基于分级过滤的喷灌用沼液颗粒物组成分析

发布时间：2018-01-16 11:40

本文关键词：基于分级过滤的喷灌用沼液颗粒物组成分析　出处：《农业工程学报》2016年08期 　论文类型：期刊论文

【摘要】：弄清沼液颗粒物组成,对于解决沼液过滤难题、实现沼液大规模应用至关重要。该研究采用分级过滤方法,分析规模猪场沼气发酵工程产生的沼液中颗粒物组成,结果表明:80目和100目筛网过滤出的颗粒物中观察到有菌丝的存在,且在过滤出的颗粒物中以80目筛网过滤出的颗粒物所占比例最多,这可能是采用小孔径筛网过滤沼液易发生堵塞的主要原因。部分大于滤网孔径尺寸的颗粒物或菌丝也可通过滤网进入管道,存在进一步堵塞管道的风险。在沼液贮放深度为1 m的条件下,静置3 d,沼液中颗粒物主要集中在70~100 cm的下层,不同深度沼液层总氮、总钾、化学需氧量等指标均无显著差异。综合颗粒物数量、大小和形态等因素,认为60目是沼液过滤防堵较为适宜的孔径;同时应适当加大喷灌管道的喷灌口大小,防止沼液在后续喷灌时发生堵塞。该研究为规模化、高效化沼液利用工程建立提供了参考。
[Abstract]:In order to solve the problem of biogas filtration and realize the large-scale application of biogas liquid, it is very important to make clear the composition of particulate matter in biogas liquid. The composition of particulate matter in biogas liquid produced by biogas fermentation project of pig farm was analyzed. The results showed that mycelium was observed in the particulate matter filtered out of the sieve of 80 and 100 mesh. Among the particles filtered out, 80 mesh screen was the most important one. This may be the main reason for the blockage of biogas liquid filtered with small aperture sieve. Some particles or mycelium larger than the pore size of the filter can also enter the pipeline through the filter net. There is the risk of further blockage of the pipe. Under the condition of the storage depth of biogas liquid is 1 m, the particles in the biogas liquid are mainly concentrated in the lower layer of 70 ~ 100 cm, and the total nitrogen in the different depth of the biogas liquid layer is mainly concentrated for 3 days. There was no significant difference in total potassium and chemical oxygen demand. Considering the quantity, size and shape of particulate matter, it was considered that 60 mesh was the most suitable pore size for biogas liquid filtration. At the same time, the size of sprinkler nozzle of sprinkler irrigation pipeline should be increased appropriately to prevent the blockage of biogas liquid during subsequent sprinkler irrigation. This study provides a reference for the establishment of large-scale and high-efficiency biogas liquid utilization engineering.
【作者单位】：江苏省农业科学院农业资源与环境研究所;
【基金】：公益性行业(农业)科研专项项目(201203050-2) 国家支撑计划项目(2012BAD14B12) 江苏省农业科技自主创新资金项目(CX(14)2106)
【分类号】：X713
【正文快照】： 盛婧,徐乔,朱普平,孙国峰,张丽萍,郑建初.基于分级过滤的喷灌用沼液颗粒物组成分析[J].农业工程学报,2016,32(8):212-216.doi:10.11975/j.issn.1002-6819.2016.08.030 http://www.tcsae.orgSheng Jing,Xu Qiao,Zhu Puping,Sun Guofeng,Zhang Liping,Zhen Jianchu.Composition

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