Can slurry biogas systems be cost effective without subsidy in Mexico?

被引:20
作者
Gutierrez, Enrique Chan [1 ,2 ,3 ]
Xia, Ao [1 ,2 ,3 ]
Murphy, Jerry D. [1 ,2 ,3 ]
机构
[1] Natl Univ Ireland Univ Coll Cork, Environm Res Inst, Cork, Ireland
[2] UCC, Sci Fdn Ireland SFI Marine Renewable Energy Irela, Cork, Ireland
[3] UCC, Sch Engn, Cork, Ireland
关键词
Pig slurry; Elephant grass; Tropical digesters; Biogas; Biofuel; Economic evaluation; TRANSPORT FUEL; GRASS-SILAGE; BIOMETHANE; DIGESTION; BIOFUEL; GAS; PLANTS;
D O I
10.1016/j.renene.2016.03.096
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Biogas from pig slurry in Mexico has potential to produce 21 PJ per year, equivalent to 3.5% of natural gas consumption in 2013. In this paper, three different scenarios are analysed: mono-digestion of pig slurry in a finisher farm (scenario 1); co-digestion of pig slurry and elephant grass in a finisher farm in situ (scenario 2) and co-digestion of pig slurry and elephant grass in centralised biogas plants (scenario 3). The digesters proposed are anaerobic high density polyurethane (HDPE) covered lagoons. HDPE centralised plants can have capital costs 5 times cheaper than European biogas plants. The economics of utilisation of biogas for electricity generation and as biomethane (a natural gas substitute) were investigated. Economic evaluations for on-site slurry digestion (Scenario 1) and on-site co-digestion of elephant grass and pig slurry (Scenario 2) showed potential for profitability with tariffs less than $US 0.12/kWh(e). For centralised systems (Scenario 3) tariffs of $US 0.161/kWh(e) to $US 0.195/kWh(e) are required. Slurry transportation, energy use and harvest and ensiling account for 65% of the operational costs in centralised plants (Scenario 3). Biomethane production could compete with natural gas if a subsidy of 4.5 c/L diesel (1 m(3) of biomethane) equivalent was available. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:22 / 30
页数:9
相关论文
共 61 条
  • [1] A perspective on the potential role of renewable gas in a smart energy island system
    Ahern, Eoin P.
    Deane, Paul
    Persson, Tobias
    Gallachoir, Brian O.
    Murphy, Jerry D.
    [J]. RENEWABLE ENERGY, 2015, 78 : 648 - 656
  • [2] Effects of feeding ensiled mixtures of elephant grass (Pennisetum purpureum) with three grain legume plants on digestibility and nitrogen balance of West African Dwarf goats
    Ajayi, F. T.
    [J]. LIVESTOCK SCIENCE, 2011, 142 (1-3) : 80 - 84
  • [3] Alexander E., 2010, MEXICO BIODIGESTER D
  • [4] Amendola R., 2005, PASTURES CULTIVOS FO
  • [5] American Society for Testing and Materials, 2005, D427405 ASTM, P1
  • [6] [Anonymous], 2009, INGENERIA REV ACADE
  • [7] Garzón-Zúñga MA, 2014, REV INT CONTAM AMBIE, V30, P65
  • [8] Principles and potential of the anaerobic digestion of waste-activated sludge
    Appels, Lise
    Baeyens, Jan
    Degreve, Jan
    Dewil, Raf
    [J]. PROGRESS IN ENERGY AND COMBUSTION SCIENCE, 2008, 34 (06) : 755 - 781
  • [9] Avifia F., 2013, SISTEMAS BIODIGESTI
  • [10] Binh L.H., 1995, INTENSIVE FARMING PU, P125