Kompostiranja biootpada – usporedba rotacijskog kompostera valjkastog oblika i otvorene posude Naučni rad
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Kompostiranje je prepoznato kao održiv pristup gospodarenju otpadom u kojem mikroorganizmi tretiraju i stabiliziraju biorazgradivi otpad u aerobnim uvjetima, te se dobiva kompost kao konačni proizvod. U ovom radu uspoređen je proces kompostiranja biootpada u rotacijskom komposteru valjkastog oblika (zatvoreni sustav) i otvorenoj posudi (otvoreni sustav). Tijekom kompostiranja u oba sustava su praćeni slijedeći parametri: temperatura, sadržaji suhe i hlapive tvari, vlage i ugljika, pH vrijednost i električna vodljivost te C/N omjer. Rezultati su pokazali opadajući profil sadržaja vlage, hlapive tvari, ugljika i C/N omjera te rastući profil sadržaja suhe tvari i električne vodljivosti tijekom kompostiranja kod oba sustava. Procjedne vode nastaju samo tijekom prva tri dana kompostiranja i karakterizirane su visokim organskim opterećenjem, visokom koncentracijom amonijaka, niskim pH, visokom vodljivošću i zamućenošću. Podaci o sadržaju organske tvari tijekom procesa kompostiranja analizirani su prema kinetičkom modelu prvog reda. Dobivena su dobra slaganja modela sa eksperimentalnim rezultatima, a brzina razgradnje organske tvari je veća pri kompostiranju u otvorenoj posudi, u odnosu na rotacijski komposter.
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