【摘要】：為破解城市剩余污泥中的微生物細(xì)胞膜,提高污泥的厭氧消化效能。采用μs級脈沖電場對污泥試樣進行處理,通過光學(xué)顯微鏡觀察微生物細(xì)胞經(jīng)脈沖電場處理后的性狀變化,基于分光度法測量污泥試樣的溶解性化學(xué)需氧量,分析脈沖電場參數(shù)和環(huán)境溫度等因素對微生物細(xì)胞內(nèi)有機成分釋放程度的影響。結(jié)果表明:當(dāng)脈沖電場幅值從0.588 MV/m增大至1.470 MV/m時,微生物細(xì)胞內(nèi)有機成分滲出指數(shù)K提高約40倍;當(dāng)溫度從20℃升高至60℃時,K提高約60倍;而當(dāng)脈沖電場重復(fù)頻率從1 Hz增大至100 Hz時,K降低38.5%。其主要原因為,脈沖電場作用下微生物細(xì)胞膜的電穿孔現(xiàn)象引發(fā)了細(xì)胞內(nèi)有機成分的釋放,脈沖電場參數(shù)和環(huán)境溫度的改變導(dǎo)致細(xì)胞膜電穿孔的微觀物理過程發(fā)生變化,從而影響了有機成分的滲出程度。
[Abstract]:In order to solve the microbial cell membrane in the municipal excess sludge and improve the anaerobic digestion efficiency of sludge. The sludge samples were treated with 渭 s pulsed electric field. The characteristics of microbial cells treated with pulsed electric field were observed by optical microscope. The dissolved chemical oxygen demand (COD) of sludge samples was measured based on spectrophotometry. The effects of pulsed electric field parameters and ambient temperature on the release degree of organic components in microbial cells were analyzed. The results showed that when the amplitude of pulsed electric field increased from 0.588 MV/m to 1.470 MV/m, the exudation index K increased about 40 times, and when the temperature increased from 20 鈩，

本文編號：2281683