1. 인간생활과 물
• 물은 지구 표면에서 가장 풍부한 물질
• 바다는 지구 표면의 71%를 차지.
• 역사적으로 문명이 발달한 지역 모두 강 주변 지역
(메소포타미아 문명 : 티그리스, 유프라테스강
이집트 문명: 나일강 유역, 인더스 문명-인더스강)
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5) DO (Dissolved Oxy
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
Cooling tower location
Hazardous area
Cooling tower fog control
Winter operation
Cooling water 화학적 처리 목적
냉각 표면의 SCALE 방지
Cooling water와 접촉되는 금속의 부식 방지
냉각 탑 자체와 냉각표면의 FOULING 방지
COOLING TOWER TIMBER
2-4. Song jeon Watertreatment plant
- Korea’s first Advanced WaterTreatment 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
수처리에 지장을 가져오게 된다.
What is this explanation?
This is a term used both to refer to a widely utilized wastewatertreatment process, and to the solid com-pounds which result from that process.
① Water sludge
② Back washed wastes
③ lifestyle sludge
④ Activated sludge