發(fā)布時(shí)間：2018-02-24 18:13

  本文關(guān)鍵詞： 垃圾滲濾液 層次分析法 MBR RO DTRO　出處：《長(zhǎng)安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國(guó)經(jīng)濟(jì)的不斷發(fā)展和人們生活質(zhì)量的持續(xù)提高,城市生活垃圾不斷積累,垃圾年累計(jì)堆量達(dá)60多億噸,已嚴(yán)重影響了人們的生存環(huán)境,并在垃圾填埋場(chǎng)過程中導(dǎo)致滲濾液的產(chǎn)生。垃圾滲濾液是一種高濃度、難處理的有機(jī)廢水,它不僅成分復(fù)雜,微生物營(yíng)養(yǎng)元素比例嚴(yán)重失調(diào),水質(zhì)水量變化大,而且其具有很強(qiáng)的有毒有害性,這些特點(diǎn)使得滲濾液的處理是一個(gè)世界性的問題。因此根據(jù)滲濾液的特性,并針對(duì)特定的水質(zhì)特點(diǎn)探討其最優(yōu)的處理方案是加快滲濾液領(lǐng)域處理效果的捷徑,具有重要的研究意義。針對(duì)本次研究對(duì)象-某市垃圾滲濾液處理廠,本文對(duì)滲濾液的形成機(jī)理和來源進(jìn)行了闡述,并在此基礎(chǔ)上對(duì)滲濾液的特性和水質(zhì)評(píng)價(jià)進(jìn)行了深入研究,探究了影響滲濾液成分和性質(zhì)的因素,并對(duì)國(guó)內(nèi)外滲濾液的研究現(xiàn)狀進(jìn)行了分析,介紹了滲濾液的生物、物化和自然生態(tài)處理方法。根據(jù)國(guó)內(nèi)外對(duì)滲濾液預(yù)測(cè)方法的研究結(jié)果,本文基于損益原理與水量平衡原理列舉了三種用于滲濾液預(yù)測(cè)的方法:水量平衡法、經(jīng)驗(yàn)統(tǒng)計(jì)法和經(jīng)驗(yàn)公式法,工程上建議采用年平均日降水量法并參考經(jīng)驗(yàn)統(tǒng)計(jì)法來進(jìn)行滲濾液產(chǎn)量的預(yù)測(cè),并應(yīng)用此法對(duì)本次研究對(duì)象—某市垃圾滲濾液處理廠的產(chǎn)量進(jìn)行了預(yù)測(cè),得出產(chǎn)量為Q=74 m3/d,滲濾液設(shè)計(jì)產(chǎn)量按Q=80m3/d考慮。介紹了層次分析法的基本原理以及基本步驟,并詳細(xì)介紹了其在滲濾液處理廠中的應(yīng)用,為后文滲濾液方案的比選提供了理論依據(jù)�；谀呈欣鴿B濾液的水質(zhì)特點(diǎn),傳統(tǒng)的簡(jiǎn)單物化與生物組合工藝對(duì)滲濾液的處理效果很難達(dá)到排放標(biāo)準(zhǔn),且國(guó)內(nèi)外已有多個(gè)利用膜處理組合技術(shù)的滲濾液處理廠,出水水質(zhì)達(dá)到了排放標(biāo)準(zhǔn),由國(guó)內(nèi)外滲濾液的實(shí)際工程案例和研究經(jīng)驗(yàn),提出了兩種備選方案:A2/O-MBR+RO和兩級(jí)A/O-MBR+DTRO。通過對(duì)所提到的11個(gè)準(zhǔn)則因素和2個(gè)給定方案的分析,運(yùn)用層次分析法對(duì)兩種備選方案進(jìn)行經(jīng)濟(jì)技術(shù)方面的比選,并綜合考慮其在滲濾液水質(zhì)適用方面和工藝技術(shù)可行性方面的對(duì)比結(jié)果,得出優(yōu)選方案:兩級(jí)A/O-MBR+DTRO�；邳S開堅(jiān)對(duì)垃圾滲濾液的中試實(shí)驗(yàn)研究,并進(jìn)行了兩級(jí)A/O-MBR對(duì)COD、NH3-N和BOD5分級(jí)去除效果的對(duì)比分析,最終確定本次兩級(jí)A/O池有機(jī)物去除率分配為:一級(jí)A/O:COD為82%,BOD為95%,NH3-N為94%;二級(jí)A/O:COD為50%,BOD為75%,NH3-N為76%。通過對(duì)硝化細(xì)菌的生存溫度的研究,并結(jié)合工程所在地水溫氣候因素,本次滲濾液設(shè)計(jì)溫度為20℃。最后在考慮節(jié)耗的基礎(chǔ)上,充分考慮工程實(shí)施的合理性、經(jīng)濟(jì)性、可行性,對(duì)兩級(jí)A/O-MBR+DTRO工藝進(jìn)行了調(diào)節(jié)池、兩級(jí)A/O-MBR生化池、超濾系統(tǒng)、DTRO系統(tǒng)參數(shù)的確定。
[Abstract]:With the continuous development of our economy and the continuous improvement of people's quality of life, urban domestic waste is accumulated continuously, and the annual accumulative amount of garbage reaches more than 6 billion tons, which has seriously affected the living environment of people. The landfill leachate is a kind of organic wastewater with high concentration and difficult to be treated. It not only has complex composition, but also has a serious imbalance of microbial nutrient elements, and the quantity of water and water changes greatly. And it is very toxic and harmful, and these characteristics make the treatment of leachate a worldwide problem. Therefore, according to the characteristics of leachate, According to the specific water quality characteristics, it is of great significance to explore the optimal treatment scheme for leachate treatment, which is a shortcut to accelerate the treatment effect in leachate field, and it is of great significance to study the target of this study, a municipal landfill leachate treatment plant, and a municipal landfill leachate treatment plant. In this paper, the formation mechanism and source of leachate are expounded. On the basis of this, the characteristics and water quality evaluation of leachate are deeply studied, and the factors influencing the composition and properties of leachate are explored. The present situation of leachate research at home and abroad was analyzed, and the biological, physicochemical and natural ecological treatment methods of leachate were introduced. Based on the principle of profit and loss and the principle of water balance, this paper lists three methods for predicting leachate: water balance method, empirical statistics method and empirical formula method. It is suggested that the annual average daily precipitation method should be used to predict the leachate output with reference to empirical statistics. The output of a municipal landfill leachate treatment plant is forecasted by this method. The output of leachate is 74 m3 / d, and the design output of leachate is considered in terms of QN 80m3 / d. The basic principle and steps of AHP are introduced, and its application in leachate treatment plant is introduced in detail. Based on the water quality characteristics of landfill leachate in a certain city, it is difficult to meet the discharge standard of the treatment effect of traditional simple physicochemical and biological combination process for leachate treatment. There are many leachate treatment plants using membrane treatment combination technology at home and abroad, and the effluent quality has reached the discharge standard. The actual engineering cases and research experience of leachate at home and abroad are discussed. In this paper, we put forward two options: A2 / O-MBR RO and two levels of Ar / O-MBR DTRO.Through analyzing the 11 criterion factors mentioned and the two given schemes, we use AHP to compare the economic and technical aspects of the two options. Considering the results of comparison in the application of leachate quality and the feasibility of process technology, the optimal selection scheme is obtained: two stage A / O MBR DTRO.Based on Huang Kaijian, the pilot experiment of landfill leachate is carried out. A comparative analysis was made on the removal efficiency of COD NH 3-N and BOD5 by two stages of A / O MBR. Finally, it was determined that the removal rate of organic matter in the two stages of A / O pool was as follows: a / O: COD = 82% bod = 95% NH _ 3-N = 944.The second stage A / O _ (BOD5) COD = 50 bod = 75 ~ (NH _ 3-N) was 76. Through the study on the survival temperature of nitrifying bacteria, The leachate design temperature is 20 鈩，

本文編號(hào)：1531219