摘要
本研究针对目前大中型沼气工程发酵残留物大部分没有利用,被随意排放到环境中,成为农村环境污染重要来源的现状,采用三级过滤相关工艺对沼液进行过滤,并达到120目滴灌要求,从而利用滴灌措施实现沼液的资源化循环利用。工艺中采用曝气和反冲洗等技术手段,实现沼液的无堵塞过滤。对过滤后的沼液进行了相关分析,研究发现,采用本项技术可以实现沼液与水的精确化配比,但沼液相比未过滤前的原液养分有3.4%～9.8%的损失,这可能和本项技术过滤掉了沼液中的悬浮物有关。通过沼液滴灌技术完善了以沼气为纽带的"养殖业-沼气-种植业"的循环农业发展模式,具有广阔的应用前景。
The biogas fermentation residues from biogas station had become an important pollution resources due to non-use and freely-discard.A technics with three filtration was applied to treat the biogas slurry and make the slurry to suit the drip irrigation systems and reach 120 mesh drip irrigation requirements,so that the slurry can be safely reused to agriculture land.And the Aeration and Back-washing technics were applied in the filtration system for reaching a non-blocking target.The results showed that the biogas slurry and water can be mixed in an accurate ratio in this filtration system.And the nutrient in biogas slurry decreased 3.4%～9.8% after filtration compared to the original,that may because some suspended solids were lost during the filtration.This technics improved the agriculture cycling mode of ＂animal husbandry-biogas plant-crop cultivation＂.
出处
《中国沼气》
2011年第3期24-27,共4页
China Biogas
基金
北京市农林科学院青年基金(QNJJ201016)
科技部科技人员服务企业行动项目(2009GJA00013)
关键词
沼液
滴灌
曝气
反冲洗
biogas slurry
drip irrigation
aeration
back-washing
