Study on Quick Cultivation of Granular Sludge and Its Characteristics in Acidogenic UASB
Dongwei LI1,2,Zhonghui XU1,Kehao Wang3,Zuju XIAO1
(1. College of Resource and Environmental Science,Chongqing University, Chongqing 400044. P.R.China; 2. The Key Laboratory of the Exploitataion of Southwest Resources & the Environmental Hazards Control Engineering,Ministry of Education,Chongqing 400044. P.R.China;3. Guangxi Hualan Design 〈 Group 〉 Co. Ltd., Nanning 530011. P.R.China)
Abstract: The start-up of two-phase UASB reactor designed for experiment is investigated in this paper, so as to seek the rapid start-up method. Glucose and starch are used as the organic-carbon source of the synthetic wastewater in the experiment. Starting up at low organic loading, the influent COD is increased quickly and HRT is shortened by stages, so that acidogenic phase can work in acidic optimal condition as soon as quickly. After 36 days of operation, 69% of total bioparticles are more than 1.0mm, and most of the granular diameter is between 2mm to 3mm in acidogenic reactor. So acidogenic phase achieves rapid start-up successfully.