Anthracite bio-degradation by methanogenic consortia in Qinshui basinby Dong Xiao, Suping Peng, Baoyu Wang, Xiaoxin Yan

International Journal of Coal Geology

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Year
2013
DOI
10.1016/j.coal.2013.06.008
Subject
Economic Geology / Geology / Fuel Technology / Stratigraphy

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Tech th to ld ons eral

CH4 int wo inc 2 ~ sin albed m en a g area ( ui bas he Qins inshui 1). Three functionally convert someorganic

International Journal of Coal Geology 116–117 (2013) 46–52

Contents lists available at ScienceDirect

International Journa l sereserve in the Qinshui basin represents a quarter of the total industry in

China (Liu and Wang, 2008). The No. Fm 3# coal bed and the No. Fm 15# coal bed are typical anthracite seams (Fig. 1). Currently, few studies compounds tomethane (Mclnerney and Beaty, 1988; Thiele et al., 1981;

Winfrey, 1984): (1) hydrolytic fermentative bacteria, (2) syntrophic acetogenic bacteria, and (3) methanogenic bacteria (Fig. 2).91.1 billion m3 of methane (Fan et al., 2006).

As an important coalbedmethane industry base, the coalbedmethane with different bacteria (Strapoc et al., 2008, 201 different trophic groups of bacteria are required toness of the seam is 2.0–7.3 m. The geology survey report shows that a 1.82 × 108 m2 area of Fanzhuang block, which is located on the east part of Qinshui basin, is typically a CBMseamand contains approximately 35.2 billion m3 of methane. The Zhaozhuang block, which is located on the west part of this basin, is also a typical CBM seam. The CBM field of the Zhaozhuang block is 4.47 × 108 m2 and contains approximately potential of b0.3 V, which corresponds to 10−56 moles per liter of oxygen (Games and Hayes, 1978; Zinder, 1993). The main pathways of biogenic methane generation in the coal bed are the carbon dioxide reduction and acetate reduction methanogenesis implemented by archaea (Penner et al., 2010; Whiticar et al., 1986). The consortia degrade organic compounds in the coal bed and require metabolic interactionsof coalbed methane enhancement by microb ⁎ Corresponding author at: Minzu building 221, Chi

Technology (Beijing), College Road Ding 11, Haidian, Beijing 026321 (mobile).

E-mail address: dong.shaw@gmail.com (D. Xiao). 0166-5162/$ – see front matter © 2013 Elsevier B.V. All http://dx.doi.org/10.1016/j.coal.2013.06.008basin (see Fig. 1 for map

Shanxi Fm 3# seam and 0–1000 m, and the thickmethod that enhances natural gas with secondary biogenic gas generation in coal beds. Methanogenic consortia, which exist in many coal beds, are strictly anaerobes. The consortia require an oxidation/reductionof the basin). The main CBM is located in the the Taiyuan Fm15# seam. The burial depth is 351. Introduction 1.1. Geological conditions of Qinshui ba

Interest in the development of a co in the Qinshui basin began in 2003 wh that there are methane reserves in this et al., 2001). Gas-in-place in the Qinsh be 450 billion m3 (Fan et al., 2006). T on the southern arc slope belt of the Qethane (CBM) resource eology survey confirmed

Wang et al., 2004; Zhang in has been estimated to hui CBM field is located performed for anthracite coal bed. If bio-methane genesis could occur in situ along with the fundamental research that has been performed regarding this process, the anthracite coalbed methane industry could experience significant growth. 1.2. The concept of coalbed methane reserve enhancement by microbial technology

Microbially enhanced coalbed methane (MECoM) is a biological© 2013 Elsevier B.V. All rights reserved.Coalbed methane

Anaerobic metabolism bio-degradation.Anthracite bio-degradation by methanoge

Dong Xiao a,b,⁎, Suping Peng b, Baoyu Wang a, Xiaoxin a Jincheng Anthracite Co., Ltd., Jincheng, Shanxi, 048000, China b State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and c Xiangya School of Medicine, Central South University, Changsha, 410013, China a b s t r a c ta r t i c l e i n f o

Article history:

Received 28 February 2013

Received in revised form 30 June 2013

Accepted 30 June 2013

Available online 7 July 2013

Keywords:

Qinshui basin

Anthracite

Bio-degradation

Microbial

Studies have identified that main goals of this study are this high rank coal bed cou that types of methanogenic c sources to yield biogas. Mac methane yield process. The volatile matter in anthracite bio-degradation process can is located in the Shanxi prov that approximately 3.0 × 10− j ourna l homepage: www.eial treatment have been na University of Mining and 100083, China. Tel.: +86 18626 rights reserved.ic consortia in Qinshui basin an c nology, Beijing, 100083, China e methanogenic consortia live in bituminous and lignite coal beds. The two verify the existence of the consortia in anthracite and to determine whether provide nutrients for the methanogenic consortia. Research has confirmed ortia live in the Qinshui basin and use some compounds in anthracite as carbon analysis confirmed that volatile matter is a controlling factor in the biological and CO2 yield process showed that the methanogenic consortia can degrade o bio-methane in situ. This study confirmed that the methanogenic consortia rk on anthracite to increase the CH4 concentration in the Qinshui basin, which e and is an important methane-producing coal seam in China. It was estimated 4.0 × 10−2 m3/kg ofmethane can be generated in the Qinshui basin bymicrobial l of Coal Geology v ie r .com/ locate / i j coa lgeoCoal is a complexmixture. The fixed carbon content increases as coal matures. In contrast, the concentration of the sample carbon compounds decreases. The bio-degradability of bituminous and lignite coal has been identified (Barik et al., 1988, 1991a, 1991b). Research has also confirmed that it is difficult for microbes to degrade large, complex carbon sources, such as fixed carbon. However, it is unclearwhether high rank coal beds the absorbedmethane and carbon dioxide until no gas could be desorbed at atmospheric pressure in 25 °C(Barker et al., 2002; Moore and Butland,

Fig. 1. The generalized north to south cross section of Qinshui basin. The average Fm 3#coal and the average Fm 15# coal seam thickness is 4.25 m, the burial depth is 434 m in Sihe an 47D. Xiao et al. / International Journal of Coal Geology 116–117 (2013) 46–52contain the organic compounds that could be used as substrates for methanogenic consortia. The goal of this research was to identify the existence and activity ofmethanogenic consortia in anthracite bymicroorganism cultivation with coal samples (Table 1). 2. Samples and methods 2.1. Sampling