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A kind of method utilizing composting reactor to produce high nitrate concentration organic fertilizer

A composting reactor and nitrate technology are applied in the preparation of organic fertilizers, organic fertilizers, organic fertilizer equipment and other directions, which can solve the problems of low nitrate content, no nitrate generation, and failure to occur smoothly, and achieve high nitrogen content. , reducing the large loss of nitrogen, the effect of good application prospects

Active Publication Date: 2020-04-10
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although it is hoped to obtain a higher nitrate content, because the existing methods cannot create conditions conducive to biological nitrification, the formation of nitrate does not occur or cannot occur smoothly, which in turn leads to a low nitrate content in the final product compost. The highest nitrate concentration of the organic fertilizer reported in the literature is only several thousand mg / kg-dry weight

Method used

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  • A kind of method utilizing composting reactor to produce high nitrate concentration organic fertilizer

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1 composting method of the present invention

[0030] 1. Raw materials

[0031] Cow dung, with a water content of 80% and a C / N ratio of 18, comes from a dairy farm near Shuangliu County.

[0032] 2. Composting method

[0033] 2.1 Raw material pretreatment

[0034] Take cow dung and squeeze it to make the water content 70-72%.

[0035] 2.2 Composting

[0036] Composting devices such as figure 1 As shown, it includes a thermal insulation shell 21, a composting chamber 4 and a controller 20. The thermal insulation shell 21 includes a shell 7 and a shell cover 8. The shell cover 8 is covered on the top of the shell 7, and the inner surface of the shell cover 8 is gradually downward from the middle to the edge. Inclined, the housing 7 and the shell cover 8 are double-layer structures, there is a gap between the two layers, and the gap is filled with thermal insulation foam 9; A cavity A23 is formed between them, a heating belt 10 is arranged on the outer wa...

Embodiment 2

[0055] Embodiment 2 composting method of the present invention

[0056] 1. Raw materials

[0057] Chicken manure, with a water content of 78.2% and a C / N ratio of 7.5, came from a laying hen farm near Shuangliu County.

[0058] 2. Composting method

[0059] 2.1 Raw material pretreatment

[0060] Take the chicken manure and squeeze it to make the water content 70-72%.

[0061] 2.2 Composting

[0062] Composting device is the same as embodiment 1.

[0063] Operation mode:

[0064] (1) Feeding: Get the pretreated material and put it into the reactor, the amount of input is 80% of the volume of the reactor.

[0065] (2) Composting process:

[0066] First-stage fermentation: After feeding, the temperature of the composting chamber gradually rises to 60°C (set the heating rate at 0.5°C / hour, and heat with a heating belt when the heating rate is lower than 0.5°C / hour). (The gas introduced is air) is 0.4L / min / kg-dry weight; maintain the temperature in the composting chamber (6...

Embodiment 3

[0079] Embodiment 3 composting method of the present invention

[0080] 1. Raw materials

[0081] The anaerobic digestion sludge of food waste, with a water content of 77.8% and a C / N ratio of 10.5, came from Shuangliu County Airport Food Waste Resource Utilization Company. Sawdust moisture content 11.9%, C / N ratio 343.2, from a wood processing factory around Shuangliu County; mature compost, moisture content 24.6%, C / N ratio 15.3, purchased from the market.

[0082] 2. Composting method

[0083] 2.1 Raw material pretreatment

[0084] Take kitchen waste anaerobic digestion sludge, sawdust and mature compost, mix according to wet weight 10:1:1, the moisture content of the mixture is 65%, and the C / N ratio is 12.2.

[0085] 2.2 Composting

[0086] Composting device is the same as embodiment 1.

[0087] Operation mode:

[0088] (1) Feeding: Get the pretreated material and put it into the reactor, the amount of input is 75% of the volume of the reactor.

[0089] (2) Compost...

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Abstract

The invention discloses a method for producing high-nitrate-concentration organic fertilizer through a bioreactor. The method is characterized in that organic fertilizer is produced through a composting device comprising a thermal insulating shell, a composting chamber and a controller, the composting chamber is arranged in the thermal insulating shell, a cavity A is formed between the outer side wall of the composting chamber and the thermal insulating shell, a heating belt is arranged on the outer wall of the composting chamber, a supporting bottom plate is arranged at the position, close to the bottom, in the composting chamber, a cavity B is formed between the supporting bottom plate and the bottom of the composting chamber, the cavity B is communicated with the outside world through a gas inlet pipeline, the end, located outside the thermal insulating shell, of the gas inlet pipeline is connected with a gas flow meter and an electromagnetic valve, a gas outlet pipeline is arranged on the top of the thermal insulating shell, one end of the gas outlet pipeline is located in the thermal insulating shell, the other end of the gas outlet pipeline is located outside the thermal insulating shell, the end, located outside the thermal insulating shell, of the gas outlet pipeline is connected with a suction bottle, a temperature sensor is arranged in the thermal insulating shell, and the heating belt, the temperature sensor, the gas flow meter, the electromagnetic valve and the controller are electrically connected, and the thermal insulating shell comprises a shell body and a shell cover, the shell cover is located on the top of the shell body, and the inner surface of the shell cover gradually inclines downwards from the middle to the edge.

Description

technical field [0001] The invention relates to a method for producing high nitrate concentration organic fertilizer by using a composting reactor. Background technique [0002] In agricultural production, the consumption of chemical fertilizers is huge, but due to a series of reactions such as fixation, decomposition, and volatilization of chemical fertilizers after they are applied to the soil, the utilization rate of fertilizers is low, and the utilization rate of nitrogen fertilizers is only 20-30%. This not only causes waste of nutrient resources, but also causes a series of environmental problems such as soil compaction, secondary salinization, and groundwater pollution. At the same time, with the development of social economy, a large amount of waste biomass is produced every year in my country, with an annual output of more than 800 million tons of various crop straws, 1.73 billion tons of livestock and poultry manure, 60 million tons of kitchen waste, and 30 million...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F3/00C05F7/00C05F9/00C05F11/00C05F15/00C05F3/06C05F9/04C05F17/90C05F17/964C05F17/993
CPCC05F3/00C05F7/00C05F9/00C05F11/00C05F17/90Y02A40/20Y02W30/40
Inventor 孙照勇木田建次谭力汤岳琴
Owner SICHUAN UNIV
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