平原水库典型嗅味污染物主要来源分析  

Analysis of main source of typical odorants in plain reservoirs

作　　者：李鑫斐 韩宏大 赵林[1] 韩正双[4] LI Xinfei;HAN Hongda;ZHAO Lin;HAN Zhengshuang(School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China;Tianjin Waterzworks Group Co.,Ltd.,Tianjin 300040,China;Tianjin Water Group Co.,Ltd.,Tianjin 300042,China;Tianjin Public Utility Design&Research Institute,Tianjin 300102,China)

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津市自来水集团有限公司,天津300040 [3]天津水务集团有限公司,天津300042 [4]天津市公用事业设计研究所,天津300102

出　　处：《给水排水》2024年第11期62-69,共8页Water & Wastewater Engineering

基　　金：天津水务集团有限公司科技项目(2022KY-01)。

摘　　要：蓝藻与放线菌均能产生2-甲基异莰醇(2-MIB)、土臭素(GSM),但已有研究往往只聚焦产嗅蓝藻或者放线菌,探究嗅味污染主要来源的研究匮乏,而这对平原水库嗅味污染防治至关重要。针对此现状,以天津市两座平原水库为研究对象,对水体与底泥进行连续监测。两座水库主要嗅味物质均为2-MIB,水库底泥中放线菌门微生物相对丰度在夏季均会上升,在八月达到最高。但是BR水库溶解态2-MIB在爆发期间占比会显著降低至20%左右,且2-MIB浓度与颤藻属呈极显著相关(P<0.01);而WQ水库在嗅味浓度达到高峰时,溶解态2-MIB占比仍为90%左右,且2-MIB浓度与产嗅藻相关性不显著。因此推断,BR水库嗅味污染爆发的主要原因是颤藻的增殖,而WQ水库受产嗅蓝藻的影响较小,放线菌是嗅味污染的主要来源。比较两座水库水质和地形发现,主要嗅味来源不同可能是因为WQ水库平均水深为7 m,而BR水库平均水深为4.6 m,水深浅更利于中下层产嗅藻光照的吸收;WQ水库总磷(TP)平均值为0.01 mg/L,而BR水库TP平均值为0.04 mg/L,可为藻类生长提供更多营养盐。结果表明同地区的平原水库嗅味主要来源可能不同,可通过溶解态嗅味物质占比、嗅味浓度与产嗅藻相关性进行分析。Both cyanobacteria and actinomycetes are capable of producing 2-Methylisoborneol(2-MIB)and geosmin(GSM).However,there is a deficiency in research on identifying the main source of odor pollution in reservoirs.Identifying the main source is crucial for preventing and controlling odor pollution in plain reservoirs.To address this situation,we conducted a study in two plain reservoirs in Tianjin,China.Continuous monitoring of the water bodies and sediments revealed that the main odorant in both reservoirs was 2-MIB,and the relative abundance of Actinobacteria in sediment increased and reached a maximum in August.Whereas,the proportion of dissolved 2-MIB in the BR reservoir decreased significantly to about 20%,and the concentration of 2-MIB was significantly correlated with Oscillaria(P<0.01).In contrast,the proportion of dissolved 2-MIB in the WQ reservoir remained at about 90%and the correlation between the concentration of 2-MIB and the cyanobacteria was not significant.It was inferred that the proliferation of Oscillaria was the main cause of the odor pollution in BR reservoir.WQ reservoir was less affected by odor-producing cyanobacteria,and actinobacteria were identified as the main source.Comparison of the water quality and topography of the two reservoirs showed that the difference in the main odor sources may be attributed to:The average water depth of WQ reservoir was 7 m,and the BR reservoir was 4.6 m.The shallow depth of the water was more conducive to the growth of odor-producing algae that living in subsurface layer.The average value of TP in the WQ reservoir was 0.01 mg/L,and the BR reservoir was 0.04 mg/L,it provided more nutrition for algal growth.The results indicated that the main sources of odor pollution in plain reservoirs in the same region may be different,and it can be analyzed through the percentage of dissolved odorants,and the correlation of odor concentration and cyanobacteria quantity.

关 键 词：水库 嗅味物质 2-MIB GSM 颤藻 

分 类 号：TU991[建筑科学—市政工程]