本文選題：污水廠尾水 + 固體緩釋碳源　； 參考：《南京林業(yè)大學(xué)》2015年碩士論文

【摘要】：本課題以城市污水處理廠尾水為研究對(duì)象,從麥稈、蘆葦桿、玉米芯三種農(nóng)業(yè)廢棄物中篩選出一種作為反硝化外加固體碳源,以吸附性材料竹炭作為反硝化生物濾池的填料,針對(duì)低C/N的城市污水處理廠尾水進(jìn)行脫氮處理試驗(yàn)研究,并研究了玉米芯的反硝化特性。試驗(yàn)結(jié)果表明:(1)麥稈、蘆葦桿、玉米芯三種材料靜態(tài)釋放COD的規(guī)律符合雙倒數(shù)關(guān)系方程,擬合方程分別為1/c=0.0207/t+0.0239,1/c=0.3498/t+0.1435,1/c=0.0595/t+0.0129。分析得出玉米芯釋放COD飽和值大,釋碳潛力大,傳質(zhì)阻力大,釋碳緩慢,是一種良好的緩釋碳源材料。(2)采用“按設(shè)計(jì)流速連續(xù)流培養(yǎng)方式”對(duì)竹炭反硝化濾池進(jìn)行掛膜是可行的。掛膜結(jié)果顯示:C/N(COD/NO3--N)=4~5、HRT=2h、室溫保持在20℃左右,經(jīng)過(guò)13天生物膜即可成熟,NO3--N平均去除率在80%以上。(3)以模擬城市污水處理廠尾水作為進(jìn)水,將玉米芯柱與竹炭柱串聯(lián)作為反應(yīng)器,研究不同水力停留時(shí)間、COD進(jìn)水負(fù)荷、NO3--N進(jìn)水負(fù)荷等工況條件下,反應(yīng)器對(duì)尾水的處理效果。在進(jìn)水COD 20~60mg/L,進(jìn)水NO3--N 15~30mg/L,水力停留時(shí)間1~4h下,反應(yīng)器出水低于一級(jí)A標(biāo)準(zhǔn)總氮濃度限值,反應(yīng)器穩(wěn)定后總氮容積負(fù)荷最大為0.585kg/(m3?d)。(4)對(duì)反應(yīng)器運(yùn)行期間的COD與NO3--N進(jìn)行衡算,得到去除1gNO3--N需玉米芯4.77g,釋放1gCOD需玉米芯質(zhì)量為2.01g。用電子掃描顯微鏡觀察反應(yīng)器中的玉米芯和竹炭,其上生物膜生長(zhǎng)緊密,玉米芯的生物膜中觀察到的菌以球菌短桿菌為主,竹炭的生物膜中觀察到絲狀菌、球菌、短桿菌。推測(cè)觀察到的球菌和短桿菌為反硝化菌中的微球菌屬、假單胞菌屬和色桿菌屬。(5)微生物和NO3--N對(duì)玉米芯總有機(jī)碳TOC的釋放速率有影響,玉米芯釋放有機(jī)物受到水中NO3--N的響應(yīng)控制。玉米芯反硝化的最佳溫度為30℃,最佳pH為7.8,最大反硝化速率為5.80 mgNO3--N/(gSS?h)。
[Abstract]:Taking the tail water of the municipal wastewater treatment plant as the research object, a kind of denitrification and solid carbon source was selected from three kinds of agricultural waste of wheat straw, reed rod and corncob. The adsorptive material bamboo charcoal was used as the filler of the denitrifying biological filter. The experimental study on the removal of nitrogen in the tail water of the low C/N municipal wastewater treatment plant was studied and studied. The denitrification characteristics of the corn cored were investigated. The results showed that: (1) the law of static release of COD from three kinds of material of wheat straw, reed rod and corn core conforms to the equation of double reciprocal relation. The fitting equation is 1/c=0.0207/t+0.0239,1/c=0.3498/t+0.1435,1/c=0.0595/t+0.0129. analysis, respectively, that the saturation value of COD release in the jade core is large, the carbon release potential is large and the mass transfer resistance is high. It is a good carbon source material for slow release of carbon. (2) it is feasible to use the "continuous flow culture method according to design flow" for bamboo charcoal denitrification filter. The results show that C/N (COD/NO3--N) =4~5, HRT=2h, room temperature remains around 20, after 13 days of biofilm, the average removal rate of NO3--N is above 80%. (3) Taking the tail water of the municipal sewage treatment plant as the influent, the corn core column and the bamboo charcoal column are connected in series as the reactor. The treatment effect of the reactor on the tail water is studied under the conditions of different hydraulic retention time, COD influent load and NO3--N loading load. The reactor is under the influent COD 20~60mg/L, the water intake NO3--N 15~30mg/L, the hydraulic retention time 1~4h, and the reactor. The effluent is lower than the standard A standard total nitrogen concentration, and the maximum total nitrogen volume load is 0.585kg/ (M3? D) after the reactor is stable. (4) to check the COD and NO3--N during the operation of the reactor, the 1gNO3--N need to remove the corn core 4.77g, and the 1gCOD core quality is released for 2.01g. using the electron scanning microscope to observe the corn core and bamboo charcoal in the reactor. The biofilm on the biofilm was closely grown, and the bacteria observed in the biofilm were mainly short bacilli, and filamentous bacteria, cocci, and bacilli were observed in the biofilm of bamboo charcoal. The observed micrococcus and Bacillus brevis were Micrococcus, Pseudomonas and coloured fungus in the denitrifying bacteria. (5) microorganism and NO3--N to the total organic carbon TOC of corn cob The release rate of the corn core is controlled by the response of NO3--N in the water. The best temperature of the denitrification is 30, the best pH is 7.8, the maximum denitrification rate is 5.80 mgNO3--N/ (gSS? H).
【學(xué)位授予單位】：南京林業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703

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