<p>Anaerobic digestion is a key technology for treating organic waste, but high total ammonia nitrogen (TAN) concentration can cause ammonia inhibition, impacting system stability and biogas production. Ammonia stripping is an effective solution that prevents inhibition and recovers nitrogen. The study is a narrative review that examines the ammonia inhibition threshold and evaluates various stripping methods, including pre-treatment, post-treatment, in-situ, and side-stream stripping. The applicability and efficiency of these methods were compared, with a focus on in-situ and side-stream stripping for nitrogen recovery and inhibition alleviation. Through analysis of the ammonia inhibition threshold, the TAN concentration in the digester has been controlled below 5&#xa0;g/L, which may effectively avoid ammonia inhibition risks. From an economic standpoint, there is no need for further reduction. This significantly improves the feasibility and cost-effectiveness of in-situ or side-stream ammonia stripping technologies. Furthermore, this study discussed the optimization of ammonia stripping parameters from the perspectives of ammonia inhibition threshold, differences in protein, uric acid, and carbohydrate degradation, which have rarely been described in previous literature. In-situ and side-stream ammonia stripping are also affected by anaerobic digestion conditions, reactor configuration, and digestate composition, which restrict the ammonia removal efficiency. It is necessary to achieve effective matching between fermentation conditions and stripping processes. Advances in stripping technology are expected to enhance its role in anaerobic digestion, achieving environmental and economic benefits.</p> Graphical abstract <p></p>