本文選題：合流制　切入點(diǎn)：溢流污染　出處：《武漢理工大學(xué)》2013年碩士論文

【摘要】：目前我國許多城鎮(zhèn)的老城區(qū)沿用截流式合流制,該類排水系統(tǒng)雨天溢流污水會對受納水體產(chǎn)生嚴(yán)重污染。合流制管道溢流污染己成為部分城市水體水質(zhì)改善的主要制約因素之一。為了有效控制溢流污染,掌握合流制排水系統(tǒng)出流水量水質(zhì)特征是十分必要的。 本文以巢湖市環(huán)城河內(nèi)中心城區(qū)合流制排水系統(tǒng)為研究對象,在居巢區(qū)西苑廣場(四三酒店旁邊)和東風(fēng)路與巢湖中路交叉口(安德利購物廣場對面)各設(shè)一個監(jiān)測取樣點(diǎn),分別進(jìn)行了6場和3場雨的出流水質(zhì)水量監(jiān)測,分析結(jié)果表明,雨天合流制管道流量峰值一般滯后于雨強(qiáng)峰值5min～30min,除NH3-N外其它污染物指標(biāo)的濃度峰值與流量峰值幾乎同步出現(xiàn)：雨天污水中NH3-N的主要來源并非管底沉積物和地表污染物,而是生活污水和工業(yè)廢水。 通過對合流制排水系統(tǒng)晴雨天監(jiān)測數(shù)據(jù)比較結(jié)果表明,雨天污水中COD、TP、SS以及TN一般是旱流污水的幾倍之多,有時甚至是旱流污水的幾十倍。實(shí)測數(shù)據(jù)顯示COD濃度最大值是旱流污水的32倍,SS濃度最大值是旱流污水的75.75倍,TN濃度最大值是旱流污水的2.28倍,TP濃度最大值是旱流污水的10.20倍。 為了核算一場降雨中有多少污染物被有效處理,引入了污染物削減率的概念,并基于雨天合流制排水系統(tǒng)出流監(jiān)測數(shù)據(jù)推算了不同截流倍數(shù)的污染物削減率及其排水系統(tǒng)工程附加投資。對于巢湖市環(huán)城河內(nèi)中心城區(qū)而言,截流倍數(shù)取4.0其單位投資環(huán)境效益實(shí)現(xiàn)最大化。本文還建立了污水處理廠處理負(fù)荷預(yù)測方法,該方法可預(yù)測污水處理廠在不同截流倍數(shù)下的進(jìn)水量。若污水處理廠不增設(shè)截流污水處理設(shè)施,該方法還可用于反推截流倍數(shù)的最大值。
[Abstract]:At present, in many old urban areas of China, the system of closure and confluence is used. This kind of drainage system will cause serious pollution to the receiving water body in rainy days. The overflow pollution of the combined flow pipeline has become one of the main restricting factors for the improvement of water quality in some cities. In order to control the overflow pollution effectively, It is necessary to master the characteristics of income quantity in combined drainage system. In this paper, the confluence drainage system in the central urban area of Huancheng River in Chaohu City is studied. A monitoring sampling site is set up at Xiyuan Plaza (next to the four third Hotel) and the intersection of Dongfeng Road and Chaohu Middle Road (opposite the Andely Shopping Square) in Ju Chao District. The water quality and water quantity of 6 and 3 rainfall were monitored respectively. The results show that, The peak value of flow rate of combined flow pipeline in rainy days generally lags behind the peak value of rain intensity for 5 min or 30 min. The peak concentration of other pollutant indexes except NH3-N and the peak value of flow rate almost synchronize: the main source of NH3-N in rainy day sewage is not the bottom sediment and surface pollutant. It's domestic sewage and industrial waste water. By comparing the monitoring data of the combined drainage system on rainy and sunny days, the results show that the COD TPSS and TN in the rainwater are generally several times as many as the dry flow sewage. The measured data show that the maximum concentration of COD is 32 times higher than the maximum of SS of dry flow sewage, and the maximum of TN concentration of dry flow sewage is 75.75 times that of dry flow sewage, and the maximum concentration of TP is 10.20 times that of dry flow sewage. In order to calculate how many pollutants are effectively disposed of in a rainfall, the concept of pollutant reduction rate is introduced. Based on the monitoring data of discharge of combined drainage system in rainy days, the reduction rates of pollutants and the additional investment in drainage system engineering of different intercepting times are calculated. For the central city of Huancheng River in Chaohu City, the reduction rate of pollutants and the additional investment in drainage system engineering are calculated. In this paper, the method of load forecasting for sewage treatment plant is established, and the benefit of investment environment is maximized by taking 4.0 times of closure. This method can be used to predict the water intake of sewage treatment plant under different intercepting times, and it can also be used to push back the maximum of intercepting multiple if the sewage treatment plant does not add intercepting sewage treatment facilities.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU992;X52

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