【摘要】：在寧夏回族自治區(qū)銀川市,由于部分地區(qū)地下水水源鐵錳含量超標(biāo),同時還遭受著不同程度的污染,如果用傳統(tǒng)工藝去處理這些水源,水質(zhì)通常達(dá)不到我國衛(wèi)生飲用水的標(biāo)準(zhǔn)要求,這就使得用新技術(shù)、新工藝去除地下水中的鐵錳成為當(dāng)前水企關(guān)注的重要課題。近年來,隨著除鐵錳工藝的不斷進步,生物法除地下水鐵錳成為一個經(jīng)濟高效的途徑。錳砂和石英砂是目前地下水除鐵錳常用的濾料,錳砂比重大,易板結(jié),在處理過程中會產(chǎn)生反沖洗耗氧量大、沖洗困難的問題;相比之下,石英砂比重較小,可以節(jié)省反沖洗水量。因此在除地下水鐵錳的技術(shù)中,尋找一種高效的濾料來代替錳砂,對地下水除鐵錳有重大的意義。本文旨在為銀川市第三水廠做前期試驗工作準(zhǔn)備,并據(jù)此作為銀川地下水生物法除鐵錳技術(shù)的應(yīng)用參考依據(jù)。本論文試驗以石英砂和錳砂為過濾材料。將地下水廠的混合菌泥接種擴大再培養(yǎng),然后以馴化掛膜的方式來形成生物除鐵錳濾料,進而處理人工模擬的含鐵錳地下水。此外還對濾層中分布的微生物進行了觀察。試驗分上半年和下半年兩個階段進行。通過實驗研究認(rèn)為:出于經(jīng)濟性和除鐵錳效率的考慮,在前兩個季度,選用石英砂濾料除地下水中的鐵錳更有效,后兩個季度的條件下錳砂濾料除地下水中的鐵錳更有效。綜合考慮,建議在本試驗的基礎(chǔ)上進一步考察石英砂-錳砂雙層濾料的除鐵錳效果。
[Abstract]:In Yinchuan City, Ningxia Hui Autonomous region, due to the excess iron and manganese content of groundwater sources in some areas, and at the same time suffering from various levels of pollution, if these water sources are treated with traditional techniques, The water quality is usually not up to the standard of sanitary drinking water in China, which makes it an important issue for water enterprises to remove iron and manganese from groundwater with new technology and process. In recent years, with the continuous progress of iron and manganese removal technology, biological removal of iron and manganese in groundwater has become an economical and efficient way. Manganese sand and quartz sand are the commonly used filter materials for removing iron and manganese from groundwater at present. Manganese sand has a large specific gravity and is easy to set up. In the process of treatment, the problem of large amount of backwashing oxygen consumption and difficulty in washing is produced. In contrast, the specific gravity of quartz sand is relatively small. Can save backwash water. Therefore, in the technology of removing iron and manganese from groundwater, it is of great significance to find an efficient filter material instead of manganese sand. The purpose of this paper is to prepare the preliminary test for Yinchuan No. 3 Water Plant and to serve as a reference for the application of biological method for removing iron and manganese from Yinchuan groundwater. In this paper, quartz sand and manganese sand are used as filtration materials. The mixed bacteria sludge of groundwater plant was inoculated and recultured, and then the biological iron and manganese removal filter material was formed by domesticating and hanging membrane, and then the artificial simulated iron and manganese groundwater was treated. In addition, the distribution of microbes in the filter layer was observed. The experiment is divided into two stages: first half and second half. The experimental results show that in the first two quarters, it is more effective to use quartz sand filter material to remove iron and manganese from groundwater, and the latter two seasons to remove iron and manganese from groundwater. In view of economic efficiency and efficiency of iron and manganese removal, it is more effective to select quartz sand filter material to remove iron and manganese from groundwater in the first two quarters. It is suggested that the effect of removing iron and manganese from quartz sand-manganese sand bilayer filter media should be further investigated on the basis of this experiment.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X523

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本文編號：2214093