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Method of preparing substrate for summer vegetables by utilization of 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 promoting growth, improving absorption and utilization, reducing heating and fermentation time

Active Publication Date: 2014-05-28
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 summer 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 summer vegetables Nutrient matrix

Method used

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preparation example Construction

[0036] The preparation method of microbial fermentation agent described in step 4 comprises the following steps:

[0037] Step 1, preparation of soybean extract

[0038](1) Wash the soybeans, dry them, crush them, and then filter them through a 1mm-diameter sieve to obtain soybean powder for later use;

[0039] (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;

[0040] (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;

[0041] ...

Embodiment 1

[0045] A kind of method that utilizes city sludge to prepare summer raw vegetable matrix, comprises the following steps:

[0046] 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;

[0047] Step 2, put the substrate I into an oven and heat until the temperature of the substrate I is 60°C;

[0048] Step 3: Crush the corn stalks and the heated substrate I, and filter them through a sieve with a pore size of 1-2 mm, mix the filtered corn stalks and the substrate I in a mass ratio of 4:1, and stir evenly to obtain Matrix II, spare;

[0049] Step 4, add water to the matrix II, so that the mass percentage concentration of water in the matrix II is 68-72%, then add the microbial starter to the matrix II, and the ratio of the matrix II to the microbial starter is ...

Embodiment 2

[0063] A kind of method that utilizes city sludge to prepare summer raw vegetable matrix, comprises the following steps:

[0064] 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;

[0065] Step 2, put the substrate I into an oven and heat until the temperature of the substrate I is 65°C;

[0066] Step 3: Crush the corn stalks and the heated matrix I, and filter them through a sieve with a pore size of 2 mm, mix the filtered corn straw and the matrix I in a mass ratio of 4:1, and mix well to prepare the matrix II ,spare;

[0067] Step 4, add water to the matrix II, so that the mass percentage concentration of water in the matrix II is 68-72%, then add the microbial starter to the matrix II, and the ratio of the matrix II to the microbial starter is 5:1, an...

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Abstract

The invention belongs to the biotechnology field, and particularly relates to a method of preparing a substrate for summer vegetables by utilization of municipal sludge. Aiming at problems of many harmful bacteria and easy diseases of summer vegetables, the municipal sludge is heated to 60-65 DEG C so as to effectively remove some germs in the sludge, and adjuvants are added into the substrate after fermentation is finished, thus inhibiting the harmful bacteria and promoting growth of the summer vegetables. The adjuvants are free of pollution to the environment and free of toxicity and position. Acetic acid and decayed oranges are added into the municipal sludge, and then the municipal sludge is subjected to ultrasonic treatment, thus effectively removing heavy metals in the municipal sludge and providing guarantee for eating safety of the vegetables. The decayed oranges are adopted, thus changing waste materials into things of value and solving an environment pollution problem of the decayed oranges at the same time of removing the heavy metal. A fermentation agent containing soybean extract is added to perform fermentation so as to enhance absorption and utilization of the fermentation agent by a fermentation substrate.

Description

technical field [0001] The invention belongs to the field of biotechnology, and in particular relates to a method for preparing summer raw vegetable substrates from 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, and vegetables are susceptible to pests and diseases in summer. And it can usually be realized by forced ventilation aerobic static composting method, but one fermentation basically takes 30 days, and there a...

Claims

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Application Information

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IPC IPC(8): C05F7/00C05F11/08
CPCY02A40/20
Inventor 常会庆郭大勇徐晓峰徐艳珍王世华
Owner HENAN UNIV OF SCI & TECH
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