Method for preparing liquid biofertilizer through organic waste liquid

Abstract

The invention discloses a method for preparing liquid biofertilizer through organic waste liquid. The method comprises the following steps: A, primary fermentation; B, high-order oxidation treatment: performing high-order full oxidation treatment on the primary fermentation liquid obtained in the step A through the high-voltage pulse liquid discharge and plasma discharge technologies to prepare a high-activity treating liquid; C, secondary fermentation: supplementing a sufficient silicon source and inorganic nutrients in the high-activity treating liquid obtained in the step B, inoculating a compound microbial agent into the treating liquid to perform secondary fermentation cultivation to prepare a biological bacterium liquid; D, nutrition complexing and mixing: adding a plant growth nutrient and an accelerating agent into the biological bacterium liquid obtained in the step C to prepare the efficient liquid microbe fertilizer. According to the method, complete innocent treatment of the organic waste liquid is realized, and meanwhile, the fertility utilization rate of the organic waste liquid is greatly increased.

Description

technical field [0001] The invention relates to a method for resource utilization of organic waste liquid, in particular to a method for preparing high-efficiency liquid biological fertilizer by using biogas slurry. Background technique [0002] Currently, there are several types of methods involving the production of liquid fertilizers from organic waste liquids: [0003] The first one, the Chinese patent "Method for Producing Organic Liquid Fertilizer Base Liquid with High Physiological Activity Using High-Concentration Organic Wastewater" published on August 22, 2012, application number 201210103531.4, and some other patents propose to use acid or alkali to treat waste liquid After hydrolysis, use alkali or acid for acid-base neutralization to adjust the pH value, and then add nutrients such as nitrogen, phosphorus, and potassium to make liquid fertilizers. The shortcomings of this type of method are: 1. Adding acid or alkali in production kills both harmful bacteria and...

AI Technical Summary

Problems solved by technology

The shortcomings of this type of method are: 1. Adding acid or alkali in production kills both harmful bacteria and beneficial bacteria, which removes the biological characteristics of organic fertilizers, and does not belong to biological fertilizers; 2. Adding acid A large amount of unpleasant smell will be produced in the alkali process, and a large amount of ammonia gas will also be generated when adding alkali; 3, the production equipment requires high requirements and large investment, and the addition of acid and alkali increases the danger of production operation and increases the production cost; 4, the added Acid and alkali increase the concentration of salt ions in fertilizers, which is not good for crop growth

The shortcomings of this method are: 1. The odor of the organic waste liquid is only reduced by gas explosion, but not eliminated. After packaging, an anaerobic environment is formed, and the odor will also occur.

2. Explosive gas only inhibits the reproduction of anaerobic bacteria, promotes the reproduction of aerobic bacteria without selective and directional cultivation, and cannot be used as a biological fertilizer; harmful bacteria are not removed, and the rate of miscellaneous bacteria is high, which cannot meet the standards of biological fertilizers

The disadvantage of this type of patent is that there is no sterilization process for manure and water, and the harmful bacteria are not removed. Some harmful bacteria or miscellaneous bacteria have a stronger reproductive ability than cultured bacteria, resulting in a high rate of miscellaneous bacteria in the product, which cannot reach the level of agricultural biological bacteria. The national standard (GB20287-2006) and the ministerial standard (NY / T798-2004) of biological fertilizer

[0006] The fourth type, the Chinese patent "Livestock and Poultry Excrement Treatment Method" published on December 5, 2007, application number 200610013905.8, this method first adds concentrated hydrochloric acid to the urine and sewage to sterilize, neutralizes with sodium hydroxide, and then adds the Bacteria that need to be cultivated are cultivated. The disadvantage of this method is that adding hydrochloric acid increases the production cost and the concentration of chloride ions in the fertilizer. Most economic crops such as fruit trees and vegetables are chlorine-avoiding crops or chlorine-intolerant crops. Fertilizers with high chloride ions are unfavorable to the growth of crops, affecting their yield and quality

[0007] Fifth, the Chinese patent "Method for producing Trichoderma biofertilizer from livestock and poultry manure as a resource" published on September 28, 2011, application number 201010130132.8, proposes to first sterilize the organic waste liquid at high temperature and then add Trichoderma for cultivation. This method The main disadvantage is that the high-temperature sterilization of wastewater requires high energy consumption, especially today when coal burning is strictly controlled, heating by electricity or natural gas increases production costs

[0008] The sixth is the Chinese patent "A Method for Sterilizing Strawberry Juice by High-Voltage Pulse Electric Field" published on March 26, 2014, application number 201310616256.0. In recent years, there have been many patents and reports on the use of high-voltage pulse electric field for non-thermal sterilization of food. However, there are no patents or reports on the use of high-voltage pulsed electric fields to sterilize organic waste liquids

[0010] As mentioned above, the current patents and reports on the use of organic wastewater to produce liquid fertilizers have their own deficiencies, but their common deficiencies are;

2. In the cultivation of biological bacteria, only the number of bacteria reproduction is considered, and conditions are not considered to make the active substances produced by the synthesis and metabolism of biological bacteria accumulate as much as possible and reduce the use and consumption of active substances by biological bacteria