TRANSBIO. Aplicación final: de los residuos a la energía y el abono

BioTRANSformation of by-products from fruit and vegetable processing industry into valuable

BIOproducts

A European Project supported within the Seventh Framework Programme for Research and Technological Development

Fil ip Velghe, OWS, 03/11/2015

Company profile


DRANCO technology – UG, 1983 (pilot in 1984)

Founded in 1988

Consolidated sales (2011-2013): 19 million €/yr

Export: 90%

70 employees

Head office: Gent, Belgium Affiliates: OWS Inc., Dayton, Ohio, USA DRANCO N.V. BES GmbH, Germany Partner: DJK International, Tokyo, Japan

Company profile


BIOGAS CONSULTING & SUPPORT

Biogas consultancy and support



Expert in anaerobic digestion processes with

25+ years of experience

Covering all possible AD processes available

worldwide

Unique combination of both biological and

mechanical/technical knowledge

Independent advice and guidance at each level

of AD

Biogas consultancy and support



Feasibility testing of the AD process

o Over the whole process chain: from

pretreatment over AD to post-treatment

o All necessary information to elaborate a full-

scale project

Continuous assistance for full-scale plants

o Start-up of AD plants

o Revamping of unstable AD plants

o Maintaining a stable AD process

o Increasing performance

Organic waste options



Treatment technologies for organic waste

o Landfill

o Incineration

o Composting

o Anaerobic digestion

o New biotechnological approaches

Landfill



Not sustainable

No recuperation of materials

No recuperation of nutrients

Sometimes recuperation of energy (landfill gas)

o Low efficiency (suboptimal conditions)

o Many leakages CH4 emissions to air

Discouraged in many countries (landfill ban /

taxes)

Incineration



Not sustainable

Limited recuperation of materials (e.g. metals from MSW)

No recuperation of nutrients (ashes are landfilled / low plant

availability of ash nutrients

Recuperation of energy

o Low efficiency (high moisture content in most organic waste)

Composting



Sustainable

Stabilization of organic waste

Recuperation of materials (soil improver)

Recuperation of nutrients as compost

No recovery of energy

Anaerobic digestion



Sustainable

Stabilization of organic waste

Recuperation of materials (soil improver)

Recuperation of nutrients as digestate or derived products (compost,

effluent, dewatered or dried cake…)

Recovery of energy (biogas)

Anaerobic digestion



CH4 + CO2

Organic matter

Consortium

of bacteria 35 °C - 55 °C

O2

BIOGAS = ENERGY

X

digestate

Anaerobic digestion



Several types o Mesophilic – thermophilic

o Wet – dry digestion

o Single stage – multiple stage

o Monodigestion – co-digestion

o Batch – semi-continuous – continuous

o Hydraulic mixing – paddle mixers – propeller mixers

– pneumatic mixing – percolation – external mixing

Anaerobic digestion



Anaerobic

digestion

organic waste compost

Anaerobic digestion



spent biomass

anaerobic

digestion

compost

organic waste

bioproducts

biorefinerypretreatment

TRANSBIO


Using by-products from food industry (e.g. from corn, potatoes,

banana,...)

Create high value bio-products:

o Enzymes

o Biopolymers: PHB

o Platform chemical: succinic acid

Remaining organic fraction of biotechnological processes: anaerobic

digestion

GOAL: reduce waste, maximise recycling (energy, fertilizer)

2 Steps: 1) 2 weeks anaerobic digestion test: BPP

2) Continuous digestion test

TRANSBIO


Biogas production potential of untreated by-products

EUROPE

0

100

200

300

400

500

600

700

0 2 4 6 8 10 12 14

Bio

gas

pro

du

ctio

n (

NL/

kg T

S)

Test duration (Days)

Broccoli Cardoon Green bean Lettuce Potato Sweet corn

TRANSBIO


Biogas production potential of TRANSBIO residues

COSTA-RICA

0.0

100.0

200.0

300.0

400.0

500.0

600.0

700.0

0 2 4 6 8 10 12 14

Bio

gas

pro

du

ctio

n (

NL/

kg T

S)

Test duration (Days)

pressed banana pulp residue (CITA) pressed banana pulp residue (2) (CITA)

TRANSBIO


All basic wastes suitable for anaerobic digestion

o Good C/N ratio for anaerobic digestion

o High degradability to biogas

o Good methane content (50%)

What with solid fraction after hydrolysation of these wastes

to extract sugars for TRANSBIO fermentation processes?

TRANSBIO


Biogas production potential of TRANSBIO wastes

SWEET CORN – solids after hydrolysation

TRANSBIO


Biogas production potential of sweet corn residuals after

hydrolysis

o Optimal C/N ratio for anaerobic digestion



o No significant decrease in biogas potential of rest material

after hydrolysis compared to untreated by-product

Ideal feedstock for AD

TRANSBIO


Biogas production potential of TRANSBIO wastes

POTATOES – solids after hydrolysis

TRANSBIO


Biogas production potential of potato pulp residuals after

hydrolysis

o Good C/N ratio for anaerobic digestion, but at lower limit



o No significant decrease in biogas potential of rest material

after hydrolysis compared to untreated by-product

o High levels of Na and K in solid fraction (potentially inhibitory

effect on AD)

Suitable feedstock for AD?

TRANSBIO


Continuous tests on sweet corn and potato pulp (after hydrolysis)

= simulation of full-scale digestion (loading rate, residence time,…)

Mesophilic (37°C) & Thermophilic (52°C)

Goal:

o evaluate process on long term

o stabile process

o toxic effects

o nutrients deficiency

Short term BPP-tests: promising results on hydrolysates of sweet

corn and potato pulp

TRANSBIO



Input

TRANSBIO



Biogas productivity

TRANSBIO CONCLUSIONS


Continuous tests on sweet corn solids after hydrolysis

o Stable process at both 37°C and 52°C

o Nitrogen and micronutrient addition is needed

o Thermophilic highest loading rate

Continuous tests on potato pulp solids after hydrolysis

o Instable process at 52°C (related to high K conc)

o Stable process at 37°C

o Only micronutrient addition needed

Combination of both is possible at 52°C (and 37°C; not tested)

AD is successful concept to treat organic residuals

THANK YOU


OWS nv

Dok Noord 5, 9000 Gent, Belgium

Email: [email protected]

Website: www.ows.be

Food

TRANSBIO. Aplicación final: de los residuos a la energía y el abono