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Effect of increasing salinity on biogas production in waste landfills with leachate recirculation: A lab-scale model study

机译:盐分增加对垃圾渗滤液垃圾填埋场沼气生产的影响:实验室规模的模型研究

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摘要

The effects of salinity on anaerobic waste degradation and microbial communities were investigated, in order to propose an appropriate leachate recirculation process in a waste landfill in a tropical region. A salt concentration of 21 mS cm−1 of electrical conductivity (EC) did not affect waste degradation, but a salt concentration of 35 mS cm−1 of EC inhibited CH4 generation. A higher salt concentration of 80 mS cm−1 of EC inhibited not only CH4 and CO2 generation, but also degradation of organic compounds. The bacterial and archaeal community compositions were affected by high salinity. High salinity can exert selective pressure on bacterial communities, resulting in a change in bacterial community structure. Ammonium caused strong, dominant inhibition of biogas production in the salt concentration range of this study. Quality control, especially of ammonium levels, will be essential for the promotion of waste biodegradation in landfills with leachate recirculation.
机译:研究了盐度对厌氧废物降解和微生物群落的影响,以提出热带地区垃圾填埋场中适当的渗滤液再循环过程。盐浓度为21 mS·cm -1 的电导率(EC)不会影响废物降解,但是盐浓度为35 mS·cm -1 的EC会抑制CH4的产生。较高的EC盐浓度为80 mS·cm -1 不仅抑制了CH4和CO2的生成,而且还抑制了有机化合物的降解。细菌和古细菌群落组成受高盐度影响。高盐度可以对细菌群落施加选择性压力,从而导致细菌群落结构发生变化。在本研究的盐浓度范围内,铵盐对沼气的产生具有强烈的显着抑制作用。质量控制,尤其是铵含量的质量控制,对于促进渗滤液再循环的垃圾填埋场中废物的生物降解至关重要。

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