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Biological purification block based on municipal sludge as well as preparation method and application thereof

A municipal sludge and biological purification technology, applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve the problems of inability to purify water for a long time, poor adsorption performance of permeable bricks, etc., and achieve efficient use of solid waste Physical function, improving immobilization and adsorption, strong water absorption and water holding capacity

Active Publication Date: 2021-04-30
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization of municipal sludge resources in the construction of sponge cities mainly includes green roof substrates, permeable bricks, bioretention systems, etc., but conventional permeable bricks have poor adsorption performance, and cannot effectively and long-term purify water quality while permeating water.

Method used

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  • Biological purification block based on municipal sludge as well as preparation method and application thereof
  • Biological purification block based on municipal sludge as well as preparation method and application thereof
  • Biological purification block based on municipal sludge as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Preparation of mixed bacterial agent

[0040] Mix the dormant bacterial agent of Bacillus amyloliquefaciens IAE and the dormant bacterial agent of Trichoderma aculeatus 12 according to the mass ratio of 1:3, and mix thoroughly to form a mixed bacterial agent.

[0041] 2. High temperature stacking of municipal sludge

[0042] Inoculate the mixed bacterial agent into the dewatered municipal sludge according to the mass ratio of 1%, and add the crushed wheat straw with a length of 2-50mm according to the mass ratio of 30% to the municipal sludge, and the water content of the pile is 60%, and mix well. Trough stacking, the stacking height is 2m, the central stacking temperature is maintained at 60°C for 14 days, the stacking is turned over and repeated 3 times, and the fermentation stacking period is 40 days. The municipal sludge used is mechanically dewatered sludge from a water treatment plant, with a water content of 80%, and the contents of heavy metals and pathogen...

Embodiment 2

[0051] 1. Preparation of mixed bacterial agent

[0052] Mix the dormant bacterial agent of Bacillus amyloliquefaciens IAE and the dormant bacterial agent of Trichoderma aculeatus 12 according to the mass ratio of 2:5, and thoroughly mix into a mixed bacterial agent.

[0053] 2. High temperature stacking of municipal sludge

[0054] Inoculate the mixed bacterial agent into the dewatered municipal sludge according to the mass ratio of 2%, and add the ground rice straw with a length of 2-50mm according to the mass ratio of 50% to the municipal sludge, and the water content of the pile is 50%, mix well, and strip Pile stacking, the stacking height is 3m, the central stacking temperature is maintained at 70°C for 20 days, the stacking is turned over, and repeated 5 times, and the fermentation stacking period is 30 days. The municipal sludge used is mechanically dewatered sludge from sewage treatment plants, with a water content of 82%, and the contents of heavy metals and pathogen...

Embodiment 3

[0062] 1. Preparation of mixed bacterial agent

[0063] Mix the dormant bacterial agent of Bacillus amyloliquefaciens IAE and the dormant bacterial agent of Trichoderma aculeatus 12 according to the mass ratio of 1:1, and mix thoroughly to form a mixed bacterial agent.

[0064] 2. High temperature stacking of municipal sludge

[0065] Inoculate the mixed bacterial agent into the dewatered municipal sludge according to the mass ratio of 2%, and add the crushed corn stalks with a length of 2-50mm according to the mass ratio of 20% to the municipal sludge, and the water content of the pile is 65%, mix well, and strip Pile stacking, the stacking height is 5m, the central stacking temperature is maintained at 70°C for 20 days, the stacking is turned over, and repeated 5 times, and the fermentation stacking period is 40 days. The municipal sludge used is mechanically dewatered sludge from sewage treatment plants, with a water content of 82%, and the contents of heavy metals and pat...

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Abstract

The invention discloses a biological purification block based on municipal sludge as well as a preparation method and application thereof; the biological purification block is mainly prepared from municipal sludge, functional microorganisms, botanical carbon fiber substances, clay, gypsum residues and magnesium oxide, and functional microorganism strains are Bacillus amyloliquefaciens IAE and Trichoderma asperellum 12. Based on immobilization and implantation of functional microorganisms including bacillus amyloliquefaciens IAE and trichoderma asperellum 12 in municipal sludge, the prepared biological purification block has the capacity of immobilizing and purifying pollutants including nitrogen and phosphorus organic matters, solid suspended particles and the like in a water body, the water body is effectively purified, a large amount of municipal sludge is rapidly digested, and a new way is provided for recycling of municipal sludge.

Description

technical field [0001] The invention belongs to biological technology, in particular to a biological purification block based on municipal sludge and its preparation method and application Background technique [0002] The volume of municipal sludge is large. Vigorously promoting the stabilization, harmless and resourceful treatment and disposal of sludge is an important item in the ecological environment protection plan. Conventional treatment measures such as landfill, making building materials, incineration and other measures have relatively little environmental risk and market demand, and it is difficult to consume huge volumes of municipal sludge. [0003] At present, the construction of sponge city is vigorously promoted, so that the city can absorb, store, infiltrate and purify water when it rains like a sponge, and "release" the stored clean water and make use of it when needed. At present, the utilization of municipal sludge resources in the construction of sponge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/30C02F101/16C02F101/10
CPCC02F3/34C02F2305/06C02F2101/30C02F2101/16C02F2101/105C02F2209/10
Inventor 陈立华张欢张风革魏诗蓝郑超然
Owner HOHAI UNIV
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