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Sintering-free raw material ball filler for rural sewage treatment system, and preparation and maintenance method of sintering-free raw material ball filler

A technology for treating system and rural sewage, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, sustainable waste treatment, etc. It can solve the problems of easy glaze on the filler surface, limit the amount of microbial adhesion, and energy consumption of inorganic fillers Large and other problems, to achieve the effect of resource utilization, increase the amount of active microbial film formation, and reduce the weight of fillers

Active Publication Date: 2022-03-11
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inorganic filler prepared by the sintering process has the disadvantages of high energy consumption and high cost, and the surface of the filler is easy to be glazed at high temperature, which is not conducive to increasing its specific surface area and limiting the amount of microbial adhesion.

Method used

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  • Sintering-free raw material ball filler for rural sewage treatment system, and preparation and maintenance method of sintering-free raw material ball filler
  • Sintering-free raw material ball filler for rural sewage treatment system, and preparation and maintenance method of sintering-free raw material ball filler
  • Sintering-free raw material ball filler for rural sewage treatment system, and preparation and maintenance method of sintering-free raw material ball filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] This embodiment discloses a sinter-free raw meal ball filler for a rural sewage treatment system, which includes the following raw materials in weight ratio: 55% of fly ash, 15% of dewatered sludge, 20% of cement, 5% of calcium oxide, 2% of ammonium acetate, Sodium silicate 3%, triethanolamine 0.05%.

[0078] In order to further optimize the above technical scheme, SiO in fly ash 2 and Al 2 o 3 The mass content of the fly ash is 52-55% and 28-32%, respectively, and the moisture content of the fly ash is less than 2%;

[0079] In order to further optimize the above technical scheme, SiO in dewatered sludge 2 and Al 2 o 3 The mass content of the dewatered sludge is 15-18% and 5-8%, respectively, and the moisture content of the dewatered sludge is less than 5%;

[0080] In order to further optimize the above technical scheme, SiO in cement 2 and Al 2 o 3 The mass content of cement is 20-25% and 6-8% respectively; the moisture content of cement is less than 2%;

...

Embodiment 2

[0106] This embodiment discloses a sinter-free raw meal ball filler for a rural sewage treatment system, which includes the following raw materials in weight ratio: 50% of fly ash, 10% of dewatered sludge, 25% of cement, 8% of calcium oxide, 2% of ammonium acetate, Sodium silicate 5%, triethanolamine 0.04%.

[0107] And the difference with the preparation method of a kind of sintering-free raw meal spherical filler for rural sewage treatment system disclosed in Example 1 is that in S3, the stirring is carried out by using a vertical shaft planetary mixer, the mixer speed is 550r / min, and the mixing time is 4min. And to adjust the pH value is to add 7wt% calcium hydroxide solution.

[0108] A curing method is provided on the basis of the raw meal ball filler prepared above, which specifically includes:

[0109] 1) Curing at room temperature

[0110] First cured the raw ball filler at 20°C for 12 hours;

[0111] 2) High temperature steam curing

[0112] Then carry out high-t...

Embodiment 3

[0120] This embodiment discloses a sinter-free raw meal ball filler for a rural sewage treatment system, which includes the following raw materials in weight ratio: 60% of fly ash, 10% of dewatered sludge, 20% of cement, 6% of calcium oxide, 1% of ammonium acetate, Sodium silicate 3%, triethanolamine 0.06%.

[0121] And the difference with the preparation method of sintering-free raw meal ball filler disclosed in a kind of rural sewage treatment system disclosed in embodiment 1 is:

[0122] In S2, wherein the ammonium acetate is configured as a solution with a concentration of 1wt% for subsequent use;

[0123] In S3, stirring is carried out by using a vertical shaft planetary mixer, the mixer speed is 550r / min, the stirring time is 3min, and the pH value is adjusted to 7.8, and 10wt% calcium hydroxide solution is added to adjust the water content to 16%.

[0124] A curing method is provided on the basis of the raw meal ball filler prepared above, which specifically includes: ...

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Abstract

The invention discloses a sintering-free raw material ball filler for a rural sewage treatment system as well as a preparation method, a maintenance method and application of the sintering-free raw material ball filler. Comprising 50-60% of fly ash, 10-20% of dewatered sludge, 20-30% of cement, 5-8% of calcium oxide, 1-2% of ammonium acetate, 3-5% of sodium silicate and 0.04-0.06% of triethanolamine. Preparing a raw material ball filler by adopting a sintering-free process; the obtained raw material ball filler is sequentially subjected to normal-temperature curing, high-temperature steam curing and water spraying curing, a filler product with excellent ineffective efficiency is prepared from a finished product, the filler product is applied to a BAF system, and the removal rates of COD and NH3-N in the stable period can be stabilized at 84% and 71% respectively. In a word, the fly ash is used as a main raw material, the cement and the dewatered sludge are added, the calcium oxide is used as an auxiliary exciting agent, the ammonium acetate is used as a pore increasing agent, the specific surface area of the filler is increased, and the raw material ball filler has high porosity, large specific surface area, moderate strength and excellent performance.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, and more specifically relates to a non-sintering filler for a rural sewage treatment system, a preparation and maintenance method and application thereof. Background technique [0002] Rural sewage refers to the sewage formed by residents in rural areas in the process of life and production, including production sewage and domestic sewage. Among them, domestic sewage refers to the waste water produced by toilets, bathing, daily cleaning and kitchen in the process of residents' life; production sewage refers to the waste water produced by animal husbandry and agricultural product processing. [0003] Rural sewage generally has a small amount of production, discontinuous sewage discharge, low pollutant concentration, large changes, and contains certain N, P and other substances. [0004] Due to the advantages of good treatment effect, large amount of living microorganisms per unit volume ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/02C04B40/02C04B18/08C02F3/10
CPCC04B28/00C04B38/02C04B40/0277C04B40/0245C04B18/08C02F3/105C04B2201/20C04B2201/50C04B18/0427C04B22/064C04B24/12C04B12/04C04B24/122C04B38/0074C04B40/02Y02W10/10Y02W30/91
Inventor 刘建伟迟名佳田洪钰陈雪威
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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