[1]范子奇,王應(yīng)軍,任垠安.CaO2聯(lián)合熱預(yù)處理對(duì)污泥產(chǎn)酸的影響及菌群分析[J].中國(guó)給水排水,2021,37(15):21-27.
FAN Zi-qi,WANG Ying-jun,REN Yin-an.Effect of Calcium Peroxide Combined with Thermal Pretreatment on Acid Production of Sludge and Analysis of Bacterial Community[J].China Water & Wastewater,2021,37(15):21-27.
點(diǎn)擊復(fù)制
FAN Zi-qi,WANG Ying-jun,REN Yin-an.Effect of Calcium Peroxide Combined with Thermal Pretreatment on Acid Production of Sludge and Analysis of Bacterial Community[J].China Water & Wastewater,2021,37(15):21-27.
CaO2聯(lián)合熱預(yù)處理對(duì)污泥產(chǎn)酸的影響及菌群分析
中國(guó)給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷 期數(shù): 2021年第15期 頁(yè)碼: 21-27 欄目: 出版日期: 2021-08-01
- Title:
- Effect of Calcium Peroxide Combined with Thermal Pretreatment on Acid Production of Sludge and Analysis of Bacterial Community
- 關(guān)鍵詞:
- 污泥厭氧消化; 過(guò)氧化鈣; 熱預(yù)處理; 揮發(fā)性脂肪酸; 微生物多樣性
- Keywords:
- sludge anaerobic digestion; calcium peroxide; thermal pretreatment; VFAs; microbial diversity
- 摘要:
- 以過(guò)氧化鈣(CaO2)聯(lián)合熱預(yù)處理剩余污泥后進(jìn)行產(chǎn)酸發(fā)酵，分析溶解性COD（SCOD）、pH值、揮發(fā)性脂肪酸(VFAs)產(chǎn)量及微生物群落的變化，并以獲得最高產(chǎn)量的VFAs為目的，得到最佳預(yù)處理工藝參數(shù)。結(jié)果表明，預(yù)處理能使污泥發(fā)酵初始SCOD含量上升；堿量固定時(shí)，所有實(shí)驗(yàn)組的SCOD含量均呈先上升后下降的趨勢(shì)。預(yù)處理中溫度的增加會(huì)使初始pH值呈下降趨勢(shì)；相同溫度下，隨著堿量的增加，初始pH值升高。CaO2聯(lián)合熱預(yù)處理對(duì)VFAs生成有促進(jìn)作用。0.2 g/gVSS的CaO2+90 ℃實(shí)驗(yàn)組、0.3 g/gVSS的CaO2+70 ℃實(shí)驗(yàn)組的VFAs最大產(chǎn)量分別為3 101.7、3 097.4 mg/L，而前者達(dá)到峰值的發(fā)酵時(shí)間較早，故0.2 g/gVSS的CaO2+90 ℃實(shí)驗(yàn)組為最佳方案。微生物測(cè)序結(jié)果表明，預(yù)處理均會(huì)增加后續(xù)發(fā)酵系統(tǒng)中產(chǎn)酸相關(guān)細(xì)菌的豐度，降低污泥中菌群總體豐度，其中聯(lián)合預(yù)處理造成的菌群結(jié)構(gòu)變化更顯著。
- Abstract:
- In order to obtain the highest yield of volatile fatty acids (VFAs) and get the optimal parameters of pretreatment process, excess sludge was pretreated by calcium peroxide (CaO2) and heat for acidogenic fermentation, variations in dissolved chemical oxygen demand (SCOD), pH, VFAs yields and microbial community in the system were analyzed. Pretreatment could increase the initial SCOD of sludge fermentation. When alkalinity was constant, SCOD of all the experimental groups increased first and then decreased. Initial pH decreased with the increase of pretreatment temperature. At the same temperature, the initial pH value increased with the increase of the alkalinity. CaO2 combined with thermal pretreatment promoted the VFAs production. The maximum VFAs yields of 0.2 g/gVSS CaO2+90 ℃ group and 0.3 g/gVSS CaO2+70 ℃ group were 3 101.7 mg/L and 3 097.4 mg/L, respectively, and the former reached the peak earlier. Therefore, the 0.2 g/gVSS CaO2+90 ℃ group was considered to be the best experimental scheme. Microbial sequencing showed that pretreatment would increase the abundance of acid producing bacteria in the subsequent fermentation system and reduce the abundance of total bacterial community in the sludge, and the change of microbial community composition caused by the combined pretreatment was more significant.
相似文獻(xiàn)/References:
[1]武鵬崑,崔常桂,查凱,等.PFS對(duì)污泥厭氧消化中沼氣脫硫的影響[J].中國(guó)給水排水,2020,36(17):75.
WU Peng-kun,CUI Chang-gui,ZHA Kai,et al.Effect of Polychloride Ferric Sulfate on Methane Desulfurization of Sludge Anaerobic Digestion[J].China Water & Wastewater,2020,36(15):75.
更新日期/Last Update: 2021-08-01
