving the sterilization efficiency. When 30, 60, 80, and 90 mg/L stabilizer were added, the decomposition rate of HClO solution with mass concentrations of 500, 1 000, 1 500 and 2 000 mg/L could meet the requirements for a shelf life of one year of the Disinfection Technical Specification. When the dosage of NaClO and HClO (calculated by available chlorine) was 5 mg/L and 0.06 mg/L，the sterilizing time was 120 min and 15 min, the sterilizing rate could reach 90%, and it can be seen that HClO was more economical and efficient for sterilization. HClO solution can reduce the cost of circulating water bactericides in thermal power plants by more than 55% compared with that of conventional NaClO.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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