EFFECT OF HYDRAULIC LOADING RATE ON ACIDOGENESIS IN A MEMBRANE-COUPLED ANAEROBIC VFAs FERMENTER

摘要

A membrane-coupled anaerobic VFAs fermenter (MCAVF) was operated with five different hydraulic loading rates (3, 2, 1, 0.5 and 0.25 day~-1) to evaluate its influence on acid phase VFAs production from coagulated raw sludge. Results show that C_2 to C_5 volatile fatty acids were formed as predominant compounds. At constant solids retention time (SRT) of 10 days, VFAs production ratio moderately increased over the range of hydraulic loading rate (HLR) of 3 day~-1 to 2 day~-1 to 2 day, but Significantly decreased at other HLR conditions.