BOD5 275 mg/L COD 500 mg/L NBDCOD

BOD5 275 mg/L COD 500 mg/L NBDCOD

 

 

BOD5가 275 mg/L 이고, COD가 500 mg/L 인 경우에

NBDCOD (mg/L)는? (단, 탈산소계수 K1(밑이 10) = 0.15 /day)

① 약 114

② 약 127

③ 약 141

④ 약 166

 

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▶ NBDCOD = COD – BDCOD

> BDCOD = BOD_u

( 참고 https://ywpop.tistory.com/13762 )

 

 

 

▶ BOD_t = BOD_u [1 – 10^(–k•t)]

( 참고 https://ywpop.tistory.com/10437 )

 

 

 

BOD_u = BOD_t / [1 – 10^(–k•t)]

= (275) / [1 – 10^(–0.15×5)]

= 334.48 mg/L

= BDCOD

 

 

 

NBDCOD = COD – BDCOD

= 500 – 334.48

= 165.52 mg/L

 

 

 

답: ④ 약 166

 

 

 

 

[키워드] NBDCOD 기준문서, NBD COD 기준문서