本文關(guān)鍵詞：復(fù)合流人工濕地處理小城鎮(zhèn)生活污水實驗研究　出處：《河南大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 人工濕地 復(fù)合流 生活污水 小城鎮(zhèn)

【摘要】：人工濕地是一種投資省、管理維護(hù)簡單、處理效果好的污水生態(tài)處理技術(shù),被廣泛應(yīng)用于中小城鎮(zhèn)、農(nóng)村地區(qū)的生活污水的處理。本實驗以蘆葦和美人蕉為供試植物構(gòu)建垂直流人工濕地處理單元,將其串聯(lián)后組成2個復(fù)合流人工濕地處理系統(tǒng)。以模擬生活廢水為處理對象,開展了水力停留時間(HRT)、曝氣增氧、多點進(jìn)水等因素對人工濕地系統(tǒng)去除COD、N、P和抗生素的影響研究。主要結(jié)論如下:(1)HRT優(yōu)化實驗中,HRT=3.0d時,美人蕉人工濕地系統(tǒng)和蘆葦人工濕地系統(tǒng)對各類污染物的去除率最高;蘆葦人工濕地系統(tǒng)對COD、TN、NH3-N、TP、PO43-的去除能力高于美人蕉人工濕地系統(tǒng)。隨著HRT的增大,美人蕉人工濕地系統(tǒng)和蘆葦人工濕地系統(tǒng)中COD、TP、PO43-、四環(huán)素、土霉素和金霉素去除率先顯著增大再緩慢增大,最高去除率分別為80.72±1.21%、65.67±5.26%、61.82±2.64%、97.27%、91.18%、83.43%和86.99±1.86%、79.38±5.45%、78.08±3.26%、97.71%、91.46%、86.68%,而TN、NH3-N去除率則隨HRT增大而一直緩慢增大,最高去除率分別為33.60±0.86%、29.13±2.71%和38.27±4.86%、36.68±3.15%。不同HRT下,人工濕地系統(tǒng)對COD、氮素的去除主要依靠前面兩個垂直流濕地單元的降解作用完成的,對磷素的去除則是三個垂直流濕地單元共同作用而完成的,對四環(huán)素、土霉素和金霉素的去除則主要是在第一個垂直流濕地單元中完成,這些四環(huán)素類抗生素大部分是靠基質(zhì)的吸附和吸收作用而被去除的。(2)曝氣增氧實驗中,隨氣水比的增大,美人蕉人工濕地系統(tǒng)和蘆葦人工濕地系統(tǒng)中COD、TN、NH3-N、TP和PO43-去除率均是先迅速增大再緩慢增大,而四環(huán)素、土霉素和金霉素去除率隨氣水比增大,去除率變化不大。蘆葦人工濕地系統(tǒng)對總氮和氨氮的去除率高于美人蕉人工濕地系統(tǒng),而對COD、TP、PO43-、四環(huán)素、土霉素和金霉素去除率則與美人蕉人工濕地系統(tǒng)相差不大。氣水比為15-45時,人工濕地系統(tǒng)對COD、TP和PO43-的去除率變化不大,此時,COD去除率在83-85%之間,TP和PO43-去除率均高于98%。氣水比為15、30和45時,美人蕉人工濕地系統(tǒng)和蘆葦人工濕地系統(tǒng)對TN去除率比不曝氣時分別提高了14.72%、31.58%、66.56%和32.48%、72.69%、73.52%,對NH3-N去除率比不曝氣時分別提高了37.15%、68.69%、78.71%和71.86%、81.54%、84.24%,美人蕉人工濕地系統(tǒng)和蘆葦人工濕地系統(tǒng)對四環(huán)素、土霉素和金霉素的去除率均在75.65%-79.78%、78.83%-80.46%、52.53%-54.69%之間。綜合考慮,曝氣量以氣水比30為宜。(3)多點進(jìn)水能夠稍微提高人工濕地系統(tǒng)中COD、TN、NH3-N、TP和PO43-的去除效率,同時能夠明顯提高四環(huán)素、土霉素和金霉素的去除效率。美人蕉人工濕地系統(tǒng)與蘆葦人工濕地系統(tǒng)去除COD最佳進(jìn)水流量比分別為1:2和2:1,此時去除效率分別為86.38±2.84%和85.97±3.53%。去除TN、NH3-N、TP、PO43-、四環(huán)素、土霉素、金霉素的最佳進(jìn)水流量比均為1:1。進(jìn)水流量比為1:0即一端進(jìn)水時各污染物的去除效率最低,美人蕉人工濕地系統(tǒng)與蘆葦人工濕地系統(tǒng)中COD、TN、NH3-N、TP、PO43-、四環(huán)素、土霉素和金霉素的去除效率分別為82.34±5.06%、47.31±2.44%、86.84±2.38%、94.91±0.59%、96.71±0.08%、77.37%、79.74%、50.50%和82.16±3.20%、91.50±0.18%、96.50±1.42%、94.64±0.32%、98.54±0.32%、82.39%、77.70%和58.98%。
[Abstract]:Artificial wetland is a kind of investment, simple management and maintenance, sewage ecological treatment technology with good effect, is widely used in small towns and rural areas sewage treatment. In this experiment, reed and Canna as tested plants to construct vertical flow artificial wetland treatment unit, the series consists of 2 composite flow artificial wetland treatment system. In order to simulate domestic wastewater as treatment object, carry out the hydraulic retention time (HRT), aeration, the removal of COD, the artificial wetland system multi influent factors such as N, P and the effects of antibiotics. The main conclusions are as follows: (1) HRT optimization experiment, HRT=3.0d, Canna artificial wetland and reed wetland system on various pollutants removal rate; reed wetland system on COD, TN, NH3-N, TP, PO43- removal than Canna artificial wetland system. With the increase of HRT, Canna artificial wet Land system and reed wetland system COD, TP, PO43-, tetracycline, oxytetracycline and chlortetracycline removal rate increased significantly and then increases slowly, the highest removal rates were 80.72 + 1.21%, 65.67 + 5.26%, 61.82 + 2.64%, 97.27%, 91.18%, 83.43% and 86.99 + 1.86%, 79.38 + 5.45%, 78.08 + 3.26%, 97.71%. 91.46%, 86.68%, and TN, the removal rate of NH3-N is increased with increasing HRT and has been slow, the highest removal rates were 33.60 + 0.86%, 29.13 + 2.71% and 38.27 + 4.86%, 36.68 + 3.15%. under different HRT artificial wetland system on COD, nitrogen removal mainly by degradation on the front of the two vertical flow wetland unit completed, the phosphorus removal is three vertical flow wetland unit work together to complete, removal of tetracycline, oxytetracycline and chlortetracycline are mainly completed in the first vertical flow wetland unit, the tetracycline antibiotics mostly rely on matrix Is the removal of adsorption and absorption. (2) aeration experiment, with the increase of the ratio of gas and water, Canna artificial wetland system and reed wetland system COD, TN, NH3-N, TP and PO43- removal rate was first increased rapidly and then slowly increased, and the removal rate of tetracycline, oxytetracycline and chlortetracycline with the increase of the ratio of gas and water, the removal rate is not changed. The reed wetland system on total nitrogen and ammonia nitrogen removal rate is higher than the Canna artificial wetland system, while the COD, TP, PO43-, tetracycline, oxytetracycline and chlortetracycline removal rate and Canna artificial wetland system had little difference. When the gas water ratio is 15-45, artificial wetland the system of COD, the removal rate of TP and PO43- changed little, at this time, the removal rate of COD between 83-85%, TP and PO43- removal rate was higher than that of 98%. gas water ratio is 15,30 and 45, Canna artificial wetland and reed wetland system on the removal rate of TN than non aeration Were increased by 14.72%, 31.58%, 66.56% and 32.48%, 72.69%, 73.52%, the removal rate of NH3-N than the aeration were increased by 37.15%, 68.69%, 78.71% and 71.86%, 81.54%, 84.24%, Canna artificial wetland and reed wetland system on the removal of tetracycline, oxytetracycline and chlortetracycline were in 75.65%-79.78%, 78.83%-80.46%, 52.53%-54.69%. Considering the amount of aeration in gas water ratio should be 30. (3) multi inlet can slightly improve the artificial wetland system in COD, TN, NH3-N, TP and PO43- removal efficiency, and can significantly improve the removal efficiency of four tetracycline, oxytetracycline and chlortetracycline. Canna artificial wetland system reed wetland system for removal of COD optimal water flow ratio were 1:2 and 2:1, the removal efficiency were 86.38 + 2.84% and 85.97 + 3.53%. NH3-N, removal of TN, TP, PO43-, tetracycline, terramycin aureomycin, optimal water flow ratio 1:1. water flow ratio of 1:0 is the end of the water pollutant removal efficiency is lowest, Canna artificial wetland system and reed wetland system COD, TN, NH3-N, TP, PO43-, tetracycline, oxytetracycline and chlortetracycline removal efficiency were 82.34 + 5.06%, 47.31 + 2.44%, 86.84 + 2.38%, 94.91 + 0.59% 96.71, + 0.08%, 77.37%, 79.74%, 50.50% and 82.16 + 3.20%, 91.50 + 0.18%, 96.50 + 1.42%, 94.64 + 0.32%, 98.54 + 0.32%, 82.39%, 77.70% and 58.98%.

【學(xué)位授予單位】：河南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：X799.3

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