Wang Yifei, Jia Aiyin, Wu Yue, Wu Chunde, Chen Lijun
a College of Environment and Energy , South China University of Technology , Guangzhou 510006 , People's Republic of China.
Environ Technol. 2015 Jan-Feb;36(1-4):479-86. doi: 10.1080/09593330.2014.952345. Epub 2014 Aug 28.
The effect of hydrodynamic cavitation (HC) on potable water disinfection of chemicals was investigated. The bore well water was introduced into HC set-up to examine the effect of HC alone and combination of HC and chemicals such as chlorine dioxide and sodium hypochlorite. The effect of inlet pressure and geometrical parameters on disinfection was studied using HC alone and the results showed that increasing inlet pressure and using more and bigger holes of orifice plates can result in a higher disinfection rates. When HC was combined with chemicals, HC can reduce the doses of the chemicals and shorten the time of disinfection. It was also found that the decrease in bacteria concentration followed a first-order kinetic model. As for the experiment of combination of HC and sodium hypochlorite for disinfection, HC not only improves the disinfection rate but also degrades natural organic matter and chloroform. Compared with only sodium hypochlorite disinfection, combined processes get higher disinfection rate and lower production of chloroform, particularly the pretreatment with HC enhances the disinfection rate by 32% and there is a simultaneous reduction in production of chloroform by 39%.
研究了水力空化（HC）对饮用水化学消毒的影响。将井水引入HC装置，以考察单独使用HC以及HC与二氧化氯、次氯酸钠等化学物质联合使用的效果。使用单独的HC研究了入口压力和几何参数对消毒的影响，结果表明，提高入口压力以及使用更多、更大孔的孔板可提高消毒率。当HC与化学物质联合使用时，HC可减少化学物质的用量并缩短消毒时间。还发现细菌浓度的降低遵循一级动力学模型。对于HC与次氯酸钠联合消毒的实验，HC不仅提高了消毒率，还降解了天然有机物和氯仿。与仅使用次氯酸钠消毒相比，联合工艺具有更高的消毒率和更低的氯仿产量，特别是用HC进行预处理可使消毒率提高32%，同时氯仿产量降低39%。
