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Method for producing biogas energy while preparing organic fertilizer or compound fertilizer by using inorganic fertilizer

A technology of inorganic fertilizer and organic fertilizer, which is applied in the fields of agriculture and energy, can solve the problems of uncollected and utilized biogas, complex procedures, lack of quick-acting fertility, etc., and achieve the effect of increasing and preserving soil moisture, improving soil structure, and improving soil structure

Active Publication Date: 2014-02-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the procedure of this invention is quite complicated, there are many types of added substances, and it does not contain other inorganic nutrients with fast fertilizer efficiency except nitrogen.
In addition, this invention does not collect and utilize biogas, and the fertility also lacks quick effect

Method used

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  • Method for producing biogas energy while preparing organic fertilizer or compound fertilizer by using inorganic fertilizer

Examples

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Effect test

Embodiment 1

[0041] A method for producing organic fertilizer or compound fertilizer from inorganic fertilizer and simultaneously producing biogas energy, the method comprises the following steps: (1) putting 1000m 3 water, take 1m 3 The greenish river water is inoculated with microalgae and poured into the photobioreactor. (2) Take inorganic fertilizer and add it into the bioreactor. After dissolution, the nitrogen and phosphorus concentrations are 1mg / L and 0.2mg / L respectively. Under the natural sunlight, the biomass of microalgae grows steadily. (3) When the biomass reaches 5g / L, the microalgae are separated by filtration, and put into a biogas fermenter after ultrasonic crushing. (4) The microalgae stays in the biogas fermenter for 10 days, 40% of which are converted into biogas, 30% into biogas slurry, and 30% into biogas residue. The biogas enters the gas storage tank for standby, the biogas slurry flows back to the photobioreactor, and the biogas residue is used as compound ferti...

Embodiment 2

[0043] A method for producing organic fertilizer or compound fertilizer from inorganic fertilizer and simultaneously producing biogas energy, the method comprises the following steps: (1) putting 1m in the photobioreactor 3 Water, take 1L of green river water to inoculate microalgae, and pour it into the photobioreactor. (2) Take inorganic fertilizer and add it into the bioreactor. After dissolution, the nitrogen and phosphorus concentrations are 0.1mg / L and 0.02mg / L respectively. Under the natural sunlight, the biomass of microalgae grows steadily. (3) When the biomass reaches 0.5g / L, the microalgae are separated by filtration, and put into the biogas fermenter after ultrasonic crushing. (4) The microalgae stays in the biogas fermenter for 3 days, 40% of which are converted into biogas, 40% into biogas slurry, and 20% into biogas residue. The biogas enters the gas storage tank for standby, the biogas slurry flows back to the photobioreactor, and the biogas residue is used as...

Embodiment 3

[0045] A method for producing organic fertilizer or compound fertilizer from inorganic fertilizer and simultaneously producing biogas energy, the method comprises the following steps: (1) putting 5m in the photobioreactor 3 Water, buy Chlorella (Chlorella), and inoculate into the photobioreactor after expansion. (2) Take inorganic fertilizer and add it into the bioreactor. After dissolution, the concentration of nitrogen and phosphorus is 10mg / L and 2mg / L respectively. Under the natural sunlight, the biomass of microalgae grows steadily. (3) When the biomass reaches 50g / L, the microalgae are separated by filtration, and put into the biogas fermenter after ultrasonic crushing. (4) Microalgae stay in the biogas fermenter for 45 days, 50% of which are transformed into biogas, 30% into biogas slurry, and 20% into biogas residue. The biogas enters the gas storage tank for standby, the biogas slurry flows back to the photobioreactor, and the biogas residue is used as compound ferti...

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Abstract

The invention relates to a method for producing biogas energy while preparing an organic fertilizer or a compound fertilizer by using an inorganic fertilizer. The method comprises the following steps of inputting the inorganic fertilizer into a photo-bioreactor inoculated with microalgae to enable the microalgae to rapidly grow in the photo-bioreactor under the action of the inorganic fertilizer, separating the microalgae from the photo-bioreactor and placing the microalgae in a methane fermentor when the concentration of the microalgae reaches to 0.5g / L-50g / L, and performing fermentation for 3-45 days to generate methane, methane liquid and methane residues, wherein the methane liquid flows back to the photo-bioreactor to be re-utilized, the methane is used as an energy source, and the methane residues are used as the organic fertilizer or the compound fertilizer. Compared with the prior art, a whole system of the method is very simple, easy to manufacture and install and can be popularized and used in families, especially in peasant households, and the cost of required materials is low. When the whole system operates, except simply adding of the inorganic fertilizer, manual intervention is not required, manually-added inorganic substance and organic substance (including any forms of biomasses containing nutrient substance and derived fertilizers of the biomasses) are not required.

Description

technical field [0001] The invention relates to the fields of agriculture and energy, in particular to a method for preparing organic fertilizer or compound fertilizer from inorganic fertilizer and simultaneously producing biogas energy. Background technique [0002] Inorganic fertilizers refer to fertilizers composed of inorganic substances containing nitrogen (N), phosphorus (P), potassium (K) and other nutrients needed by plants, commonly known as mineral fertilizers, chemical fertilizers, and chemical fertilizers. It has the characteristics of simple ingredients, high content of active ingredients, easily soluble in water, fast decomposition, and easy absorption by roots, so it is also called "quick-acting fertilizer". However, the shortcomings of inorganic fertilizers are also very obvious. Its fertilizer effect is short, easy to decompose, single nutrient, and does not contain organic matter. Moreover, long-term use will cause pollution, soil compaction, intensified er...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F7/00C12P5/02
CPCY02E50/343Y02A40/20Y02E50/30Y02W30/40
Inventor 靳强
Owner SHANGHAI JIAO TONG UNIV
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