Biogas slurry concentrate and engineering preparation method

A technology of concentrated liquid and biogas liquid, which is applied in the field of resource utilization of biogas liquid, can solve problems such as difficult engineering and stable operation, inability to concentrate at a high rate, and easy clogging of the membrane, so as to improve the value of use, reduce the number of cleaning times of the membrane, and avoid damage Effect

Active Publication Date: 2014-09-24
SHANDONG MINHE BIOTECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the characteristics of rich and balanced nutritional components of chicken manure biogas liquid itself, but large volume, many impurities and high viscosity, the present invention develops biogas liquid concentrate products in a differentiated manner, and aims at the existing biogas liquid membrane concentration technology that is easy to block and damage the membrane Serious, incapable of high-power concentration, and difficult to engineer stable operation, provide a biogas slurry concentrate and its engineering preparation method

Method used

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  • Biogas slurry concentrate and engineering preparation method
  • Biogas slurry concentrate and engineering preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of biogas slurry concentrate comprises the following steps:

[0031] A. The raw biogas slurry is transported to the regulating tank, and is subjected to sedimentation and filtration to remove sand and impurities;

[0032] B. Transport the above-mentioned preliminary treated biogas slurry to the acidification hydrolysis tank for acidification and hydrolysis, and decompose the macromolecules in the original biogas slurry by controlling the amount of air and temperature and further precipitating and removing impurities;

[0033] C. The hydrolyzed biogas slurry is transported to the ultrafiltration raw material tank, first filtered through a precision filter, and then subjected to ultrafiltration treatment with an ultrafiltration membrane. The ultrafiltration membrane adopts an inorganic ceramic membrane with a pore size of 100-200nm. The flux is 60-65L / m 2 .h, the transmembrane pressure difference is 2010-0.20MPa, to obtain the ultrafiltration...

Embodiment 2

[0042] Test method: This test is carried out in a pilot plant. The raw biogas slurry after fermentation is continuous and stable, so as to ensure that the test effect is not affected by the material itself. The raw biogas slurry without pre-membrane pretreatment and the raw biogas slurry with pre-membrane pretreatment passed through the ultrafiltration membrane of the same pilot plant, and the membrane flux was measured every 10 minutes, and 7 sets of data were obtained respectively, and the measurement was carried out continuously for 3 days . The data statistics are shown in Table 1-3 below:

[0043] Table 1. Membrane flux on the first day

[0044]

[0045]

[0046] Table 2. Membrane flux on the second day

[0047]

[0048] Table 3. Membrane flux on the third day

[0049]

[0050] The results show that the addition of pre-membrane pretreatment processes, including precipitation, filtration, and acidification hydrolysis processes, facilitates the subsequent mem...

Embodiment 3

[0052] Test site: Vegetable Test Base in Muping District

[0053] Soil for testing: All soil types are brown soil with good irrigation and drainage conditions.

[0054] The soil conditions are as follows:

[0055] Table 4. Soil nutrient status of the test field

[0056]

[0057] Fertilizer for test: biogas slurry concentrate

[0058] Test varieties and cultivation methods

[0059] Celery, a variety of glass green, transplanted for seedling cultivation, and planted in borders after planting.

[0060] experiment method:

[0061] Three treatments were set up in the experiment, repeated three times, and the plot area was 20 square meters.

[0062] Treatment 1: Regular fertilization

[0063] Treatment 2: conventional fertilization + equal amount of water

[0064] Treatment 3: conventional fertilization + biogas slurry concentrate

[0065] Table 5. Celery yield result table

[0066]

[0067] Experimental results:

[0068] Field observation showed that treatment 3 spray...

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Abstract

The invention relates to a biogas slurry concentrate and an engineering preparation method, which belongs to the technical field of biogas slurry resource utilization. The method comprises the following steps: pretreating a membrane of a chicken manure biogas slurry, passing the pretreated biogas slurry through an ultrafilter membrane of an inorganic ceramic membrane for filtering impurity, passing through a nanofiltration membrane and a reverse osmosis membrane for interception and condensation, and final removing solid insoluble particles in the biogas slurry, the macro-molecule substance which is difficult to be absorbed by the crops, high power concentrated biogas slurry organic micromolecule nutrients. The method overcomes of disadvantages of easy membrane obstruction, severe damage, difficult high power condensation, difficult engineering stable operation in prior art, the obtained biogas slurry concentrate finished product is nano level organic state micromolecule substance, has the advantages of comprehensive and balanced nutrition, good water solubility, strong permeability, high activity, and high practical application value.

Description

technical field [0001] The invention belongs to the technical field of biogas slurry resource utilization, and in particular relates to a concentrated biogas slurry and an engineering preparation method thereof. Background technique [0002] Biogas slurry is an excellent organic fertilizer, which is easy to be absorbed by plants, and has both quick-acting and slow-acting properties. Studies have shown that compared with biogas slurry from other raw materials, chicken manure biogas slurry has more comprehensive nutrients, containing nitrogen, phosphorus, potassium, amino acids, protein, calcium, boron, selenium, zinc, vitamins, auxin, gibberellin, sugars, Nucleic acid, butyric acid, acetic acid, vitamin B12 and other nutrients that are beneficial to plant growth have the effects of making crops grow robustly, leaves thicker, and improving the quality of fruits and vegetables. [0003] With the increase in the number of large and medium-sized biogas projects in China, the amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F7/00C02F9/14
CPCY02A40/20Y02E50/30Y02W30/40
Inventor 董泰丽李朋牛希成张圣仓金尧
Owner SHANDONG MINHE BIOTECHNOLOGY CO LTD
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