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

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 . Gerchman, V. Kumar Vadivel, T . Luxbacher , H. Mamane hydrolysis 7 th international conference on sustainable solid waste management- Heraklion 2019 1

• 4.8 million tons of MSW are produced annually. Others; 24,00% • The predominant types of municipal wastes are of Food wastes; 34,00% organic source with 34% of Cardboard; 8,00% food residues and 24% of paper and cardboard (by Plastics; weight). Paper ; 16,00% 18,00% • Total amount of paper and Israeli Ministry of Environmental Protection, 2014 cardboard wastes are about 1.15 million ton/year 7 th international conference on sustainable solid waste management- Heraklion 2019 • Each year ~ 0.23 million 2

Recycled Paper Sludge 31,000 tons of RPS in Israel alone! What can we do with it?????? 3 7 th international conference on sustainable solid waste management- Heraklion 2019

As paper is made from wood material – RPS contain cellulose, Lignin ? Peretz et al. 2019 7 th international conference on sustainable solid waste management- Heraklion 2019 4

Nanocellulose 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 Moon et al. 2010 end of life. Environmental friendly nanomaterials. • Thermal stability. Key component in many industrial applications. 7 th international conference on sustainable solid waste management- Heraklion 2019 5

Example: Water treatment Voisin et al. 2017 Bharimalla et al. 2015 7 th international conference on sustainable solid waste management- Heraklion 2019 6 6

Nanocellulose production is not so easy Based on Bian et al. 2017 * Hydrolysis Pre-treatment CNC separation Acid hydrolysis De-lignifjcation Repeat centrifugation 70 wt% maleic acid until turbidity Filtration Dialysis Drying Overnight ; 105 C Dilution Centrifugation total solids in DI 1% ~ X g ; 10 min . 5,000 Grinding Sonication . min 20 Sieving hr ; 0.5 mm<..>4mm 1 Centrifugation X g ; 10 min . 15,000 7 th international conference on sustainable solid waste management- Heraklion 2019 7

Pre-treatment (De-lignifjcation) Akhtar, 2014 7 th international conference on sustainable solid waste management- Heraklion 2019 8 8

• 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 7 th international conference on sustainable solid waste management- Heraklion 2019 9 9 formation.

Soluble lignin (RPS) Total phenols (process water) Peretz et al. 2019 7 th international conference on sustainable solid waste management- Heraklion 2019 10

School of Mechanical XRD engineering, Environmental engineering program , 0 Tel Aviv University min. 120 min. 60 min. 15 min. Peretz et al. 2019 * Typical cellulose-I structure- was not afgected * Slight increase of cI index from 70% to 77% Lignin (and other impurities) removal! 7 th international conference on sustainable solid waste management- Heraklion 2019 11

School of Mechanical Streaming engineering, Environmental potential , engineering program Tel Aviv University Peretz et al. 2019 Ozone Streaming dose potential Lignin and other impurities removal! 7 th international conference on sustainable solid waste management- Heraklion 2019 12

School of Mechanical Acid hydrolysis engineering, Environmental engineering program , Tel Aviv University Borjensson et al. 2019 Chen et al. 2016 7 th international conference on sustainable solid waste management- Heraklion 2019 13

Acid recovery School of Mechanical engineering, Environmental engineering program , Tel Aviv University 7 th international conference on sustainable solid waste management- Heraklion 2019 14

School of Mechanical engineering, Environmental engineering program , Tel Aviv University nm in length 571 ± 2,431 nm in width 37 ± 165 7 th international conference on sustainable solid waste management- Heraklion 2019 15

Conclusions • RPS contain high amounts of crystalline cellulose, making it a very good source for NC production . • Ozonation was examined as a pretreatment stage for NC recovery from RPS. • Ozonation showed to result in efgective lignin removal from the RPS. • NC yield remained low (~1 %wt), even after high ozone doses, suggesting process optimization is required. • “Green-industry“ concept- no chemical traces, and can applied at ambient conditions 7 th international conference on sustainable solid waste management- Heraklion 2019 16 16

School of Mechanical engineering, Environmental engineering program , Tel Aviv University Thank you ! For more : Peretz et al. (2019), Carbohydrate Polymers , 216:343-351 https://doi.org/10.1016/j.carpol.2019.04.0 7 th international conference on sustainable solid waste management- Heraklion 2019 17 03