Hydrolyzing and leaching of organic waste in anaerobic condition and sequencing batch

作者：Zhao Hua; Peng Xu ya^*; Wu Xiang; Liu Guo tao

来源：Journal of Central South University of Technology, 2007, 14: 351-355.

DOI：10.1007/s11771-007-0424-2

• organic wastes
• two-phase anaerobic digestion
• hydrolysis and acidogenesis
• leaching model

According to the studies on the leaching rules of organic compounds of the wastes in hydrolysis process before, the leaching efficiency is seldom high enough. During the comparative experiments, parameters such as COD, VFAs, and NH3-N were investigated to study the improvement of leaching efficiencies. Organic wastes were soaked in the UASB reactor effluents in anaerobic conditions and sequencing batch mode at 25 degrees C and neutral situation to study its hydrolization and leaching rules. The coefficient of variation of the COD leaching cumulants per VS along with the time was fit using Logarithmic fitting mode. The experimental results show that the leaching quantities and leaching concentrations of COD and VFAs in the leaching liquid gradually decline along with the increase of the soaking time but the same parameters of NH3-N firstly increases and then declines. At the same time, the equation that depicts the relationship between COD leaching cumulants and soaking time are determined. This mathematical model that reflects the leaching rules of organic compounds in sequencing hydrolization-UASB anaerobic digestion technology can also apply to the other anaerobic digestion technology at a certain extent.

• 出版日期2007-12
• 单位重庆大学