Anaerobic digestion (AD) is an environmentally friendly technology that simultaneously stabilizes biowaste and produces biogas. Conventional AD faces challenges such as inadequate substrate degradation and low methane purity. Pressure-centric regulation serves as an AD optimization strategy that can enhance the digestion efficiency and generate higher-energy-value biogas. However, limited reviews have been undertaken to focus on this technology. This review is designed to discuss innovations in ex-situ high-pressure pretreatment and in-situ high-pressure anaerobic digestion (HPAD) processes. Moreover, comprehensive understandings on the intrinsic mechanisms of HPAD are critically examined, including physicochemical reaction principles and microbial responses. The constraints currently curtailing these technologies and potential mitigation strategies are also scrutinized. Additionally, current knowledge gaps and future research directions on mechanisms, model fitting, and engineering practices are presented. Overall, this work highlights the feasibility of pressure-centric regulated AD and provides novel insights to overcome existing technical barriers in its application.

中文翻译：

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以压力为中心的调节以实现高效厌氧消解：最新技术、挑战和前景


厌氧消化 （AD） 是一种环保技术，可同时稳定生物废物并产生沼气。传统 AD 面临底物降解不足和甲烷纯度低等挑战。以压力为中心的调节是一种 AD 优化策略，可以提高消化效率并产生更高能量值的沼气。然而，针对这项技术进行的审查有限。本综述旨在讨论非原位高压预处理和原位高压厌氧消化 （HPAD） 工艺的创新。此外，对 HPAD 的内在机制的全面理解，包括物理化学反应原理和微生物反应进行了批判性检查。目前限制这些技术和潜在缓解策略的限制因素也受到了审查。此外，还介绍了当前关于机构、模型拟合和工程实践的知识差距和未来研究方向。总体而言，这项工作强调了以压力为中心的受监管 AD 的可行性，并为克服其应用中的现有技术障碍提供了新的见解。