海岛城市河道黑臭影响因素研究
2021-03-01鲍博王鹏刘梅邵力戎振英孙静亚
鲍博 王鹏 刘梅 邵力 戎振英 孙静亚



摘要 [目的]研究海岛城市河道黑臭的影响因素。[方法]以标志性海岛城市舟山市的黑臭河道为研究对象,探索海岛城市河道黑臭的特征。通过自配河道水体模拟河道水黑臭变化,分析其黑臭过程主要的特征性指标。[结果]河道水体COD、氨氮、硫酸盐含量越高则黑臭越显著,7 d内发生黑臭的阈值为COD>50 mg/L、DO<2 mg/L、氨氮>5 mg/L、硫酸盐>10 mg/L、温度30~40 ℃,黑臭明显。[结论]海岛型城市河道黑臭特征指标可作为对该类城市河道黑臭污染治理的理论参考。
关键词 黑臭污水;黑臭指标;化学制剂;影响因素;应急治理
中图分类号 X522 文献标识码 A 文章编号 0517-6611(2021)01-0056-04
doi:10.3969/j.issn.0517-6611.2021.01.015
Abstract [Objective]To study the influencing factors of black and odor in the rivers of island cities.[Method]Taking the black and odor rivers of the iconic island city Zhoushan as the research object, explored the characteristics of the black and odor rivers of the island cities. The black and odor changes of the river water are simulated by the self-distributed river water body, and the main characteristic indicators of the black and odor process are analyzed.[Result]The higher the content of COD, ammonia nitrogen, and sulfate in the river water, the more obvious the black and odor.The threshold value of black odor occurred within 7 days was COD > 50 mg/L, DO < 2 mg/L, ammonia nitrogen > 5 mg/L, sulfate > 10 mg/L,the temperature was 30 - 40 ℃, black odor was obvious. [Conclusion]The black and odor characteristic indicators of island-type urban rivers can be used as a theoretical reference for the treatment of black and odor pollution in such urban rivers.
Key words Black odor sewage;Black odor index;Chemical agents;Influencing factors;Emergency treatment
自中共十八大报告首次提出“海洋强国”战略以来,国家经济的发展逐步向海洋转移[1]。與沿海城市相比,海岛城市更具发展潜力。目前以舟山为代表的海岛城市大力发展海洋,提高经济收益,然而也为环境带来了负面效益,这其中就包括黑臭水体的产生[2]。由于地理原因,海岛城市远离其他城市。海岛城市淡水匮乏,致使自身调蓄功能降低,而城市内的淡水来源只有自然降雨。此外由于经济的发展致使城市人口增加,对水的需求也在递增,这就又限制了海岛城市的经济发展[3]。另一方面,海岛城市有独特的气候类型,常年多雨、台风导致大量水土流失,地表水中淤泥堆积,从而使平原地区增多,可利用面积增大,造成人口数量增多、水源短缺的现象。海岛城市调蓄水体含量降低,原有调蓄功能的水体丧失调蓄能力[4-5]。因此,笔……
