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某化工废水五日生化需氧量实验
韩化轩,邬军,倪进娟,胡淑恒
0
(合肥工业大学资源与环境工程学院,合肥 230009;合肥茂腾环保科技有限公司,合肥 230000)
摘要:
采用水质指标评价法测定某化工厂废水的可生化性,其中CODCr测定采用在线监测,BOD5测定采用稀释接种法。通过各构筑物的水样实验,得到结论:稀释接种法适用于该化工废水BOD5的测定,可用水质指标法判定该废水的可生化性;采样及测定过程中产生的气泡对BOD5的测定结果有影响,需对待测水样中的气泡进行处理后才能有效保证实验结果的准确性,否则会使BOD5/CODCr偏大;当待测水样初始溶解氧浓度较低时,需要进行曝气处理,否则会使BOD5/CODCr偏小,且最佳曝气时间为15 min。
关键词:  水质指标评价法  稀释接种法  化工废水  溶解氧  曝气  BOD5
DOI:10.13610/j.cnki.1672-352x.20170524.002
基金项目:合肥市经信委企业技术改造对标诊断项目(项目号DBZD-2015002)资助。
Exploration of biochemical oxygen demand of the five-day chemical wastewater
HAN Huaxuan,WU Jun,NI Jinjuan,HU Shuheng
(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009;Hefei Maoteng Environmental Protection Technology Co. Ltd., Hefei 230000)
Abstract:
A water quality index evaluation method was used to detect the biodegradability of chemical wastewater. The CODCr of the water was measured by on-line monitoring and the BOD5 was determined using the dilution and seeding method. As displayed in the experimental data, bubbles had significant impacts on the measured results in the process of the sampling and determination, which were need to be removed in order to ensure the accuracy; otherwise the value of BOD5/CODCr would become large. Moreover, aeration was needed if the initial dissolved oxygen in the wastewater was low, and the optimum aeration time was 15 minutes.
Key words:  water quality indexes and evaluation method  dilution and seeding  chemical wastewater  dissolved oxygen  aeration  BOD5

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