Filter material for biological aerated filter and preparation method thereof

A biological aerated filter and filter material technology, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of poor control of the amount of dosing, and achieve the benefit of microbial attachment and growth , Huge specific surface area, the effect of avoiding secondary pollution

Inactive Publication Date: 2010-08-11
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the waterworks mainly adopt chemical methods, the generated sludge is mainly inorganic substances, and the coagulants added are mainly aluminum salts and iron salts, and aluminum salts and iron salts have a good adsorption effect on phosphorus, etc. At present, biological aerated filters mostly remove phosphorus by dosing, which is not easy to control the location of dosing points and the amount of dosing; sewage treatment plants mainly use biological methods to treat, and the volatile matter, Both TOC and calorific value are high, and have high reuse value. At the same time, due to the high carbon content, if heated or burned, it can provide sufficient gas-forming substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 10kg of sewage treatment plant sludge into an oven at 105°C for 24h drying, ball mill it through a 100-mesh sieve, and take it out for use; take 80kg of sewage treatment plant sludge into an oven at 105°C and dry it for 24h, then ball-mill it through a 100-mesh sieve. Stir the sieved water plant sludge, sewage treatment plant sludge, 3kg coal powder and 7kg water glass thoroughly, and sprinkle water to form a raw material ball; put the molded raw material ball in an oven at 105°C for 24h; dry it The ready raw material balls are taken out, put into a box-type resistance furnace, heated to 450°C, and kept for 10 minutes for preheating. The preheated raw material balls are quickly moved into a program-controlled electric furnace that has been heated to 1000° C. and roasted for 60 minutes, then taken out, and cooled to room temperature to obtain the required filter material for the aerated biological filter.

[0017] Take BAF process water quality: BOD 5 The concentration...

Embodiment 2

[0019] Take 15kg of sewage treatment plant sludge into an oven at 105°C for 24h drying, ball mill through a 100-mesh sieve, and take it out for use; take 70kg of sewage treatment plant sludge into an oven at 105°C and dry it for 24h, then ball-mill it through a 100-mesh sieve. Stir the sieved water plant sludge, sewage treatment plant sludge, 5kg starch and 10kg water glass thoroughly, sprinkle water to form a raw material ball; put the molded raw material ball in an oven at 105°C for 24h; dry it well The raw material balls that have been prepared are taken out, placed in a box-type resistance furnace, heated to 500°C, and kept for 20 minutes for preheating. The pre-heated raw material balls are quickly moved into a program-controlled electric furnace that has been heated to 1100°C and roasted for 50 minutes, then taken out, and cooled to room temperature to obtain the required filter material for the aerated biological filter.

[0020] Take BAF process water quality: BOD 5 The c...

Embodiment 3

[0022] Take 20kg of sewage treatment plant sludge and put it in an oven at 105°C for 24h drying, ball mill it through a 100-mesh sieve, and take it out for use; take 60kg of sewage treatment plant sludge into an oven at 105°C and dry it for 24h, then ball-mill it through a 100-mesh sieve. Stir the sieved water plant sludge, sewage treatment plant sludge, 5kg sawdust and 15kg water glass thoroughly, and sprinkle water to form a raw material ball; put the molded raw material ball in an oven at 105°C and dry for 24h; The ready raw material balls are taken out, put into a box-type resistance furnace, heated to 550°C, and kept for 30 minutes for preheating. The preheated raw material balls are quickly moved into a program-controlled electric furnace that has been heated to 1200°C and roasted for 40 minutes, then taken out, and cooled to room temperature to obtain the required filter material for the aerated biological filter.

[0023] Take BAF process water quality: BOD 5 The concentr...

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PUM

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Abstract

The invention relates to a filter material for a biological aerated filter, which comprises the following raw materials by mass part: 10-40 parts of sludge from a waterworks, 25-80 parts of sludge from a sewage treatment works, 3-15 parts of pore-forming agent, and 7-20 parts of binder. Since the sludge from the sewage treatment works has higher carbon content, and the particle surface forms a porous state by adding right amount of pore-forming agent, the filer material has better adsorption and removal effects for pollutants in wastewater. The prepared filter material has huge specific surface area, is favorable for the attached growth of microorganisms, and is a novel efficient filter material for the biological aerated filter.

Description

1. Technical field [0001] The invention belongs to the technical field of environmental engineering water treatment, and mainly relates to a filter material for water treatment and a preparation method thereof, in particular to a filter material used in a biological aerated filter water treatment process and a preparation method thereof. 2. Background technology [0002] At present, my country's waterworks mainly use the "old three sets" of coagulation-sedimentation-filtration as the main production process, so a large amount of sludge is produced in the production process. If the muddy wastewater is discharged directly without treatment, it will pollute the receiving water body and silt up the river. If mechanical or natural drying and dehydration methods are used to treat muddy wastewater, and then the dewatered cakes are piled on the ground or landfilled, it will take up a lot of fields, and may pollute surface water and groundwater, and the sludge will not get resources....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/06C04B38/06C04B33/132C04B33/30C04B33/32
CPCY02P40/60Y02W10/10
Inventor 李轶刘志刚张洪光
Owner HOHAI UNIV
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