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

Proposed reaction sheme

1. hydrolysis;2. fermentation;3. anaerobic oxidation;4. acetogenesis;5. acetoclastic methanogenesis;6. hydrogenotrophic methanogenesis

Modeling

Process Intensification – Whey and Cow Manure Co-Digestion Process

Kinetic model

Mass balancesModeling

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

T. versicolor

- 19.62 % of loss of weight- 35 % lignin conversion

- 29.33 % of loss of weight- 55 % lignin conversion

C : N = 36.8 : 1t = 0 day

Process Intensification

Microreactor (10-5 dm3)

Flask (10-1 dm3)Pilot scale

bioreactor(103 dm3)

Lab scale bioreactor (101

dm3)

Intensification of Heat and Mass TransportReduced SizeLarge Surface to Volume Ratio (105 – 106 m2 m-3)Fast Screening of Materials, Catalyst and ProcessesFlexibility in Capacity and in DesignOperating Robustness and ControllabilityLower Cost of Transportation of Material and EnergyReplacing Batch with Continuous ProcessesCOSTS !!!!!Treatment of Waste Streams ?????

Center for Environmental Techology, Brodarski institut d.d.

Lab scale

Pilot scale Designed by:

Anaerobic Bioreactors

Aerobic Bioreactor

Center for Environmental Techology, Brodarski institut d.d.

Lab scale

Mobile Pilot Plant- remote process control over the Internet using remote-control computing software

Designed by:

Anaerobic Bioreactors

Aerobic Bioreactor

Mobile Pilot Plant

Two Solid State Reactors

- solid waste- a(na)erobic conditions- V = 200 dm3

Anaerobic Reactor - liquid waste- a(na)erobic treatment of wastewaters- stirring and pH regulation- V = 300 dm3

UASB Reactor - Upflow Anaerobic Sludge Blanket Reactor - anaerobic treatment of sludge samples - V = 40 dm3

Biogas Production from Brewery Spent Grain

Brewery LaškoCapacity: 100,000,000 L of brew annuallyProject: treatment of brewery waste streams

Wastewater – doneYeast – doneSpent 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 m3/kg dry organic matter → 120-130 m3 biogas/ton

• total usable biogas potential:biogas 1,600,000-2,000,000 m3

50-55 % renewable in total energy (up to 1.5 mio € annual savings)

Process Development - Biogas Production from Brewery Spent Grain

Anaerobic digestion

UASBR

Hydrolysis

HCl

Brewery wastewat

er

Brewery spent grain

Solid phase

Liquid phase

Wastewater

Solid residue

less than 10 %

Biogas

Biogas

Ackonwledgment

17

Naslov prezentacije

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