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Utredning av processavloppsvatten från Thermo Fisher Scientific: Föroreningsinnehåll samt utvärdering av driftförhållanden för bäst reningseffekt
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
2019 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Thermo Fisher Scientific (TFS), ImmunoDiagnostic (ID), Uppsala, produces instruments

for allergy and autoimmunity tests. As TFS ID applied for allowance to increase the

production level, it was given on the condition that the wastewater would be biologically

pre-treated on the site, and a Moving Bed Biofilm Reactor (MBBR) was therefore built.

Another condition was that the effluent wastewater should be of the same quality as

normal household wastewater.

This thesis investigated the contents of acetone, total organic carbon (TOC), biochemical

oxygen demand (BOD

7), nitrogen (Ntot), phosphorus (Ptot) and some toxic substances in

the process wastewater from TFS ID Uppsala. Furthermore, the reduction capacity of the

MBBR was investigated at two different operating modes; step loading and serial

operation. The reduction capacity was determined for the different operating modes by

test sampling and by modelling. The model used was based on the active sludge process

(ASM1) and Monod kinetics. Based on the calculated reduction capacity and studied

litterature, polishing steps that would further reduce the contents of pollutants which did

not meet the criteria of effluent wastewater were suggested. Finally, the future reduction

capacity of the MBBR was investigated, based on the assumption that the production

level would increase in time.

The results showed that the contents of P

tot and BOD7 in the effluent water exceeded

that of normal household wastewater. It was hence suggested that a chemical

precipitaionstep and a disc filer should be installed as complements to the MBBR. These

polishing steps could potentially reduce phosphourous and separate larger

BOD

7-particles by about 90 %.

No significant difference was seen in the reduction capacity of the different opertating

modes based on test sampling. However, the modeling results showed a lower effluent

level of BOD

7 as the tanks were operated in complete series.

No toxic substances were found in the wastewater, but effluent wastewater was still

slightly toxic for green algae. Further investigation is needed to detect what is causing

the toxicity, and to suggest measures that could decrease the pollution from TFS ID

Uppsala.

The future reduction capacity was recognized to be significantly lower than today, as

N

tot was the only substance that met the criteria of normal household wastewater when

the production level increased. To improve the efficiency of the MBBR, it was suggested

to increase the volume of the equalization tank and the amount of carriers in the reactors.

Key words: MBBR, step loadning, serial operation, process wastewater, reduction

capacity, BOD

7, phosphorus, nitrogen, acetone

Place, publisher, year, edition, pages
2019.
Series
UPTEC W, ISSN 1401-5765 ; 19 007
Keywords [en]
MBBR, step loadning, serial operation, process wastewater, reduction capacity, BOD7, phosphorus, nitrogen, acetone
Keywords [sv]
MBBR, stegbeskickning, seriell drift, reningseffekt, processavloppsvatten, BOD7, fosfor, kväve, aceton
National Category
Information Systems
Identifiers
URN: urn:nbn:se:uu:diva-379110OAI: oai:DiVA.org:uu-379110DiVA, id: diva2:1295503
External cooperation
Sweco Environment AB
Educational program
Master Programme in Environmental and Water Engineering
Supervisors
Examiners
Available from: 2019-03-13 Created: 2019-03-11 Last updated: 2019-03-13Bibliographically approved

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