Nanjing Institute of Environmental Sciences of the Ministry of Environmental Protection of China, Jiangwangmiao Str 8, 210042, Nanjing, China.
Environ Sci Pollut Res Int. 2015 Apr;22(8):6298-307. doi: 10.1007/s11356-014-3889-1. Epub 2014 Nov 29.
This paper presents the purification of eutrophic water using a combination of hydrodynamic cavitation (HC) and ozonation (O3) at a continuous flow of 0.8 m(3) h(-1) on a pilot scale. The maximum removal rate of chlorophyll a using O3 alone and the HC/O3 combination was 62.3 and 78.8%, respectively, under optimal conditions, where the ozone utilization efficiency was 64.5 and 94.8% and total energy consumption was 8.89 and 8.25 kWh m(-3), respectively. Thus, the removal rate of chlorophyll a and the ozone utilization efficiency were improved by 26.5% and 46.9%, respectively, by using the combined technique. Meanwhile, total energy consumption was reduced by 7.2%. Turbidity linearly decreased with chlorophyll a removal rate, but no linear relationship exists between the removal of COD or UV254 and chlorophyll a. As expected, the suction-cavitation-assisted O3 exhibited higher energy efficiency than the extrusion-cavitation-assisted O3 and O3 alone methods.
本文采用水力空化（HC）与臭氧化（O3）联合工艺，在 0.8 m3/h 的连续流量下对富营养化水进行了中试规模的净化研究。在最佳条件下，单独使用 O3 和 HC/O3 组合对叶绿素 a 的最大去除率分别为 62.3%和 78.8%，臭氧利用率分别为 64.5%和 94.8%，总能耗分别为 8.89 和 8.25 kWh/m3。因此，与单独使用 O3 相比，组合技术可将叶绿素 a 的去除率提高 26.5%，臭氧利用率提高 46.9%，同时总能耗降低 7.2%。浊度随叶绿素 a 的去除率呈线性下降，但 COD 或 UV254 的去除与叶绿素 a 之间不存在线性关系。不出所料，与单独使用 O3 或挤出式空化辅助 O3 相比，抽吸式空化辅助 O3 的能量效率更高。
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