20.500.12556/RUL-111345
Formuliranje organskih gnojil iz gnojevke ali digestata
Formulating of organic fertilizers from slurry and digestate
Iz kurjega gnoja, čvrstega dela digestata ali prašičje gnojevke po mehanski separaciji, se lahko formulira tržno zanimivo gnojilo. Z uporabo navedenih treh osnovnih substratov, z dodatki biooglja in vermikulita za izboljšanje lastnosti gnojila ter zmanjšanje neprijetnih vonjav, smo naredili peletitrana organska gnojila. Najboljše lastnosti smo dobili pri mešanici kurjega gnoja in separata prašičje gnojevke. Ugotovili smo, da so bili vhodni substrati za peletiranje preveč vlažni in bi jih bilo potrebno predhodno dosušiti. Na podlagi modelnega scenarija smo dokazali, da je separacija učinkovit postopek, s katerim lahko naredimo hranilno bogato tržno organsko gnojilo ter tako odprodamo presežni del hranil iz intenzivne prašičerejske farme. V čvrsti del preide 25-35 %N, 55-65 %P in 20-30 %K. Posledično je v okolici farme potrebnih manj površin za gnojenje, zmanjšajo se stroški transporta in ob enem varujemo okolje. Zaradi velike vsebnosti rastlinskih hranil, predvsem fosforja, smejo biti odmerki takega gnojila razmeroma majhni, v povprečju do 2,5 t/ha letno, zato kljub veliki vsebnosti organske snovi (20 %C) tako gnojilo ni pomemben tvorec humusa v tleh.
Marketable fertilizer may be formulated from chicken manure, solid digestate or pig slurry after mechanical separation. Using the above three basic substrates with biochar and vermiculite additives to improve fertilizer properties and reduce odors, we make pelletized organic fertilizers. The best properties were obtained with a mixture of chicken manure and separated pig slurry. We found that the input pelletizing substrates were too moist and would need to be pre-dried. Based on the model scenario, we proved that separation is an efficient process by which 25-35 % N, 55-65 % P and 20-30 % K pass into the solid part, and a nutrient-rich marketable organic fertilizer can be made. By selling such fertilizer the excess off nutrients would be removed from an intensive pig farm. As a result, less fertilizing areas around a farm are needed, transport costs are reduced and the environment is protected at the same time. Due to high content of plant nutrients, especially phosphate, the dosages of such fertilizer may be relatively small, averaging up to 2.5 t/ha annually, so despite the high organic matter content (20 % C), such fertilizer is not a significant soil humus producer.
Organska gnojila
gnojevka
digestat
separacija
bilanca hranil
organic fertilizers
slurry
digestate
separation
nutrient balance
true
false
false
[T. Žižek]
Slovenski jezik
Angleški jezik
Magistrsko delo/naloga
2019-09-28 07:45:03
2019-09-28 07:45:09
2022-08-23 03:42:27
0000-00-00 00:00:00
2019
0
0
0000-00-00
NiDoloceno
NiDoloceno
NiDoloceno
0000-00-00
0000-00-00
0000-00-00
631.862(043.2)
171375
9315961
8410.pdf
8410.pdf
1
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https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=123181
Biotehniška fakulteta
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