一种用于畜禽养殖厌氧发酵后沼液预处理的模块滤池

文档序号:916536 发布日期:2021-03-02 浏览:12次 >En<

阅读说明:本技术 一种用于畜禽养殖厌氧发酵后沼液预处理的模块滤池 (Modular filter tank for biogas slurry pretreatment after anaerobic fermentation of livestock and poultry breeding ) 是由 肖利平 陈新源 邓志毅 雷雨田 杨浩宇 于 2020-09-29 设计创作,主要内容包括:畜禽养殖粪污经厌氧发酵后沼液中有机悬浮物含量高且细小,现有固液分离机难以分离;但若不及时分离,会严重影响后续生物处理,导致效果差,因此,实现沼液中细小悬浮物的有效分离,是保障处理达标的关键。目前规模化养殖场采用混凝气浮或过滤等预处理技术来去除,有投入大、成本高、能耗高等缺陷。本发明利用深层过滤的原理,设计了一种新型模块滤池。该滤池是将传统普通快滤池模块化,整个滤池由1~n个滤块组成,以谷壳、秸秆等为滤料,每个滤块为活动件,可独立拆装,方便更换滤料,不需反冲洗系统,具有能耗低、灵活性高等优点;在保证处理效果前提下,大幅降低能耗,且能回收有机悬浮物作为有机农肥。目前有关该滤池的设计尚未见相关报道。(After anaerobic fermentation, the livestock and poultry breeding manure has high and fine organic suspended matter content in the biogas slurry, and the existing solid-liquid separator is difficult to separate; but if the separation is not carried out in time, the subsequent biological treatment can be seriously influenced, and the effect is poor, so that the effective separation of fine suspended matters in the biogas slurry is realized, and the key for ensuring the standard reaching of the treatment is realized. At present, the large-scale farm adopts pretreatment technologies such as coagulation air flotation or filtration to remove the impurities, and has the defects of large investment, high cost, high energy consumption and the like. The invention designs a novel modular filter tank by utilizing the principle of deep filtration. The filter tank is formed by modularizing a traditional common quick filter tank, the whole filter tank consists of 1-n filter blocks, chaff, straws and the like are used as filter materials, each filter block is a movable part, and the filter tank can be independently assembled and disassembled, is convenient to replace the filter materials, does not need a back flushing system, and has the advantages of low energy consumption, high flexibility and the like; on the premise of ensuring the treatment effect, the energy consumption is greatly reduced, and the organic suspended matters can be recovered to be used as organic agricultural fertilizers. At present, no relevant report is found about the design of the filter.)

一种用于畜禽养殖厌氧发酵后沼液预处理的模块滤池

技术领域

本发明属于养殖废水污染处理及防治领域,具体涉及一种用于畜禽养殖废水处理的模块滤池。

背景技术

畜禽养殖场排出的废水中悬浮物浓度较高,特别是通过厌氧发酵后的沼液中有机悬浮物含量高且非常细小,难以通过现有的固液分离机分离;但若不及时分离,会严重影响沼液的后续生物处理,导致生物处理系统极不稳定且处理效果差,因此,实现养殖废水中细小悬浮物的有效分离,是保障这类废水处理达标的关键。

目前大部分规模化的畜禽养殖场都采用混凝沉淀或气浮预处理技术来去除这部分细小的悬浮物。但该方法存在着药剂用量大,运行成本高、废渣产生量大,且会降低有机悬浮物的肥分等缺陷;也有部分畜禽养殖场采用带式压滤机或离心过滤机过滤的方式分离这些有机悬浮物,但存在着建设投入大、能耗高、运行管理复杂等不利因素。利用深层过滤技术能有效截留细小的悬浮物,且不会破坏有机悬浮物的肥分,但传统的快滤池需要庞大而复杂的反冲洗系统,导致能耗大、设备繁多、系统复杂,限制了该技术的应用。鉴于此,在充分利用滤池截留细小悬浮物的能力上,考虑设计一种系统操作简单、能耗低且能回收这些悬浮物作为有机农肥的新型滤池有广阔的应用前景。

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