[1]苑宏英,李琦,張嘉藝,等.添加蛋白質類餐廚垃圾促進污泥厭氧發(fā)酵產酸[J].中國給水排水,2022,38(17):100-103.
YUANHong-ying,LIQi,ZHANGJia-yi,et al.Anaerobic Fermentation of Sludge to Produce Acid Promoted by Addition of Protein Food Waste[J].China Water & Wastewater,2022,38(17):100-103.
點擊復制
YUANHong-ying,LIQi,ZHANGJia-yi,et al.Anaerobic Fermentation of Sludge to Produce Acid Promoted by Addition of Protein Food Waste[J].China Water & Wastewater,2022,38(17):100-103.
添加蛋白質類餐廚垃圾促進污泥厭氧發(fā)酵產酸
中國給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期數(shù): 2022年第17期 頁碼: 100-103 欄目: 出版日期: 2022-09-01
- Title:
- Anaerobic Fermentation of Sludge to Produce Acid Promoted by Addition of Protein Food Waste
摘要:- 為了提高發(fā)酵系統(tǒng)中短鏈脂肪酸（SCFAs）的產量，將蛋白質類餐廚垃圾按總固體（TS）質量比為1∶1添加到剩余污泥中，進行為期8 d的間歇式發(fā)酵，研究不同pH對SCFAs產量的影響。結果表明，向污泥中添加蛋白質類餐廚垃圾能夠明顯提高SCFAs產量，混合底物中最大SCFAs產量為215.9 mgCOD/gTS，是單獨污泥的6.1 倍。蛋白質類餐廚垃圾的添加，不僅提高了混合底物中蛋白質含量，而且促進了蛋白質的利用，從而導致SCFAs產量增加。強堿性條件有利于蛋白質含量豐富的混合底物產生SCFAs，這歸因于溶解性COD（SCOD）的大量增加。pH為10的反應組SCOD濃度遠高于其他反應組，為后續(xù)反應提供了基質。對混合底物在pH為10時SCFAs的組成進行分析發(fā)現(xiàn)，最主要的成分是乙酸，其次是丙酸。
Abstract:- To improve the yield of short-chain fatty acids (SCFAs) in fermentation systems, protein food waste was added to the excess sludge at a total solid (TS) mass ratio of 1∶1, and batch experiment with fermentation cycle of 8 days was carried out to investigate the effect of different pH on the yield of SCFAs. The addition of protein food waste to excess sludge could significantly increase the SCFAs yield.The maximum SCFAs yield in the mixed substrate was 215.9 mgCOD/gTS, which was 6.1 times that of the single sludge.The addition of protein food waste not only increased the protein content in the mixed substrate, but also provided easily biodegradable proteins for the microorganisms, which led to the increase of SCFAs yield. Strongly alkaline condition was beneficial for protein-rich mixed substrate to produce SCFAs, which was attributed to the significant increase in soluble COD (SCOD). The SCOD of the experimental group with pH of 10 was much higher than that of the other control groups, which provided a substrate for the subsequent reactions. Analysis of the composition of SCFAs in mixed substrate at pH of 10 showed that acetic acid was the main component, followed by propionic acid.
更新日期/Last Update: 2022-09-01
