PMID- 31472439 OWN - NLM STAT- MEDLINE DCOM- 20190917 LR - 20190917 IS - 1879-2456 (Electronic) IS - 0956-053X (Linking) VI - 99 DP - 2019 Nov TI - A circular economy use of recovered sludge cellulose in wood plastic composite production: Recycling and eco-efficiency assessment. PG - 42-48 LID - S0956-053X(19)30556-2 [pii] LID - 10.1016/j.wasman.2019.08.037 [doi] AB - This paper presents a novel development of sludge cellulose plastic composite (SPC) in line with the circular economy concept by using recovered sludge cellulose from wastewater treatment plant (WWTP). Bearing the aim of replacing the wood in wood plastic composite (WPC) with sludge cellulose, WPC was developed in parallel for determining the substitution potentials. In order to maximise the integration of properties, maleic anhydride (MA) and vinyltrimethoxysilane (VTMS) coupling agents were employed to refine the interfacial bonding of both SPC and WPC. In line with the main aim of circular economy - to decouple the economic value from the environmental impact, eco-efficiency analysis was performed for the developed process. The results showed that the tensile and flexural strength of the composites were substantially enhanced after both treatments, while MA appeared to be more efficient than VTMS in the refinery of interfacial bonding. Scanning electron microscope (SEM) analysis confirmed the improvement of interface by identifying well embedded and firmly bonded wood flour or sludge cellulose in the matrix. WPC was marginally more thermally stable than SPC, while SPC suggested comparable flexural properties. Eco-efficiency assessment results showed that the SPC had better environmental and economic performance than the WPC. The latter turns sludge cellulose as a promising sustainable alternative to wood or natural fibres in the production of WPC. CI - Copyright (c) 2019 Elsevier Ltd. All rights reserved. FAU - Zhou, Yonghui AU - Zhou Y AD - Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, UB8 3PH, United Kingdom. Electronic address: yonghui.zhou@brunel.ac.uk. FAU - Stanchev, Peyo AU - Stanchev P AD - Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, UB8 3PH, United Kingdom. Electronic address: peyo.stanchev@brunel.ac.uk. FAU - Katsou, Evina AU - Katsou E AD - Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, UB8 3PH, United Kingdom. Electronic address: evina.katsou@brunel.ac.uk. FAU - Awad, Said AU - Awad S AD - Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, UB8 3PH, United Kingdom. Electronic address: said.awad@brunel.ac.uk. FAU - Fan, Mizi AU - Fan M AD - Department of Civil and Environmental Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, UB8 3PH, United Kingdom. Electronic address: mizi.fan@brunel.ac.uk. LA - eng PT - Journal Article DEP - 20190828 PL - United States TA - Waste Manag JT - Waste management (New York, N.Y.) JID - 9884362 RN - 0 (Plastics) RN - 0 (Sewage) RN - 9004-34-6 (Cellulose) SB - IM MH - Cellulose MH - *Plastics MH - Recycling MH - Sewage MH - *Wood OTO - NOTNLM OT - Circular economy OT - Eco-efficiency OT - Environmental impact OT - Properties OT - Sludge cellulose OT - Wood plastic composite EDAT- 2019/09/01 06:00 MHDA- 2019/09/19 06:00 CRDT- 2019/09/01 06:00 PHST- 2019/03/27 00:00 [received] PHST- 2019/07/10 00:00 [revised] PHST- 2019/08/23 00:00 [accepted] PHST- 2019/09/01 06:00 [pubmed] PHST- 2019/09/19 06:00 [medline] PHST- 2019/09/01 06:00 [entrez] AID - S0956-053X(19)30556-2 [pii] AID - 10.1016/j.wasman.2019.08.037 [doi] PST - ppublish SO - Waste Manag. 2019 Nov;99:42-48. doi: 10.1016/j.wasman.2019.08.037. Epub 2019 Aug 28.