發(fā)布時間：2018-03-29 20:27

  本文選題：下水道　切入點：硫化氫　出處：《華南師范大學學報(自然科學版)》2017年02期

【摘要】：沿海城市下水道易受潮汐影響,使得部分海水周期性地進出城市排水管網(wǎng),從而改變下水道中的硫化氫產(chǎn)生與轉(zhuǎn)化過程.為此,通過實驗和數(shù)學模型評估香港排水管網(wǎng)某感潮管段受潮汐作用影響.實驗結(jié)果表明:潮汐作用顯著提高了下水道污水的硫化物峰值,導致硫化氫污染情況明顯惡化;硫化物質(zhì)量濃度與潮位呈反比,出現(xiàn)周期性變化;海水入侵帶來的溶解氧和稀釋作用一定程度上緩和了這一影響,體現(xiàn)為大潮時的硫化物峰值質(zhì)量濃度相對提升較少;建立的下水道感潮管段水質(zhì)數(shù)學模型可以較好地模擬、再現(xiàn)這一過程.由此可見,潮汐作用使下水道的硫化氫污染問題惡化并使硫化物質(zhì)量濃度隨潮汐漲退呈周期性變化,通過數(shù)學模型優(yōu)化控硫藥劑投加方案可以實現(xiàn)更有效、更經(jīng)濟的感潮管段硫化氫污染控制.
[Abstract]:Sewers in coastal cities are vulnerable to tidal effects, which make part of sea water periodically enter and exit urban drainage networks, thus changing the process of generation and transformation of hydrogen sulfide in sewers. An experimental and mathematical model is used to evaluate the tidal effect on a tidal section of Hong Kong drainage network. The experimental results show that the tidal action can significantly increase the peak value of sulphide in sewer sewage and lead to the deterioration of hydrogen sulfide pollution. The concentration of sulfides is inversely proportional to the tidal level, and periodic changes occur, and the dissolved oxygen and dilution brought about by seawater intrusion soften this effect to some extent, which is reflected in the relatively small increase in the peak mass concentration of sulphide during the spring tide. The established mathematical model of water quality in tidal pipe section of sewers can well simulate and reproduce this process. Thus, the problem of hydrogen sulfide pollution in sewers is aggravated by tidal action and the concentration of sulfides varies periodically with the tide rising and retreating. A more effective and economical control of hydrogen sulfide pollution in tidal pipe can be realized by optimizing the adding scheme of sulfur control agent by mathematical model.
【作者單位】： 華南師范大學化學與環(huán)境學院;廣州市番禺污水治理有限公司;
【基金】：國家自然科學基金項目(51178192) 廣東省高等學校優(yōu)秀青年教師培養(yǎng)計劃項目(YQ2015047) 廣州市珠江科技新星項目(2014J2200048)
【分類號】：P731.23;TU992;X703
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本文編號：1682715