Werker Alan, Bengtsson Simon, Korving Leon, Hjort Markus, Anterrieu Simon, Alexandersson Tomas, Johansson Peter, Karlsson Anton, Karabegovic Lamija, Magnusson Per, Morgan-Sagastume Fernando, Sijstermans Luc, Tietema Martin, Visser Cindy, Wypkema Etteke, van der Kooij Yede, Deeke Alexandra, Uijterlinde Cora
Promiko, Lomma, Sweden; Wetsus, Leeuwarden, The Netherlands E-mail:
Promiko, Lomma, Sweden.
Water Sci Technol. 2018 Dec;78(11):2256-2269. doi: 10.2166/wst.2018.502.
Production of polyhydroxyalkanoate (PHA) biopolymers by mixed microbial cultures concurrent to wastewater treatment is a valorization route for residual organic material. This development has been at pilot scale since 2011 using industrial and municipal organic residuals. Previous experience was the basis for a PHA production demonstration project: PHARIO. PHARIO was centred on processing surplus activated sludge biomass from the Bath full-scale municipal wastewater treatment plant in the Netherlands to produce PHA. Full-scale surplus activated sludge was fed to a pilot facility to produce PHA rich biomass using fermented volatile fatty acid (VFA) rich liquors from industry or primary sludge sources. A PHA rich biomass with on average 0.41 gPHA/gVSS was obtained with reproducible thermal properties and high thermal stability. A routine kilogram scale production was established over 10 months and the polymer material properties and market potential were evaluated. Surplus full-scale activated sludge, over four seasons of operations, was a reliable raw material to consistently and predictably produce commercial quality grades of PHA. Polymer type and properties were systematic functions of the mean co-polymer content. The mean co-polymer content was predictably determined by the fermented feedstock composition. PHARIO polymers were estimated to have a significantly lower environmental impact compared to currently available (bio)plastics.
通过混合微生物培养物在废水处理的同时生产聚羟基脂肪酸酯（PHA）生物聚合物是一种残余有机物质的增值途径。自2011年以来，这一技术已在中试规模上利用工业和城市有机残余物进行开发。先前的经验是PHA生产示范项目PHARIO的基础。PHARIO的核心是处理荷兰巴斯市全规模城市污水处理厂的剩余活性污泥生物质以生产PHA。将全规模剩余活性污泥输送到中试设施，利用来自工业或初沉污泥源的富含发酵挥发性脂肪酸（VFA）的液体来生产富含PHA的生物质。获得了平均每克挥发性悬浮固体含0.41克PHA的富含PHA的生物质，其具有可重复的热性能和高热稳定性。在10个月内建立了常规千克规模生产，并对聚合物材料性能和市场潜力进行了评估。在四个季节的运营中，全规模剩余活性污泥是持续、可预测地生产商业质量等级PHA的可靠原材料。聚合物类型和性能是平均共聚物含量的系统函数。平均共聚物含量可通过发酵原料组成预测确定。据估计，与目前可用的（生物）塑料相比，PHARIO聚合物对环境的影响显著更低。
