摘要
通过72 h的连续批量实验,分析高盐度生活污水在下水道环境中的主要微生物反应以及这些微生物反应对水质的影响。实验共进行两组,每组均在3种不同条件的反应器中进行,各反应器中均进行连续72h小时的取样和监测,确定摄氧率(OUR)、硝态氮(NOX)、氨氮(NH3)和溶解态有机碳(DOC)随时间的浓度变化。通过对实验数据的分析,结果表明高、低盐度生活污水在下水道环境中的影响污染物降解的主要微生物反应都是异养微生物的好氧增殖以及有机颗粒物的水解。但与低盐度污水不同的是,高盐度污水中的①硝化反应作用较为明显;②反硝化速率较快,而且由于硝化作用明显,可提供足够的硝氮,因此反硝化反应也不可忽略。根据此分析结果,以活性污泥3号模型(ASM3)为基础,综合考虑复氧、水力和环境温度影响,建立了下水道污水水质模型。经验证,模型可较好地模拟溶解氧、溶解性有机碳、氨氮和硝氮等物质的下水道中的浓度变化。
Previous studies showed that the municipal sewage with low salinity could achieve self-purification by microbial reactions in sewer. However, the salinity in Hong Kong is distinctly high because seawater is routinely supplied for toilet flushing, and the study on high saline sewage was not presented yet. Thus, we conducted 2 sets of lab-experiments to evaluate the capacity of self-purification and the main microbial reactions in high saline sewage. Three reactors for each set experiment were used to simulate difference conditions in sewers. Continues sampiing and measurement were done to determine the oxygen uptake rate （OUR）, dissolved organic carbon （DOC）, ammonium （ NH3 ） and nitrate/nitrite （ NOX ） in 72h experiment. The result from data analysis showed that the high saline sewage was also capable to achieve self-purification in sewer. In high saline sewage, the main microbial reactions to pollutant degradation were aerobic growth of heterotrophs and hydrolysis of organic particulate, which was similar to that in low saline sewage. But differing from low saline sewage, nitrification and denitrification in high saline sewage could not be ignored. Based on these conclusions, a mathematical ASM3-based sewer process model was built for simulate the wastewater transformation in sewage. By full-scale verification, the result showed that the model within modules of hydraulics, re-aeration and temperature effect, could well predict the DO, DOC, NH3 and NOX variation in sewer.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第2期97-101,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
中山大学与香港科技大学合作研究项目
关键词
下水道
高盐度
生活污水
水质模型
活性污泥3号模型
sewer
high salinity
sanitary sewage
wastewater quality model
activated sludge model No. 3 （ ASM3 ）
