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Method for achieving biochemical sludge resource treatment by culturing hermetia illucens

A biochemical sludge and treatment method technology, applied in the direction of biological sludge treatment, application, animal feed, etc., can solve the problems of treatment efficiency reduction, oxygen consumption, difficulties, etc., achieve resource utilization, solve environmental pollution problems, reduce The effect of large space occupation

Inactive Publication Date: 2018-12-28
浙江强恩生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the harmless treatment of urban human waste, a large amount of polymer flocculants need to be added, and the final biochemical sludge will be severely compacted during the water reduction process.
Although biochemical sludge contains a large amount of organic matter, it cannot be directly used as a culture material for black soldier fly larvae like kitchen waste
Because biochemical sludge is easy to harden, when feeding, although the upper layer of sludge (about 3-5cm in thickness) can keep fluffy during the creeping process of the swarm, but a layer of about 1-2cm thick hardening layer will form below, which is absolutely impossible. Most black soldier fly larvae cannot pass through this layer of hardening layer, resulting in a decrease in treatment efficiency; at the same time, this layer of hardening layer will also block air circulation, and the fermentation of sludge under the hardening layer consumes oxygen, resulting in good early vitality and deeper drilling. The larvae suffocate, so it is very difficult to feed black soldier fly larvae directly with biochemical sludge as raw material

Method used

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  • Method for achieving biochemical sludge resource treatment by culturing hermetia illucens
  • Method for achieving biochemical sludge resource treatment by culturing hermetia illucens
  • Method for achieving biochemical sludge resource treatment by culturing hermetia illucens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Take 1kg of biochemical sludge (water content 65%) and 0.20kg of wet rush granules (1-3mm in length) and stir them well every day and place them in a container to feed black soldier fly larvae. The black soldier fly larvae are made of kitchen waste Larvae (length greater than 0.5 cm) are hatched and fed with the slurry for three days. After feeding for 20 days, the larvae gradually age and enter the prepupa stage for screening and separation. The ambient temperature for breeding is 28°C, the air humidity is 60%RH, and the conditions of low light.

[0021] 2. Add sawdust to feed and black soldier fly larvae, stir evenly to reduce the humidity to 35% RH, then vibrate to separate organic fertilizer and black soldier fly larvae. 20kg of organic fertilizer and 2.5kg of black soldier fly larvae (prepupal state) can be obtained.

[0022] 3. The composition analysis comparison table of the separated organic fertilizer is as follows:

[0023] Table 1. Comparison table of de...

Embodiment 2

[0026] 1. Take 10kg of biochemical sludge (water content 60%) every day, 2.5kg of wet wheat bran is fully stirred and placed in a container to feed black soldier fly larvae. Black soldier fly larvae are larvae hatched and fed with pumpkin mud for three days (length greater than 0.5cm), after feeding for 20 days, the larvae gradually aged and entered the prepupa stage, and were screened and separated. The ambient temperature for breeding is 25°C, the air humidity is 70%RH, and the conditions of low light.

[0027] 2. Add sawdust to feed and black soldier fly larvae, stir evenly to reduce the humidity to 35% RH, then vibrate to separate organic fertilizer and black soldier fly larvae. 186kg of organic fertilizer and 23kg of black soldier fly larvae (prepupal state) can be obtained.

[0028] 3. The composition analysis comparison table of the separated organic fertilizer is as follows:

[0029] Table 2. Comparison table of detection items of biochemical sludge and insect droppi...

Embodiment 3

[0033] 1. Take 9kg of biochemical sludge (water content 70%) every day, 3kg of wet rice bran is fully stirred and placed in a container to feed black soldier fly larvae. Black soldier fly larvae are larvae hatched and fed with pumpkin mud for three days (length greater than 0.5 cm), after 10 days of feeding, the larvae gradually matured, and they were in the best collection period of protein feed, and they were screened and separated. The ambient temperature for breeding is 30°C, the air humidity is 70% RH, and the conditions of low light.

[0034] 2. Add sawdust to feed and black soldier fly larvae, stir evenly to reduce the humidity to 25% RH, then vibrate to separate the organic fertilizer and black soldier fly larvae. 103kg of organic fertilizer and 16kg of black soldier fly larvae can be obtained.

[0035] 3. The composition analysis comparison table of the separated organic fertilizer is as follows:

[0036] Table 3. Comparison table of detection items of biochemical s...

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Abstract

The invention discloses a method for achieving biochemical sludge resource treatment by culturing hermetia illucens. The method includes the following steps: (1) mixing biochemical sludge and a leavening agent according to a certain ratio and fully stirring the mixture as a culturing material; 2) putting the culturing material in a container and putting a certain proportion of hermetia illucens larvae to carry out culture of the hermetia illucens; (3) after the hermetia illucens larvae are cultured for a certain period, making the hermetia illucens larvae eat the culturing material that is then excreted to become worm manure; (4) after the hermetia illucens larvae and the worm manure are screened and separated, utilizing the hermetia illucens larvae as a high protein feed and utilizing theremaining worm manure as an organic fertilizer. The organic matter content in the worm manure is greatly reduced, and the worm manure can be directly used for crop fertilization. According to the method, the environmental pollution problem is solved in the biochemical sludge treatment process, high-value insect protein and nutrient-rich organic fertilizer are obtained, and the resource utilization of the biochemical sludge is achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for realizing resourceful treatment of biochemical sludge by raising black soldier flies and a method for preparing organic fertilizer. Background technique [0002] As people become more and more aware of environmental protection, the harmless treatment and resource utilization of environmental pollution sources have received great attention from people. Turning waste into wealth and recycling is the general trend. For example, human excrement in septic tanks is a source of pollution. Improper disposal will cause the surrounding environment to smell bad and breed mosquitoes and flies. However, the biochemical sludge obtained after harmless treatment such as grid filtration, probiotic fermentation, and extrusion dehydration contains a large amount of organic matter and mineral oil, which can be processed into organic fertilizer for utilizatio...

Claims

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Application Information

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IPC IPC(8): C02F11/02A01K67/033A23K50/90C05F3/00
CPCA01K67/033A23K50/90C02F11/02C05F3/00Y02A40/20
Inventor 俞波俞明远俞重阳
Owner 浙江强恩生物科技有限公司
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