Monitoring dissolved COD in a pulp mill wastewater treatment plant by measuring total dissolved solids with a refractometer

Sakari Toivakainen; Riku Kopra; Heikki Hannukainen; Timo Laukkanen; Olli Dahl

Monitoring dissolved COD in a pulp mill wastewater treatment plant by measuring total dissolved solids with a refractometer

Sakari Toivakainen^*, Riku Kopra, Heikki Hannukainen, Timo Laukkanen, Olli Dahl

^*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Lehtiartikkeli › Review Article › vertaisarvioitu

Abstrakti

The measurement of total dissolved solids (TDS) and its correlation to dissolved chemical oxygen demand (DCOD) in different kraft pulp mill wastewater solutions was studied at laboratory scale with an online refractometer. The study concluded that TDS can be measured successfully at a kraft pulp mill wastewater treatment plant in spite of suspended solids such as fibres or biosludge. The correlation between DCOD and refractometer measured TDS was very strong. The estimated ratio between the changes in DCOD and in TDS for lignin solutions was 1.81 to 1.85 and for kraft pulp mill wastewater 1.13 to 1.29. Accordingly the removal of DCOD in a plug flow aeration basin of an activated sludge process could be monitored with refractometer TDS measurements.

Alkuperäiskieli	Englanti
Sivut	55-60
Sivumäärä	6
Julkaisu	APPITA Journal
Vuosikerta	70
Numero	1
Tila	Julkaistu - 1 tammik. 2017
OKM-julkaisutyyppi	A2 Katsausartikkeli tieteellisessä aikakauslehdessä

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title = "Monitoring dissolved COD in a pulp mill wastewater treatment plant by measuring total dissolved solids with a refractometer",

abstract = "The measurement of total dissolved solids (TDS) and its correlation to dissolved chemical oxygen demand (DCOD) in different kraft pulp mill wastewater solutions was studied at laboratory scale with an online refractometer. The study concluded that TDS can be measured successfully at a kraft pulp mill wastewater treatment plant in spite of suspended solids such as fibres or biosludge. The correlation between DCOD and refractometer measured TDS was very strong. The estimated ratio between the changes in DCOD and in TDS for lignin solutions was 1.81 to 1.85 and for kraft pulp mill wastewater 1.13 to 1.29. Accordingly the removal of DCOD in a plug flow aeration basin of an activated sludge process could be monitored with refractometer TDS measurements.",

keywords = "Activated sludge process, Chemical oxygen demand, COD removal, Online measurement, Process control, Pulp mill wastewater, Refractometer, Total dissolved solids",

author = "Sakari Toivakainen and Riku Kopra and Heikki Hannukainen and Timo Laukkanen and Olli Dahl",

year = "2017",

month = jan,

day = "1",

language = "English",

volume = "70",

pages = "55--60",

journal = "APPITA Journal",

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TY - JOUR

T1 - Monitoring dissolved COD in a pulp mill wastewater treatment plant by measuring total dissolved solids with a refractometer

AU - Toivakainen, Sakari

AU - Kopra, Riku

AU - Hannukainen, Heikki

AU - Laukkanen, Timo

AU - Dahl, Olli

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The measurement of total dissolved solids (TDS) and its correlation to dissolved chemical oxygen demand (DCOD) in different kraft pulp mill wastewater solutions was studied at laboratory scale with an online refractometer. The study concluded that TDS can be measured successfully at a kraft pulp mill wastewater treatment plant in spite of suspended solids such as fibres or biosludge. The correlation between DCOD and refractometer measured TDS was very strong. The estimated ratio between the changes in DCOD and in TDS for lignin solutions was 1.81 to 1.85 and for kraft pulp mill wastewater 1.13 to 1.29. Accordingly the removal of DCOD in a plug flow aeration basin of an activated sludge process could be monitored with refractometer TDS measurements.

AB - The measurement of total dissolved solids (TDS) and its correlation to dissolved chemical oxygen demand (DCOD) in different kraft pulp mill wastewater solutions was studied at laboratory scale with an online refractometer. The study concluded that TDS can be measured successfully at a kraft pulp mill wastewater treatment plant in spite of suspended solids such as fibres or biosludge. The correlation between DCOD and refractometer measured TDS was very strong. The estimated ratio between the changes in DCOD and in TDS for lignin solutions was 1.81 to 1.85 and for kraft pulp mill wastewater 1.13 to 1.29. Accordingly the removal of DCOD in a plug flow aeration basin of an activated sludge process could be monitored with refractometer TDS measurements.

KW - Activated sludge process

KW - Chemical oxygen demand

KW - COD removal

KW - Online measurement

KW - Process control

KW - Pulp mill wastewater

KW - Refractometer

KW - Total dissolved solids

UR - http://www.scopus.com/inward/record.url?scp=85018873099&partnerID=8YFLogxK

M3 - Review Article

AN - SCOPUS:85018873099

SN - 1038-6807

VL - 70

SP - 55

EP - 60

JO - APPITA Journal

JF - APPITA Journal

IS - 1

ER -

Monitoring dissolved COD in a pulp mill wastewater treatment plant by measuring total dissolved solids with a refractometer

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