內容大鋼
Cryptosporidium outbreaks in recreational water venues have threatened public health, especially in swimming pools. There is still no reliable treatment technique to remove Cryptosporidium oocysts from swimming pools. The performance of six coagulants and granular materials on Cryptosporidium removal from pools was evaluated. Seeding methods of coagulants and their dosage versus oocysts concentrations were tested. Results indicated oocysts removal efficiency for feeding oocysts and coagulant simultaneously were more than 99 (2 log), and continuously feeding of coagulant achieved at least 99％(2 log) removals, compared with removal efficiency was 20％ by control experiment without coagulation. All of these experiments indicated that the polymer coagulant should be fed by pump automatically and continuously in order to maximize oocysts removals. In addition, oocysts concentration impacted the system performance. The higher oocysts concentration consumed more polymer. Overall, polyDEDMAC and PAX is effective and promising coagulants to improve oocysts removals from swimming pools. Furthermore, granular materials were effective to remove Cryptosporidium but filter pressure was significantly increased.
目錄
Chapter 1 Swimming Pool Water Quality Overview
1.1 Introduction
1.2 Materials and Method
1.3 Results and Discussions
1.4 Conclusions
Chapter 2 First Evaluation of Coagulation Applied in Swimming Pool Waters
2.1 Introduction
2.2 Materials and Method
2.3 Results and Discussions
2.4 Conclusions
Chapter 3 Optimization on Cryptosporidium-sized Microspheres Removal from Recreational Water Venues
3.1 Introduction
3.2 Materials and Method
3.3 Results and Discussions
3.4 Conclusion
Chapter 4 Pilot-scale Swimming Pool Study
4.1 Introduction
4.2 Materials and Method
4.3 Results and Analysis
4.4 Discussions
4.5 Conclusions
Chapter 5 Full-scale Swimming Pool Study
5.1 Introduction
5.2 Materials and Method
5.3 Results and Discussions
5.4 Conclusions
Chapter 6 Cryptosporidium-sized Microspheres Removal from Swimming Spa using Cartridge Filter
6.1 Introduction
6.2 Material and Method
6.3 Results and Discussions
6.4 Conclusions
Chapter 7 Summaries
7.1 Overall Conclusions
7.2 Detailed Conclusions
References
[