本文選題：PPCPs + 傳統(tǒng)活性污泥法�。� 參考：《北京化工大學(xué)》2015年碩士論文

【摘要】：藥品和個(gè)人護(hù)理用品(PPCPs)是指在環(huán)境中持續(xù)存在的低濃度有機(jī)污染物,對(duì)環(huán)境帶來了很多不利影響。本論文主要研究了三種常用生物處理工藝CAS、SBR和SBBR,對(duì)模擬城市生活污水中低濃度頭孢呋辛酯的降解機(jī)理和污泥中的抗性基因情況,得到結(jié)論如下：1.CAS工藝穩(wěn)定運(yùn)行條件為：頭孢呋辛酯濃度0.5mg/L,污泥負(fù)荷0.4kgCOD/(kgMLSS·d),水力停留時(shí)間12h,在此條件下,CAS工藝對(duì)模擬城市生活污水中COD的去除率為95.82%,對(duì)氨氮的去除率為92.41%,對(duì)頭孢呋辛酯的去除率為91.54%；SBR工藝穩(wěn)定運(yùn)行條件為：頭孢呋辛酯濃度0.5mg/L,污泥負(fù)荷0.3kgCOD/(kgMLSS·d),水力停留時(shí)間12h,進(jìn)水pH 7.5,在此條件下,SBR工藝對(duì)模擬城市生活污水中COD的去除率為98.80%,對(duì)氨氮的去除率為85.19%,對(duì)頭孢呋辛酯的去除率為98.17%,并且SBR工藝降解頭孢呋辛酯抗生素最符合一級(jí)動(dòng)力學(xué)規(guī)律；SBBR工藝穩(wěn)定運(yùn)行條件為：頭孢呋辛酯濃度0.5mg/L,污泥負(fù)荷0.4kgCOD/(kgMLSS·d),水力停留時(shí)間12h,進(jìn)水pH為7.5,在此條件下,SBBR工藝對(duì)模擬城市生活污水中COD的去除率為94.26%,對(duì)氨氮的去除率為58.31%,對(duì)頭孢呋辛酯的去除率為64.74%,并且SBBR工藝降解頭孢呋辛酯抗生素最符合零級(jí)動(dòng)力學(xué)規(guī)律。2.活性污泥工藝和SBBR工藝降解頭孢呋辛酯的中間產(chǎn)物與最終產(chǎn)物類似,都是頭孢呋辛酯分子逐漸脫去支鏈的小分子,最終p-內(nèi)酰胺環(huán)斷裂,并且被降解為H20和CO2。3.三種樣品的微生物群落多樣性順序?yàn)椋夯钚晕勰喙に嚱臃N污泥序批式生物膜反應(yīng)器。活性污泥反應(yīng)器中篩選分離得到蒼白桿菌屬(Ochrobactrum sp.) CS2和產(chǎn)堿桿菌屬(Alcaligenes sp.) CS4兩種優(yōu)勢(shì)菌株；SBBR反應(yīng)器中篩選分離得到氣單胞菌屬(Aeromonas sp.)的BB3和BB4兩種優(yōu)勢(shì)菌株。4.接種污泥、活性污泥工藝和序批式生物膜反應(yīng)器(SBBR)污泥中檢測(cè)出3種β-內(nèi)酰胺抗性基因：OXA-1、OXA-2和OXA-10。
[Abstract]:Drugs and personal care products (PPCPs) are low concentrations of organic pollutants that persist in the environment and have a lot of adverse effects on the environment. In this paper, the degradation mechanism of low concentration cefuroxime in simulated municipal sewage and the resistance genes in sludge were studied. The results are as follows: 1. The stable operation conditions of CAS process are as follows: cefuroxime concentration 0.5 mg / L, sludge loading 0.4 kg COD / kg MLSs dl, HRT 12 h. Under this condition, the COD removal rate and ammonia nitrogen removal rate of CAS process are 95.82 and 95.82 respectively. 92.41, the removal rate of cefuroxime octyl ester is 91.54 and the stable operating conditions of SBR process are as follows: cefuroxime octyl ester concentration 0.5 mg / L, sludge loading 0.3 kg COD / kg MLSs dl, HRT 12 h, influent pH 7.5. Under these conditions, SBR process can remove COD from simulated municipal sewage. For 98.80, the removal rate of ammonia nitrogen was 85.19, the removal rate of cefuroxime ester was 98.17.The degradation of cefuroxime ester antibiotics by SBR process was most consistent with the first-order kinetic law. The stable operation conditions of SBBR process were as follows: cefuroxime octyl ester concentration 0.5 mg / L, sludge negative. Under these conditions, the removal rate of COD, ammonia nitrogen, cefuroxime ester and cefuroxime were 94.26, 58.31, 64.74, respectively, and the SBBR process was used to degrade cefuroxime, respectively, under the condition that the HRT was 12h and the influent pH was 7.5. The removal rate of COD, ammonia and cefuroxime was 94.26, 58.31 and 64.74 respectively, and the SBBR process was used to degrade cefuroxime. Octyl ester antibiotics accord with the zero order kinetic law. 2. The intermediate products of cefuroxime ester degradation by activated sludge process and SBBR process are similar to the final products. They are small molecules of cefuroxime ester gradually removed from the branched chain, and finally the p-lactam ring breaks down and is degraded into H20 and CO2.3. The sequence of microbial community diversity of the three samples was as follows: activated sludge process inoculated sludge sequencing batch biofilm reactor. Ochrobactrum sp. was isolated from activated sludge reactor. CS2 and Alcaligenes sp. Aeromonas sp. was isolated from two dominant strains of CS4 in SBBR reactor. Two dominant strains of BB3 and BB4. Three 尾 -lactam resistance genes, 1: OXA-1, OXA-2 and OXA-10, were detected in sludge from inoculated sludge, activated sludge process and sequencing batch biofilm reactor (SBBRR).
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703

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本文編號(hào)：1987732