HERAKLION 2019 International Conference on Sustainable Solid Waste - - PowerPoint PPT Presentation

▶
heraklion 2019
SMART_READER_LITE
LIVE PREVIEW

HERAKLION 2019 International Conference on Sustainable Solid Waste - - PowerPoint PPT Presentation

Oct 31, 2023 14 likes •218 views

HERAKLION 2019 International Conference on Sustainable Solid Waste Management 26 29 June 2019 Application of semi-continuous pilot-scale AD tests to assess biochemical methane potential and hydrolysis rate constant of raw and pre-treated

slide-1
SLIDE 1

Application of semi-continuous pilot-scale AD tests to assess biochemical methane potential and hydrolysis rate constant of raw and pre-treated sludge

  • G. Campo1, A. Cerutti1, M.C. Zanetti1, G. Scibilia2, E. Lorenzi2, B. Ruffjno1

1Department Environment, Land and Infrastructure Engineering, Politecnico di T

  • rino, T
  • rino, I-10129, Italy

2Research Center, Società Metropolitana Acque T

  • rino S.p.A., Viale Maestri del Lavoro, 4 – 10127 T
  • rino, Italy

HERAKLION 2019

International Conference on Sustainable Solid Waste Management 26 – 29 June 2019 http://www.wearwe.polito.it

slide-2
SLIDE 2

Municipal and industrial wastewater Capacity: 2,000,000 E.I. Average fmow rate: 7 m3/s

Castiglione T

  • rinese

WWTP

slide-3
SLIDE 3

Pre-treatments

“Review of feedstock pretreatment strategies for improved anaerobic digestion: From lab-scale research to full-scale application”

Polito-Smat

Carrere H., Antonopoulou G., Afges R., Passos, Battimelli A., Lyberatos G,Ferrer I. (2016) Review of feedstock pretreatment strategies for improved anaerobic digestion: From lab-scale research to full-scale application Bioresour. T echnol.Vol. 199, 386–397

Low temperature thermo – alkali pre-treatment

4kg NaOH /100kg TS, 90 °C, 1.5h

Low thermal, alkali and low temperature thermo-alkali pretreatments

slide-4
SLIDE 4

CST Reactor

5 10 15 20 25 30 35 40 0,1 0,2 0,3 0,4 0,5

Bo

t B(t)

5 10 15 20 25 30 35 40 0,1 0,2 0,3 0,4 0,5

khyd

t B(t)

Batch

Reactor

slide-5
SLIDE 5

VSb VSnb NVS VSb VSnb

? ?

Biogas NVS

CSTR Digester

?

slide-6
SLIDE 6

VSb VSnb NVS VSb VSnb Biogas NVS

CSTR Digester

slide-7
SLIDE 7

Pilot Anaerobic digestion tests

Primary Sludge Secondary Sludge

Mesophilic Anaerobic Digestion (38°C)

slide-8
SLIDE 8

12 24 36 48 60 72 84 96 108 120 132 144 156

0,00 0,00 0,01 0,01 0,02 0,02 0,03 0,03 0,04 0,04

Experimental

Days Nm3

slide-9
SLIDE 9

12 24 36 48 60 72 84 96 108 120 132 144 156 0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 Experimental

Days Nm3

Secondary Sludge

Calibration 1/3

12 24 36 48 60 72 84 96 108 120 132 144 156

  • 0,005

0,000 0,005 0,010 0,015 0,020 0,025 0,030 0,035 0,040

Days Nm3/d

Cumulative methane production Daily methane production

slide-10
SLIDE 10

12 24 36 48 60 72 84 96 108 120 132 144 156 0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 Model Experimental

Days Nm3

Secondary Sludge = 0.147 [Nm3/kgVS] ]

Calibration 1/3

12 24 36 48 60 72 84 96 108 120 132 144 156

  • 0,005

0,000 0,005 0,010 0,015 0,020 0,025 0,030 0,035 0,040

Days Nm3/d

Cumulative methane production Daily methane production

slide-11
SLIDE 11

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 Model Experimental

Days Nm3

= 0.250 Nm3/kgSV

Pre-treatment: 90 °C - 1,5 h – 4g NaOH/100gST

Calibration 2/3

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 0,000 0,010 0,020 0,030 0,040 0,050 0,060 0,070 0,080 0,090 0,100

Days Nm3

Secondary Sludge

Cumulative methane production Daily methane production

slide-12
SLIDE 12

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 Model Experimental

Days Nm3

= 0.250 Nm3/kgSV + 71% + 447%

Pre-treatment: 90 °C - 1,5 h – 4g NaOH/100gST

Calibration 2/3

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 0,000 0,010 0,020 0,030 0,040 0,050 0,060 0,070 0,080 0,090 0,100

Days Nm3

Secondary Sludge

Cumulative methane production Daily methane production

slide-13
SLIDE 13

12 24 36 48 60 72 84 96 108 120 132 144 156 0,00 0,05 0,10 0,15 0,20 0,25 0,30 Model Experimental

Days Nm3

= 0.300 Nm3/kgSV

12 24 36 48 60 72 84 96 108 120 132 144 156

  • 0,0005

0,0000 0,0005 0,0010 0,0015 0,0020 0,0025 0,0030 0,0035 0,0040

Days Nm3

Primary sludge

Calibration 3/3

Cumulative methane production Daily methane production

slide-14
SLIDE 14

Secondary sludge Primary sludge

12 24 36 48 60 72 84 96 0,00 0,50 1,00 1,50 2,00 2,50 3,00 3,50 4,00 4,50 Sperimentale

Days Nm3

12 24 36 48 60 72 84 96 0,0000 0,0100 0,0200 0,0300 0,0400 0,0500 0,0600 0,0700

Daily methane production

Days Nm3

Validatio n

Cumulative methane production

90 °C - 1,5 h – 4g NaOH/100gST

slide-15
SLIDE 15

Secondary sludge Primary sludge = 0.250 Nm3/kgVS = 0.300 Nm3/kgVS

12 24 36 48 60 72 84 96 0,00 0,50 1,00 1,50 2,00 2,50 3,00 3,50 4,00 4,50 Modello Sperimentale

Days Nm3

12 24 36 48 60 72 84 96 0,0000 0,0100 0,0200 0,0300 0,0400 0,0500 0,0600 0,0700

Daily methane production

Days Nm3

Validatio n

Error 1.1%

Cumulative methane production

slide-16
SLIDE 16

WAS A.D. in WWTP Castiglione Torinese Present conditions B20d = 0.09

Nm3/kg VS

WAS Mesophilic AD 38 °C

k = 0.09 1/d BO = 0.147 Nm3/kg

VS

slide-17
SLIDE 17

WAS A.D. in WWTP Castiglione Torinese Present conditions B20d = 0.09

Nm3/kg VS

+ 144 %

Scenario 1 B20d = 0.226

Nm3/kg VS

WAS Mesophilic AD 38 °C WAS Pretreatment + AD 38°C

NaOH 4g/100g TS 90 °C, 1,5h

k = 0.09 1/d BO = 0.147 Nm3/kg

VS

k = 0.46 1/d BO = 0.250 Nm3/kg VS

slide-18
SLIDE 18

WAS A.D. in WWTP Castiglione Torinese Present conditions B20d = 0.09

Nm3/kg VS

+ 108 % + 144 %

Scenario 2 Scenario 1 B20d = 0,193

Nm3/kg VS

B20d = 0.226

Nm3/kg VS

WAS Mesophilic AD 38 °C WAS Thermophilic AD 55 °C WAS Pre-treatment + AD 38°C

k = 0.09 1/d BO = 0.147 Nm3/kg

VS

k = 0,380 1/d BO = 0,218 Nm3/kg

VS

Y e s t e r d a y

NaOH 4g/100g TS 90 °C, 1,5h k = 0.46 1/d BO = 0.250 Nm3/kg VS

slide-19
SLIDE 19

Conclusions:

  • The proposed first order kinetic model can be used as a tool in order

to obtain a good estimation of the couple of parameters Bo and k .

  • The thermo-alkali treatment improved the biomethane potential by

70.1 %;

  • The raw secondary sludge is slowly biodegradable (k =0.09 d-1) but

the thermo-alkali treatment increased the hydrolysis constant by 447%;

slide-20
SLIDE 20

Application of semi-continuous pilot-scale AD tests to assess biochemical methane potential and hydrolysis rate constant of raw and pre- treated sludge

Thank you for your attention!

  • G. Campo1, A.Cerutti1, M.C. Zanetti1, G. Scibilia2, E. Lorenzi2, B. Ruffjno1

giuseppe.campo@polito.it http://www.wearwe.polito.it

1Department Environment, Land and Infrastructure Engineering,

Politecnico di T

  • rino,

10129, T

  • rino, Italy

2Research Center, Società Metropolitana Acque T

  • rino S.p.A., Viale Maestri

del Lavoro, 4 – 10127 T

  • rino, Italy

HERAKLION 2019

International Conference on Sustainable Solid Waste Management 26 – 29 June 2019