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引用次数: 0
摘要
利用酿酒酵母在实验室规模上进行磷(P)回收的最新进展被用于扩大到中试规模的工艺(BioP-Rec 模块),并应用于大规模污水处理厂(WWTP)。根据两个阈值为 Markranstädt 污水处理厂建立了 P 平衡:(1) P 回收的经济可行性阈值为 0.05 kg/m3 游离 P,(2) 德国污水污泥条例 (GSSO) 阈值,该条例要求在未来几年内,所有生物固体干物质 (DM) 中 P 含量达到或超过 20 gP/kgDM 的污水处理厂都必须进行强制性 P 回收。根据规定的阈值,回流污泥和过量污泥被认为是最可行的回收 P 的污水处理厂工艺流。在一个 1 立方米的 BioP-Rec 模块中,建立了一个三阶段工艺。第 1 阶段产生的回流污泥中富含 P 的水相(游离 P 含量为 0.051 kg/m3),在第 2 阶段的 3 小时内,77.56% 的 P 被贫 P 啤酒酵母吸收。在第 3 阶段,酵母在 1 小时内浓缩,产生酵母污泥作为肥料产品。我们展示了一种生产富含 P 的生物基肥料的新型中试规模工艺。
Biological recovery of phosphorus (BioP-Rec) from wastewater streams using brewer's yeast on pilot-scale
Most recent advances for phosphorus (P) recovery using brewery yeast on laboratory scale were used to scale up to a pilot-scale process (BioP-Rec module) and applied in a full-scale wastewater treatment plant (WWTP). A P balance was established for WWTP Markranstädt according to two thresholds: (1) the economic feasibility threshold for P recovery of 0.05 kg/m3 of free P, and (2) the German Sewage Sludge Ordinance (GSSO) threshold, which demands that all WWTPs with a P content in dry matter (DM) of biosolids of 20 gP/kgDM or higher in the coming years must perform mandatory P recovery. In terms of defined thresholds, return and excess sludges were identified as the most feasible WWTP process streams for P recovery. In a 1 m3 BioP-Rec module a 3 stage process was established. From the P-rich water-phase of the return sludge produced in stage 1, which contained 0.051 kg/m3 of free P, 77.56% was taken up by P-depleted brewer's yeast Saccharomyces pastorianus in 3 h in stage 2. In stage 3, the yeast was concentrated in 1 h to produce yeast sludge as a fertilizer product. We demonstrated a novel pilot-scale process for the production of bio-based P-rich fertilizer.
期刊介绍:
Engineering in Life Sciences (ELS) focuses on engineering principles and innovations in life sciences and biotechnology. Life sciences and biotechnology covered in ELS encompass the use of biomolecules (e.g. proteins/enzymes), cells (microbial, plant and mammalian origins) and biomaterials for biosynthesis, biotransformation, cell-based treatment and bio-based solutions in industrial and pharmaceutical biotechnologies as well as in biomedicine. ELS especially aims to promote interdisciplinary collaborations among biologists, biotechnologists and engineers for quantitative understanding and holistic engineering (design-built-test) of biological parts and processes in the different application areas.