Anaerobic digestion of specific biodegradable waste and final disposal

Ovaj rad istražuje učinkovitost primjene različitih razina digestiranog ostatka, dobivenog nakon anaerobne digestije (AD) mesno-koštanog brašna (MKB), na morfološka i mineralna svojstva kukuruza. Istraživanje je provedeno u trajanju od dvije godine, a sastojalo se od osam tretmana: kontrola (bez gnojiva); samo mineralna gnojidba; tretmani s najmanjom, srednjom i maksimalnom dozom digestiranog MKB-a; gnojidba minimalnom, srednjom i maksimalnom dozom digestiranog ostatka u kombinaciji s mineralnim gnojivom. Kombinacija tretmana s mineralnim gnojivom i različitom dozom ostatka anaerobne digestije, povećala je prinos mase biljke, bile su veće i imale više lišća. Sadržaj mineralnih tvari bio je prosječne vrijednosti, kako u biljnom materijalu tako i u jezgri. Varijacije vrijednosti uvjetovane su ukupnom masom i ionskim interakcijama. MKB nakon tretmana AD moguće je primijeniti kao organsko gnojivo. Ima veće hranjive vrijednosti i, kao takvo, prikladno je za tretiranje poljoprivrednih biljaka, posebno u ratarstvu.The present paper investigates the effectiveness of different levels of applied digested residue obtained after anaerobic digestion (AD) of meat-bone meal (MBM) on the morphologic and mineral characteristics of corn. The experiment was conducted in duration of two years and consisted of eight treatments: control (without any fertilizer); mineral fertilization only; treatments with minimum, medium and maximum dosage of digested MBM; fertilization of minimum, medium and maximum dosages of AD residue combined with mineral fertilizer. By combination of treatments with mineral fertilizer and different rates of AD residue, plants increased mass yield, they were larger and had more leaves. Content of mineral substances was within average values, both in plant material and in kernel, and variations in values were conditioned by total mass and ion interactions. MBM after AD treatment is possible to be applied as organic fertilizer. It has higher nutritive value and, as such, is suitable for treatment of agricultural plants, especially in crop production