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Method for preparing matrix of raw winter vegetables with municipal sludge

A technology of municipal sludge and matrix, applied in the biological field, can solve the problems of municipal sludge and achieve the effects of improving absorption and utilization, simple preparation process, and reducing heating and fermentation time

Active Publication Date: 2014-06-04
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the gaps in the prior art and provide a method for preparing winter vegetable substrates from urban sludge, which not only effectively solves the problem of urban sludge, but also provides an efficient method for the growth of winter vegetables Nutrient matrix

Method used

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preparation example Construction

[0033] The preparation method of microbial fermentation agent described in step 3 comprises the following steps:

[0034] Step 1, preparation of soybean extract

[0035] (1) Wash the soybeans, dry them, crush them, and then filter them through a 1mm-diameter sieve to obtain soybean powder for later use;

[0036] (2) Add soybean powder into a phosphate buffer solution with a pH of 5.2 and a molar concentration of 0.05 mol / L, stir evenly to obtain a mixed solution I, and the volume of the phosphate buffer solution corresponding to each gram of soybean powder is 10 mL;

[0037] (3) Put the mixture I prepared in step (2) into a centrifuge with a rotation speed of 6000r / min for 30min, and then dissolve the precipitate in a phosphate buffer solution with a pH of 6.5 and a molar concentration of 0.05mol / L In, then transferred to a centrifuge with a rotating speed of 4000r / min for 15min, the supernatant was collected, and the soybean extract was prepared for subsequent use;

[0038]...

Embodiment 1

[0042] A kind of method utilizing city sludge to prepare winter raw vegetable matrix, comprises the following steps:

[0043] Step 1: Add 0.7 mol / L acetic acid and rotten citrus to the urban sludge, stir evenly, and then treat it with an ultrasonic wave with a frequency of 20kHz for 25 minutes, air-dry to obtain the matrix I, and add The quality of acetic acid and orange is respectively 32g, 34g;

[0044] Step 2: Crush the wheat straw and the air-dried matrix I, and filter them through a sieve with a pore size of 1-2 mm, mix the filtered wheat straw and matrix I at a mass ratio of 4:1, and stir evenly to obtain Matrix II, spare;

[0045] Step 3, add water to the matrix II, so that the mass percentage concentration of water in the matrix II is 68-72%, and then add the microbial starter to the matrix II, and the ratio of the matrix II to the microbial starter is 5:1, and mix The unit of matrix I is m 3 , the unit of the microbial fermentation agent is kg, and the substrate II...

Embodiment 2

[0058] A kind of method utilizing city sludge to prepare winter raw vegetable matrix, comprises the following steps:

[0059] Step 1: Add 0.7 mol / L acetic acid and rotten citrus to the urban sludge, stir evenly, and then treat it with an ultrasonic wave with a frequency of 20kHz for 25 minutes, air-dry to obtain the matrix I, and add The quality of acetic acid and orange is respectively 32g, 34g;

[0060] Step 2: Crush the wheat straw and the air-dried matrix I, and filter them through a sieve with a pore size of 2 mm, mix the filtered wheat straw and matrix I at a mass ratio of 4:1, and mix well to obtain matrix II ,spare;

[0061] Step 3, add water to the matrix II, so that the mass percentage concentration of water in the matrix II is 68-72%, and then add the microbial starter to the matrix II, and the ratio of the matrix II to the microbial starter is 5:1, and mix The unit of matrix I is m 3 , the unit of the microbial fermentation agent is kg, and the substrate III is ...

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Abstract

The invention belongs to the field of biological technologies, and particularly relates to a method for preparing a matrix of raw winter vegetables with municipal sludge. According to the method, acetic acid and rotten oranges are added into the municipal sludge, and then, the municipal sludge is treated by ultrasonic so as to effectively remove heavy metals in the municipal sludge, thus guaranteeing the vegetables to be eaten safely. The method uses rotten oranges, thus playing the effect of turning waste into wealth, removing the heavy metals and solving the problem of environment pollution caused by the rotten oranges. A leavening agent with soybean extractive is used for fermenting, thus greatly lowering the fermentation time and temperature rising time of wheat straw and municipal sludge, improving absorption and utilization of the leavening agent by the fermentation matrix, enriching the nutritional ingredients after fermentation, and improving the work efficiency. The soybean extractive is firstly treated by ultrasonic and then is mixed with a complex liquid, so that the ingredients in the complex liquid and the soybean extractive are uniformly mixed, and the absorption and utilization ratio of the leavening agent by the municipal sludge and straw is improved.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for preparing winter raw vegetable matrix by using urban sludge. Background technique [0002] The dewatered sludge of urban sewage plants is the solid waste generated from the treatment of wastewater in urban sewage plants. With the increase in the number of sewage plants under construction in my country, the sludge output will still increase. Municipal sludge contains a large amount of organic matter and nutrients such as N, P and K needed by plants. Composting and using it as a vegetable substrate is an effective way to achieve the reduction, harmlessness and resource utilization of such solid waste. [0003] However, urban sludge contains heavy metals, which is not conducive to the growth of vegetables, and it usually takes 30 days to ferment once using the forced ventilation aerobic static composting method, which has the disadvantages of long fermentation ...

Claims

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Application Information

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IPC IPC(8): C05F7/00C05F11/08
CPCY02A40/20
Inventor 常会庆王发园郭大勇王浩高晓凯
Owner HENAN UNIV OF SCI & TECH
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