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 sl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] The preparation method of the microbial starter described in step 3 includes the following steps:

[0034] Step 1. Preparation of soybean extract

[0035] (1) Wash the soybeans, dry them, smash them, and filter them with a screen with a diameter of 1 mm to obtain soybean powder for use;

[0036] (2) Add soybean powder to a phosphate buffer with a pH of 5.2 and a molar concentration of 0.05 mol / L, and stir well to prepare a mixed solution I. The volume of phosphate buffer 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 and centrifuge for 30 minutes, and then dissolve the precipitate in a phosphate buffer with a pH of 6.5 and a molar concentration of 0.05mol / L Then transfer to a centrifuge with a speed of 4000r / min and centrifuge for 15 minutes, collect the supernatant, and prepare the soybean extract for use;

[0038] Step 2: Weigh each component according to the weight...

Example Embodiment

[0041] Example 1

[0042] A method for preparing a winter raw vegetable substrate using municipal sludge includes the following steps:

[0043] Step 1. Add acetic acid with a molar concentration of 0.7 mol / L and rotten citrus to the municipal sludge, stir evenly, treat with 20kHz ultrasonic waves for 25 minutes, and air-dry to obtain the substrate I, which is added per liter of municipal sludge The masses of acetic acid and citrus are 32g and 34g respectively;

[0044] Step 2. Grind the wheat straw and the air-dried substrate I, and filter them with a sieve with a pore size of 1-2 mm. Mix the filtered wheat straw and the substrate I in a 4:1 mass ratio, and mix them evenly. Matrix II, spare;

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

Example Embodiment

[0057] Example 2

[0058] A method for preparing a winter raw vegetable substrate using municipal sludge includes the following steps:

[0059] Step 1. Add acetic acid with a molar concentration of 0.7 mol / L and rotten citrus to the municipal sludge, stir evenly, treat with 20kHz ultrasonic waves for 25 minutes, and air-dry to obtain the substrate I, which is added per liter of municipal sludge The masses of acetic acid and citrus are 32g and 34g respectively;

[0060] Step 2. Grind the wheat straw and the air-dried substrate I, and filter them with a 2mm sieve. The filtered wheat straw and the substrate I are mixed according to the mass ratio of 4:1, and the substrate II is obtained after stirring. ,spare;

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

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PUM

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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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