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Membrane bio-filler, preparation method thereof and membrane bioreactor

A biofilm and biochar technology, applied in the field of water treatment, can solve the problems of long film hanging time and low sewage degradation efficiency, and achieve the effects of increasing specific gravity and activity, shortening film hanging time, and improving sewage degradation efficiency.

Active Publication Date: 2017-08-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the fillers widely used in biofilm reactors include natural fillers such as British sand, anthracite, marble, dolomite, magnetite, garnet, and manganese sand, as well as polystyrene foamed plastic balls, high-efficiency fiber bundles, and ceramics. Artificial fillers such as filter materials, but the biofilm reactors using the above-mentioned fillers generally have the problems of long film-hanging time and low sewage degradation efficiency

Method used

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  • Membrane bio-filler, preparation method thereof and membrane bioreactor
  • Membrane bio-filler, preparation method thereof and membrane bioreactor
  • Membrane bio-filler, preparation method thereof and membrane bioreactor

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preparation example Construction

[0040] The present invention provides a kind of preparation method of biofilm filler described in above-mentioned technical scheme, comprises the following steps:

[0041] a) mixing sludge biochar, walnut shell biochar, quicklime, Portland cement, aluminum powder and water to obtain slurry to be poured;

[0042] b) pouring the slurry to be poured into a mold, and the slurry to be poured is gassed and solidified in the mold to obtain a biofilm filler.

[0043] In the preparation method provided by the invention, firstly, sludge biochar, walnut shell biochar, quicklime, Portland cement, aluminum powder and water are mixed to obtain the slurry to be poured. In the present invention, the above-mentioned raw materials are preferably mixed in the following manner:

[0044] a1) mixing sludge biochar, walnut shell biochar, quicklime, Portland cement and water to obtain primary slurry;

[0045] a2) The primary slurry is mixed with aluminum powder to obtain the slurry to be poured; wh...

Embodiment 1

[0064] Preparation of biofilm filler

[0065] The weight ratio of the components of the biofilm filler is as follows: 0.35g of aluminum powder (200 mesh), 30g of sludge biochar, 25g of pozzolan Portland cement (P.P32.5), 30g of walnut shell biochar, and 17g of lime , 40g of water.

[0066] (1) Preparation of sludge biochar: the residual sludge (water content 55%) of a sewage treatment plant in Guangzhou, after dehydration, was dried in an oven at 105°C to constant weight, crushed into particles of about 0.5mm, and then Move it into a muffle furnace and heat it to 400°C for carbonization at a constant temperature for 60 minutes without air, stop heating, stay in the furnace for 1 hour, and take it out for use. The average particle size, specific surface area and pore volume of the prepared sludge biochar were tested, and the results were: average particle size 0.38mm, specific surface area 51.332m 2 / g, pore volume 0.04621cm 3 / g.

[0067] (2) Preparation of walnut shell bi...

Embodiment 2

[0072] Preparation of biofilm filler

[0073] The weight proportion of each component of biofilm filler is as follows: aluminum powder (300 mesh) 0.40g, sludge biochar 25g, fly ash portland cement (P.F42.5) 25g, walnut shell biochar 32g, Lime 18g, water 42g.

[0074] (1) Preparation of sludge biochar: the residual sludge (water content 60%) of a sewage treatment plant in Guangzhou, after dehydration, was dried in an oven at 110°C to constant weight, crushed into particles of about 0.5mm, and then Move it into a muffle furnace and heat it to 430°C for 1.2 hours of carbonization at a constant temperature without air, stop heating, stay in the furnace for 1 hour, and take it out for use. The average particle size, specific surface area and pore volume of the prepared sludge biochar were tested, and the results were: average particle size 0.36mm, specific surface area 60.401m 2 / g, pore volume 0.06471cm 3 / g.

[0075] (2) Preparation of walnut shell biochar: crush walnut shell...

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Abstract

The invention belongs to the field of water treatment and particularly relates to a membrane bio-filler, a preparation method thereof and a membrane bioreactor. The membrane bio-filler is prepared from, by weight, 25-30 parts of sludge biochar, 30-35 parts of walnut shell biochar, 15-20 parts of quick lime, 20-25 parts of Portland cement, and 0.3-0.5 part of aluminum powder. The variety and content of raw materials for preparing the membrane bio-filler are optimized such that the membrane bio-filler having high strength, good bio-affinity and many surface wrinkles and ducts is acquired; by applying the membrane bio-filler to the membrane bioreactor, it is possible for microorganisms in wastewater to stably bond and quickly reproduce on the surface of the membrane bioreactor, and it is also possible to keep high transmission efficiency between the bio-filler and oxygen in the membrane bioreactor, time for forming biofilm of the microorganisms in the wastewater onto the surface of the bio-filler is shortened, the proportion and activity of aerobic microorganisms in the biological membrane attaching to the surface of the bio-filler are increased, and accordingly wastewater degrading efficiency of the membrane bioreactor is improved.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a biofilm filler, a preparation method thereof and a biofilm reactor. Background technique [0002] In recent years, with the rapid economic development, my country has also brought a series of environmental problems while pursuing GDP growth. Among them, the shortage of fresh water resources makes urban domestic sewage treatment technology particularly important. However, with the improvement of people's living standards, the content of nitrogen and phosphorus in urban domestic sewage increases, and the organic components are complex. The traditional biological sewage treatment technology has been unable to keep up with the pace, and the treatment effect is not good. The characteristics of high efficiency, less residual sludge production, and convenient operation and management have been rapidly developed, and have broad application prospects in sewage treatment. [0...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCC02F3/107Y02W10/10
Inventor 蒋树贤付丰连张智远李冬梅
Owner GUANGDONG UNIV OF TECH
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