are uniform throughout the tank. An advantage of the CMAS process is the dilution of shock loads that occur in the treatment of industrial wastewaters. The CMAS process is relatively simple to operate but tends to have low organic substrate concentrations(i.e., low F/M ratios)that encourage the growth of filamentous bacteria, causing sludge bulking problems.
< Requirement & Assumption >
2. 하수처리 공정
- 하수처리 공정은 처리 정도, 처리장 부지의 지형, 기타 조건 등에 따라서 결정된다. 하수 중의 큰 부유물은 스크린으로, 모래와 같은 물질은 침사지로, 침전성고형물질은 침전법으로 제거하는 1차 처리, 하수의 1차 처리 후 하는 2차 처리, 그리고 1차 처리와 1차 처리로 제거되지
Grit chamber
Definition
Remove the grit and inorganic matter over 0.2mm in waste water
[ Function ]
Prevent abrasiona and damage of machine equipment
Prevent Piping system blockage
Prevent adverse effect by deposits
Gravity type chamber
Using the gravity and velocity of waste water
Take the deposits to sludge facility, using sand pump
Aeration type chamber
Using centri
Calculations of the design of each unit operations
Flowrate
Present Average Flowrate = 4220 m3/d
Water use per capita = 4220/15000 = 0.281333 m3/d capita
Population after 10 years = 15000 Χ 1.0310 = 20158.75 ≒ 21000 capita
∴ Average Flowrate = 0.281333 Χ 21000 = 5908 m3/d ≅6000m3/d
Peak Flowrate = 5908 Χ 1.5 = 8862 m3/d ≅9000 m3/d
Screening
Conditions
Cle
rate-N (NO3-), ammonia-N (NH4+) and nitrite-N (NO2-)
DON is a mixture of compounds ranging from amino acids to complex humic substances
N losses In Agricultural Fields
Generally, studies for N losses has not considered DON but DIN in agricultural systems
Whereas DON has been regarded as a major component in N losses of nonagricultural systems
Albeit lack of knowledge on DON, The idea i