Production of nanocellulose from Israeli paper mill sludge by - - PowerPoint PPT Presentation

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University Production of nanocellulose from Israeli paper mill sludge by ozonation pretreatment followed by recyclable maleic acid . Peretz , E. Sterenzon, Y .

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University

Production of nanocellulose from Israeli paper mill sludge by

  • zonation pretreatment

followed by recyclable maleic acid hydrolysis

. Peretz, E. Sterenzon, Y

. Gerchman, V. Kumar Vadivel, T . Luxbacher , H. Mamane

7th international conference on sustainable solid waste management- Heraklion 2019

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  • 4.8 million tons of MSW are

produced annually.

  • The predominant types of

municipal wastes are of

  • rganic source with 34% of

food residues and 24% of paper and cardboard (by weight).

  • Total amount of paper and

cardboard wastes are about 1.15 million ton/year

  • Each year ~ 0.23 million

Israeli Ministry of Environmental Protection, 2014

Food wastes; 34,00%

Plastics; 18,00% Paper ; 16,00% Cardboard; 8,00% Others; 24,00%

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Recycled Paper Sludge What can we do with it??????

31,000 tons of RPS in Israel alone!

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As paper is made from wood material –

RPS contain cellulose, Lignin ?

Peretz et al. 2019

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Nanocellulose

Moon et al. 2010

Properties:

  • Low density (1.6 gr cm-3)
  • High light transmittance
  • High strength and stifgness
  • Surface (-OH) for chemical

modifjcations.

  • Biodegradable &

biocompatible.

  • High surface area.
  • Green disposal/ recycle at

end of life.

  • Thermal stability.

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Environmental friendly nanomaterials. Key component in many industrial applications.

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Voisin et al. 2017

Example: Water treatment

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Bharimalla et al. 2015

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Nanocellulose production is not so easy

* Based on Bian et al. 2017 Drying

Overnight ; 105 C

Grinding De-lignifjcation Sieving

1 hr ; 0.5 mm<..>4mm

Filtration Dilution

~ 1% total solids in DI

Centrifugation

15,000 X g ; 10 min .

Repeat centrifugation until turbidity Dialysis Acid hydrolysis

70 wt% maleic acid

Centrifugation

5,000 X g ; 10 min .

Pre-treatment Hydrolysis CNC separation

Sonication

20 min .

7th international conference on sustainable solid waste management- Heraklion 2019

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Pre-treatment (De-lignifjcation)

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Akhtar, 2014

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  • Very high reaction rate with

phenols than sugars/cellulose chains.

  • Short half-life (t1⁄2) in water –

20 min. (at 20 °C) – cleaning step is not necessary.

  • None to little inhibitors

formation.

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7th international conference on sustainable solid waste management- Heraklion 2019

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Soluble lignin (RPS) Total phenols (process water)

Peretz et al. 2019

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University

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XRD

* Typical cellulose-I structure- was not afgected

15 min. min. 120 min. 60 min.

* Slight increase of cI index from 70% to 77% Lignin (and other impurities) removal!

Peretz et al. 2019

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University

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Streaming potential

Ozone dose Streaming potential

Lignin and other impurities removal!

Peretz et al. 2019

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University

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Acid hydrolysis

Borjensson et al. 2019 Chen et al. 2016

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University

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Acid recovery

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University

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2,431 ± 571 nm in length 165 ± 37 nm in width

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Conclusions

  • Ozonation was examined as a pretreatment stage for

NC recovery from RPS.

  • Ozonation showed to result in efgective lignin

removal from the RPS.

  • RPS contain high amounts of crystalline cellulose,

making it a very good source for NC production.

  • NC yield remained low (~1 %wt), even after high
  • zone doses, suggesting

process optimization is required.

  • “Green-industry“ concept- no chemical traces, and

can applied at ambient conditions

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School of Mechanical engineering, Environmental engineering program , Tel Aviv University

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Thank you !

For more : Peretz et al. (2019), Carbohydrate Polymers, 216:343-351 https://doi.org/10.1016/j.carpol.2019.04.0 03