water flow direction, inlet locates downside and outlet locates upside.
Through this, we can know that axial impeller is not suitable. Also, because of wide width of tank, it has poor mixing.
Second, there is a problem with chemicals. PAC is injected with Cl2, so activation of Cl2 must be restricted.
Also, using alum may cause settling.
Alum lowered pH in localized area. To overcome this
2.3 Methods used for restoration
Firstly, a water purification system using gravel contact oxidation process was installed to clean the water. The system located in Young-dong 2 gyo was the first to utilize the gravel contact oxidation process in Korea. It uses a media like gravel and artificially maximize the natural purification process like precipitation, absorption and decomposition by
4.2.4 중수도 수질기준의 문제점
우리의 중수도 수질기준은 일본•미국과 비교하여 아직 개략적이다. 일본의 경우 사용용도는 우리와 비슷하지만 수질기준 항목이 더 세부적이고 강화되어 있다. 미국의 기준은 국내 기준과 비교하여 수질기준 항목 수는 비슷하지만 중수 사용용도와 사용방법에 따
2-4. Song jeon Water treatment plant
- Korea’s first Advanced Water Treatment Process
- Living water supply (200,000 tons)
- Improved health , sanitation, culture level
- Local economy development
3. Factors of DAF efficiency
Ozone concentration
Temperature
Bubble Size
Ⅱ. Policy Analysis of
4 rivers restoration Project
1. React to climatic change
2. Secure water resources
3. Water improvement
4. illegality of pushing method
5. Economic problems
6. Ecosystem restoration
7. Doubts of the grand canal
8. Damages of cultural assets