magistrsko delo
Evgen Pulko (Author), Rok Mihelič (Mentor), Marjetka Suhadolc (Co-mentor)

Abstract

Namen naloge je bil preučiti vpliv dodatka EM Bokashi starter na proces kompostiranja bioloških odpadkov v primerjavi z ustaljeno prakso kompostarne CRO Vrhnika d.o.o. V poskusu smo v treh ponovitvah kompostirali mešanico biotsko razgradljivih odpadkov, ki smo jim v obravnavanju B dodali mikrobni inokulum EM Bokashi Starter (1 L/m3) ter proces primerjali s kontrolnim obravnavanjem brez dodatka (K). Kompostiranje smo izvajali prve štiri tedne v zaprti hali, naslednje štiri tedne pa pod nadstreškom. V celotnem obdobju smo dnevno spremljali potek temperature, enkrat tedensko pH, elektroprevodnost in nitratni dušik. Na začetku in koncu poskusa smo v kompostu izmerili vsebnost elementov. Izvedli smo tudi rastni test s kitajskim zeljem (Brassica pekinensis L.) in kalilni test z vrtno krešo (Lepidium satium L.). Pri obeh obravnavanjih je bil rastlinam dodan 2 % masni odmerek komposta, če smo ga vmešali v že pripravljen šotni rastni substrat. Kalilni test s krešo je pokazal, da je v vodnem ekstraktu komposta pri koncentraciji 100 g/L kalivost pri B boljša kot pri K. Glede na začetno vsebnost mase smo izračunali, da je se je pri K razgradilo 33 % pri B pa 35 % organske snovi v suhi snovi. Izgube hranil (N, P, K) so bile majhne, z izjemo žvepla, ki se ga je v obeh obravnavanjih izgubilo ca. 30 %. Kompost je bil po dveh mesecih pri obeh obravnavanjih biološko stabilen; stopnja dihanja je bila pod 500 mg CO2-C/100 g. Sklenemo lahko, da dodatek EM Bokashi starter ni značilno pospešil razgradnje organske snovi, je pa vplival na izboljšanje sposobnosti kalitve semen vrtne kreše v primerjavi s K.

Keywords

kompostiranje;kompost;biološki odpadki;EM Bokash starter;mikroorganizmi;humus;gnojila;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [E. Pulko]
UDC: 631.86:631.879.4:579.64(043.2)
COBISS: 8916857 Link will open in a new window
Views: 960
Downloads: 408
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Other data

Secondary language: English
Secondary title: Impact of EM Bokashi starter on the composting process of separatly collected biowaste
Secondary abstract: The purpose of the project was to study the impact of the EM Bokashi starter on the biological waste composting process compared to the established practice of the CRO Vrhnika. In a three-repetition experiment, a mixture of biodegradable waste was composted either by the addition of microbial inoculant, the EM Bokashi Starter (1 L/m3; treatment B) and compared the process with a control treatment with no additive (K). In the first four weeks composting was performed in a closed hall, and semi-closed under the roof in the next four weeks. During the whole period, we monitored daily the course of temperature, once a week pH, electrical conductivity and nitric nitrogen. At the beginning and end of the experiment we measured the content of the elements in the compost. We also carried out a growth test with Chinese cabbage (Brassica pekinensis L.) and a germination test with a garden cress (Lepidium satium L.). Compost samples from the both treatments, were suitable for cabbage at 2 % by weight when mixed into the already prepared peat growing medium. The cress test showed that the water extract of compost (100 g/L) at B is not phytotoxic, but at K it is. According to the initial mass content, it was calculated that 35 % of organic matter was degraded in B compared to 33 % at K. Nutrient losses (N, P, K) were small, with the exception of sulfur, which was lost by 30 % in the both treatments. After two months, compost was biologically stable in both treatments; the respiration rate was below 500 mg CO2-C/100 g. We can conclude that the addition of the EM Bokashi starter did not significantly accelerate the degradation of the organic matter, but it has improved the germination capacity of garden cress seeds compared to the K.
Secondary keywords: composting;compost;biowaste;EM Bokashi starter;microorganisms;humus;fertilizers;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Pages: X, 44 f., [4] f. pril.
ID: 10915564