Biogas cogeneration plant on biodegradable waste

Anaerobna digestija, proces proizvodnje bioplina, ima ekonomske i ekološke prednosti. Veliki energetski potencijal stoji iza bioplina odnosno bioplinskih postrojenja te je ono tema ovog diplomskog rada. Proizvodnja energije predmetnog bioplinskog postrojenja iz bioplina ostvaruje se plinskim Otto motorom. Spoznajom kako je ukupna korisnost, uključujući električnu i toplinsku energiju, plinskog motora 40,9 % razmatra se alternativa upotrebe bioplina (primarne energije). S tim ciljem je u prvom dijelu rada opisano i analizirano predmetno bioplinsko postrojenje. Analiza uključuje masenu bilancu, energetsku bilancu te ekonomsku bilancu bioplinskog postrojenja. Nadalje, u Hrvatskoj nije definirana feed-in tarifa za alternativno unapređenje bioplina i injektiranje u plinsku mrežu. Cilj rada bilo je odrediti feed-in tarifu takvog sustava nakon implementacije adekvatne tehnologije, što je i analizirano u drugom dijelu rada. Ideja tijekom određivanja feed-in tarife za biometan je ostvarivanje istih prihoda kao u referentnoj 2018. godini predmetnog bioplinskog postrojenja te usporedba sa sadašnjim za električnu energiju.Anaerobic digestion, the biogas production process has economic and environmental benefits. The great energy potential lies behind biogas (biogas plants) and is the topic of this master's theses. The energy production of the biogas plant in question is generated by the Otto gas engine. Knowing how the overall utility of Otto gas engine, including electric and termal energy, is 40,9 % generate a desire to consider alternatives to gas engine. With this aim, the biogas plant in question was described and analyzed in the first part of this paper. The analysis includes the mass balance, the energy balance and the economic balance of the biogas plant. Furthermore, there was no feed-in tariff for alternative upgrading of biogas and injection in domestic gas pipeline in Croatia. The aim of the master's theses was to determine the feed-in tariff of biogas plant after the implementation of adequate technology, which i also analyzed in the second part of the paper. The idea when determining the feed-in tariff for biomethane is to achieve the same revenue as in the reference 2018. of the biogas plant in question and a comparison with the current feed-in tariff for electricity