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A biofilm reactor

A biofilm reactor and biofilm technology, applied in the field of water treatment, can solve the problems such as the adverse effect of the biofilm reactor film hanging time and sewage degradation efficiency, and inhibit the specific gravity and activity of aerobic microorganisms, so as to shorten the film hanging time, The effect of shortening the film hanging time and improving the specific gravity and activity

Active Publication Date: 2021-03-30
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the aeration tube and the filler are not directly connected, the oxygen content on the surface of the biofilm and in the sewage during the operation of the biofilm reactor is high, while the oxygen content inside the membrane is not high, resulting in most areas inside the biofilm It is in an anaerobic state, thereby inhibiting the specific gravity and activity of aerobic microorganisms on the biofilm, and adversely affecting the film-hanging time and sewage degradation efficiency of the biofilm reactor

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preparation example Construction

[0042] The preparation method of the above-mentioned biofilm filler is not particularly limited in the present invention, and is preferably prepared according to the following method:

[0043] a) mixing sludge biochar, walnut shell biochar, quicklime, Portland cement, aluminum powder and water to obtain slurry to be poured;

[0044] 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.

[0045] 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:

[0046] a1) mixing sludge biochar, walnut shell biochar, quicklime, Portland cement and water to obtain primary slurry;

[0047] a2) The primary slurry is mixed with aluminum powder to obtain the sl...

Embodiment 1

[0060] Preparation of biofilm filler

[0061] 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.

[0062] (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.

[0063] (2) Preparation of walnut shell bi...

Embodiment 2

[0068] Preparation of biofilm filler

[0069] 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.

[0070] (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.

[0071] (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 biological membrane reactor. The biological membrane reactor comprises a sewage reaction tank, an aeration pipe and biological membrane filler; the aeration pipe is arranged in the sewage reaction tank and provided with a plurality of air outlet positions, and the biological membrane filler is filled in the sewage reaction tank and connected with the air outlet positions. By connection of the biological membrane filler with the aeration pipe, internal aeration of the biological membrane filler can be realized so as to make the interior of a biological membrane in an aerobic state, activity and proportion of aerobic microorganisms on the biological membrane can be increased beneficially, membrane forming time of sewage microorganisms on the surface of the filler is further shortened, and sewage degradation efficiency is improved. According to experiments, compared with a traditional biological membrane reactor under same conditions, the biological membrane reactor has advantages that membrane forming time is shortened by 17 days, biological membrane thickness is increased by 10.42% after maturity, effluent TN is smaller than 10mg / L, COD is smaller than 50mg / L, and BOD is smaller than 10mg / L.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to 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. [0003] The so-called biofilm method refers to the method of treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02C02F3/10
CPCC02F3/02C02F3/107Y02W10/10
Inventor 蒋树贤张智远
Owner GUANGDONG UNIV OF TECH
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