發(fā)布時(shí)間：2018-01-01 02:23

  本文關(guān)鍵詞：微曝氣強(qiáng)化生態(tài)浮床生物膜特性研究　出處：《西南交通大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 生態(tài)浮床 徽曝氣 填料 生物膜

【摘要】：隨著中國(guó)經(jīng)濟(jì)的飛速發(fā)展,環(huán)境污染日益嚴(yán)重。在中國(guó)淡水資源緊缺的情況下,由于個(gè)別企業(yè)的偷排漏排導(dǎo)致河流、湖泊等自然水體有機(jī)污染物(CODcr)、氨氮等不能達(dá)到相應(yīng)標(biāo)準(zhǔn),水污染問(wèn)題尤為突出。生態(tài)浮床技術(shù)作為污染自然水體的治理方法之一,近年來(lái)備受廣大專家學(xué)者的重視。雖然這項(xiàng)技術(shù)引入國(guó)內(nèi)時(shí)間較晚,但是發(fā)展迅速。通過(guò)近幾年的研究,生態(tài)浮床已經(jīng)廣泛的應(yīng)用于自然水體的治理中。生態(tài)浮床技術(shù)是通過(guò)植物深入水中的強(qiáng)大根系來(lái)吸收、吸附、截留水體中的氮磷等營(yíng)養(yǎng)物質(zhì),并以收獲植物體的形式將其去除,從而達(dá)到凈化水質(zhì)的目的。然而,傳統(tǒng)生態(tài)浮床僅靠植物的吸收和根系微生物的作用,處理系統(tǒng)簡(jiǎn)單,處理效率和效果都相對(duì)較差。本論文所提出微曝氣強(qiáng)化生態(tài)浮床是在傳統(tǒng)生態(tài)浮床的基礎(chǔ)上增加了微孔曝氣和懸掛填料,即增加了水體的溶解氧和微生物可附著表面積。微曝氣強(qiáng)化生態(tài)浮床不僅可以增加了植物對(duì)污染物的去除效果,在填料表面形成的生物膜也增加了微生物對(duì)污染水體的凈化效果。本研究構(gòu)建了以紫鳶尾為浮床植物,懸掛填料,人工曝氣的微曝氣強(qiáng)化生態(tài)浮床.研究了微曝氣強(qiáng)化生態(tài)浮床填料表面生物膜的特性；對(duì)比了微曝氣強(qiáng)化生態(tài)浮床在不同曝氣條件下和不同填料表面上生物膜的生長(zhǎng)情況及微生物活性；研究填料表面生物膜的微生物數(shù)量、活性在不同溫度下的生長(zhǎng)和變化情況,并總結(jié)微生物在不同水深處的分布規(guī)律,為微曝氣強(qiáng)化生態(tài)浮床技術(shù)應(yīng)用于實(shí)際工程提供了一定的理論基礎(chǔ)和設(shè)計(jì)支撐。通過(guò)實(shí)驗(yàn)得出以下主要結(jié)論：1、微生物的生長(zhǎng)速率和數(shù)量隨著曝氣量的增大而增大,曝氣強(qiáng)度增加到7.5L/min的時(shí)候微生物的生長(zhǎng)速率和數(shù)量生長(zhǎng)情況趨于穩(wěn)定,建議微曝氣強(qiáng)化生態(tài)浮床運(yùn)行曝氣量選擇7.5L/min。微生物活性隨著曝氣量的增加而增加。2、本實(shí)驗(yàn)分別在每條填料水下5cm、25cm、50cm處取樣。由實(shí)驗(yàn)數(shù)據(jù)可知,填料上的微生物的數(shù)量分布規(guī)律是：5cm處微生物數(shù)量25cm處微生物數(shù)量50cm處微生物數(shù)量。而三處填料的微生物活性基本一樣,說(shuō)明水深對(duì)微生物活性的影響并不大。3、在相同實(shí)驗(yàn)條件下,不同種類填料表面微生物量對(duì)比：組合填料上微生物量水草型填料上微生物量彈性填料上微生物量；三種不同填料表面微生物都表現(xiàn)了基本相同活性。4、經(jīng)計(jì)算微曝氣強(qiáng)化生態(tài)浮床中生物膜對(duì)有機(jī)污染物的去除貢獻(xiàn)率為47.17%。
[Abstract]:With the rapid development of China economy, increasingly serious environmental pollution. The shortage of freshwater resources Chinese, as individual companies illegal discharge to rivers, lakes and other natural water organic pollutants (CODcr), ammonia nitrogen can not reach the corresponding standard, the problem of water pollution is particularly prominent. The ecological floating bed technology as one of the treatment methods the pollution of natural water in recent years, many experts and scholars. Although the technology introduced late, but rapid development. Through the research of recent years, the application of ecological floating bed has been widely in natural water bodies. The governance of ecological floating bed technology is a strong root plants through deep water to absorb. The adsorption and retention of nitrogen and phosphorus and other nutrients, and to harvest the plants in the form of its removal, so as to achieve the purpose of purifying water quality. However, the traditional ecological floating bed plants by absorption and Root microbes, processing system is simple and the processing efficiency and the effect is relatively poor. The proposed micro aeration enhanced ecological floating bed is based on the traditional ecological floating bed on the increase of micropore aeration and suspension filler, which increased the dissolved oxygen and microbial water can be attached to the surface area of micro aeration enhanced ecological floating. The bed can not only increase the pollutant removal efficiency of plants in biofilm formed on the surface also increases the purification effect of microorganism on contaminated water. This study was constructed with purple iris as floating bed plants, suspension filler, artificial aeration micro aeration enhanced ecological floating bed was studied. The characteristics of micro aeration enhanced ecological floating bed biofilm; comparison of growth and microbial activity in micro aeration enhanced ecological floating bed in different aeration conditions and different fillers on the surface of the biofilm on the surface of the filler; The number of microbial biofilm activity, growth and changes at different temperatures, and summarizes the microbial distribution in different water depths, provides a theoretical basis and design support for micro aeration and strengthen the application of ecological floating bed technology in engineering. Through the experiment we draw the following conclusions: 1, the growth rate and the number of microorganisms increases with the increase of aeration rate, aeration intensity increased to the growth rate and the number of times of microbial 7.5L/min growth tends to be stable, the proposed micro aeration enhanced ecological floating bed running aeration 7.5L/min. microbial activity with the increase of aeration rate and the increase of.2, the experiments on each packing under water 5cm, 25cm, 50cm sampling. The experimental data showed that the number of microorganisms on the distribution of filler is: 5cm 25cm 50cm the number of microbial microorganisms at three microbial quantity. Microbial activity packing is basically the same, that depth of microbial activity did not affect the.3, under the same experimental conditions, comparison of different kinds of fillers: microbial surface combination packing packing type microbial biomass of aquatic microbial biomass on elastic filler microbial biomass; three different microbial filler surface showed almost the same activity.4. The calculation of micro aeration biofilm enhanced ecological floating bed in the removal of organic pollutants in the contribution rate of 47.17%.

【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X52

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