Water, Год журнала: 2024, Номер 16(22), С. 3293 - 3293

Опубликована: Ноя. 16, 2024

Bioplastics are designed to degrade at the end of their lifecycle, but effective management end-of-life phase and integration into existing organic waste systems remain significant challenges. Some bioplastics decompose under anaerobic conditions, with digestion (AD) process being a potential solution for disposal. AD is promising technology valorising wastes, enabling biomethane production, reducing carbon footprints, promoting product circularity. This study focuses on evaluating continuous co-digestion mixed sludge from an urban wastewater treatment plant (WWTP). Polyhydroxybutyrate (PHB) was selected bioplastic, as various studies have reported its high rapid degradation mesophilic conditions. PHB’s biodegradability typical WWTP conditions (35 °C, 20-day retention time) assessed in batch tests results indicate that PHB ranged 68 75%, depending particle size. To further explore valorisation, feasibility tested laboratory scale using two digesters: conventional digester (CSTR) membrane bioreactor (AnMBR). The indicated complete PHB, which led higher biomethanisation percentages both digesters, rising 58% 70% AnMBR 44% 72% CSTR. notable increase observed CSTR attributed changes microbial populations improved biodegradability.

Язык: Английский