發(fā)布時間：2018-01-06 18:27

  本文關鍵詞：生物電化學強化對印染廢水厭氧生物處理的影響研究　出處：《武漢紡織大學》2016年碩士論文　論文類型：學位論文

  更多相關文章： 活性艷紅X-3B EGSB反應器 納米零價鐵 生物電化學 脫色

【摘要】：印染廢水含有多種難降解有機污染物,是具有高化學需氧量(COD)、高色度、“三致”毒性的難降解有機廢水。印染廢水大量流入我國水體環(huán)境,已經成為威脅我國水環(huán)境安全的重要因素之一。生物處理法是實現染料廢水處理的有效技術之一。膨脹顆粒污泥床(EGSB)是目前很有發(fā)展前景的一種“高速”厭氧生物反應器。納米零價鐵(nZVI)不僅可高效還原轉化污染物,其腐蝕產H2過程還可作為厭氧微生物電子供體,從而偶聯生物降解。本論文首先進行了EGSB反應器的啟動工作,將葡萄糖、尿素、磷酸二氫鉀按質量比100:5:1配制成營養(yǎng)液,以馴化EGSB反應器中的厭氧污泥,經90d后系統(tǒng)穩(wěn)定運行,EGSB反應器的COD降解率保持在90%以上;接著分別開展了兩種生物電化學強化厭氧生物處理的研究:(1)采用納米零價鐵(nZVI)-EGSB反應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nZVI和單獨EGSB作為空白對照,考察了不同nZVI濃度、pH、初始X-3B濃度、溫度等條件對該耦合體系處理效果的影響。試驗結果表明: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以內去除率可達98.93%。該耦合體系脫色效果明顯高于單獨nZVI或單獨EGSB反應器處理效果。(2)nZVI活化過硫酸鉀(PS)系統(tǒng)與EGSB反應器聯合處理印染廢水,以活性艷紅X-3B溶液模擬印染廢水,考察了不同nZVI濃度對脫色率的影響,nZVI-PS體系作為對照。試驗結果表明:nZVI濃度為0.2g/L時,nZVI-PS體系在60min的脫色率為96.68%;nZVI-PS-EGSB三者聯合體系的脫色率可達99.38%。nZVI-PS-厭氧微生物三者聯合體系的處理效果明顯優(yōu)于nZVI-PS聯合體系。(3)針對EGSB反應器進行了初步的反應機制研究,取穩(wěn)定運行的EGSB反應器中已馴化好的污泥,通過平板劃線分離法,篩選出三種優(yōu)勢菌株,分別對其進行了分子生物學鑒定、生長曲線繪制、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：1388979