AnoxKaldnes, Veolia Water Technologies, Klosterängsvägen 11A, 226 47 Lund, Sweden.
AnoxKaldnes, Veolia Water Technologies, Klosterängsvägen 11A, 226 47 Lund, Sweden.
Bioresour Technol. 2015 Apr;181:78-89. doi: 10.1016/j.biortech.2015.01.046. Epub 2015 Jan 20.
A pilot-scale process was operated over 22 months at the Brussels North Wastewater Treatment Plant (WWTP) in order to evaluate polyhydroxyalkanoate (PHA) production integration with services of municipal wastewater and sludge management. Activated sludge was produced with PHA accumulation potential (PAP) by applying feast-famine selection while treating the readily biodegradable COD from influent wastewater (average removals of 70% COD, 60% CODsol, 24% nitrogen, and 46% phosphorus). The biomass PAP was evaluated to be in excess of 0.4gPHA/gVSS. Batch fermentation of full-scale WWTP sludge at selected temperatures (35, 42 and 55 °C) produced centrate (6-9.4 gCODVFA/L) of consistent VFA composition, with optimal fermentation performance at 42 °C. Centrate was used to accumulate PHA up to 0.39 gPHA/gVSS. The centrate nutrients are a challenge to the accumulation process but producing a biomass with 0.5 gPHA/gVSS is considered to be realistically achievable within the typically available carbon flows at municipal waste management facilities.
在布鲁塞尔北污水处理厂（WWTP）进行了为期 22 个月的中试规模试验，以评估聚羟基烷酸酯（PHA）生产与城市废水和污泥管理服务的集成。通过在处理易生物降解 COD 的同时施加丰度-饥饿选择，使活性污泥具有 PHA 积累潜力（PAP），废水中的 COD（平均去除率为 70%COD、60%CODsol、24%氮和 46%磷）。评估生物量的 PAP 超过 0.4gPHA/gVSS。在选定的温度（35、42 和 55°C）下对全规模 WWTP 污泥进行分批发酵，产生了恒组成的浓缩物（6-9.4gCODVFA/L），在 42°C 下发酵性能最佳。浓缩物可用于积累高达 0.39gPHA/gVSS 的 PHA。浓缩物中的养分对积累过程是一个挑战，但在市政废物管理设施中通常可获得的碳流范围内，生产 0.5gPHA/gVSS 的生物质被认为是切实可行的。
