A single-stage partial nitrification/anammox (PN/A) system with biocarriers was used to treat the permeate from an anaerobic membrane reactor (AnMBR) processing organic fraction of municipal solid wastes. The suitable Ca/P ratio and high pH in the AnMBR permeate facilitated hydroxyapatite (HAP) formation, enhancing the biofilm attachment and the settleability of suspended sludge. This maintained sufficient biomass and a stable microbial structure after flushing to mitigate the free nitrous acid inhibition. Robust anammox bacteria in the biofilm and ammonia-oxidizing bacteria in the suspended sludge ensured that the PN/A system achieved an 87.3 % nitrogen removal efficiency at an influent NH4+-N concentration of 1802 mg/L. This study demonstrates that AnMBR permeate with high Ca, P and NH4+-N content is suitable for single-stage PN/A system with biocarriers due to the high resilience enhanced by HAP, offering a reference for the treatment of high-strength AnMBR permeate.

中文翻译：

---

羟基磷灰石介导的生物膜和悬浮污泥的协同结合增强了部分硝化/厌氧氨氧化（PN/A）系统处理高强度厌氧膜生物反应器（AnMBR）渗透物的弹性


使用带有生物载体的单级部分硝化/厌氧氨氧化（PN/A）系统来处理来自处理城市固体废物有机部分的厌氧膜反应器（AnMBR）的渗透物。 AnMBR 渗透液中合适的 Ca/P 比和高 pH 值有利于羟基磷灰石 (HAP) 的形成，增强生物膜的附着和悬浮污泥的沉降性。这在冲洗后保持了足够的生物量和稳定的微生物结构，以减轻游离亚硝酸的抑制。生物膜中强大的厌氧氨氧化菌和悬浮污泥中的氨氧化菌确保PN/A系统在进水NH4+-N浓度为1802 mg/L时实现87.3%的脱氮效率。该研究表明，高Ca、P和NH4+-N含量的AnMBR渗透液由于HAP增强的高弹性而适用于带有生物载体的单级PN/A系统，为高强度AnMBR渗透液的处理提供参考。