压差法测定生化需氧量过程中的生物降解与分析  

作　　者：赵松 汪涛 刘长宇 

机构地区：[1]五邑大学环境与化学工程学院,广东江门529020

出　　处：《环境保护与循环经济》2025年第2期65-71,共7页environmental protection and circular economy

基　　金：国家自然科学基金面上项目“基于环境微生物原位构建自适应高效稳定膜反应器用于水质BOD在线监测(22274117)”。

摘　　要：生化需氧量(BOD)是评估水体综合质量与环境风险的重要指标,其具有多种测定方法,但这些方法更多关注于测定结果,忽视了此过程中的生物降解作用。以考察生物降解为主,讨论并优化了压差法的测定条件,与国标法进行了准确度比较,并对培养过程中的生物降解进行监测与分析。结果表明:压差法的接种测定需要优选接种量和接种液类型,并且测定结果系统性偏高于国标法;在压差法的培养测定过程中存在明显的选择性降解,可以通过延长时间或提高温度进行规避。研究结果为压差法的准确测定和解决快速BOD测试方法存在的选择性问题提供了重要理论依据。Biochemical oxygen demand(BOD)is an important index to evaluate the comprehensive quality of water and environmental risk.There are many methods for its determination,but these methods focus more on the results and ignore the biodegradation in the process.Therefore,this article focuses on the study of biodegradation of the process,discusses and optimizes the measurement conditions of differential pressure method,compares the accuracy with the national standard method,and monitors and analyzes the biodegradation during the cultivation process.The results indicate that the differential pressure method of inoculation determination needs to optimize the selection of inoculation amount and inoculum type,and the measurement value is slightly higher than the national standard method.In addition,there is obvious selective degradation in the culture process of differential pressure method,but this selectivity can be avoided by extending the time or increasing the temperature.This study provided an important theoretical basis for the accurate determination of differential pressure method and the solution of selectivity problems existing in rapid BOD determination method.

关 键 词：压差法 生化需氧量 生物降解 选择性 

分 类 号：X826[环境科学与工程—环境工程]