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Method and equipment for producing organic liquid fertilizer with biogas slurry

A technology for organic liquid fertilizer and biogas slurry, which is applied in the treatment and application of organic fertilizers and bio-organic parts, can solve the problems of low content of active components in biogas slurry, ineffective utilization of biogas slurry, and high cost of long-distance transportation. The effect of distance transportation and sales, realizing high value-added utilization, and significant economic benefits

Inactive Publication Date: 2009-04-08
SOUNDGRP CO LTD
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Problems solved by technology

[0004] The content of active ingredients in biogas slurry is relatively low, and the amount of application per unit area is relatively large, resulting in high long-distance transportation costs
At present, the utilization of biogas slurry is mainly limited to the range close to the anaerobic fermentation plant, so that the biogas slurry cannot be effectively used in a wider range, and even waste may occur.

Method used

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  • Method and equipment for producing organic liquid fertilizer with biogas slurry
  • Method and equipment for producing organic liquid fertilizer with biogas slurry

Examples

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Embodiment 1

[0030] This example provides a method for preparing organic liquid fertilizer from biogas slurry, which mainly uses membrane separation technology to filter and concentrate biogas slurry to prepare high-efficiency organic liquid fertilizer. The process of this method is as follows figure 1 shown, including:

[0031] a. Micro-flocculation treatment: adding a coagulant to the biogas slurry for micro-flocculation treatment, so that the particles, colloidal substances and partially dissolved organic matter in the biogas slurry can form tiny flocs, wherein the coagulant is iron salt or Aluminum salt, online dosing, the dosage is 20-60mg / L;

[0032] b. Microfiltration treatment: carry out continuous microfiltration treatment on the biogas slurry after the microflocculation treatment, the permeate of the microfiltration treatment enters the subsequent treatment, and the microfiltration treatment is carried out again after the concentrated solution is refluxed; the microfiltration tre...

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Abstract

The invention discloses a method and a device for preparing organic liquid fertilizer from biogas fermentation slurry. The method comprises six operation steps: micro-flocculation treatment, continuous micro-filtration treatment, nano-filtration treatment, nutrition deployment treatment, disinfection treatment, and package treatment. The method has simple process, can concentrate active ingredients in common biogas fermentation slurry by 3 to 4 times, supplement certain useful ingredients according to different use objects simultaneously to prepare the common biogas fermentation slurry into highly-efficient organic liquid fertilizer products, thus the method and the device can achieve the high utilization of the added value of the biogas fermentation slurry and create significant economic benefits.

Description

technical field [0001] The invention relates to a biogas slurry utilization technology, in particular to a method and equipment for preparing high-efficiency organic liquid fertilizer after concentrating the biogas slurry by adopting membrane separation technology, and belongs to the fields of waste resource utilization and fertilizer preparation. Background technique [0002] The use of anaerobic fermentation technology to treat biomass organic waste can not only realize the harmless treatment of waste, but also recover useful substances. For example, the generated biogas can be used for power generation, heating, lighting, etc., and the digested residue and biogas slurry are High-quality organic fertilizers can be applied to farmland to improve soil and increase fertilizer efficiency. [0003] Biogas slurry is a liquid by-product produced during the anaerobic fermentation of organic waste. It not only contains abundant macronutrients such as nitrogen, phosphorus, potassium...

Claims

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Application Information

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IPC IPC(8): C05F7/00
CPCY02A40/20Y02E50/30Y02W30/40
Inventor 申欢文一波王凯李天增宁桂兴
Owner SOUNDGRP CO LTD
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