Experimental Studies on Anaerobic Digestion of Straw Stalk Mixed with Pig Dung

Abstract:

A series of anaerobic digestion experiments on straw stalk mixed with pig dung was carried out at mid-temperature (35°C) by using the self-designed continuous stirring tank reactor (CSTR) in different organic load rates (OLR). Anaerobic digestion indexes, such as pH, ammonia-nitrogen, volatile fatty acid (VFA), total alkalinity, quantity of gas production and production rate of methane under the different organic load were studied and the aerogenic capability of the system and its stability were analyzed, so as to find the optimal organic load rate for anaerobic digestion reaction. The results show that: (1) With the OLR increases from 0.5-2.0g VS/(L·d) step by step, the pH value is always maintained 6.7-7.2; the average daily gas-production quantity is 869-3232 mL; the average ammonia-nitrogen concentration in the anaerobic digestion process has kept 522-850mg/L; the VFA concentration has remained between 1520-3420mg/L; the average total alkalinity is among 2152-2441mg/L . (2) The anaerobic digestion system is stable when the OLR increases from 0.5-2.0g VS/(L·d), and the optimal organic load rate is 1.5g VS/(L·d) for volume fraction of methane.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 2774-2778
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.2774
• Online since: June 2014
• Authors: Xiao Fei Sun, Shuang Ying Zheng*, Xue Tong Liu, Hui Ye
• Keywords: Anaerobic Digestion, Methane, Pig Dung, Straw Stalk

References

[1] Yongming Sun, Cuoxue Li, Fudao Zhang, et al. Status quo and developmental strategy of agricultural residues resources in China [J]. Transactions of the CSAE, 2005, 21(8): 169-173. (In Chinese with English Abstract).

[2] Gehua Wang, Yalin Tian. New village and biomass energy development strategy [J]. Transactions of the CSAE, 2006, 22(Supp1): 1- 3. (In Chinese with English abstract).

[3] Yutai Liu. Biogas fermentation microorganisms and anaerobic technology[M]. Beijing: Science Press, 1990. (In Chinese).

[4] National Bureau of Statistics of the People's Republic of China. China State Statistical Yearbook of 2005[M]. Beijing: China Statistics Press, 2006. (In Chinese).

[5] Ruihong Zhang, Zhiqiang Zhang. Biogasification of rice straw with an Anaerobic- phased solids digester system [J]. Bioresource Technology, 1999, 68: 235-245.

DOI: 10.1016/s0960-8524(98)00154-0

[6] Qingming Luo, Xiujin Li, Baoning Zhu, et al. Anaerobic biogasification of NaOH-treated corn stalk [J]. Transactions of the CSAE, 2005, 21(2): 111-115.

[7] Jonatan A, Lovisa B. Evaluation of straw as a biofilm carrier in the methanogenic stage of two-stage anaerobic digestion of crop residues [J]. Bioresource Technology, 2002, 85: 51-56.

DOI: 10.1016/s0960-8524(02)00071-8

[8] Yajie Pan, Lei Zhang, Jun Guo, Dalei Zhang. The study on biological degrading of crops straw[J]. Renewable Energy, 2005(3): 33-35. (In Chinese with English Abstract).

[9] Lianhua Li, Longlong Ma, Zhenhong Yuan, Xiaofeng Liu, Cuiping Liao. Study on Anaerobic Digestion of Straw Stalk [J]. Journal of Agro-Environment Science, 2007, 26(1): 335-338. (In Chinese with English Abstract).

[10] Guixiang Quan, Zhizhou Chang, Xiaomei Ye, Jing Du, Shimei Wang. Study on conditions and influencing factors of Straw biogas dry fermentation quick launch [J]. Jiangsu Agricultural Sciences, 2009(3): 366-368. (In Chinese).

[11] Rongyu He, Zhiying Yan, Xiaofeng Liu, Yuexiang Yuan, Yinzhang Liao, Jiajing Wang, Rongna He, Xudong Li. Enhancement of Biogas Production by Dry Fermentation with Straws[J]. Chinese Journal of Applied & Environmental Biology, 2007, 13(4): 583-585. (In Chinese with English Abstract).

[12] Zhijian Gao. Experimental study on anaerobic digestion of corn Stover[D]. Beijing University of Chemical Technology. 2004 (In Chinese).

[13] Xutao Wang, Bailiang Zhang. Study on anaerobic digestion of steam explosion pretreated corn stalk[J]. China Biogas, 2013, 31(1): 10-11. (In Chinese with English Abstract).

[14] Ruihong Zhang, Zhiqiang Zhang. Biogasification of rice straw with an anaerobic phased solids digester system[J]. Bioresource Technology, 1999, 68: 235-245.

DOI: 10.1016/s0960-8524(98)00154-0