Opportunities in the microbial valorization of sugar industrial organic waste to biodegradable smart food packaging materials
Opportunities in the microbial valorization of sugar industrial organic waste to biodegradable smart food packaging materials
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DOI：
10.1016/j.ijfoodmicro.2022.109785
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发表时间：
2022-09-16
影响因子：
5.4
通讯作者：
Jayakody, Lahiru N.
中科院分区：
文献类型：
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作者：
Jayasekara, Sandhya;Dissanayake, Lakshika;Jayakody, Lahiru N.
许多石油衍生塑料，包括食品包装材料，是不可生物降解的，专为一次性应用而设计。每年约175吨。由于管理不善和缺乏技术和经济上可行的塑料废物回收技术，大量塑料进入陆地和海洋生态系统。可再生、可生物降解的聚合物基食品包装材料可以减少这种环境污染。从甘蔗或甜菜生产糖产生含有可发酵底物的有机废物流，包括糖、酸和芳香剂。可以利用微生物代谢将这些分子汇集到平台化学品或生物聚合物中，以产生具有嵌入生物聚合物基质中的活性或传感分子的可生物降解的食品包装材料。智能包装可以实时监控食品质量，确保健康安全，并提供经济和环境效益。活性包装材料具有抗菌、抗氧化、阻光或阻气等功能特性。本文概述了潜在的可生物降解的智能/活性聚合物包装的食品应用价值的制糖工业产生的有机废物。我们强调了潜在的微生物途径和代谢工程策略，以有效地将废碳生物漏斗到目标平台化学品中，如乳酸，琥珀酸，粘康酸和生物聚合物，包括聚羟基链烷酸酯和细菌纤维素。所获得的平台化学品可用于生产可生物降解的聚合物，如聚（己二酸丁二醇酯-对苯二甲酸丁二醇酯）（PBAT），其可替代现有的聚乙烯和聚丙烯食品包装材料。当添加纳米材料时，这些聚合物可以是活性/智能的。相对于以石油为基础的生产，该工艺可以显著降低温室气体排放和通过制糖工业废碳生产食品包装材料所用的能源。所提出的绿色路线能够将糖加工有机废物转化为可生物降解的材料，并实现循环经济。
Many petroleum-derived plastics, including food packaging materials are non-biodegradable and designed for single-use applications. Annually, around 175 Mt. of plastic enters the land and ocean ecosystems due to mismanagement and lack of techno economically feasible plastic waste recycling technologies. Renewable sourced, biodegradable polymer-based food packaging materials can reduce this environmental pollution. Sugar production from sugarcane or sugar beet generates organic waste streams that contain fermentable substrates, including sugars, acids, and aromatics. Microbial metabolism can be leveraged to funnel those molecules to platform chemicals or biopolymers to generate biodegradable food packaging materials that have active or sensing molecules embedded in biopolymer matrices. The smart package can real-time monitor food quality, assure health safety, and provide economic and environmental benefits. Active packaging materials display functional properties such as antimicrobial, antioxidant, and light or gas barrier. This article provides an overview of potential biodegradable smart/active polymer packages for food applications by valorizing sugar industry-generated organic waste. We highlight the potential microbial pathways and metabolic engineering strategies to biofunnel the waste carbon efficiently into the targeted platform chemicals such as lactic, succinate, muconate, and biopolymers, including polyhydroxyalkanoates, and bacterial cellulose. The obtained platform chemicals can be used to produce biodegradable polymers such as poly (butylene adipate-co-terephthalate) (PBAT) that could replace incumbent polyethylene and polypropylene food packaging materials. When nanomaterials are added, these polymers can be active/smart. The process can remarkably lower the greenhouse gas emission and energy used to produce food-packaging material via sugar industrial waste carbon relative to the petroleum-based production. The proposed green routes enable the valorization of sugar processing organic waste into biodegradable materials and enable the circular economy.