本文關(guān)鍵詞：生物電化學(xué)強(qiáng)化對(duì)印染廢水厭氧生物處理的影響研究　出處：《武漢紡織大學(xué)》2016年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 活性艷紅X-3B EGSB反應(yīng)器 納米零價(jià)鐵 生物電化學(xué) 脫色

【摘要】：印染廢水含有多種難降解有機(jī)污染物,是具有高化學(xué)需氧量(COD)、高色度、“三致”毒性的難降解有機(jī)廢水。印染廢水大量流入我國(guó)水體環(huán)境,已經(jīng)成為威脅我國(guó)水環(huán)境安全的重要因素之一。生物處理法是實(shí)現(xiàn)染料廢水處理的有效技術(shù)之一。膨脹顆粒污泥床(EGSB)是目前很有發(fā)展前景的一種“高速”厭氧生物反應(yīng)器。納米零價(jià)鐵(nZVI)不僅可高效還原轉(zhuǎn)化污染物,其腐蝕產(chǎn)H2過(guò)程還可作為厭氧微生物電子供體,從而偶聯(lián)生物降解。本論文首先進(jìn)行了EGSB反應(yīng)器的啟動(dòng)工作,將葡萄糖、尿素、磷酸二氫鉀按質(zhì)量比100:5:1配制成營(yíng)養(yǎng)液,以馴化EGSB反應(yīng)器中的厭氧污泥,經(jīng)90d后系統(tǒng)穩(wěn)定運(yùn)行,EGSB反應(yīng)器的COD降解率保持在90%以上;接著分別開(kāi)展了兩種生物電化學(xué)強(qiáng)化厭氧生物處理的研究:(1)采用納米零價(jià)鐵(nZVI)-EGSB反應(yīng)器耦合處理印染廢水,以活性艷紅X-3B溶液模擬印染廢水,單獨(dú)nZVI和單獨(dú)EGSB作為空白對(duì)照,考察了不同nZVI濃度、pH、初始X-3B濃度、溫度等條件對(duì)該耦合體系處理效果的影響。試驗(yàn)結(jié)果表明:nZVI-EGSB耦合體系能有效去除印染廢水的色度,在染料X-3B初始濃度為100mg/L,nZVI投加量為0.5g/L,pH6.0,30℃的條件下,48h以?xún)?nèi)去除率可達(dá)98.93%。該耦合體系脫色效果明顯高于單獨(dú)nZVI或單獨(dú)EGSB反應(yīng)器處理效果。(2)nZVI活化過(guò)硫酸鉀(PS)系統(tǒng)與EGSB反應(yīng)器聯(lián)合處理印染廢水,以活性艷紅X-3B溶液模擬印染廢水,考察了不同nZVI濃度對(duì)脫色率的影響,nZVI-PS體系作為對(duì)照。試驗(yàn)結(jié)果表明:nZVI濃度為0.2g/L時(shí),nZVI-PS體系在60min的脫色率為96.68%;nZVI-PS-EGSB三者聯(lián)合體系的脫色率可達(dá)99.38%。nZVI-PS-厭氧微生物三者聯(lián)合體系的處理效果明顯優(yōu)于nZVI-PS聯(lián)合體系。(3)針對(duì)EGSB反應(yīng)器進(jìn)行了初步的反應(yīng)機(jī)制研究,取穩(wěn)定運(yùn)行的EGSB反應(yīng)器中已馴化好的污泥,通過(guò)平板劃線分離法,篩選出三種優(yōu)勢(shì)菌株,分別對(duì)其進(jìn)行了分子生物學(xué)鑒定、生長(zhǎng)曲線繪制、降解染料X-3B能力和nZVI-單種菌體處理染料X-3B效果的研究。
[Abstract]:Printing and dyeing wastewater contains a variety of refractory organic pollutants. It is a refractory organic wastewater with high chemical oxygen demand (COD), high chromaticity and "three toxicity". The printing and dyeing wastewater flows into the water environment of our country in large quantities. Biological treatment is one of the effective technologies for dye wastewater treatment. Expanded granular sludge bed (EGSBB) has become one of the most important factors that threaten the safety of water environment in China. It is a kind of "high speed" anaerobic bioreactor with good prospect at present. Nanometer zero-valent iron (NZVI) can not only reduce and convert pollutants efficiently. It can also be used as an electronic donor of anaerobic microorganism to couple biodegradation. In this paper, the start-up of EGSB reactor was first carried out, glucose and urea were added into the reactor. Potassium dihydrogen phosphate was prepared into nutrient solution by mass ratio of 100: 5: 1 to acclimatize anaerobic sludge in EGSB reactor. After 90 days, the system operated stably. The COD degradation rate of EGSB reactor was kept above 90%. Then, two kinds of bioelectrochemical enhanced anaerobic biological treatment were carried out respectively. (1) Nano-zero-valent iron nZVII-EGSB reactor was used to treat printing and dyeing wastewater. The reactive brilliant red X-3B solution was used to simulate printing and dyeing wastewater. NZVI and EGSB were used as blank control. The pH and initial X-3B concentration of nZVI were investigated. The effect of temperature and other conditions on the treatment effect of the coupling system was studied. The experimental results show that the coupling system of 1: nZVI-EGSB can effectively remove the chroma of printing and dyeing wastewater. The initial concentration of dye X-3B is 100 mg / L ~ (-1) L ~ (-1) ZVI = 0.5 g 路L ~ (-1) L ~ (-1) (pH = 6.0 ~ (30) 鈩，

本文編號(hào)：1388979