Biodujų gamybos iš žuvies pramonės šalutinių produktų tyrimas /

• Main Author: Gilytė, Monika
• Other Authors: Venslauskas, Kęstutis
• Format: Master Thesis
• Language: Lithuanian; English
• Published: Institutional Repository of Aleksandras Stulginskis University 2014
• Subjects: salmon (Salmo salar); maize silage; biogas; energy potential; Salmo salar
• Online Access: https://vb.asu.lt/ASU:ELABAETD2134708&prefLang=en_US

Research object: by-products of salmon processing. Research aim: to investigate the energy potential of salmon organic waste, cow manure and maize silage processing them into biogas. Objectives: 1. To determine of biogas production from salmon waste with cow manure and maize mixtures. 2. To determine the energy potential of biogas production using salmon waste. 3. To perform experimental research of biogas production process. 4. To investigate the chemical composition of salmon waste. Research methods: in the research was used mixtures composed of salmon waste with cow manure and salmon waste with maize silage. Investigations were carried in ASU Institute of Energy and Biotechnology Engineering, Biogas laboratory. The investigation of biogas production from fish industry by-products was conducted in 20 litters vertical and horizontal digester applying continuous feeding state. The reactor is maintained at a constant mesophilic 38 ± 0,5 ° C temperature. The research was carried out while feeding the digester with 373,4 g of salmon waste and cow manure and 94,7 g of salmon waste and maize silage. The organic volumetric load was kept at 2 kg/m3d. Research results: biogas yield from 1 kg of cow manure mixed with salmon waste was 700,2 l/kg of dry matter and 836,9 l/kg of dry organic matter. The concentration of methane in biogas produced from maize silage and salmon waste mixture was 69,9 %, while methane concentration from cow manure and salmon waste was 64,4 %. The energy potential from maize silage and salmon waste mixture was by 14 % higher than the salmon waste and cow manure dry matter.