Sludge-derived saline-alkali soil remediation agent as well as preparation method and application thereof

A soil remediation agent and a technology for saline-alkali soil, which are applied in the field of saline-alkali soil remediation agents to achieve the effects of improving air permeability, increasing total nitrogen content, and reducing salt content

Inactive Publication Date: 2017-06-20
北京绿安创华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Sludge saline-alkali soil remediation agent In order to overcome the difficulty of existing sludge digestion, the sludge saline-alkali soil remediation agent of the pr

Method used

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  • Sludge-derived saline-alkali soil remediation agent as well as preparation method and application thereof
  • Sludge-derived saline-alkali soil remediation agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 A kind of preparation method of sludge soil remediation agent

[0046] 1. Pretreatment of sludge raw materials

[0047] Sampling and analysis of dewatered sludge from a sewage plant (domestic sewage) in Beijing. The basic properties of the sludge are: moisture content 78.9%, total organic matter 540g / kgDM, water-soluble total nitrogen 3.1g / kgDM, coliform bacteria Value > 23,000 MPN / kgDM. The above-mentioned dehydrated domestic sludge is stacked and dried in the drying yard for 10 to 15 days, and a chemical deodorant can be added appropriately. Initially reduce the odor, and reduce the water content to below 40%, which is beneficial to the subsequent operation. Add to the lumpy sludge after drying: 10-15kg of crushed straw, 10-20kg of fermented pig manure, 10-20kg of humus, 15-30kg of compound fertilizer, amino acid 3-8 kg, the compound fertilizer includes potassium fertilizer, nitrogen fertilizer and phosphorus fertilizer, and the parts by weight are res...

Embodiment 2

[0064] Embodiment 2 A kind of preparation method of sludge soil remediation agent

[0065] 1. Pretreatment of sludge raw materials

[0066] Operated according to the method of Example 1, the difference is that the agricultural production waste after the pulverization is a mixture of corn flour, rice bran, soybean meal, and straw;

[0067] The organic fertilizer is a mixture of biogas manure and fermented pig manure.

[0068] 2. Preparation of composite microbial agent

[0069] Operated according to the method of Example 1, the difference is that Bacillus stearothermophilus, Geobacillus stearothermophilus, Streptococcus thermophilus (all being common commercial bacterial agents), the ratio of the above three bacteria is: 1: 1:3.

[0070] 3. Fermentation of compound microbial agent

[0071] Operate according to the method of embodiment 1.

[0072] 4. Secondary fermentation

[0073] Operate according to the method of Example 1, but the secondary fermentation compound bacter...

Embodiment 3

[0075] Embodiment 3 A kind of preparation method of sludge soil remediation agent

[0076] 1. Pretreatment of sludge raw materials

[0077] Operate according to the method of embodiment 1.

[0078] 2. Preparation of composite microbial agent

[0079] Operate according to the method of embodiment 1, difference is to have used Bacillus stearothermophilus bacterial agent, Streptococcus thermophilus bacterial agent, Myceliophthora thermophilic bacterial agent, Candida tropicalis bacterial agent and Lactobacillus delbrueckii bacterial agent, above-mentioned five The ratio of inoculum is 1:2:1:3:5.

[0080] 3. Fermentation of compound microbial agent

[0081] Operate according to the method of embodiment 1.

[0082] 4. Secondary fermentation

[0083] Operate according to the method of Example 1, but the microbial bacterial agent is Lactobacillus plantarum, Trichoderma reesei, Lactobacillus delbrueckii, Micrococcus methanethermophilus with a mass ratio of 2:5:7:6:1:3:4 , metalo...

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Abstract

The invention provides a sludge-derived soil remediation agent as well as a preparation method and application thereof in sludge digestion. According to the adopted technical scheme, pretreatment is carried out on urban sewage and sludge, and the sludge is treated by means of twice fermentation. Tests prove that after the sludge remediation agent is used for 20 days, the proportional effective removal rate of various pollutants in soil reaches 95% or more and is in line with national standards. Furthermore, a sulfuric acid substance can acidify the hardened saline-alkali soil and is also good organic fertilizer, thus beneficial to reduction of the use of chemical reagents and chemical fertilizer in agricultural production, and putting an end to pollution and secondary pollution from the source.

Description

technical field [0001] The invention relates to a saline-alkali soil remediation agent derived from sludge, in particular to a method for preparing a saline-alkali soil remediation agent by treating sludge with microorganisms, the obtained saline-alkali soil remediation agent, and its use in sludge digestion Applications. Background technique [0002] With the acceleration of urbanization in my country, the amount of urban sewage treatment is also increasing. Sludge is an accompanying organism of sewage treatment, usually accounting for 0.5--1% of the sewage treatment volume. Due to its complex composition, it contains not only a large amount of organic matter, but also contains pathogenic microorganisms, heavy metals, etc. Form "secondary pollution". Therefore, how to safely, economically and rationally dispose and utilize sludge from sewage treatment plants has always been a research topic of great concern to countries all over the world. It has been found through resea...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/04C09K101/00C05G3/80
CPCB09C1/08B09C1/10B09C2101/00C09K17/40C09K2101/00C05G3/80
Inventor 王锋梁琳琳谢英轩
Owner 北京绿安创华环保科技有限公司
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