化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2015年
5期
1897-1903
,共7页
厌氧%生物反应器%废水%水力停留时间%颗粒污泥%胞外聚合物
厭氧%生物反應器%廢水%水力停留時間%顆粒汙泥%胞外聚閤物
염양%생물반응기%폐수%수력정류시간%과립오니%포외취합물
anaerobic%bioreactors%waste water%hydraulic retention time%granular sludge%extracellular polymeric substances
研究了不同水力停留时间（HRT，24 h、18 h、15 h、12 h）对双循环（DC）厌氧反应器处理中药废水效能的影响，并对颗粒污泥的粒径分布（PSD）、胞外聚合物（EPS）、微生物群落等变化情况进行了分析。结果表明， HRT由24 h缩短为12 h后，DC厌氧反应器对COD的去除率仍在90%以上。虽然出水中乙酸含量升高到339.69 mg·L?1，但未造成VFA的过度累积；出水中辅酶的荧光吸收峰有所降低，而类腐殖酸与类富里酸的吸收峰增强，不适宜再继续降低HRT。随着HRT的缩短，颗粒污泥的EPS总量、蛋白含量、多糖含量均降低，其中酪氨酸对于保持污泥的稳定性发挥着重要作用。而磷脂脂肪酸分析（PLFA）表明，HRT缩短对于DC厌氧反应器第2反应区内微生物群落分布影响显著，革兰阳性菌由原来占总脂肪酸生物量的44.24%下降到32.69%，而革兰阴性菌由32.69%增大到38.66%。
研究瞭不同水力停留時間（HRT，24 h、18 h、15 h、12 h）對雙循環（DC）厭氧反應器處理中藥廢水效能的影響，併對顆粒汙泥的粒徑分佈（PSD）、胞外聚閤物（EPS）、微生物群落等變化情況進行瞭分析。結果錶明， HRT由24 h縮短為12 h後，DC厭氧反應器對COD的去除率仍在90%以上。雖然齣水中乙痠含量升高到339.69 mg·L?1，但未造成VFA的過度纍積；齣水中輔酶的熒光吸收峰有所降低，而類腐殖痠與類富裏痠的吸收峰增彊，不適宜再繼續降低HRT。隨著HRT的縮短，顆粒汙泥的EPS總量、蛋白含量、多糖含量均降低，其中酪氨痠對于保持汙泥的穩定性髮揮著重要作用。而燐脂脂肪痠分析（PLFA）錶明，HRT縮短對于DC厭氧反應器第2反應區內微生物群落分佈影響顯著，革蘭暘性菌由原來佔總脂肪痠生物量的44.24%下降到32.69%，而革蘭陰性菌由32.69%增大到38.66%。
연구료불동수력정류시간（HRT，24 h、18 h、15 h、12 h）대쌍순배（DC）염양반응기처리중약폐수효능적영향，병대과립오니적립경분포（PSD）、포외취합물（EPS）、미생물군락등변화정황진행료분석。결과표명， HRT유24 h축단위12 h후，DC염양반응기대COD적거제솔잉재90%이상。수연출수중을산함량승고도339.69 mg·L?1，단미조성VFA적과도루적；출수중보매적형광흡수봉유소강저，이류부식산여류부리산적흡수봉증강，불괄의재계속강저HRT。수착HRT적축단，과립오니적EPS총량、단백함량、다당함량균강저，기중락안산대우보지오니적은정성발휘착중요작용。이린지지방산분석（PLFA）표명，HRT축단대우DC염양반응기제2반응구내미생물군락분포영향현저，혁란양성균유원래점총지방산생물량적44.24%하강도32.69%，이혁란음성균유32.69%증대도38.66%。
The influence of hydraulic retention time (HRT, 24, 18, 15 and 12 h) on the performance of double circle (DC) anaerobic reactor for treating traditional Chinese medicine wastewater was investigated. Additionally, the characteristics of granular sludge were studied, including particle size distribution (PSD), extracellular polymeric substances (EPS), and distribution of microbial communities. When HRT was reduced from 24 h to 12 h, the DC anaerobic reactor demonstrated good COD removal of 90%. Although concentration of acetate increased to 339.69 mg·L?1, the process was operating favorably without acidification. But humic acid-like and fulvic acid-like absorption peaks were stronger and coenzyme F420 absorption was weaker in the EEM spectra of soluble microbial products (SMP) at HRT 12 h. It was not recommended to further reduce HRT. The contents of EPS, protein, and polysaccharide decreased in the sludge at HRT 12 h, and tyrosine played an important role in maintaining stability of the sludge. The phospholipid fatty acids analysis showed that reducing HRT affected significantly distribution of microbial community in the second reaction area of the DC anaerobic reactor. Gram-positive bacteria decreased from 44.24% to 32.69%, while gram-negative bacteria increased from 32.69% to 38.66%.
