CIESC Journal ›› 2011, Vol. 62 ›› Issue (1): 220-225.
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SONG Xiulan,LI Yaxin
Online:
Published:
宋秀兰,李亚新
Abstract:
Effects of ferric chloride (FeCl3) concentration on the product distribution of acidogenic fermentation of sludge, expressed by propionic acid ratio, was investigated in sequencing batch reactor with semi-continuous operation mode.The results show that under these conditions: temperature 32℃, HRT 6.6 d, feed VS 20.43 g·L-1, pH 5.5—6.0, ORP of fermentation liquid increases gradually while propionic acid ratio in fermentation products changes a little, although FeCl3 concentration varying from 0 to 232 mg·L-1.When the concentration of FeCl3 is at 464—928 mg·L-1range, ORP increases significantly and at the same time propionic acid ratio goes up from 25.82% to 49.57%.One feasible start-up modes are proposed with aerobic activated sludge for sludge acid-type fermentation using conditions of temperature 32℃, HRT 6.6 d, pH 5.5—6.0, FeCl3 464 mg·L-1.With this start-up mode, acid-type fermentation can run smoothly after 6 day and propionic acid ratio can reach 50%.
Key words: 污泥, 丙酸型发酵, 启动方式, 三氯化铁
摘要:
采用半连续运行的序批式反应器进行污泥酸性发酵试验,研究了发酵液中FeCl3浓度对污泥发酵产物中丙酸比率的影响。实验表明:在温度32℃、HRT 6.6 d、进泥VS浓度 20.43 g·L-1、pH5.5~6.0的条件下,FeCl3浓度由0增加到232 mg·L-1时,发酵液中ORP逐渐提高,丙酸比率变化不大;FeCl3污泥, 丙酸型发酵, 启动方式, 三氯化铁
SONG Xiulan, LI Yaxin. Effects of FeCl3 on propionic acid ratio in products of acidogenic fermentation of sludge[J]. CIESC Journal, 2011, 62(1): 220-225.
宋秀兰, 李亚新. FeCl3对污泥酸性发酵产物中丙酸比率的影响 [J]. 化工学报, 2011, 62(1): 220-225.
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https://hgxb.cip.com.cn/EN/Y2011/V62/I1/220
Morphology and mechanism of sludge flocculation based on mesoscopic simulation