21. Anaerobna obrada industrijskih otpadnih voda iz prehrambene industrije: opravdanost i iskustvaMario Panjicko, Gregor Drago Zupančič, Gordana Šelo, Mladen Franjo, 2016, published scientific conference contribution Abstract: U radu je prikazana opravdanost primjene anaerobne obrade otpadnih voda iz prehrambene industrije na primjeru pivarske i mljekarske industrije. Otpadne vode prehrambene industrije većinom se ispuštaju u javni kanalizacijski sustav ili obrađuju aerobnim biološkim metodama. Porastom cijena energije i popularizacijom obnovljivih izvora, sve se više razmatra anaerobna obrada otpadnih voda prehrambene industrije, obzirom na visok sadržaj organskih tvari u njima. Te vode u pravilu imaju visoko organsko opterećenje (vrijednosti kemijske potrošnje kisika (KPK) otpadne vode pivarske industrije se kreću od 2500-4000 mg/L, a mljekarske industrije od 1500-3000 mg/L), koje je primjenom anaerobne obrade moguće sniziti do 90 %. Tako obrađene vode su, prema KPK vrijednostima, sličnije komunalnim otpadnim vodama te stoga i prihvatljivije za ispuštanje u javni kanalizacijski sustav. Uz snižavanje vrijednosti KPK, anaerobnom obradom proizvodi se bioplin, čijim je iskorištavanjem moguće supstituirati do 20 % prirodnog plina koji se koristi u proizvodnom procesu. Također, otpadnoj vodi moguće je dodavati i drugi tekući otpad (npr. kvasac, sirutka, proizvodi s isteklim rokom trajanja), koji može dodatno povećati proizvodnju bioplina do 60 %, bez negativnih posljedica na provedbu procesa. Uzimajući u obzir snižavanje pristojbi na otpadne vode i smanjenje potrošnje prirodnog plina, period povrata investicije u ovakve sustave iznosi od 3 do 5 godina što njihovu primjenu čini ekonomski opravdanom.
Keywords: anaerobna digestija, bioplin, energetska oporaba, otpadna voda
Published in RUNG: 08.11.2016; Views: 6285; Downloads: 0
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29. Določitev parametrov procesa anaerobno-aerobnega čiščenja odpadne vode in hidrolize odpadnega biološkega blata VIPAP VIDEM KRŠKO : (2. faza- pilotni testi, DIP odpadna voda)Gregor Drago Zupančič, Aleksandra Račič Kozmus, Nina Novak, Aljaž Klasinc, 2013, final research report Keywords: Anaerobna obdelava odpadne vode, Blato iz čistilnih naprav, Deinking, Papirniška odpadna voda, Termo-kemijska hidroliza
Published in RUNG: 21.10.2016; Views: 5748; Downloads: 0
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30. Anaerobic digestion of brewery spent grain as a mono-substrate in a two-stage anaerobic digestion using solid-state digestion reactor and granulated biomass reactorMario Panjicko, Gregor Drago Zupančič, Romana Marinšek Logar, Marina Tišma, Bruno Zelić, 2016, published scientific conference contribution (invited lecture) Abstract: Anaerobic digestion of brewery spent grain as a mono-substrate was studied. Anaerobic digestion was phase separated in solid state anaerobic digestion reactor, where mostly microbiological hydrolysis and acidogenesis and granular biomass reactor where mostly methanogenesis was performed. The overall process exhibited total solids degradation efficiency between 73.6 and 80.4%. Average specific biogas production was 424±36 L/kg, whereas biomethane production was 230±34 L/kg of brewery spent grain total solids. Granular biomass after adaptation exhibited stabile operation at C-N ratios as low as 0.2 – 0.3, which is rare in anaerobic digestion. P-cresol as a degradation product was present in concentrations up to 45 mg/L and during the process successfully degraded. The excellent adaptability of the granular biomass is confirmed by 67% shift in bacterial and a 32% shift in archaeal community structure in granular biomass reactor after 198 days of successful operation.
Keywords: Anaerobic digestion, biogas production, brewery spent grain, microbial biomass, p-cresol degradation, solid state anaerobic digestion
Published in RUNG: 21.10.2016; Views: 6715; Downloads: 0
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