Intensification of Agro and Food Industry Waste Biodegradation

Intensification of Agro and Food Industry Waste Biodegradation Process Marina Tišma, Natalija Velić, Mario Panjičko, Bruno Zelić

Outlook Process Intensification - Modeling, Simulation and Optimization - Waste Preatretment - Scale-up – Mobile Pilot Plant

Process Intensification – Modeling, Simulation, Optimization B. Zelić, Đ. Vasić-Rački, Kem. Ind. , 54 (2005) 241 -254

Process Intensification – Whey and Cow Manure Co-Digestion Process Optimization (A) mesophilic conditions without alkalinity addition; (B) thermophilic conditions without alkalinity addition; (C) mesophilic conditions with alkalinity addition; (D) thermophilic conditions with alkalinity addition A. Hublin, T. Ignjatić Zokić, B. Zelić, Biotechnol. Bioproc. Eng. , 17 (2012) 1284 -1293

Process Intensification – Whey and Cow Manure Co-Digestion Process Modeling Proposed reaction sheme 1. hydrolysis; 2. fermentation; 3. anaerobic oxidation; 4. acetogenesis; 5. acetoclastic methanogenesis; 6. hydrogenotrophic methanogenesis

Process Intensification – Whey and Cow Manure Co-Digestion Process Modeling Kinetic model Mass balances

Process Intensification – Whey and Cow Manure Co-Digestion Process Validation and Simulation A. Hublin, B. Zelić, Waste Manage. Res. , 31 (2013) 353 -360

Process Intensification – Waste Preatretement Degradation of lignin in sugar beet waste by white rot fungi Trametes versicolor and Phanerochaete chrysosporium cultivated in solid state culture

Process Intensification – Waste Preatretement Sugar beet waste degradation after 30 days of solid state fermentation P. chrysosporium -19. 62 % of loss of weight % 35 -lignin conversion C : N = 36. 8 : 1 t = 0 day T. versicolor -29. 33 % of loss of weight % 55 -lignin conversion

Process Intensification Microreactor (10 -5 dm 3( Lab Flask (10 -1 dm 3( Intensification of Heat and Mass Transport Reduced Size Large Surface to Volume Ratio (105 – 106 m 2 m 3) Fast Screening of Materials, Catalyst and Processes Flexibility in Capacity and in Design Operating Robustness and Controllability Lower Cost of Transportation of Material and Energy Replacing Batch with Continuous Processes COSTS!!!!! Treatment of Waste Streams? ? ? Pilot scale bioreactor (101 dm 3( bioreactor(103 dm 3(

Center for Environmental Techology, Brodarski institut d. d. Anaerobic Bioreactors Aerobic Bioreactor Lab scale Pilot scale Designed by:

Center for Environmental Techology, Brodarski institut d. d. Anaerobic Bioreactors Aerobic Bioreactor Lab scale Mobile Pilot Plant -remote process control over the Internet using remote-control computing software Designed by:

Mobile Pilot Plant Two Solid State Reactors -solid waste -a)na(erobic conditions - V = 200 dm 3 Anaerobic Reactor UASB Reactor - liquid waste -Upflow Anaerobic -a)na(erobic treatment of Sludge Blanket Reactor wastewaters -anaerobic treatment of -stirring and p. H sludge samples regulation -V = 40 dm 3 3

Biogas Production from Brewery Spent Grain Brewery Laško Capacity: 100, 000 L of brew annually Project: treatment of brewery waste streams Wastewater – done Yeast – done Spent grain – development in progress Brewery spent grain: • lignocellulosic material containing about 17 % cellulose, 28 % non-cellulosic polysaccharides, mostly arabinoxylans, and 28 % lignin • 0. 6 -1. 2 m 3/kg dry organic matter → 120130 m 3 biogas/ton • total usable biogas potential: biogas 1, 600, 000 -2, 000 m 3

Process Development - Biogas Production from Brewery Spent Grain Brewery wastewater Biogas HC l Brewery spent grain Liquid phase Anaerobic digestion Hydrolysis Solid phase Wastewate Biogas r UASBR Solid residue less than 10 %

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