本文選題：腈綸廢水 + 生物脫氮��； 參考：《蘭州交通大學(xué)》2015年碩士論文

【摘要】：腈綸廢水是在高分子材料生產(chǎn)廢水、有毒廢水及高氨氮廢水處理中具有典型性的高濃度難降解有機(jī)廢水,具有有機(jī)污染物濃度高、聚合物粉末和低聚物難生物降解、水質(zhì)成分復(fù)雜且波動(dòng)大、含有毒性很大氰化物、廢水中的含氮物質(zhì)在處理過程中會(huì)分解產(chǎn)生高濃度氨氮等特點(diǎn),如何高效降解腈綸廢水中的有機(jī)物和氨氮并使其達(dá)標(biāo)排放已成為環(huán)保學(xué)者注重的難題,故研究腈綸廢水生物脫氮影響因素、提高脫氮效率具有十分重要的現(xiàn)實(shí)意義。本論文研究對(duì)象為吉林化纖集團(tuán)生產(chǎn)的腈綸廢水,結(jié)合微生物固定化作用,采用SBBR處理工藝,通過小試實(shí)驗(yàn)分別考察HRT、DO、溫度、堿度、磷濃度、C/N值、運(yùn)行方式以及進(jìn)水COD負(fù)荷等因素對(duì)生物脫氮的影響,得出不同運(yùn)行條件對(duì)出水水質(zhì)的影響以及生化系統(tǒng)中有機(jī)物和氮化合物的降解規(guī)律,確定出處理腈綸廢水的最佳運(yùn)行工況,并結(jié)合廠內(nèi)實(shí)際運(yùn)行情況,對(duì)腈綸廢水與黏膠廢水的混合廢水處理進(jìn)行研究,揭示了廢水耦合處理在充分利用碳源方面的處理優(yōu)勢(shì),為實(shí)際廢水的綜合處理提供了技術(shù)參考。研究主要得出以下結(jié)論:(1)腈綸廢水生物脫氮影響因素研究小試實(shí)驗(yàn)中,通過SBBR反應(yīng)器,采用靜態(tài)單因素影響實(shí)驗(yàn)得出:在HRT為48h,DO為2-4mg/L,投加磷溶液2mg/L,加碳酸氫鈉0.4g/L,溫度25℃的最佳條件下,進(jìn)水COD和氨氮濃度分別為625~1232 mg/L和85~140mg/L的范圍內(nèi),出水濃度分別為280mg/L和5mg/L以下,硝酸鹽氮濃度52.41mg/L,亞硝酸鹽氮0.14 mg/L,總氮89.49 mg/L,BOD可降為0。(2)腈綸廢水生物脫氮機(jī)理研究實(shí)驗(yàn)中,通過測(cè)定分析各指標(biāo)周期降解曲線得出:①在HRT為48h的一個(gè)周期內(nèi),大部分有機(jī)物在3h內(nèi)即可被吸附降解,期間氨化過程會(huì)產(chǎn)生部分氨氮,30h左右有機(jī)物達(dá)到降解平衡濃度,待大部分COD基本降解完成后(6h左右)硝化反應(yīng)迅速,氨氮開始降解,30h左右基本降解完成;在此過程中,亞硝酸鹽氮積累,后隨著亞硝化作用的進(jìn)行而迅速降解,硝化與亞硝化過程中,硝酸鹽氮濃度持續(xù)上升,30h后反硝化作用明顯,硝酸鹽氮與總氮進(jìn)一步降解,一周期內(nèi)生物降解完成。HRT增大到72h后,系統(tǒng)脫氮效果變差。②HRT48h條件下,DO=2-4mg/L,投加磷溶液2mg/L,加碳酸氫鈉0.4g/L,溫度25℃的條件下,反應(yīng)器內(nèi)溶解氧濃度、營(yíng)養(yǎng)物質(zhì)以及堿度和溫度均能保證系統(tǒng)發(fā)生較好的同步硝化與反硝化現(xiàn)象。③HRT48h試驗(yàn)條件下COD降解過程服從一級(jí)反應(yīng)動(dòng)力學(xué)關(guān)系式,通過計(jì)算求得,當(dāng)進(jìn)水COD濃度為696.4mg/L,HRT為48h的條件下,腈綸廢水難降解有機(jī)物濃度為245mg/L。(3)腈綸廢水進(jìn)水濃度研究中,通過比較不同稀釋比例的腈綸廢水出水效果得出,當(dāng)進(jìn)水COD負(fù)荷為400~500mg/時(shí),COD吸附量達(dá)到極限,且該濃度范圍下具有較好的硝化、脫氮效果,出水COD去除率57.2%,氨氮去除率95.83%,總氮去除率9.4%,BOD可降為0。(4)腈綸廢水與黏膠廢水耦合實(shí)驗(yàn)中,通過對(duì)比混合廢水在不同條件下的出水效果得出:耦合處理兩種廢水要比單獨(dú)處理效果好,當(dāng)耦合比例為1:2時(shí),各指標(biāo)單位去除量最大,該條件下出水COD濃度為171mg/L,氨氮濃度為2.4mg/L。結(jié)合工程實(shí)際,在二者混合比為1:3的情況下,反應(yīng)器在HRT 48h好氧、HRT 24h好氧或HRT 48h(A24h/O24h)三種運(yùn)行方式下均能使耦合出水COD60 mg/L,氨氮10 mg/L。
[Abstract]:Acrylic wastewater is a typical high concentration and refractory organic wastewater in the treatment of high polymer wastewater, toxic waste water and high ammonia nitrogen waste water. It has high concentration of organic pollutants, polymer powder and oligomer difficult to biodegrade. The composition of water quality is complex and volatile, which contains toxic cyanide, and the nitrogen containing substance in the wastewater is in the place. It will decompose the high concentration of ammonia and nitrogen in the process. How to efficiently degrade the organic matter and ammonia nitrogen in the acrylic wastewater and make it discharge the standard has become a difficult problem for the environmental protection scholars. Therefore, it is of great practical significance to study the influence factors of biological denitrification in acrylic wastewater and improve the efficiency of denitrification. The object of this paper is Jilin chemical fiber. The acrylic fiber wastewater produced by the group is combined with microorganism immobilization, and the SBBR treatment process is used. The effects of HRT, DO, temperature, alkalinity, phosphorus concentration, C/N value, operation mode and COD load on the biological denitrification are investigated by small test experiments. The effects of different operating conditions on the effluent quality and the organic matter in the biochemical system and the organic matter in the biochemical system are obtained. The degradation law of nitrogen compounds, the optimum operating conditions for the treatment of acrylic fiber wastewater, and the research on the treatment of mixed wastewater from the acrylic fiber wastewater and viscose wastewater combined with the actual operating conditions in the plant were studied. The advantages of the treatment of the wastewater coupled treatment in the full utilization of carbon source were revealed, and the technical reference for the comprehensive treatment of the wastewater was provided. The main conclusions are as follows: (1) in the study of the influence factors of biological denitrification in acrylic wastewater, through the SBBR reactor, the static single factor influence experiments have been carried out. The results are as follows: HRT is 48h, DO is 2-4mg/L, phosphorus solution 2mg/L, sodium bicarbonate 0.4g/L, temperature 25 C, and the concentration of COD and NH3 is 625~1232 mg/L, respectively. In the range of 85~140mg/L and 85~140mg/L, the effluent concentration is below 280mg/L and 5mg/L, nitrate nitrogen concentration is 52.41mg/L, nitrite nitrogen is 0.14 mg/L, total nitrogen is 89.49 mg/L, BOD can be reduced to 0. (2) biological denitrification mechanism of acrylic wastewater. Through determination and analysis of the cycle reduction curve of each index: (1) in a period of HRT as 48H Organic matter can be adsorbed and degraded in 3H. During the ammonification process, a partial ammonia nitrogen is produced and the organic matter of about 30h reaches the equilibrium concentration. After most of the basic degradation of COD (about 6h), the nitrification reaction is rapid, the ammonia nitrogen begins to degrade, and the basic degradation is done around 30h; in this process, nitrite nitrogen accumulates and then nitrification. In the process of rapid degradation, the concentration of nitrate nitrogen continued to rise in the process of nitrification and nitrosation. After 30h, the denitrification was obvious, the nitrate nitrogen and total nitrogen were further degraded. The nitrogen removal efficiency of the system was worse when the biodegradation was increased to 72h in a period of time. (2) HRT48h, DO=2-4mg/L, 2mg/L, 0.4g/L, and temperature of sodium bicarbonate. Under the condition of 25 degrees C, the concentration of dissolved oxygen in the reactor, the nutrients and the alkalinity and temperature can ensure the better synchronous nitrification and denitrification. (3) under the HRT48h test, the COD degradation process obeys the first order reaction kinetic formula and obtained by calculation, when the concentration of COD is 696.4mg/L and HRT is 48h, the nitrile can be obtained. In the study of 245mg/L. (3) acrylic wastewater influent concentration in the wastewater, the effect of different dilution ratio on the effluent of acrylic wastewater was compared. When the load of COD was 400~500mg/, the COD adsorption capacity reached the limit, and the effect of nitrification, denitrification, the removal rate of COD and the removal of ammonia nitrogen were better under the concentration range. The ratio of the total nitrogen removal rate is 95.83%, and the total nitrogen removal rate is 9.4%. BOD can be reduced to 0. (4) in the coupling experiment of acrylic wastewater and viscose wastewater. By comparing the effluent effect of mixed wastewater under different conditions, it is found that the coupling treatment of two kinds of wastewater is better than that of the separate treatment. When the coupling ratio is 1:2, the removal of each index unit is the largest, and the COD concentration of the effluent is 171mg/L under this condition. When the concentration of ammonia nitrogen is 2.4mg/L. binding engineering, in the case of two mixing ratio of 1:3, the reactor can make the coupling effluent COD60 mg/L, ammonia nitrogen 10 mg/L. under the three operating modes of HRT 48h aerobic, HRT 24h aerobic or HRT 48h (A24h/O24h).
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X783.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 牛蒙珍;王麗艷;;干法腈綸纖維的特點(diǎn)及其應(yīng)用[J];棉紡織技術(shù);2008年03期

相關(guān)碩士學(xué)位論文 前1條

1 魏武強(qiáng);基于“SBR+人工濕地”組合工藝的生活污水回用技術(shù)試驗(yàn)研究[D];重慶大學(xué);2008年

，

本文編號(hào)：1954822