A pilot scale study on synergistic effects of co-digestion of pig manure and grass silage

被引：31
|
作者：
Xie, Sihuang [1 ,5 ]
Lawlor, Peadar G. [2 ]
Frost, Peter [3 ]
Dennehy, Conor D. [1 ]
Hu, Zhenhu [4 ]
Zhan, Xinmin [1 ]
机构：
[1] Natl Univ Ireland, Coll Engn & Informat, Civil Engn, Galway, Ireland
[2] TEAGASC, Pig Dev Dept, Anim & Grassland Res & Innovat Ctr, Moorepk, Fermoy, Cork, Ireland
[3] Agri Food & Biosci Inst, Hillsborough, Co Down, North Ireland
[4] Hefei Univ Technol, Sch Civil Engn, Hefei, Anhui, Peoples R China
[5] Univ Wollongong, Sch Civil Min & Environm Engn, Strateg Water Infrastruct Lab, Wollongong, NSW 2522, Australia
来源：
INTERNATIONAL BIODETERIORATION & BIODEGRADATION | 2017年 / 123卷
基金：
爱尔兰科学基金会;
关键词：
Anaerobic co-digestion; Bioenergy recovery; Organic waste; Pilot-scale evaluation; Synergistic effects; 2-STAGE ANAEROBIC-DIGESTION; METHANE PRODUCTION; SWINE MANURE; BIOGAS PRODUCTION; WASTE-WATER; ENERGY CROPS; ORGANIC WASTES; SEWAGE-SLUDGE; FOOD WASTE; INHIBITION;
D O I：
10.1016/j.ibiod.2017.07.005
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
This study aimed to assess the system stability and synergistic effects of co-digesting pig manure (PM) and grass silage (GS) in a pilot-scale study. Anaerobic digestion of PM alone and co-digestion of PM with GS was carried out in a 480-L continuously stirred tank reactor. The experiment consisted of two phases. In Phase I, PM was digested at an organic loading rate (OLR) of 0.87 kg volatile solid (VS) m(-3).d(-1), and in Phase II, PM and GS were co-digested at 1:1 on a VS basis at an OLR of 1.74 kg VS.m(-3).d(-1) The pilot-scale anaerobic digestion system was stable in both phases. At the steady state, average pH and free ammonia concentrations were 7.99 and 233.0 mg l(-1) in Phase I and were 7.77 and 158.3 mg l(-1) in Phase II, respectively. The specific methane yields increased from 154 ml CH4/g VS added in Phase Ito 251 ml CH4/g VS added in Phase II. On average, soluble chemical oxygen demand and VS removal efficiencies increased from 81.4% and 41.4% in Phase Ito 87.8% and 53.9% in Phase II, respectively. Further evaluation of synergism suggests that co-digestion of PM and GS can improve system stability and biogas yields despite marginal synergistic effects at pilot-scale. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：244 / 250
页数：7
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