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Optimeringsunderlag för anaerob rötning av flytgödsel från nötkreatur
Växjö University, Faculty of Mathematics/Science/Technology, School of Technology and Design.
2009 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Basis for optimization of anaerobic digestion with cattle manure (English)
Abstract [sv]

Produktions- och optimeringspotentialen vid anaerob rötning av flytgödsel från nötkreatur granskades. Detta genom att, i laboratoriemiljö, undersöka förändringar i processtabilitet, gasproduktion och metanhalt vid tillsats av kycklinggödsel och pH-buffert med flytgödsel från nötkreatur som grundsubstrat. Tillsatsen av pH-buffert underlättade tillväxtfasen för mikroorganismerna, snabbare ökning i metanhalt och den totala metangasproduktionen ökade. Skillnaden var som störst under tillväxtfasen och avtog från stationärfas och framåt. Tillsats av kycklinggödsel har i detta fall inhiberat processen, möjligtvis på grund av ammoniakinhibering vid tillsats av det kväverika substratet som kycklinggödsel är.

Abstract [en]

Production potential and basis for optimization of anaerobic digestion with cattle manure was reviewed by examining process stability, gas production and methane content in a laboratory environment via addition of pH buffer and chicken manure with slurry from cattle manure as basic feedstock. Addition of pH buffer facilitated the growth of microorganisms by more rapid increase in methane content and greater quantities of produced methane gas. The effects were high during the growth stage but decreased, during and after, the stationary phase. Addition of chicken manure caused inhibition of the process, probably caused by ammonia inhibition from high nitrogen content in chicken manure.

Place, publisher, year, edition, pages
2009. , p. 34
Keywords [en]
biogas, anaerobic, digestion, slurry, manure, cattle, chicken, pH, buffering
Keywords [sv]
biogas, anaerob, rötning, flytgödsel, nötkreatur, kycklinggödsel, pH, buffert
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:vxu:diva-5519OAI: oai:DiVA.org:vxu-5519DiVA, id: diva2:225389
Presentation
(Swedish)
Uppsok

Supervisors
Examiners
Available from: 2009-06-30 Created: 2009-06-26 Last updated: 2010-03-10Bibliographically approved

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TD 089/2009(239 kB)413 downloads
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Type fulltextMimetype application/pdf

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