[1] Hua Jia, Zhang Linsheng, Pan Yanli, Li Yuezhong, et al. H2S removal in landfill leachate treatment using UASB reactor [J]. Journal of Southeast University (English Edition), 2010, 26 (1): 91-95. [doi:10.3969/j.issn.1003-7985.2010.01019]
Copy
H2S removal in landfill leachate treatment using UASB reactor(
)
UASB反应器处理垃圾渗滤液过程中的H2S去除
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 26
- Issue:
- 2010 1
- Page:
- 91-95
- Research Field:
- Environmental Science and Engineering
- Publishing date:
- 2010-03-30
Info
- Title:
- H2S removal in landfill leachate treatment using UASB reactor
- UASB反应器处理垃圾渗滤液过程中的H2S去除
- Author(s):
- Hua Jia1; Zhang Linsheng1; Pan Yanli2; Li Yuezhong2
-
1School of Energy and Environment, Southeast University, Nanjing 210096, China
2Wehrle Environmental Technology Co., Ltd., Changzhou 213022, China
- 垃圾渗滤液; 升流式厌氧污泥床(UASB); H2S; FeCl3; 硫平衡
- PACS:
- X506
- DOI:
- 10.3969/j.issn.1003-7985.2010.01019
- Abstract:
- Leachate from a sanitary landfill site in Chengdu, China is treated using a hybrid-UASB reactor at pilot scale. H2S, resulting from the anaerobic bioconversion process of sulfate-reducing bacteria(SRB), inhibits the growth and activity of methane-producing bacteria(MPB)and poses serious problems of pollution, so FeCl3is used for H2S removal. The results show that the system performs well in the treatment process. COD removal generally increases with the increase in the organic loading rate(OLR), while the sulfate removal decreases slowly. As the OLR is higher than 7 kgCOD/(m3·d), both COD and sulfate removal tend to be stable. When the reactor is operated at the design load of 9 kgCOD/(m3·d), COD and sulfate removal remain about 79% and 91%, respectively. At the same time, the percentage of COD removed by SRB(CODSRB)also decreases from 8.9% to 4.0%. With FeCl3 addition, COD removal increases to 83%, while sulfate removal and CODSRBfurther decrease to 89% and 1.89%, respectively. According to the mass balance, nearly 82% of the sulfur is prevented from converting into H2S. Moreover, when the FeCl3 dosage is more than 1.6 g/L leachate, H2S can be removed totally from the biogas. Therefore, the application of FeCl3 for H2S removal in leachate treatment using the UASB reactor is very suitable and viable.
- 以成都市某生活垃圾填埋场渗滤液为研究对象, 采用UASB反应器对其进行处理. 由于渗滤液中的SO2-4被硫酸盐还原菌(SRB)转化成H2S, 会造成污染并对厌氧反应中的产甲烷菌(MPB)产生抑制作用, 因此添加FeCl3溶液对H2S进行去除. 实验结果表明, 该工艺运行效果良好. 随着进水负荷(OLR)的增加, COD去除率逐渐增加而硫酸盐去除率则缓慢下降, 当OLR高于7 kgCOD/(m3·d)时, 二者趋于稳定. 当系统达到设计负荷 9 kgCOD/(m3·d)时, COD和硫酸盐的去除率分别稳定在79%和91%, SRB所去除的COD(CODSRB)也由启动初期的8.9%下降到4.0%. 添加FeCl3后, COD去除率上升并稳定在83%, 而硫酸盐的去除率和CODSRB则分别进一步降为89%和1.89%. 质量平衡显示, FeCl3去除了近82%的硫, 并且当FeCl3用量达到l.6 g/L时, 产气中的H2S被完全去除. 因此, FeCl3用于去除UASB处理垃圾渗滤液过程中产生的H2S是切实可行的.
References:
[1] Lin C Y, Chang F Y, Chang C H. Co-digestion of leachate with septage using a UASB reactor [J]. Bioresource Technology, 2000, 73(2): 175-178.
[2] Jiménez-Rodríguez A M, Durán M M, Borja R, et al. Heavy metals removal from acid mine drainage water using biogenic hydrogen sulfide and effluent from anaerobic treatment: effect of pH [J]. Journal of Hazardous Materials, 2009, 165(1/2/3): 759-765.
[3] Nagpal S, Chuichulcherm S, Livingston A, et al. Ethanol utilization by sulfate-reducing bacteria: an experimental and modeling study [J]. Biotechnol Bioeng, 2000, 70(5): 533-543.
[4] De Lima A C F, Goncalves M M M, Granato M, et al. Anaerobic sulphate-reducing microbial process using UASB reactor for heavy metals decontamination [J]. Environ Technol, 2001, 22(3): 261-270.
[5] Truong L V A, Abatzoglou N. A H2S reactive adsorption process for the purification of biogas prior to its use as bioenergy vector [J]. Biomass and Bioenergy, 2005, 29(2): 142-151.
[6] Kapdi S S, Vijay V K, Rajesh S K, et al. Biogas scrubbing, compression and storage: perspective and prospectus in Indian context [J]. Renewable Energy, 2005, 30(8): 1195-1202.
[7] Pagella C, De Faveri D M. H2S gas treatment by iron bioprocess [J]. Chem Eng Sci, 2000, 55(12): 2185-2194.
[8] Ebrahimi S, Kleerebezem R, van Loosdrecht M C M, et al. Kinetics of the reactive absorption of hydrogen sulfide into aqueous ferric sulfate solutions [J]. Chem Eng Sci, 2003, 58(2): 417-427.
[9] Lar J S, Li X J. Removal of H2S during anaerobic bioconversion of dairy manure [J]. Chinese Journal of Chemical Engineering, 2009, 17(2): 273-277.
[10] Velasco A, Ramírez M, Volke-Sepúveda T, et al. Evaluation of feed COD/sulfate ratio as a control criterion for the biological hydrogen sulfide production and lead precipitation [J]. Journal of Hazardous Materials, 2008, 151(2/3): 407-413.
[11] APHA. Standard methods for the examination of water and wastewater [M]. 20th ed. Washington, DC, USA: American Public Health Association, 1998.
[12] Omil F, Méndez R, Lema J M. Anaerobic treatment of saline wastewaters under high sulfide and ammonia content [J]. Bioresource Technology, 1995, 54(3): 269-278.
[13] Stabnikov V P, Ivanov V N. The effect of various iron hydroxide concentrations on the anaerobic fermentation of sulfate-containing model wastewater [J]. Applied Biochemistry and Microbiology, 2006, 42(3): 284-288.
[14] Jeong T Y, Cha G C, Seo Y C, et al. Effect of COD/sulfate ratios on batch anaerobic digestion using waste activated sludge [J]. Journal of Industrial and Engineering Chemistry, 2008, 14(5): 693-697.
[15] Schomaker A. Anaerobic digestion of agro-industrial wastes: information networks—technical summary on gas treatment [R]. Canada: Report of AD-NETT project FAIR-CT96-2083(DG12-SSMI), 2000.
[16] Song Z, Williams C J, Edyvean R G J. Coagulation and anaerobic digestion of tannery wastewater [J]. Process Safety and Environmental Protection, 2001, 79(1): 23-28.
Memo
- Memo:
-
Biographies: Hua Jia(1970—), male, graduate; Zhang Linsheng(corresponding author), male, professor, zhanglinsheng@seu.edu.cn.
Citation: Hua Jia, Zhang Linsheng, Pan Yanli, et al. H2S removal in landfill leachate treatment using UASB reactor[J]. Journal of Southeast University(English Edition), 2010, 26(1): 91-95.