本文選題：高效藻塘 + 人工濕地��； 參考：《東華大學(xué)》2015年碩士論文

【摘要】：高效藻塘藻菌共生系統(tǒng)與人工濕地已成為低成本水處理技術(shù)的重要選擇之一。構(gòu)建高效藻塘與復(fù)合型富氧人工濕地耦合生態(tài)系統(tǒng)，形成藻類-細菌-濕地沉水植物的代謝共生體系和自動增氧人工濕地對重金屬協(xié)同進化過程。通過實驗分析耦合系統(tǒng)中影響重金屬去除的因素，對比各種組合下重金屬去除效果，確定耦合系統(tǒng)運行優(yōu)化參數(shù)。 結(jié)合實驗數(shù)據(jù)及理論分析表明：高效藻塘的藻濃度與重金屬去除效果具有直接聯(lián)系，溫度、光照和氮磷比等環(huán)境因素通過影響高效藻塘中的藻菌的生長，間接的影響重金屬去除效果。溫度與光照強度是影響藻濃度增殖的顯著性影響因素，光照時間與氮磷比不是影響藻濃度增殖的顯著性影響因素。 人工濕地中基質(zhì)對重金屬的吸附量隨進水pH升高而增大，濕地填充的三種基質(zhì)對三種重金屬的吸附量大小順序為黃沙細石英砂粗石英砂。噴灌進水對重金屬的去除效果優(yōu)于滴灌進水，單位重量下美人蕉的根吸收富集量要遠大于莖葉的富集量。滴灌進水下美人蕉根富集重金屬量大于噴淋進水下根的富集量，但噴淋進水下莖葉的富集量大于滴灌進水富集量。 經(jīng)過耦合系統(tǒng)處理后，生活廢水中的Zn、Cr、Pb三種重金屬的平均去除率達到94.4%、93.2%、98.8%，高效的去除了廢水中的重金屬。耦合系統(tǒng)三個處理單元中高效藻塘起主要作用，去除重金屬量最多，約占總?cè)コ康?0%。在高效藻塘中，重金屬的去除主要是依靠藻類的吸附代謝，，Zn、Cr、Pb三種重金屬依靠沉淀及微生物代謝作用去除的比例依次為8.7%、21.4%、19.1%。在16000cells·mL-1藻濃度下，單位體積的高效藻塘藻類對鉻、鋅鉛的最終吸附量分別為352.74ug、2657.28ug、1443.86ug。1g干藻粉能吸附鉻、鋅、鉛的平局量分別為0.92mg、4.34mg、2.05mg，整個預(yù)處理池干藻吸附的重金屬量基本等于水中重金屬的去除總量，表明冬季利用藻粉能夠去除廢水中的重金屬。 滴灌進水下美人蕉根部每千克富集Zn、Cr、Pb的量分別為925.6mg、261.6mg、494.1mg，均高于噴灌進水下Zn、Cr、Pb的540.9mg、86.1mg、352.3mg富集量，在滴灌進水下莖葉中重金屬含量相對于空白對照無明顯增長，噴灌進水下莖葉重金屬富集量遠遠高于滴灌，Zn、Cr、Pb的富集量分別為113.6mg、64.5mg、31.1mg。
[Abstract]:High efficiency algal pond algae symbiotic system and constructed wetland have become one of the important choices of low cost water treatment technology. An efficient algal pond coupled with a complex oxygen-enriched constructed wetland was constructed to form a symbiotic metabolic system of alga-bacteria-wetland submerged plants and a co-evolution process of heavy metals in an autooxygenated constructed wetland. The factors affecting the removal of heavy metals in the coupled system are analyzed experimentally and the operation optimization parameters of the coupling system are determined by comparing the removal effects of heavy metals under various combinations. Combined with the experimental data and theoretical analysis, it was shown that the algae concentration in the efficient algal pond was directly related to the removal efficiency of heavy metals, and the environmental factors, such as temperature, light and ratio of nitrogen to phosphorus, affected the growth of algal bacteria in the high efficiency algal pond. Indirect effects on the removal of heavy metals. Temperature and light intensity were significant influencing factors of algae concentration proliferation, and the ratio of light time to nitrogen and phosphorus was not the significant factor affecting algal concentration proliferation. The amount of heavy metals adsorbed by substrates in constructed wetland increased with the increase of influent pH, and the order of adsorption amount of three substrates filled with wetland for three heavy metals was yellow sand fine quartz sand coarse quartz sand. The removal of heavy metals by sprinkler irrigation was better than that by drip irrigation, and the root absorption and enrichment of Canna per unit weight was much larger than that of stem and leaf. The accumulation of heavy metals in Canna root under drip irrigation was greater than that in the root of spraying water, but the enrichment amount of stem and leaf in spraying water was greater than that in drip irrigation. After the coupled system treatment, the average removal rate of the three heavy metals in the domestic wastewater is 94.4% and 93.2% (98.8%), which can effectively remove the heavy metals in the wastewater. The high efficiency algal pond plays a major role in the three treatment units of the coupling system, and the removal of heavy metals is the most, accounting for about 60 percent of the total removal amount. In the high efficiency algal pond, the removal of heavy metals mainly depends on the adsorption and metabolism of algae. The proportion of heavy metal removal by precipitation and microbial metabolism is 8.7 and 21.4g / 19.1respectively. At the concentration of 16000cells mL-1, the final adsorption capacity of chromium, zinc and lead for algae per unit volume of high efficiency algal pond is 352.74ugn 2657.28ugn 1443.86ug.1g dry algae powder can adsorb chromium and zinc, respectively. The level of lead was 0.92 mg / g ~ 4.34 mg / g ~ 2.05 mg / g respectively. The amount of heavy metals adsorbed by the whole pretreatment pool was basically equal to the total amount of heavy metals in water, which indicated that the utilization of algae powder in winter could remove heavy metals in wastewater. Under drip irrigation, the accumulations of Zn ~ (2 +) Cr ~ (+) Pb in the roots of Canna plantain were 925.6 mg / kg ~ 261.6 mg / kg ~ 494.1 mg / kg, respectively, which were higher than that of ~ (54. 9) mg ~ (-1) mg ~ (86. 1) mg ~ (-1) mg of Zn ~ (2 +) Cr ~ (2 +) ~ (2 +) and Pb ~ (2 +) under sprinkler irrigation, but the contents of heavy metals in stems and leaves of stems and leaves under drip irrigation did not increase significantly compared with the control. The accumulation of heavy metals in stems and leaves under sprinkler irrigation was much higher than that in drip irrigation, which was 113.6 mg / g of 64.5mg / g ~ 31.1 mg / g respectively.
【學(xué)位授予單位】：東華大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X703.1

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