The main purpose of this study was to determine if aeration and extraction time influence on the properties of extracts produced under different conditions.
The leachates for our experiment were obtained from five different kinds of vermicompost (from horse manure, digestate, marc, apple pomace and from kitchen waste). Has always been prepared 1kg of vermikompost and using special extraction equipment for leaching in 9 liters of water. Attempt always proceeded 48 hours and at predetermined intervals, were taken control samples. Every 1h, 6h, 12h, 24h and 48h. The leachates were prepared in two variants. The first variant was without aeration at a constant temperature 30 °C and stirring 750 rpm. The second variant was with aeration at a constant temperature 30 °C and stirring 750 rpm.
In this work we are evaluated in terms of leachate contents of ammonium nitrogen(N-NH4+), nitrate nitrogen (NO3--N), total nitrogen, dissolved organic carbon (DOC). Analytical equipment placed on the apparatus measured the remaining variables evaluated in this work - pH, conductivity and dissolved oxygen.
The leachates produced with aeration generally reached higher values than the leachates produced without aeration. This difference was only 6%. The highest increase during exgraction was the ammonium nitrogen in a variant with aeration. Other endpoints were higher by only a few percent .
The extraction time effect on the properties of extracts was clear. The highest rates of increase was in the first 24 hours, when values were rising most. The remaining 24 hours have had such importance. Time certainly had a great influence on the properties of the extracts, but the last 24 hours of leaching characteristics has not changed significantly, so it is not necessary to infuse for 48 hours.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:258490 |
| Date | January 2016 |
| Creators | Kahanec, Julius |
| Contributors | Hanč, Aleš, Pavel, Pavel |
| Publisher | Česká zemědělská univerzita v Praze |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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