本文選題：人工濕地 + 自然濕地��； 參考：《南昌大學(xué)》2015年碩士論文

【摘要】：湖濱地區(qū)面源污染以農(nóng)村生活污水為主,未經(jīng)處理排放而導(dǎo)致大量的污染物流入湖區(qū),對湖泊富營養(yǎng)化有著舉足輕重的影響。因?yàn)閰浅擎?zhèn)特殊的地理位置以及水域環(huán)境(贛江和修河入鄱陽湖口),成為鄱陽湖相關(guān)研究的主要現(xiàn)場。吳城鎮(zhèn)高濃度生活污水(捕魚期鹽度也較高)未經(jīng)任何預(yù)處理直接由明渠排入湖區(qū),嚴(yán)重影響近湖區(qū)的水環(huán)境。本文以吳城鎮(zhèn)堤壩外菜田為研究基地,建立人工濕地試驗(yàn)地聯(lián)合湖區(qū)內(nèi)的自然濕地處理該地區(qū)的生活污水,考察人工濕地聯(lián)合自然濕地對高濃度生活污水的凈化效果及鹽度對其的影響、污染物沿程的變化情況和人工濕地微生物數(shù)量變化,并建立人工濕地-自然濕地聯(lián)合處理湖濱地區(qū)高鹽生活污水示范基地。試驗(yàn)結(jié)果表明,人工濕地-自然濕地聯(lián)合有較好處理湖濱地區(qū)高鹽生活污水的效果。吳城鎮(zhèn)生活污水污染物排放的濃度波動(dòng)范圍比較大,試驗(yàn)期間9-12月早上含鹽量(665.92-1564.51)mg/L較高,在試驗(yàn)期間污染物排放濃度變化范圍COD(150-417)mg/L、TN(32-162)mg/L、NH3-N(18-149)mg/L和TP(4-21)mg/L;濕地系統(tǒng)(人工濕地+自然濕地)對污染物的去除效率CODTNNH3-NTP,平均去除效率分別達(dá)到了66.61%、57.12%、49.16%和41.31%,且人工濕地對細(xì)菌總數(shù)有較好的去除效率(50%),溫度和溶解氧是影響人工濕地總?cè)コ实闹匾蛩亍８魑廴疚锶コ?秋季(9-11月)春季(3-5月)冬季(12-2月),污染物(除COD外)排放表現(xiàn)季節(jié)性規(guī)律,秋季冬季春季,COD和TP在去除效率上表現(xiàn)出,秋季春季冬季的季節(jié)規(guī)律。在一定范圍內(nèi)鹽度(以Cl-計(jì))對NH3-N、TP去除率的影響極大,對TN去除率的影響較微弱,對COD去除率影響可以忽略不計(jì)的�？傮w看來,水平潛流人工濕地污染物的降解以水平推流式,污染物(除TP外)在前段去除率較高,后面降解較為緩慢,主要是受溶解氧的制約。對于TP,若溫度較高,微生物的利用比基質(zhì)、植物的吸附截留更多;溫度較低,基質(zhì)、植物的吸附截留比微生物的利用更多。
[Abstract]:Non-point source pollution in lakeshore area is mainly rural domestic sewage. Untreated discharge causes a large amount of pollutants to flow into the lake area, which plays an important role in lake eutrophication. Because of the special geographical location and water environment of Wucheng (Ganjiang River and Xiuhe River entering Poyang Lake mouth), it has become the main research site of Poyang Lake. The high concentration domestic sewage in Wucheng (which has high salinity in fishing period) is discharged directly from the open canal into the lake area without any pretreatment, which seriously affects the water environment near the lake area. Based on the vegetable field outside the dyke and dam of Wucheng city, the artificial wetland experimental site was established to treat the domestic sewage in the lake region. The purification effect of constructed wetland combined with natural wetland on high concentration domestic sewage and the effect of salinity on it were investigated. The changes of pollutants along the course and the quantity of microorganism in constructed wetland were investigated. A demonstration base for the combined treatment of high salt domestic sewage by artificial wetland and natural wetland was established. The experimental results show that the combination of constructed wetland and natural wetland has a good effect on the treatment of high-salt domestic sewage in lakeside area. The concentration of pollutants discharged from domestic sewage in Wucheng has a relatively wide range of fluctuations. The salt content in the morning of September-December is high, 665.92-1564.51 mg / L, During the test period, the range of pollutant discharge concentration was 150-417 mg / L ~ (-1) N ~ + 32 ~ 162mg 路L ~ (-1) NH _ 3-N ~ + 18-149 mg / L and TPN _ 4-21 ~ (mg / L); the removal efficiency of pollutants in wetland system (constructed wetland) was CODTNNH _ 3-NTPN, and the average removal efficiency reached 66.611g / L ~ 57.127.12g / L ~ 49.16% and 41.31% respectively, and the artificial wetland had a higher total number of bacteria. Temperature and dissolved oxygen are important factors affecting the total removal efficiency of constructed wetland. The removal efficiency of each pollutant is from September to November in autumn) from September to November in spring) from May to May in winter. The emission of pollutants (except COD) shows seasonal regularity, and the removal efficiency of COD and TP in autumn and winter show seasonal regularity, and the seasonal regularity of winter in autumn and spring. In a certain range of salinity (in the form of Cl-), the effect of salinity on the removal rate of NH _ 3-NN _ 2O _ (TP) is great, but the effect on TN removal rate is weak, and the effect on COD removal rate can be neglected. In general, the degradation of pollutants in horizontal subsurface flow constructed wetland is pushed horizontally. The removal rate of pollutants (except TP) is higher in the front segment, and the degradation rate is slower in the later stage, which is mainly restricted by dissolved oxygen. For TPs, if the temperature is higher, the utilization of microorganism is more than that of substrate, and the adsorption retention of plant is more than that of microorganism when the temperature is lower.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X799.3

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