Faculty of Civil and Environmental Engineering, Gdansk University of Technology, ul. Narutowicza 11/12, 80-952 Gdansk, Poland.
Water Sci Technol. 2011;63(2):318-24. doi: 10.2166/wst.2011.056.
The efficiencies of denitrification and enhanced biological phosphorus removal (EBPR) in biological nutrient removal (BNR) activated sludge systems are strongly dependent on the availability of appropriate carbon sources. Due to high costs of commercial compounds (such as methanol, ethanol, acetic acid etc.) and acclimation periods (usually) required, the effective use of internal carbon sources for denitrification is preferred. The aim of this study was to determine the immediate effects of slowly biodegradable substrates on the denitrification capability and phosphate release/uptake interactions for a full-scale biomass process from the "Wschod" wastewater treatment plant (WWTP) in Gdansk (Poland). Since it is hard to distinguish the slowly biodegradable substrate in a direct way, a novel procedure based on batch experiments was developed and implemented. The laboratory experiments were carried out in two parallel, fully automatic batch reactors with the settled wastewater without pretreatment and after coagulation-flocculation. The removal of colloidal and particulate fractions resulted in the reduced observed process rates, such as denitrification, phosphate release and phosphate uptake (under aerobic and anoxic conditions). The reduction ranged from approximately 14% for the anaerobic P release to approximately 46% for the anoxic P uptake.
生物脱氮和增强生物除磷（EBPR）在生物营养素去除（BNR）活性污泥系统中的效率强烈依赖于适当碳源的可用性。由于商业化合物（如甲醇、乙醇、乙酸等）的高成本和通常需要的适应期，因此优先考虑有效利用内部碳源进行脱氮。本研究旨在确定缓慢生物降解基质对波兰格但斯克“Wschod”污水处理厂（WWTP）全规模生物量过程的脱氮能力和磷酸盐释放/摄取相互作用的直接影响。由于难以直接区分缓慢生物降解基质，因此开发并实施了一种基于批处理实验的新方法。实验室实验在两个平行的全自动批处理反应器中进行，使用未经预处理和混凝-絮凝处理的沉淀废水。胶体和颗粒部分的去除导致观察到的过程速率降低，例如脱氮、磷酸盐释放和磷酸盐摄取（在好氧和缺氧条件下）。这种减少的范围从厌氧 P 释放的约 14%到缺氧 P 摄取的约 46%。
