Department of Water Supply, Sanitation and Environmental Engineering, IHE Delft Institute for Water Education, Westvest 7, 2611AX Delft, The Netherlands.
Department of Water Supply, Sanitation and Environmental Engineering, IHE Delft Institute for Water Education, Westvest 7, 2611AX Delft, The Netherlands.
Bioresour Technol. 2021 Jul;331:124985. doi: 10.1016/j.biortech.2021.124985. Epub 2021 Mar 15.
The problem of waste generation in the form of wastewater and solid wastes has caused an urgent, yet persisting, global issue that calls for the development of sustainable treatment and resource recovery technologies. The production of value-added polyhydroxyalkanoates (PHAs) from industrial waste streams has attracted the attention of researchers and process industries because they could replace traditional plastics. PHAs are biopolymers with high degradability, with a variety of applications in the manufacturing sector (e.g. medical equipment, packaging). The aim of this review is to describe the techniques and industrial waste streams that are applied for PHA production. The different enrichment and accumulation techniques that employ mixed microbial communities and carbon recovery from industrial waste streams and various downstream processes were reviewed. PHA yields between 7.6 and 76 wt% were reported for pilot-scale PHA production; while, at the laboratory-scale, yields from PHA accumulation range between 8.6 and 56 wt%. The recent advances in the application of waste streams for PHA production could result in more widely spread PHA production at the industrial scale via its integration into biorefineries for co-generation of PHAs with other added-value products like biohydrogen and biogas.
以废水和固体废物形式产生的废物问题已经引发了一个紧迫而持久的全球性问题，需要开发可持续的处理和资源回收技术。从工业废物流中生产增值的聚羟基烷酸酯 (PHA) 引起了研究人员和加工业的关注，因为它们可以替代传统塑料。PHA 是一种具有高降解性的生物聚合物，在制造业（如医疗设备、包装）中有多种应用。本综述的目的是描述用于 PHA 生产的技术和工业废物流。综述了不同的富集和积累技术，这些技术利用混合微生物群落和从工业废物流中回收碳，以及各种下游工艺。在中试规模的 PHA 生产中，PHA 的产率为 7.6 至 76 wt%；而在实验室规模下，PHA 积累的产率范围为 8.6 至 56 wt%。通过将其整合到生物精炼厂中，与其他附加值产品（如生物氢和沼气）共同生产 PHA，废物在 PHA 生产中的应用的最新进展可能会导致更广泛地在工业规模上生产 PHA。
