Anaerobic digestion of horse dung mixed with different bedding materials in an upflow solid-state (UASS) reactor at mesophilic conditions

详细信息    查看全文

• 作者：Janina Bö ; ske^a ; ^{jboeske@gwdg.de" class="auth_mail} ; Benjamin Wirth^b ; Felix Garlipp^a ; Jan Mumme^b ; Herman Van den Weghe^a
• 关键词：Horse manure ; Anaerobic digestion ; Methane ; Solid-state ; UASS
• 刊名：Bioresource Technology
• 出版年：April, 2014
• 年：2014
• 卷：158
• 期：Complete
• 页码：111-118
• 全文大小：1357 K

文摘

Aim of this study was to investigate the use of upflow anaerobic solid-state (UASS) digestion for treating horse manure. Biochemical methane potential (BMP) tests conducted for varying mixtures of dung (hay and silage feed) and bedding material (wheat straw, flax, hemp, wood chips) showed that straw mixed with hay horse dung has the highest potential of . Continuous mesophilic digestion was conducted for 238 days using a single-stage UASS reactor (27 L) and a two-stage UASS system with an anaerobic filter (AF, 21 L). Increasing the organic loading rate (OLR) from 2.5 to 4.5 g_vs L^鈭? d^鈭? enhanced the methane rate of the single-stage reactor from 0.262 to 0.391 L L^鈭? d^鈭? while the methane yield declined from . The two-stage system showed similar yields. Thus, for solid-state digestion of horse manure a single-stage UASS reactor appears sufficient.