NBDICOD(Non-biodegradable insoluble COD) 농도

NBDICOD(Non-biodegradable insoluble COD) 농도

 

 

어느 폐수의 사료를 분석한 결과가 다음과 같다면

NBDICOD(Non-biodegradable insoluble COD) 농도(mg/L)는?

(단, K(BODu/BOD5)는 1.72를 적용할 것)

 

<분석 결과>

COD = 857 mg/L, SCOD = 380 mg/L

BOD5 = 468 mg/L, SBOD5 = 214 mg/L

TSS = 384 mg/L, VSS = 318 mg/L

 

① 24.68

② 32.56

③ 40.12

④ 52.04

 

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K = BODu / BOD5 = 1.72 이고,

BODu = BDCOD 이므로,

BDCOD = 1.72 × BOD5

= 1.72 × 468 = 804.96 mg/L

 

 

 

COD = BDCOD + NBDCOD

( 참고 https://ywpop.tistory.com/23100 )

 

NBDCOD = COD – BDCOD

= 857 – 804.96 = 52.04 mg/L

 

 

 

BDCOD = 1.72 × BOD5

---> BDSCOD = 1.72 × SBOD5

= 1.72 × 214 = 368.08 mg/L

 

 

 

SCOD = BDSCOD + NBDSCOD 이므로,

NBDSCOD = SCOD – BDSCOD

= 380 – 368.08 = 11.92 mg/L

 

 

 

NBDCOD = NBDICOD + NBDSCOD 이므로,

NBDICOD = NBDCOD – NBDSCOD

= 52.04 – 11.92 = 40.12 mg/L

 

 

 

답: ③ 40.12

 

 

 

 

 

 

 

 

[키워드] NBDICOD 기준문서, NBDICOD dic