Dr. Malamis Dimitris

National Technical University of Athens School of Chemical Engineering Unit of Environmental Science and Technology

“Water Resources Management: Needs and Prospects”

Jordan, Amman, 22/04/2013

INTERWASTE Project INTERWASTE is co-funded by EU LIFE+ ENVIRONMENT

INTERWASTE Partners

National Technical University of Athens (Greece)

Cyprus University of Technology

University of Nicosia (Cyprus)

Proplan Ltd (Cyprus)

Department of Environment Ministry of Agriculture, natural

Recourses and Environment .

Aim of present work Development of an integrated system for sustainable

treatment of Biodegradable Organic Waste and Municipal Wastewater with zero discharge

Production of high quality, added value products

Electricity and heat from renewable sources (organic waste)

High quality effluent that can be reused (i.e. irrigation)

High quality soil conditioner-compost

This can be achieved through the integration of aerobic and anaerobic processes by employing:

Membrane BioReactor-Anaerobic Digester

MBR - AD

Potential users of the integrated

MBR-AD system Generally places where production of waste and

demand of the obtained products from waste treatment co-exist:

Remote de-centralized regions

Small communities

Residential areas (i.e. blocks of flats)

Hotels

MBR

AD

BIOGAS

Digestate

Flow Sheet diagram MBR - AD

The integrated system

The MBR – AD Unit

Operating parameters MBR

1,5 m3/d municipal wastewater

sludge outlet– 100 l/d => to AD

AD

Daily preparation of substrate. Formation of a mixture of 150L with 10% TS consisting of food waste and sludge from the MBR

150 L of digestate are separated into liquid and solid phase

Solid phase => solar drier

Liquid phase => recirculated to the MBR

MBR

Flow Sheet diagram MBR - AD

MBR – BUFFER TANK

Stainless steal vessel 8,5 m3

MBR

Flow Sheet diagram MBR - AD

MBR

Feedstock Municipal

Wastewater from Buffer Tank

(1,5 m3/d)

Membrane BioReactor

(MBR) system for

wastewater treatment

Effluent

(water)

Sludge

Sludge fed to the Anaerobic

Digestion System

AD

Flow Sheet diagram MBR - AD

Homogenization Unit – AD Substrate preparation

Homogenization Unit: • Sludge from the MBR

• Food waste

• Target 10±2% TS

AD

Flow Sheet diagram MBR - AD

Anaerobic Digester

Substrate from the

Homogenization

Unit

Digestate

Biogas

Total volume 8,5 m3

Operating volume

4,5 m3

Substrate feed

150 L/d with 10 % TS

Mesophilic

Temperature (≈35oC)

SRT = 20-25days

AD – Biogas System

Biogas

Storage

(Balloon 3m3)

Biogas Meter Scrubber for biogas

cleaning (VOC, Η3)

Packed bed

Scrubber

(H2S)

Biogas

Composition

Analysis

CHP unit

Biogas Cleaning System

Scrubbers for biogas cleaning

CHP unit for

energy

production

Digestate

Flow Sheet diagram MBR - AD

Bag Filter – Treatment of Digestate

70%

75%

80%

85%

90%

95%

100%

0 100 200 300 400

% C

OD

re

mo

va

l

Days of operation

Start up

1 ec-MBR

2 ec-MBR

3 ec-MBR

4 ec-MBR

5 ec-MBR

ΒR performance % COD reduction

70%

75%

80%

85%

90%

95%

100%

0 100 200 300 400

% T

N r

em

ov

al

Days of operation

Start up

1 ec-MBR

2 ec-MBR

3 ec-MBR

4 ec-MBR

5 ec-MBR

ΒR Performance TN reduction

70%

75%

80%

85%

90%

95%

100%

0 100 200 300 400

% N

H4

re

mo

va

l

Days of operation

Start up

1 ec-MBR

2 ec-MBR

3 ec-MBR

4 ec-MBR

5 ec-MBR

ΒR Performance - NH4+ reduction

Biogas Composition CH4 = 59%, CO2= 40 %

0

2

4

6

8

10

12

14

0 100 200 300 400

Bio

ga

s P

rod

uct

ion

(m

3/d

)

Days of operation

1 ec-AD

2 ec-AD

3 ec-AD

4 ec-AD

AD Performance – Biogas Production

Biogas - Energy Balance

Electricity

Biogas

100%

Heat

33%

3.5 %

22%

31.5%

55%

35%

losses

10%

MBR-AD potential applications Treating Biowaste & Municipal wastewater of a

community with population of 1,000 persons in Cyprus

covers the electricity needs of around 55 inhabitants or 19

households

Produces 150 m3/d of water that can be used for irrigation

Treating Biowaste & Municipal wastewater of a 5 star

Hotel in Cyprus

covers 3.4% of the needs for electricity and

covers 3.6% of the heating needs

Produces 250 m3/d water that can be used for irrigation

THANK YOU FOR YOUR ATTENTION

Dr. Dimitris Malamis

National Technical University of Athens School of Chemical Engineering Unit of Environmental Science and Technology dmalamis@chemeneng.ntua.gr www.uest.gr Tel: 2107723108

Fax: 2107723285