module 2 discharge consents - swim-h2020 · 1. methods for wastewater characterization in activated...
TRANSCRIPT
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NITROGEN FRACTIONS
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NITROGEN FRACTIONS
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• Ammonia makes up to 60% to
75% of TKN.
• For measurement the nitrogen
fractions directly, standard analysis
of TKN on both filtered and
unfiltered samples as well as
standard analyses of ammonia
need to be done.
• Nitrate/nitrite should be measured
in influent wastewater only if a
significant industrial source
present or in side stream.
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NITROGEN FRACTIONS sON
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• Soluble inorganic nitrogen = ammonia + nitrate/nitrite
• Soluble organic nitrogen =filtered TKN-ammonia
• Particulate organic nitrogen = TKN-filtered TKN
fTKN
Influent
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NITROGEN FRACTIONS
NONBIODEGRADABLE PARTICULATE TKN
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NITROGEN FRACTIONS
NONBIODEGRADABLE PARTICULATE TKN
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nbpON is associated with nbpCOD.
Calculate the fraction FupN
NNHsONTKNpTKN _4
nbpCODFupNnbpON
FupN= N:COD ratio for un-biodegradable particulate COD
Method-1
pCOD
pTKNFupN
pCOD
pTKN
nbpCOD
nbpON
nbpCODpCOD
pTKNnbpON
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NITROGEN FRACTIONS
NONBIODEGRADABLE PARTICULATE TKN
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• nbpON is associated with nbVSS.
• nbpON can be estimated from VSS
and nbVSS
VSS
pTKNfN
NNHsONTKNpTKN _4
nbVSSfNnbpON
fN= fraction of organic nitrogen in
VSS , g N/g VSS
Method-2
VSS
pTKN
nbVSS
nbpON
nbVSSVSS
pTKNnbpON
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NITROGEN FRACTIONS
NON-BIODEGRADABLE SOLUBLE TKN(nbsON)
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NITROGEN FRACTIONS
NON-BIODEGRADABLE SOLUBLE TKN(nbsON)
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fTKN
• Passes through the plant untouched.
• Estimated as approximately 1.5-2% of the Influent TKN.Typically ranges from 1 to 2 mg/l.
• Assuming that all of the soluble biodegradable organic nitrogen is degraded within the
treatment process , then the effluent filtered TKN minus the effluent ammonia will equal
the nbsON.
Effluent
NNHfTKNnbsON _4
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PHOSPHORUS FRACTIONS
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• Knowing the phosphorus fractionation
is important for plants that provide
biological phosphorus removal.
• Orthophosphate(PO4) and soluble
biodegradable phosphorus are taken
up by PAOs in the aerobic zone.
• Orthophosphate(PO4) typically makes
up a large portion of TP in domestic
wastewater(50% to 80%).
• Almost all of the effluent soluble
phosphorus is orthophosphate.
• P fractions are simplified as follows: – TP, total phosphorus .
– Orthophosphate (PO4) represents the two
reactive fractions.
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WASTEWATER CONSTITUENT RELATIONSHIPS
The relationships between various constituents in raw influent establish a frame
of reference and are important for various process considerations. Established
relationships can also be relied upon when data is non-existent. The typical
wastewater constituent relationships are presented below.
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RELATIONSHIP BETWEEN BOD,COD AND TSS
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RELATIONSHIP BETWEEN BOD,COD,TSS, TN, & TP
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EXAMPLE
SAMPLING RESULTS FOR WWTP IN JORDAN
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EXAMPLE- ESTIMATION OF nbsCOD
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EXAMPLE – ESTIMATION OF rbCOD
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PARTICULATE COD/VSS RATIO(Fcv)
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measured
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EXAMPLE – ESTIMATION OF nbpCOD & sbCOD
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RESULTS FOR COD FRACTIONS FOR
THE EXAMPLE
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EXAMPLE – ESTIMATION OF nbVSS
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VSSpCOD
nbpCODnbVSS
3.682.4188.784
1.128
nbVSS
3.682.418128657
1.128
nbVSS
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EXAMPLE – ESTIMATION OF sON
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EXAMPLE – ESTIMATION OF nbpON
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EXAMPLE – ESTIMATION OF nbsON
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EXAMPLE – CALCULATION OF PARTICULATE ORGANIC NITROGEN
FRACTION(Fnox) & AMMONIA FRACTION(Fna)
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88.09.37
5.33
ON
pONFnox
72.01.137
2.994
tTKN
NNHFna
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EXAMPLE – ESTIMATION OF FPO4
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COD,BOD & TSS RELATIONSHIP IN THE EXAMPLE
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MISCONCEPTION ON NITROGEN &
PHOSPHURUS LIMITS
What is the difference between?
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NO3 and NO3-N
NH4 and NH4-N
NH3 and NH3-N
PO4 and PO4-N
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MISCONCEPTION ON NITROGEN &
PHOSPHURUS LIMITS There is a misunderstanding in the way the Nitrogen and Phosphorus
limits are expressed .
Wastewater test results and effluent quality for Nitrogen and Phosphorus
given in standards are expressed in one of the following methods :
• Elemental basis (i.e. NO3-N and NH4-N,PO4-P).
• Molecular basis (i.e. NO3 and NH4,PO4).
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RECOMMENDED TYPICAL FRACTIONS
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HOMEWORK
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Estimate COD, N and P fractions for the sampling results given below
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For further information
Website
www.swim-h2020.eu E: [email protected]
LinkedIn Page
SWIM-H2020 SM LinkedIn
Facebook Page
SWIM-H2020 SM Facebook
SWIM-H2020 SM
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This Project is funded by the European Union
SWIM and Horizon 2020 Support Mechanism Working for a Sustainable Mediterranean, Caring for our Future
Thank you for your attention.
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Appendix
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FLOCCULATED & FILTERED COD(ffCOD) ANALYSIS
• Procedure for filtered & flocculated COD (ffCOD) test :
1 mL of 100 g/L zinc sulfate solution is added to 100 mL of
wastewater
The sample is then mixed vigorously for approximately 1 minute
The sample pH is adjusted to approximately 10.5 using 6 M
sodium hydroxide solution(NaOH).
The sample then is allowed to settle, and a sample of the
supernatant is withdrawn
The supernatant sample is filtered using a 0.45 µm membrane
filter, and the filtrate COD is analyzed.
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REFERENCES
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1. Methods for Wastewater Characterization in Activated Sludge
Modeling, WERF
2. Nutrient Control Design Manual, EPA, August 2010
3. Wastewater Engineering Treatment & Reuse, Metcalf & Eddy, 2004
4. Standard Methods for Wastewater
5. User Manual for BioWin 3., EnviroSim Associates Ltd.
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WHY 5 DAY BOD?
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The five day period was chosen for the test because the Thames
River (of England) requires five days from its origin to join sea,
and if oxygen demand for these five days is determined and
satisfied — the river’s water quality can be protected;
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STANDARD METHODS FOR EXAMINATION OF WATER
& WASTEWATER
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