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Title:Določitev merilne negotovosti vzorčenja in priprave v digestatu na podlagi meritev vsebnosti težkih kovin, skupnega dušika in organske snovi : magistrsko delo
Authors:Novak, Tina (Author)
Kokalj, Filip (Mentor) More about this mentor... New window
Drame, Petra (Co-mentor)
Files:.pdf MAG_Novak_Tina_2019.pdf (2,91 MB)
 
Language:Slovenian
Work type:Master's thesis/paper (mb22)
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:Anaerobna digestija (AD) je biološki proces, ki preoblikuje začetni substrat (ingestat) v želeni produkt (bioplin) in v trdni tekoči stranski produkt (digestat oziroma pregnito blato). Je široko uporabljena in fleksibilna tehnologija. Zaradi njene fleksibilnosti so za surovino pri postopku primerne različne vrste organskih snovi. Za surovino lahko zato uporabimo organske komunalne odpadke, blato pri čiščenju odpadnih voda, odpadke iz živilskopredelovalne industrije in kmetijske odpadke, kot so gnoj in ostanki rastlin. Digestat z bioplinom predstavlja končne izdelke anaerobne digestije (AD). Digestat je snov, bogata s hranili in se lahko uporablja kot gnojilo. Digestat ni kompost, čeprav ima nekaj podobnih značilnosti, razlika med njima je ta, da kompost proizvajajo aerobni mikroorganizmi, kar pomeni, da je za proces potreben kisik. Z uporabo digestata, namesto sintetičnih gnojil, ki so pridobljena iz zemeljskega plina, lahko prihranimo energijo, zmanjšamo porabo fosilnih goriv in ogljični odtis. V digestatu so vedno prisotni dušik, fosfor in kalij, teh pa v bioplinu ne najdemo. Glavna pomanjkljivost digestata je, da je mešanica hranil vedno vnaprej določena in je ni mogoče spremeniti. Namen magistrske naloge je bil določiti vsebnost težkih kovin, skupnega dušika in organske snovi v digestatu ter njihove merilne negotovosti. Merilna negotovost pomeni dvom v meritve, ki so bile izvedene. Je parameter, ki označuje območje razpršenih vrednosti in jih je mogoče smiselno pripisati merjeni veličini. V območju razpršenosti se nahaja prava vrednost rezultata. V teoretičnem delu so podrobneje opisane značilnosti anaerobne digestije in digestata ter merilne negotovosti. V eksperimentalnem delu pa so prikazane metode in rezultati določevanja merilne negotovosti vzorčenja in priprave v digestatu na podlagi meritev vsebnosti naših parametrov.
Keywords:Anaerobna digestija, digestat, merilna negotovost
Year of publishing:2019
Place of performance:Maribor
Publisher:[T. Novak]
Number of pages:X, 52 str.
Source:Maribor
UDC:628.336.5:66.098.4(043.2)
COBISS_ID:23080470 Link is opened in a new window
NUK URN:URN:SI:UM:DK:TTFZMGLQ
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
Views:113
Downloads:26
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Categories:KTFMB - FS
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Secondary language

Language:English
Title:Determination of measurement uncertainty of sampling and preparation of the digestate based on measurements of heavy metals, total nitrogen and organic matter content
Abstract:Anaerobic digestion (AD) is a biological process that transforms the starting substrate (ingestate) into the desired product (biogas) and into a solid liquid by-product digestate. It is a widely used and flexible technology. Due to its flexibility, different types of organic matter are suitable for the raw material of the process. Organic municipal waste, sewage sludge, waste from the food processing industry and agricultural waste such as manure and plant residues can therefore be used as raw material. Digestate with biogas represents the end products of anaerobic digestion (AD). Digestate is a nutrient-rich substance that can be used as a fertilizer. Digestate is not compost, although it has some similar characteristics, the difference between them is that compost is produced by aerobic microorganisms, which means that oxygen is required for the process. Using digestate instead of synthetic fertilizers derived from natural gas can save energy, reduce fossil fuel consumption and carbon footprint. Nitrogen, phosphorus and potassium are always present in the digestate and are not found in biogas. The main disadvantage of digestate is that the nutrient mix is always pre-determined and cannot be changed. The purpose of the master's thesis was to determine the content of heavy metals, total nitrogen and organic matter in the digestate and their measurement uncertainty. Measurement uncertainty implies doubts about the measurements that have been made. It is a parameter that indicates the range of scattered values that can be reasonably attributed to the measured magnitude. The true value of the result is found in the dispersion zone. The theoretical part describes in more detail the characteristics of anaerobic digestion and digestate and the measurement uncertainty. In the experimental part the methods and results of determining the uncertainty of sampling and preparation in the digestate are presented on the basis of measurements of the content of our parameters.
Keywords:Anaerobic digestion, Digestate, Measurement uncertainty


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