With the increased popularity of two-stage anaerobic digesters, post-hydrolysis ammonia stripping (PHAS) has resurfaced as a new possible treatment configuration. This study discusses for the first time the semi-continuous operation of PHAS and compares it with the most used stripping configuration nowadays, side-stream ammonia stripping (SSAS), under similar conditions using air or renewable natural gas (RNG) as stripping mediums. Ammonia stripping operating conditions were set to pH 9.5, 55 °C, and flowrate of 100 L gas/L/hour. RNG removed 50–58% of ammonia while air removed 70–78%. Interestingly, the PHAS system showed more flexibility and resilience than the SSAS system when testing parameters were changed. Volumetric and specific biogas production from PHAS and SSAS scenarios averaged up to 1.91 and 1.26 L/L/day and 831 and 701 L biogas/ kg VS/day under organic loading rates of 2.61 and 1.8 g VS/L/day, respectively.

随着两级厌氧消化器的日益普及，水解后氨汽提（PHAS）作为一种新的可能的处理配置重新出现。本研究首次讨论了 PHAS 的半连续操作，并将其与当今最常用的汽提配置（侧流氨汽提（SSAS））进行比较，在类似条件下使用空气或可再生天然气（RNG）作为汽提介质。氨汽提操作条件设置为 pH 9.5、55 °C 和流量 100 L 气体/L/小时。RNG 去除了 50-58% 的氨，而空气则去除了 70-78%。有趣的是，当测试参数发生变化时，PHAS 系统比 SSAS 系统表现出更大的灵活性和弹性。在有机负荷率为 2.61 和 1.8 g VS/L/天的情况下，PHAS 和 SSAS 情景的体积和比沼气产量平均分别高达 1.91 和 1.26 L/L/天，以及 831 和 701 L 沼气/kg VS/天。