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Modification of a Moving Bed Biofilm Reactor(MBBR) due to radically changed process conditions: A case study of Kvarnsveden paper mill
Dalarna University, School of Technology and Business Studies, Energy Technology.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Papermaking process require large amounts of energy and water; therefore, pulp and paper

mills can be potentially very polluting. The wastewater resulting from the papermaking

process must be carefully managed as it is very rich in dissolved organic matter and contain

compounds that make it difficult to treat. MBBR technology emerged as a possibility to

increase the treatment capacity and to make more compact treatment systems designed to

remove high organic loads, since in addition to having biomass in suspension as the

activated sludge process, also has biomass adhered to plastic supports. This research was

commissioned by Stora Enso Kvarnsveden and emerged in need of a bioreactor

modification due to reduction of the wastewater load after the closure of PM11 in 2013 and

PM8 in 2017. An evaluation of the performance of bioreactors is necessary with possible

results to only run one bioreactor in the future and save energy. For performance analysis,

two weeks of measurements were performed, one with the two bioreactors running at the

same time and one with only K150 reactor running, trying to simulate what happens if one

of them is stopped. Analysis of the main operating parameters of the MBBR system were

evaluated during this research. As result, it was recommended an action to remove the

excess of adhered biomass and an increase of the filling rating to 50%, in order to optimize

TOC reduction.

Place, publisher, year, edition, pages
2018.
Keywords [en]
Moving Bed Biofilm Reactor, Pulp and Paper Wastewater, Performance Evaluation, Energy Efficient.
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:du-29077OAI: oai:DiVA.org:du-29077DiVA, id: diva2:1270348
Available from: 2018-12-13 Created: 2018-12-13

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • chicago-author-date
  • chicago-note-bibliography
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NB
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  • Other locale
More languages
Output format
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