276 lines
2.8 KiB
Markdown
276 lines
2.8 KiB
Markdown
---
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typ: T
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titel: Bemessungsschlammalter für Abwasserreinigung
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datum: 15-2023-01
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sicherheit: hoch
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---
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# Bemessungsschlammalter für Abwasserreinigung
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Formelsammlung
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kommunale Abwasserreinigung
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Bemessungsschlammalter
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t
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TS,Bem
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= PF ∙ 3,4 ∙ 1,103
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(
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15−T
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)
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∙
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1
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1 −
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V
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D
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V
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BB
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Biomassekonzentration durch
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Umwandlung abbaubarer CSB
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𝑋
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𝐶𝑆𝐵,𝐵𝑀
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= 𝐶
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𝐶𝑆𝐵,𝑍𝐵,𝑎𝑏𝑏
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∙ 𝑌 ∙
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1
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1 + 𝑏 ∙ 𝑡
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𝑇𝑆
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∙ 𝐹
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𝑡
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Energie, thermische
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E
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thermisch
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,
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notwendig
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= 1,163 ∙
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(
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T − T
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min
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)
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∙ Q [
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kWh
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d
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]
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Gasgleichung, ideale
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p ∙ V = n ∙ R ∙ T
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Konzentration partikulärer CSB
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𝑋
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𝐶𝑆𝐵,𝑍𝐵
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= 𝑋
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𝑇𝑆,𝑍𝐵
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∙ 1,6 ∙
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(
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1 − 𝑓
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𝐵
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)
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Konzentration partikulärer, inerter CSB
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𝑋
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𝐶𝑆𝐵,𝑖𝑛𝑒𝑟𝑡,𝑍𝐵
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= 𝑓
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𝐴
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∙ 𝑋
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𝐶𝑆𝐵,𝑍𝐵
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Massebilanz (Veränderung über die Zeit)
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dM
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dt
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= Q
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Zu
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∙ C
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Zu
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− Q
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Ab
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∙ C
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Ab
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Nitratkonzentration, zu denitrifizierende
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𝑆
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𝑁𝑂
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3
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,𝐷
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= 𝑐
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𝑁,𝑍𝐵
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− 𝑆
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𝑜𝑟𝑔𝑁,𝐴𝑁
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− 𝑆
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𝑁𝐻
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4
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,𝐴𝑛
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− 𝑆
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𝑁𝑂
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3
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,𝐴𝑛
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− 𝑋
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𝑜𝑟𝑔𝑁,𝐵𝑀
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− 𝑋
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𝑜𝑟𝑔𝑁,𝑖𝑛𝑒𝑟𝑡
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[
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𝑚𝑔
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𝐿
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]
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Oberflächenbeschickung, erforderliche
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𝑞
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𝐴,𝑒𝑟𝑓
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=
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𝑞
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𝑆𝑉
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𝑉𝑆𝑉
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Rücklaufverhältnis
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𝑅𝑉 =
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TS
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BB
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TS
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RS
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− TS
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BB
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[−]
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RV =
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Q
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RS
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Q
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M
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Schlammalter
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𝑡
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𝑇𝑆
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=
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𝑡
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𝑇𝑆,𝑎𝑒𝑟𝑜𝑏
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1 − 𝑉
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𝐷
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𝑉
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𝐵𝐵
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⁄
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[
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𝑑
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]
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Schlammkonzentration nach 30 min
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Sedimentation
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𝑇𝑆
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𝐿𝑎𝑏𝑜𝑟
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=
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1000
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𝐼𝑆𝑉
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[
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𝑔
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𝐿
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]
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Schlammproduktion, spezifische
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Ü𝑆
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𝑑,𝑐
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= 𝑄
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𝑑
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∗ (
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𝑋
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𝐶𝑆𝐵,𝑖𝑛𝑒𝑟𝑡,𝑍𝐵
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1,33
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+
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𝑋
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𝐶𝑆𝐵,𝐵𝑀
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+ 𝑋
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𝐶𝑆𝐵,𝑖𝑛𝑒𝑟𝑡,𝐵𝑀
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(
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0,92 ∗ 1,42
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)
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+ 𝑋
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𝑎𝑛𝑜𝑟𝑔,𝑇𝑆,𝑍𝐵
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)/1000
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Sauerstoffzufuhr, erforderliche tägliche
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𝑂
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𝑉,𝑑
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= 𝑂
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𝑉
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∙ 𝑉
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𝐵𝐵,𝑔𝑒𝑠
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∙ 𝑉
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𝑁
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𝑉
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𝐵𝐵
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⁄
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[
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𝑘𝑔
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𝑑
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]
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Stickstoffkonzentration, inkorporiert in
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Biomasse
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X
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orgN,BM
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= 0,07 · X
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CSB,BM
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Stickstoffkonzentration, partikuläre inerte
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organische
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X
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orgN,inert
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= 0,03 · (X
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CSB,inert,BM
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+ X
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CSB,inert,ZB
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)
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Trockensubstanz, anorganischer Anteil X
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anorgTS,ZB
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= f
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B
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* X
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TS,ZB
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Trockensubstanz Belebungsbecken
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𝑇𝑆
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𝐵𝐵
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=
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𝑇𝑆
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𝑅𝑆
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∙ 𝑅𝑉
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(
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1 + 𝑅𝑉
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)
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[
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𝑘𝑔
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𝑚
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3
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]
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Trockensubstanz Bodenschlamm
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𝑇𝑆
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𝐵𝑆
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= 𝑇𝑆
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𝐿𝑎𝑏𝑜𝑟
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∙
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√
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𝑡
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𝐸
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3
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[
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𝑔
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𝐿
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]
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Trockensubstanz Rücklaufschlamm
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𝑇𝑆
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𝑅𝑆
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= 𝑥
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𝑅
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∙ 𝑇𝑆
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𝐵𝑆
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[
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𝑘𝑔
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𝑚
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3
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]
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Volumen Belebungsbecken
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𝑉
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𝐵𝐵
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=
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𝑡
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𝑇𝑆
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∙ Ü𝑆
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𝑑
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𝑇𝑆
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𝐵𝐵
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[
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𝑚³
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]
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𝑉
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𝐵𝐵
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=
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B
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BSB5
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B
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TS
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∗ TS
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BB
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[𝑚
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3
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]
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