EU SUSTAINABLE ENERGY WEEK

18-22 JUNE 2012

Energy

Jan Suschka Date 18.06.2012

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Basing on the Strategic Research Agenda elaborated by the Polish Platform of Environmental Technologies and other official documents, the research and development priorities for the coming years can be summerised as follows:

Strategic water management – research and development

priorities in Poland

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New pro-ecological solutions

• Protection and rational use of water • Effective utilization of energy and energy

storage • Gain clean energy • More recycling (reuse) of resources

•Do more than less

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The nexus of water and energy is inextricable

WATER – RESOURCES - ENERGY

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New pro-ecological solutions

• Innovative solutions are necessary,

- have to be procured and introduced

• regarding;

– regulations

– governance

– handling and exploitation

– Technologies

Do more then less

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• A combined approach to water and energy efficiency in order to yield greater savings than

could be achieved focusing on either water or energy efficiency.

• In each individual case after profound assessment and identification of the energy saving potential a strategic water and energy management plan to address water and energy efficiency continuously is a must.

Water – energy nexus

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Why ?

• The wastewater treatment plants are the biggest municipal energy consumer by consuming nearly 20 % of the municipal energy demand.

• Thus, potential of energy saving is accordingly high and increasingly becomes an important matter of business und energy management.

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Energy saving by water and

wastewater reclamation and reuse

• Water reuse

• Rain water

• Leakage

• Inside water recirculation (membranes)

less water less waste water

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Sustainable and resource efficient WW treatment plants

• energy consumption from 0.9 to

10 kWh/m3

Up to 60 % of required energy is used for aeration in the biological WWT processes

A revised approach based on innovative initiatives (solutions) is needed

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Selected possible technologies for power consumption

reduction • Low temperature anaerobic wastewater

treatment process

• Maximization of organic matter retention before the biological step of treatment.

• Improvement or even discover new process for nitrogen removal

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Sulfate-dependent anaerobic ammonium oxidation

SO4-2 + 2NH4

+ → So + N2 + 4H2O

Bacillus benzoevorans

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Energy production from wastewater

• Conversion of organic matter in anaerobic processes to methane (biogas) and hydrogen.

• Introduction of thermal, chemical or mechanical pretreatment processes to enhance biogas production.

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Number of research articles published annually on pretreatment processes

(Vinay Kumar Tyagi)

2 4 2 8 4 3

9 6 6 6 13

19 18 22

33 40

30 39

77

98

0

20

40

60

80

100

120

nu

mb

er o

f arti

cle

s p

ub

lish

ed

year

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Waste activated sludge disintegration

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Production of biogas

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about 50% of the phosphorus from the raw sewage can be recovered as fertilizer for agriculture

Struvit – MAP Mg : NH4 : PO4 ∙ 6H2O

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Concentration of ammonia in the centrate before and after addition of superphosphate and magnesium oxide.

0

500

1000

1500

2000

2500

1 2 3 4

Sample No

Am

mo

nia

[m

g N

H4/l

] before

after

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Innovative technologies

are aiming at better effects with less resources involved and less energy used

water – energy nexus

Do more than less

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Atlok

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Title of the slide

Subtitle of the slide

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Title of the slide

Subtitle of the slide

Sed orci erat, dictum vel laoreet vestibulum, vehicula et nulla. Phasellus eu auctor odio.

Morbi euismod accumsan eros eget tincidunt:

• Integer leo mauris,

• venenatis ac aliquet sed,

• consequat sed lorem.

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0

100

200

300

400

500

600

Bio

gas

exp

ense

[cm

3 /g

v.s

.s.]

Samples

act

iva

ted

s

lud

ge

ativ

ated

slu

dge

+ 2

0% d

isin

tegr

ated

foa

m

ativ

ated

slu

dge

+ 4

0% d

isin

tegr

ated

foa

m

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23

4,986,07

9,73

11,48

0

1

2

3

4

5

6

7

8

9

10

11

12

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Biog

as [

ℓ∙d-1

∙ℓ-1

]

Time of fermentation [d]raw sludge

90% raw sludge + 10% activated sludge after disintegration

80% raw sludge + 20% activated sludge after disintegration

70% raw sludge + 30% activated sludge after disintegration