Method for producing maggot protein and sludge-based soil modifier by treating activated sludge

A technology of soil improver and activated sludge, which is applied in biological sludge treatment, sewage/sludge fertilizer, animal feed, etc., can solve the problems of time-consuming, etc., achieve simplified treatment process, low treatment cost, and realize reduction Effect

Inactive Publication Date: 2011-08-17
SHENYANG POLYTECHNIC UNIV
5 Cites 14 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Both of these methods require sludge ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Abstract

The invention relates to a method for producing a maggot protein and a sludge-based soil modifier by treating activated sludge, which is characterized by comprising the following steps: (1) selecting the breed of maggots; (2) filling activated sludge in a container, inoculating the maggot, culturing at the culture medium temperature of 20-35 DEG C under the ambient relative humidity of 60-80% for 3-10 days, separating the maggots, drying the maggots to obtain a dried product, and pulverizing the dried product to obtain the maggot protein; and (3) composting the residual solid substance separated from the maggots in a sealed environment at 15-35 DEG C for 3-10 days to obtain the sludge-based soil modifier. The invention effectively overcomes the defects in the fermentation treatment of sludge, simplifies the treatment process of residual sludge, stabilizes and recycles the sludge to change the sludge into harmless substances, can obtain a high-protein feed, and does not produce secondary pollution.

Application Domain

Climate change adaptationAnimal feeding stuff +2

Technology Topic

Environmental chemistryCulture mediums +4

Examples

  • Experimental program(4)

Example Embodiment

[0021] Example 1:
[0022] The method of processing activated sludge to produce fly maggot protein and sludge-based soil amendment includes the following steps:
[0023] (1) Selection of fly maggot species: use Lucilia sericata larvae.
[0024] (2) Put the activated sludge with an average moisture content of 65% into a plastic basin with a diameter of 500mm and a height of 150mm. The thickness of the sludge is 70mm. Inoculate with fly maggots. The temperature of the culture material is 20℃ and the relative humidity of the environment is 65. Under environmental conditions of %, after 7 days of culture, the fly larvae were separated, dried and crushed to make fly larva protein. After 20 tests, an average of 0.25 kg of fly maggots per kg of activated sludge can be harvested, and 0.06 kg of dry products can be obtained.
[0025] (3) The solid matter after separating fly larvae is sealed and piled for 6 days in an environment of 20~25℃ to obtain a sludge-based soil amendment. After the above treatment, the volume of sludge was reduced by 59% on average, realizing the reduction, stabilization, harmlessness and resource utilization of sludge.

Example Embodiment

[0026] Example 2:
[0027] A method for processing activated sludge to produce fly maggot protein and sludge-based soil amendment includes the following steps:
[0028] (1) Selection of fly larvae: select Sarcophaga larvae.
[0029] (2) Put the activated sludge with an average moisture content of 70% into a plastic basin with a diameter of 1000mm and a height of 150mm. The thickness of the sludge is 50mm. Inoculate fly maggots. The temperature of the culture material is 25℃ and the relative humidity of the environment is 70 Under environmental conditions of %, after 6 days of culture, the fly larvae were separated, dried and crushed to make fly larva protein. After 20 tests, an average of 0.25 kg of fly maggots per kg of activated sludge and 0.06 kg of dry products can be obtained.
[0030] (3) The solid matter after separating fly larvae is sealed and piled in an environment of 25~30℃ for 5 days to obtain a sludge-based soil amendment. After the above treatment, the volume of sludge was reduced by 52% on average, and the reduction, stabilization, harmlessness and resource utilization of sludge were realized.

Example Embodiment

[0031] Example 3:
[0032] A method for processing activated sludge to produce fly maggot protein and sludge-based soil amendment includes the following steps:
[0033] (1) Selection of fly larvae: select engineering fly larvae.
[0034] (2) Put the sludge with an average moisture content of 80% into a plastic basin with a diameter of 750mm and a height of 200mm. The thickness of the sludge is 60mm. Inoculate with fly maggots. The temperature of the culture material is 35℃ and the relative humidity of the environment is 80%. After culturing for 4 days, the fly larvae are separated, dried and crushed to make fly larva protein under the environmental conditions. After 20 tests, an average of 0.40 kg of fly maggots per kg of activated sludge and 0.12 kg of dry products can be obtained.
[0035] (3) The solid matter after separating fly larvae is sealed and piled in an environment of 25°C~35°C for 3 days to obtain a sludge-based soil amendment. After the above treatment, the volume of sludge was reduced by 70% on average, realizing the reduction, stabilization, harmlessness and resource utilization of sludge.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Similar technology patents

Hot rolling process of high-plasticity and low-anisotropy magnesium alloy and sheet thereof

ActiveCN101857933ASimple processEasy to controlTemperature control deviceProcess efficiency improvementZincMetal
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Catalytic yellow phosphorus tail gas oxidizing and purifying method in fixed bed

InactiveCN1398658ASimple processCatalyst is cheapDispersed particle separationChemical recyclingExhaust gasL&D process
Owner:KUNMING UNIV OF SCI & TECH

Sensing Structure

ActiveUS20090194342A1Reduce material usageSimple processTransmission systemsPrinted circuit aspectsElectrical and Electronics engineering
Owner:AU OPTRONICS CORP

Method for recovering and processing discarded fluorescent lamp

InactiveCN101150032AAvoid processingSimple processGlass recyclingElectronic waste recyclingRare-earth elementAdhesive
Owner:SOUTH CHINA NORMAL UNIVERSITY

Heat-proof combustion-resistant ABS resin and its preparation method

InactiveCN1962751ASimple processIncrease productivityChemistryFire retardant
Owner:SHANGHAI KINGFA SCI & TECH +1

Classification and recommendation of technical efficacy words

  • Reduce processing costs
  • Simple process

Process for imagewise opening and filling color display components and color displays manufactured thereof

InactiveUS6914714B2Easy and efficient to prepareReduce processing costsStatic indicating devicesElectrographic processes using photoelectrophoresisEngineeringDisplay device
Owner:E INK CALIFORNIA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap