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Anaerobic digestion of brewery spent grain as a mono-substrate in a two-stage anaerobic digestion using solid-state digestion reactor and granulated biomass reactor
Marina Tišma, Bruno Zelić, Romana Marinšek Logar, Mario Panjicko, Gregor Drago Zupančič, 2016, objavljeni znanstveni prispevek na konferenci (vabljeno predavanje)

Opis: 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.
Najdeno v: osebi
Ključne besede: Anaerobic digestion, biogas production, brewery spent grain, microbial biomass, p-cresol degradation, solid state anaerobic digestion
Objavljeno: 21.10.2016; Ogledov: 4201; Prenosov: 0
.pdf Polno besedilo (968,03 KB)

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Razvoj procesa anaerobne razgradnje pivskih tropin iz Pivovarne Laško v laboratorijskem in pilotnem merilu
Gregor Drago Zupančič, Mario Panjicko, Mladen Franjo, 2013, elaborat, predštudija, študija

Najdeno v: osebi
Ključne besede: Anaerobna digestija, Bioplin, pivske tropine
Objavljeno: 26.10.2016; Ogledov: 4299; Prenosov: 0
.pdf Polno besedilo (1,28 MB)

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Dimenzioniranje reaktorjev za hidrolizo aktivnega blata ČN Karton Količevo
Aljaž Klasinc, Gregor Drago Zupančič, 2013, elaborat, predštudija, študija

Najdeno v: osebi
Ključne besede: Aktivno blato, dimenzioniranje reaktorja, hidroliza
Objavljeno: 26.10.2016; Ogledov: 3094; Prenosov: 0
.pdf Polno besedilo (734,34 KB)

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Anaerobna obrada industrijskih otpadnih voda iz prehrambene industrije: opravdanost i iskustva
Mladen Franjo, Mario Panjicko, Gregor Drago Zupančič, Gordana Šelo, 2016, objavljeni znanstveni prispevek na konferenci

Opis: 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.
Najdeno v: osebi
Ključne besede: anaerobna digestija, bioplin, energetska oporaba, otpadna voda
Objavljeno: 08.11.2016; Ogledov: 4137; Prenosov: 0
.pdf Polno besedilo (10,04 MB)

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Anaerobic treatment of excess yeast and waste ethanol from alcohol free beer production for increase of renewable energy use in brewing industry
Goran Lukić, Mario Panjicko, Gregor Drago Zupančič, 2020, objavljeni znanstveni prispevek na konferenci

Opis: In the presented paper we have investigated how large quantities of excess yeast and periodical releases of waste ethanol influence the operation of the anaerobic treatment process in a UASB reactor. The process was tested in a pilot-scale reactor with a design organic load of 16.0 kg/m3/day of COD. Through various stages of the experiment, several possible scenarios were tested, excess yeast was added continuously with concentrations up to 3 vol. %, whereas waste ethanol was added in batches of up to 0.8 % of daily volume load several days a week. The intent was to test real conditions in the treatment process. The whole experiment lasted for 77 days, where the maximum organic load of 24.72 kg/m3/day was successfully achieved with no adverse effects on the efficiency of the reactor performance although it significantly surpassed the design load. The COD efficiency at maximum OLR was 83.1 %, whereas the average was 88.0 %. The average biogas production rate increased from 2,044 m3/m3/day to 4.927 m3/m3/day. The microbial community structure analysis showed significant shifts only in the archaeal community (25 – 30 %) as a good adaptation to the addition of substrates. Monitoring the model brewery in applying the addition of yeast and ethanol to the wastewater treatment showed a 110 % increase in biomethane production. The consequence of the increased biomethane production is that the natural gas substitute ratio could be increased from the current average of 10.7 % to potentially 20.1 %, which is a substantial step towards the goal of renewable energy use.
Najdeno v: osebi
Ključne besede: anaerobic digestion, biogas, brewery yeast, renewable energy, waste ethanol
Objavljeno: 10.06.2021; Ogledov: 1156; Prenosov: 6
.pdf Polno besedilo (825,82 KB)
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