Abstract: Anaerobic fermentation is a complex and changeable process of microbiology. In order to improve the stability of biogas engineering operation, real-time data collection and monitoring of the anaerobic fermentation process are needed to realize statistics, analysis and scientific decision-making of biogas engineering operation. In this paper, the main parameters for on-line monitoring of fermentation temperature，pH，redox potential，ammonia nitrogen concentration and gas composition were summarized, and the structure and of on-line monitoring and control system was introduced, and the existing problems of online monitoring and control technology were summarized, and the research focus of the next step of on-line monitoring technology of biogas engineering was put forward, which provided reference for the improvement of on-line monitoring technology level of anaerobic fermentation.

Key words: anaerobic fermentation, data acquisition, on-line monitoring

摘要： 厌氧发酵是一个复杂、多变的微生物学过程，为了提高沼气工程运行的稳定性，需要对厌氧发酵过程进行实时数据采集和监控，以实现对沼气工程运行进行统计、分析以及科学决策。概述了发酵温度、pH、氧化还原电位、氨氮浓度和气体成分等在线监测的主要参数，介绍了厌氧发酵在线监控系统结构，总结了厌氧发酵在线监控技术目前存在的问题，并提出了今后的研究重点，为提升沼气工程厌氧发酵在线监控技术水平提供参考。

关键词: 厌氧发酵, 数据采集, 在线监控