期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 4, 期 1, 页码 915-923出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2015.12.032
关键词
High total solids concentration; High viscosity; Impellers; Anaerobic digestion; Biogas production; Two-stage configuration
Olive pomace (OP) and olive mill wastewaters (OMW) are two residues that are derived from olive oil production. The high TS content and the presence of polymeric ligno-cellulosic compounds impart a very high viscosity value of about 180 cP to the OP-OMW mixture. In this condition, the Rushton impeller, which is normally used in digesters, is unable to guarantee a homogenous mixing of the reactor medium. Four different impellers have been tested with the aim of improving the mixing of the reaction medium: a Pelton Impeller, a Rushton impeller with six 45 degrees inclined blades, a marine impeller (MI) with three blades and an anchor impeller (AI). The marine and the anchor impellers have permitted homogenization of the reaction medium and have consequently led to a good biogas production. Therefore, these two impellers have been used in combination with a two-stage AD configuration, based on the separation of the two distinctly different groups of bacteria (acidogens and methanogens), in order to reproduce the optimal operative conditions for the different microorganisms in each stage. The tests have demonstrated that an AI can be recommended for a one-stage configuration, while a MI is necessary for a two-stage configuration. (C) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据