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Novel process for preparing carbon-based slow-release composite fertilizer from waste biomass

A technology of waste biomass and slow-release compound fertilizer, which can be used in calcium fertilizers, fertilization devices, inorganic fertilizers, etc., and can solve problems such as dealing with environmental pollution

Inactive Publication Date: 2018-09-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, my country produces a large amount of waste biomass such as straw, livestock and poultry manure, kitchen waste, etc. every year, and its untimely or incorrect treatment has caused serious environmental pollution.

Method used

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  • Novel process for preparing carbon-based slow-release composite fertilizer from waste biomass
  • Novel process for preparing carbon-based slow-release composite fertilizer from waste biomass
  • Novel process for preparing carbon-based slow-release composite fertilizer from waste biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of carbon-based compound fertilizer

[0024] The waste biomass was pig manure and corn stalks. The waste biomass was dried and crushed to less than 5mm, and set aside. Commercial compound fertilizer N:P:K=18:15:15; the basic properties of the test soil are as follows: TOC 11.76g / kg; TN 0.68g / kg; TP 0.39 g / kg; TK 17.63g / kg, pH 7.23.

[0025] 1) Mix biomass (dry basis) and water at a ratio of 1:5, and biomass (dry basis) and quicklime at a ratio of 1:5, and then put them into a hydrothermal reactor.

[0026] 2) Heating the reactor to 210°C and maintaining it for 60 minutes; then cooling by an electric fan and internal circulating cooling water, and then performing solid-liquid separation to obtain a solid product;

[0027] 3) The solid product and the compound fertilizer are mixed according to the ratio of 1:4 (the drying ratio is 0.65:4), mechanically stirred for 30 minutes, and then granulated with a disc granulator to 3-4mm and dried to obtain the carb...

Embodiment 2

[0035] Pig manure and wheat straw were used as waste biomass in the preparation of carbon-based slow-release compound fertilizer. Fully mix waste biomass, quicklime, water, and compound fertilizer according to the following proportions (the weight ratio of waste biomass dry basis weight to water is 1:10, the weight ratio of biomass dry basis weight to compound fertilizer is 1:5, waste The weight ratio of biomass dry basis weight and lime is 1:5), and carry out total hydrothermal treatment, hydrothermal treatment condition is identical with embodiment 1;

[0036] In the determination of slow-release compound fertilizer fertilizer efficiency, the application amount of slow-release compound fertilizer was changed to 320kg / hm 2 , the amount of compound fertilizer used in the comparison test was changed to 285kg / hm 2 Except, others are all identical with embodiment 1.

[0037] The effects of carbon-based slow-release compound fertilizers on wheat are shown in Table 2.

[0038] T...

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Abstract

At the aim of the situations of degraded soil fertility and low chemical fertilizer nutrient utilization rates in China, and with the combination of the advantage of rich waste biomass resources in China, the invention discloses a novel process for preparing a carbon-based slow-release composite fertilizer from waste biomass. The novel process specifically comprises the following steps: carrying out hydrothermal treatment on waste biomass under specific conditions, mixing the hydrothermal biomass with a composite fertilizer according to a certain ratio, or carrying out co-hydrothermal treatment on waste biomass and the composite fertilizer under specific conditions, and carrying out drying and pelletization. According to the novel process, the waste biomass is adopted as a raw material, sothat the carbon-based slow-release composite fertilizer prepared by using the process is low in price, and in addition, the carbon-based slow-release composite fertilizer has the advantages of beinghigh in fertilizer efficiency, high in nutrient utilization rate, good in soil repairing function, and the like.

Description

technical field [0001] The invention relates to the treatment and disposal of waste biomass, which belongs to the new technology of resource utilization of solid waste in the field of environmental protection and comprehensive utilization of resources, and is especially suitable for the high added value of waste biomass such as straw, livestock and poultry manure, kitchen waste, etc. resource utilization. Background technique [0002] my country's grain production has made great achievements, and the yield per unit area of ​​crops has increased steadily. In 1998, the total grain output reached 512 billion kilograms, achieving a basic balance between supply and demand. However, in the past 10 years, although the promotion of new varieties of high-yield and high-quality crops and the application of chemical fertilizers have been continuously increased, the crop yield has increased by less than 6%. Obviously, soil fertilizer has become an important factor restricting the furth...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/08C05G3/80C05G3/90
CPCC05D3/02C05G3/00C05G3/90C05G3/80C05G1/00C05F3/00C05F11/00
Inventor 刘振刚焦文涛李东
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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