中新天津生态城青坨子雨水泵站泵池及雨水管网臭味源分析

雨水泵站外排水体的恶臭对收纳水体水质具有重大影响。以中新天津生态城青坨子雨水泵站为研究区，通过对其泵池水样、雨水管网水样和底泥以及区域地下水的采样监测，分析了导致其外排水体黑臭的主要原因及潜在污染源。结果发现:雨水泵站泵池、雨水管网以及地下水中主要检出污染指标或污染物为电导率、溶解性总固体、总硬度、总碱度、化学需氧量、氯化物、SO₄2-、HCO₃-、钠、钾、钙和镁，其中雨水管网水样水质要略优于雨水泵站泵池水样和区域地下水水样。雨水管网底泥中主要检出污染物为氨氮和硫。雨水泵站泵池和雨水管网水体中的碳、氮和硫等在低氧环境中被还原生成CH₄、NH₃及H₂S，是导致泵池以及雨水管网水体恶臭的主要原因，而泵池及雨水管网水体和底泥中的硫化物在扰动条件下形成硫化铁、硫化锰是导致泵池以及雨水管网水体发黑的主要原因。另外，初期雨水及降雨径流污染是中新天津生态城青坨子雨水泵站污染物的主要来源。结合以上结论，中新天津生态城青坨子雨水泵站及雨水管网臭味处置拟采用曝气为主，防渗、清淤等技术相结合的方案。

ANALYSIS OF ODOR SOURCES IN STORMWATER PUMP POOL AND STORMWATER PIPE OF A STORMWATER PUMP STATION IN THE SINO-SINGAPORE TIANJIN ECO-CITY

The malodorous of the external drainage water from stormwater pumping station has a significant impact on the quality of surface water. In this paper, the Qingtuozi stormwater pumping station in the Sino-Singapore Tianjin Eco-city was selected, and the water sample from stormwater pump pool, the water and sludge samples from stormwater pipe, and the water sample of groundwater were collected to analysis the sources of black and odor from its external drainage water. Results indicated that the main pollution indicators or pollutants in the pump pool, rainwater pipe and groundwater were conductivity, total dissolved solids, total hardness, total alkalinity, chemical oxygen demand, chloride, sulfate, bicarbonate sodium, potassium, calcium and magnesium. The water quality of the stormwater pipe was slightly better than that of the pump pool and groundwater. The main pollutants detected in the sediment of the stormwater pipe were ammonia nitrogen and sulfur. The generation of methane, ammonia, and hydrogen sulfide under the low-oxygen environment in pump pool and stormwater pipe during carbon, nitrogen, and sulfur reduction was the major sources of odor from the external drainage water. Sulfur compounds in water samples of the pump pool and stormwater pipe could change into iron sulfide and manganese sulfide under the disturbance conditions, which was the major sources for the blackening of external drainage water. Sino-Singapore Tianjin Eco-city Qingtuozi Rainwater Pumping Station and stormwater pipe network odor disposal was expected to adopt aeration as the key process, combined with anti-seepage, dredging and other technologies. In addition, initial stormwater and rainfall runoff pollution is the main source of pollutants in the stormwater pumping station and stormwater pipe in Tianjin.