Recent advances on food waste pretreatment technology via microalgae for source of polyhydroxyalkanoates

Jun Wei Roy Chong; Guo Yong Yew; Kuan Shiong Khoo; Shih-Hsin Ho; Pau Loke Show

doi:10.1016/j.jenvman.2021.112782

Recent advances on food waste pretreatment technology via microalgae for source of polyhydroxyalkanoates

J Environ Manage. 2021 Sep 1:293:112782. doi: 10.1016/j.jenvman.2021.112782. Epub 2021 May 27.

Authors

Jun Wei Roy Chong¹, Guo Yong Yew², Kuan Shiong Khoo², Shih-Hsin Ho³, Pau Loke Show⁴

Affiliations

¹ State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, P.R. China; Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia.
² Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia.
³ State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, P.R. China.
⁴ Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia. Electronic address: PauLoke.Show@nottingham.edu.my.

PMID: 34052610
DOI: 10.1016/j.jenvman.2021.112782

Abstract

Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible polyester which are biosynthesized from the intracellular cells of microalgae through the cultivation of organic food waste medium. Before cultivation process, food waste must undergo several pre-treatment techniques such as chemical, biological, physical or mechanical in order to solubilize complex food waste matter into simpler micro- and macronutrients in which allow bio-valorisation of microalgae and food waste compound during the cultivation process. This work reviews four microalgae genera namely Chlamydomonas, Chlorella, Spirulina, and Botryococcus, are selected as suitable species due to rapid growth rate, minimal nutrient requirement, greater adaptability and flexibility prior to lower the overall production cost and maximized the production of PHAs. This study also focuses on the different mode of cultivation for the accumulation of PHAs followed by cell wall destabilization, extraction, and purification. Nonetheless, this review provides future insights into enhancing the productivity of bioplastic derived from microalgae towards low-cost, large-scale, and higher productivity of PHAs.

Keywords: Bio-plastic; Food waste; Microalgae; Polyhydroxyalkanoates; Pre-treatment.

Publication types

Review

MeSH terms

Biomass
Chlorella*
Food
Microalgae*
Polyhydroxyalkanoates*
Refuse Disposal*
Technology
Wastewater

Substances

Polyhydroxyalkanoates
Waste Water