本文關(guān)鍵詞：給水曝氣生物濾池—常規(guī)處理工藝除錳研究　出處：《華南理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 曝氣生物濾池 除錳 填料 生物作用

【摘要】：采用曝氣生物濾池(BAF)+常規(guī)工藝的給水處理工藝已經(jīng)得到廣泛成功的應(yīng)用。而對于地表水，一直以來由于其錳含量不高，通常不大于0.3mg/L， BAF+常規(guī)工藝最終出水的錳都能達(dá)標(biāo)，因而該工藝的除錳機理未受到特別的重視，也沒有作理論上的系統(tǒng)研究和描述。本試驗擬研究BAF+常規(guī)工藝處理高濃度錳污染的效果，分析影響其處理效果的因素，探究其除錳機理，以指導(dǎo)該工藝的生產(chǎn)應(yīng)用，為該工藝應(yīng)對原水高濃度錳污染的問題提供理論依據(jù)。 試驗結(jié)果表明：在原水錳濃度為0.53mg/L左右，給水BAF+常規(guī)處理工藝在濾速為16m/h，曝氣氣水比為0.2的情況下，對原水中錳的去除量達(dá)到0.48mg/L，能達(dá)到應(yīng)對高濃度錳污染地表水作為水源水對水處理工藝的要求。 生物濾池濾速越低，BAF＋常規(guī)處理工藝對錳的去除效果越好，且變化明顯。濾速是該工藝除錳效果的決定性因素。生物濾池氣水比越大除錳效果越好，適合的氣水比為0.2，能提高錳的去除效率而曝氣能耗適中。定期反沖洗對維持BAF＋常規(guī)工藝的除錳效果有重要作用，該工藝適合的反沖洗周期為1～2天。 原水中的氨氮對BAF＋常規(guī)處理工藝的錳去除效果沒有影響，，BAF中氧化除錳作用比生物對氨氮亞硝化和硝化作用對水中溶解氧的爭奪能力更強。BAF＋常規(guī)處理工藝能有效應(yīng)對高濃度氨氮（4mg/L）和錳（0.6mg/L）污染的原水。 采用不同填料的BAF＋常規(guī)處理工藝對原水中錳的去除效果和掛膜時間相差很大。生物濾池填料需要具有較大的比表面積和較強的吸附性能，才能易于生成錳的催化活性膜和提高錳的處理效果。頁巖陶粒能很好地達(dá)到BAF＋常規(guī)處理工藝對生物濾池填料的要求。 BAF＋常規(guī)處理工藝在掛膜成功、運行穩(wěn)定后，工藝對錳的去除主要靠的是接觸氧化作用，生物除錳作用只占工藝整體除錳作用的一小部分，約1/3的比例。生物濾池活性膜一旦成熟，是其中的非生物因素對除錳起主導(dǎo)的作用。 生產(chǎn)性試驗表明，采用輕質(zhì)陶粒濾料的上流式曝氣生物濾池能大大降低水頭損失，從而減少工藝的運行能耗，保持生物濾池良好的反沖洗效果，利于BAF＋常規(guī)處理工藝的經(jīng)濟(jì)有效運行。
[Abstract]:The biological aerated filter (BAF) + water treatment process of the conventional process has been applied widely and successfully. For surface water, has been because of the manganese content is not high, usually less than 0.3mg/L BAF+, the conventional process of the final effluent can reach the standard of manganese, manganese and mechanism are not emphasized in the process. There is no systematic study in theory and description. The purpose of this experiment was to study on the effect of conventional BAF+ process for treating high concentration of manganese pollution, analysis of factors affecting the treatment effect, to explore the mechanism of manganese removal, to guide the production and application process, to provide a theoretical basis for the process to deal with the high concentration of raw water manganese pollution problems.
The test results show that: in the raw water manganese concentration was about 0.53mg/L and BAF+ in the water treatment process filtration rate is 16m/h, aeration gas water ratio was 0.2, removal of manganese in water can reach up to 0.48mg/L, with high concentrations of manganese pollution in the surface water as the source water treatment process of water requirements.
Biological filtration velocity is low, BAF + conventional treatment process of manganese removal effect is better, and the change is obvious. The filtration rate is a decisive factor in the process of manganese removal effect. Bio filter gas water ratio increasing manganese removal effect is better, suitable for gas water ratio is 0.2, and the energy consumption of aeration can improve the removal efficiency of moderate Mn. Regular backwashing to maintain BAF + conventional process of manganese removal efficiency has an important role in the process for the backwash cycle for 1 to 2 days.
Ammonia nitrogen in raw water on BAF + conventional treatment process of manganese removal did not affect the effect of manganese on ammonia than biological nitrification and nitrification ability for.BAF of dissolved oxygen + conventional treatment process can effectively deal with the high concentration of ammonia nitrogen in BAF oxidation (4mg/L) and manganese (0.6mg/L) pollution of raw water.
The effect of different fillers BAF + conventional treatment process on the removal of manganese in raw water and film-forming time vary greatly. Biofilter packing need has larger surface area and strong adsorption, catalytic activity of membrane can easy to produce manganese and improve the treatment effect of manganese. Shale ceramsite can easily achieve the BAF routine treatment the process of biofilter packing requirements.
BAF + conventional treatment process in biofilm, stable operation, removal of manganese process is mainly by contact oxidation, biological manganese removal effect accounts for only a small part of overall process of manganese removal effect, the ratio of about 1/3. The activity of biological filter membrane once mature, is one of the non biological factors on the removal of manganese plays a leading role.
The results show that the Upflow Biological Aerated Filter Using Lightweight ceramsite filter can greatly reduce the head loss, thereby reducing the energy consumption of the process, to maintain good biological filter backwash effect, the effective functioning of the economy to BAF conventional treatment process.

【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU991.2

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