發(fā)布時間：2018-06-21 04:16

  本文選題：人工濕地 + 磷吸附��； 參考：《華中農(nóng)業(yè)大學(xué)》2015年碩士論文

【摘要】：隨著巢湖周邊工農(nóng)業(yè)的發(fā)展,大量含磷污染物排入其中,使其污染日趨嚴重,藍藻水化等頻繁發(fā)生。人工濕地處理系統(tǒng)是處理湖泊水體污染的一種重要方式。本課題以巢湖周邊各種基質(zhì)、水生植物、陸生植物等為研究對象,設(shè)計吸附柱室內(nèi)模擬人工濕地系統(tǒng)除磷,研究基質(zhì)厚度、進水碳磷濃度比、基質(zhì)組合以及滯留時間對人工濕地除磷效果的影響,以期為巢湖低污染水體的處理提供技術(shù)支撐,主要研究結(jié)果如下:(1)對于土壤I(采自黃林頭鎮(zhèn)),添加5種植物粉末、碎屑浸提液并不能促進其對溶液中磷的吸附作用,反而會起到抑制作用;對于土壤II(采自青龍嘴鎮(zhèn)),添加5種植物的粉末浸提液也會抑制其對溶液中磷的吸附作用,但是添加植物碎屑浸提液卻能明顯促進其對溶液中磷的吸附。(2)對于基質(zhì)厚度的選擇而言,70 cm以及50 cm基質(zhì)層所對應(yīng)的溶解態(tài)磷(SRP)去除率相似,兩者SRP平均去除率均在55%左右,無顯著差異,且二者顯著高于30 cm層的44%,P0.01。三種不同厚度的基質(zhì)對應(yīng)的溶解性總磷(DTP)平均去除率無顯著差異。故50 cm基質(zhì)層厚度為最佳厚度。(3)對于進水碳磷濃度比而言,當各裝置對SRP的去除趨于穩(wěn)定時,未添加葡萄糖的裝置SRP去除率最低為約50%,C/P為50/1以及100/1的裝置對于SRP的去除率維持在70%左右,而C/P為150/1以及200/1的裝置對于SRP的去除率保持在80%左右,C/P為250/1的裝置對于SRP的去除率最高,為95%左右�？傮w而言,有外源葡萄糖添加的裝置SRP去除率顯著高于沒有添加葡萄糖的,P0.05。DTP去除率情況與SRP相似。這說明在一定濃度范圍內(nèi),C/P越大,越有利于裝置對于水體磷的去除效果,最佳碳磷進水濃度比應(yīng)為250/1。(4)對于組合基質(zhì)而言,經(jīng)過連續(xù)13周實驗,在第12周時,空白+鐵錳顆粒(CK+IM)以及空白+陸生植物碎屑+鐵錳顆粒(CK+TP+IM)對SRP的去除率顯著高于空白+水生植物碎屑(CK+AP)以及空白+藻類碎屑(CK+AL),在第13周時四者并無顯著性差異;各裝置對DTP的去除情況與SRP相似。綜合分析可知,CK+IM為各組合基質(zhì)中的最佳選擇。(5)對于滯留時間而言,通過比較7種主要組合基質(zhì)在3 h、6 h、9 h、12 h下的SRP及DTP去除率發(fā)現(xiàn),3 h滯留時間所對應(yīng)的磷去除率顯著高于或等于其它滯留時間對應(yīng)的P去除率。綜合考慮實際情況中裝置對單位時間內(nèi)水體的處理量,滯留時間相對越短,其處理量越大,故3 h為其最佳滯留時間。
[Abstract]:With the development of industry and agriculture around Chaohu Lake, a large number of phosphorus pollutants are discharged into it, which makes the pollution become more and more serious, and cyanobacteria hydration occurs frequently. Artificial wetland treatment system is an important way to deal with lake water pollution. In this paper, various substrates, aquatic plants and terrestrial plants around Chaohu Lake are taken as the research objects. The adsorption column indoor simulated constructed wetland system is designed to remove phosphorus, to study the substrate thickness and the ratio of carbon to phosphorus concentration in the influent. The effects of substrate combination and retention time on phosphorus removal efficiency of constructed wetland were studied in order to provide technical support for the treatment of low pollution water in Chaohu Lake. The main results were as follows: 1) for soil I (collected from Huanglintou Town, five kinds of plant powder were added. The detrital extract could not promote the adsorption of phosphorus in the solution, but would inhibit the adsorption of phosphorus in the solution, and for soil II (collected from Azure Dragon), the addition of 5 kinds of plant powder extract could also inhibit the adsorption of phosphorus in the solution. However, the addition of phytoclastic extract could significantly promote the adsorption of phosphorus in the solution. The removal rates of dissolved phosphorus SRPs corresponding to the substrate thickness of 70 cm and 50 cm were similar, and the average removal rates of both SRP were about 55%. There was no significant difference between them, and they were significantly higher than that in 30 cm layer (P 0.01). There was no significant difference in the average removal rate of dissolved total phosphorus (DTP) among the three kinds of substrates with different thickness. Therefore, the optimum thickness of 50cm substrate layer is. 3) for the ratio of carbon to phosphorus concentration, when the removal of SRP tends to be stable, The SRP removal rate of the device without glucose was the lowest about 50% C / P 50 / 1 and the SRP removal rate of 100 / 1 was about 70%. The SRP removal rate of the device with C / P = 150 / 1 and 200 / 1 is about 80% and the highest removal rate of SRP is about 95% for the device with C / P = 250 / 1. In general, the removal rate of SRP in the device with exogenous glucose addition was significantly higher than that in P0.05.DTP without glucose addition. The removal rate of SRP was similar to that of SRP. This shows that the larger the C / P ratio in a certain concentration range, the better the removal effect of phosphorus in the water. The optimum ratio of carbon and phosphorus influent concentration should be 250 / 1.4) for the combined substrate, after 13 consecutive weeks of experiments, at the 12th week, The removal rates of SRP by CK IMM and CK TP IMI were significantly higher than those of CK APs and CK APs, but there was no significant difference among the four groups at the 13th week. The removal of DTP by each device is similar to that of SRP. Comprehensive analysis shows that CK IM is the best choice in each combination. By comparing the removal rates of SRP and DTP of 7 major combinations of substrates at 3 h, 6 h, 9 h and 12 h, it was found that the phosphorus removal rate corresponding to the retention time of 3 h was significantly higher than or equal to that of other retention times. Considering the actual situation, the shorter the residence time is, the larger the treatment capacity is, so 3 h is the best time.
【學(xué)位授予單位】：華中農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X524

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