本文選題：人工快速滲濾系統(tǒng) + 前置反硝化　； 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：人工快速滲濾系統(tǒng)(Constructed Rapid Infi1tration system, CRI)由于其低成本、低耗能、易操作以及出水水質(zhì)好等優(yōu)點(diǎn)近年來得到廣泛研究和應(yīng)用。相關(guān)研究表明,由于反硝化反應(yīng)所需的缺氧環(huán)境及有機(jī)碳源的缺乏,該系統(tǒng)的脫氮效率較低,因此,強(qiáng)化人工快滲滲濾系統(tǒng)的脫氮能力成為目前的研究重點(diǎn)。本課題采用實(shí)驗(yàn)室構(gòu)建A/O兩段式人工快速滲濾系統(tǒng),充分借鑒了活性污泥法中A/O工藝脫氮原理的設(shè)計(jì)思路,將傳統(tǒng)CRI系統(tǒng)改進(jìn)為前置反硝化CRI系統(tǒng),研究了前置反硝化CRI系統(tǒng)對(duì)生活污水的處理性能,探討了該系統(tǒng)有機(jī)物和總氮的去除機(jī)理,尋求該系統(tǒng)的最佳回流比條件。同時(shí)利用硝態(tài)氮在水中具有較大的溶解度對(duì)前置反硝化人工快速滲濾系統(tǒng)進(jìn)行了改進(jìn),研究了改進(jìn)型前置反硝化人工快速滲濾系統(tǒng)對(duì)生活污水的處理性能及其有機(jī)物和TN的去除機(jī)理,探討了回流量不變的情況下,不同回流比條件對(duì)改進(jìn)型前置反硝化人工快速滲濾系統(tǒng)脫氮效率的影響。最后,探討了改進(jìn)型前置反硝化人工快速滲濾系統(tǒng)的A段人工快速滲濾系統(tǒng)對(duì)硝態(tài)氮的去除動(dòng)力學(xué),構(gòu)建A段人工快速滲濾系統(tǒng)去除硝態(tài)氮的動(dòng)力學(xué)模型。A/O兩段式前置反硝化人工快速滲濾系統(tǒng)的啟動(dòng)試驗(yàn)中,系統(tǒng)采用階段式自然掛膜方式,A段系統(tǒng)對(duì)TN的去除率穩(wěn)定在35%左右,O段系統(tǒng)對(duì)氨氮的去除率穩(wěn)定在70%左右說明掛膜成功,整個(gè)過程總共歷時(shí)34d。掛膜成功后,繼續(xù)運(yùn)行A/O兩段式前置反硝化人工快速滲濾系統(tǒng),在水力負(fù)荷80(cm3/cm2·d),回流比為100%條件下,系統(tǒng)對(duì)COD、NH4+-N的效果較好,平均去除率分別為90.2%,79.9%。而對(duì)TN的去除率提高到40.8%。因?yàn)榉聪趸迷瓘U水中的有機(jī)物作為碳源將回流液中的NO3--N還原為N2,從而降低了出水的TN濃度�；亓鞅葘�(duì)NH4+-N和COD的去除影響較小,而對(duì)TN的的去除影響相對(duì)較大。隨著回流比從50%增加到200%,TN的去除率先由31.4%上升到40.1%再下降為33.8%。通過改進(jìn)運(yùn)行方式,利用NO3-N在水中具有較大的溶解性,通過前面流入O段系統(tǒng)的污水將其中的N03-N淋洗出來進(jìn)入回流,同時(shí)在O段系統(tǒng)配水2h后再將消化回流液通入O段系統(tǒng)內(nèi)加強(qiáng)O段系統(tǒng)復(fù)氧的方式加強(qiáng)A/O兩段式前置反硝化人工快速滲濾系統(tǒng)的脫氮性能。試驗(yàn)表明:改進(jìn)后的系統(tǒng)由于污水對(duì)N03-N的淋洗作用,將O段系統(tǒng)轉(zhuǎn)化的大部分NO3--N回流回A段系統(tǒng)進(jìn)行反硝化將系統(tǒng)的TN去除率提高到了 78%�；亓鞅葘�(duì)于改進(jìn)型A/O兩段式前置反硝化人工快速滲濾系統(tǒng)對(duì)COD和NH4+-N的去除影響很小,對(duì)TN有較大的影響。試驗(yàn)表明:TN去除效果在水力負(fù)荷為80cm3/(cm2·d)、回流比為75%時(shí)最好,去除率為 77.4%。推導(dǎo)出A段系統(tǒng)反硝化一級(jí)動(dòng)力學(xué)模型:(S_e)/(S_0)=e~((-3.4301H)/(q~(2.2354))),經(jīng)驗(yàn)證,該模型可以較好的反應(yīng)A段系統(tǒng)對(duì)NO3-N的降解規(guī)律。
[Abstract]:Artificial rapid leachate system (CRI) has been widely studied and applied in recent years because of its advantages of low cost, low energy consumption, easy operation and good effluent quality. The related studies show that the denitrification efficiency of the system is low due to the lack of oxygen environment and organic carbon source for denitrification reaction. Therefore, strengthening the denitrification capacity of the artificial rapid infiltration system has become the focus of current research. In this paper, an A / O two-stage artificial rapid leachate system was constructed in laboratory. The principle of denitrification in the activated sludge process was fully used for reference, and the traditional CRI system was improved to pre-denitrification CRI system. The performance of pre-denitrification CRI system in treating domestic sewage was studied. The removal mechanism of organic matter and total nitrogen in the system was discussed, and the optimum reflux ratio was found out. At the same time, the prenitrification artificial rapid leachate system was improved by using nitrate nitrogen with high solubility in water. The treatment performance and removal mechanism of organic matter and TN of domestic sewage by improved pre-denitrification artificial rapid leachate system were studied, and the condition of constant reflux was discussed. Effect of different reflux ratio on denitrification efficiency of improved pre-nitrification artificial rapid infiltration system. Finally, the kinetics of nitrate-nitrogen removal by A section artificial rapid leachate system of modified pre-denitrification artificial rapid infiltration system is discussed. A kinetic model of nitrate-nitrogen removal by A stage artificial rapid infiltration system was constructed. The start-up test of A / O two-stage pre-denitrification artificial rapid infiltration system was carried out. In this system, the removal rate of TN by stage A system is about 35% or so, and the removal rate of ammonia nitrogen is about 70%, which indicates that the membrane is successful, and the whole process lasts for 34 days. After the membrane was successfully suspended, the A / O two-stage pre-nitrification artificial rapid infiltration system continued to be run. Under the hydraulic loading of 80(cm3/cm2 _ (d1) and the reflux ratio of 100%, the system had a better effect on COD _ (+) NH _ 4-N, with an average removal rate of 90.2% and 79.9%, respectively. The removal rate of TN was increased to 40.8%. Because denitrifying bacteria used organic matter in the original wastewater as carbon source, the NO3--N in the reflux solution was reduced to N _ 2, thus reducing the TN concentration of effluent. The effect of reflux ratio on the removal of NH4-N and COD is relatively small, while the removal of TN is relatively large. With the increase of the ratio of reflux from 50% to 200%, the removal of TN increased from 31.4% to 40.1%, and then decreased to 33.8. By improving the operation mode, using the NO3-N has greater solubility in the water, the N03-N is eluted into the reflux through the sewage flowing into the O stage system in the front. At the same time, the reoxygenation of O stage system was strengthened by feeding the digested reflux into O stage system for 2 h after the O stage system was distributed, and the denitrification performance of A / O two-stage pre nitrification artificial rapid infiltration system was enhanced. The experimental results show that because of the leaching effect of wastewater on N03-N, the TN removal rate of the improved system is increased to 78% by returning most of the NO3--N reflux from the O stage system to the A stage system for denitrification. The reflux ratio has little effect on the removal of COD and NH4-N, but has a great effect on TN. The experimental results show that the removal efficiency of 1: TN is the best when the hydraulic load is 80cm3/(cm2 DU, the reflux ratio is 75 and the removal rate is 77.4%. The first-order kinetic model of denitrification in stage A system was derived. The model was proved to be effective in the degradation of NO3-N in stage A system.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X799.3

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王冠;方戰(zhàn)強(qiáng);;農(nóng)村飲用水中微污染物的去除技術(shù)研究進(jìn)展[J];廣東化工;2017年04期

2 丁玉洋;;我國(guó)農(nóng)村水污染現(xiàn)狀及防治措施[J];山西青年;2017年02期

3 呂睿;;淺談我國(guó)水資源保護(hù)[J];黑河學(xué)刊;2017年01期

4 黃闊;;農(nóng)村分散式污水處理模式系統(tǒng)及應(yīng)用研究[J];科技展望;2015年19期

5 梁巨大;楊耀宗;曹長(zhǎng)春;;人工快速滲濾系統(tǒng)處理糖蜜酒精廢水研究[J];水科學(xué)與工程技術(shù);2014年06期

6 侯云霞;張建強(qiáng);許文來;羅軍;;人工快速滲濾系統(tǒng)除磷效率研究[J];環(huán)境污染與防治;2014年05期

7 康愛彬;宗慧敏;霍鵬;陳鴻漢;;分段進(jìn)水三級(jí)串聯(lián)人工快速滲濾系統(tǒng)處理高氨態(tài)氮生活污水[J];江蘇農(nóng)業(yè)科學(xué);2014年01期

8 王楓;駱靈喜;劉歡;李旭寧;趙振業(yè);楊小毛;;人工快速滲濾系統(tǒng)中亞硝酸細(xì)菌的篩選及轉(zhuǎn)化能力研究[J];環(huán)境污染與防治;2013年12期

9 王楓;駱靈喜;劉歡;李旭寧;盧利兵;楊小毛;;人工快速滲濾系統(tǒng)中人工快滲池對(duì)污染物的去除效果研究[J];環(huán)境污染與防治;2013年05期

10 張巍;;生態(tài)穩(wěn)定塘系統(tǒng)處理農(nóng)村及小城鎮(zhèn)生活污水的現(xiàn)狀及前景[J];江蘇農(nóng)業(yè)科學(xué);2013年02期

相關(guān)會(huì)議論文 前1條

1 楊小毛;梅立永;賴梅東;劉歡;李旭寧;;人工快滲污水處理技術(shù)在我國(guó)西北地區(qū)的應(yīng)用研究[A];2011中國(guó)環(huán)境科學(xué)學(xué)會(huì)學(xué)術(shù)年會(huì)論文集（第一卷）[C];2011年

相關(guān)博士學(xué)位論文 前2條

1 崔育倩;農(nóng)村分散式污水處理模式系統(tǒng)及應(yīng)用研究[D];青島大學(xué);2013年

2 王春燕;人工土層快滲系統(tǒng)除污性能及氮去除機(jī)理研究[D];重慶大學(xué);2009年

相關(guān)碩士學(xué)位論文 前7條

1 李彥e，

本文編號(hào)：1897059