Details

Autor(en) / Beteiligte

• Li, Xiao-Ling
• Peng, Yong-Zhen
• Chai, Tong-Zhi
• Zhu, Jian-Ping
• Wang, Shu-Ying

Titel

New ways to improve volatile fatty acids accumulation in sludge alkaline fermentation system

Ist Teil von

• Huanjing kexue, 2014-07, Vol.35 (7), p.2658

Ort / Verlag

China

Erscheinungsjahr

2014

Quelle

MEDLINE

Beschreibungen/Notizen

• To improve the hydrolysis and acidification of activated sludge, two new ways, which were adding fermented sludge or sterilized fermented sludge to batch-mode activated sludge alkaline fermentation system, were investigated in this study. Temperature effect was also studied (10 degrees C and 35 degrees C). Result showed that mesophilic condition greatly enhanced sludge hydrolysis and acidification, which resulted in an obvious volatile fatty acids (VFAs) accumulation in the system. These two new ways could improve both sludge hydrolysis and acidification. The hydrolysis and acidification efficiencies of adding sterilized fermented sludge system were 2 and 1.5 times higher than those of adding fermented sludge system, respectively. In addition, VFAs content was nearly constant in a long time in sterilized fermented sludge addition system while it greatly consumed in fermented sludge addition system. The reason for this enhancement of two new ways were different, fermented sludge addition increased the amount o