Biological membrane reactor

A biofilm reactor and biofilm technology, applied in the field of water treatment, can solve the problems of biofilm reactor film-hanging time and sewage degradation efficiency, inhibit the specific gravity and activity of aerobic microorganisms, and shorten the film-hanging time, The effect of shortening the film hanging time and increasing the thickness of the biofilm

Active Publication Date: 2017-08-18
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

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Example Embodiment

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

[0043] a) Mix 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 gasses and solidifies in the mold to obtain a biofilm filler.

[0045] In the preparation method provided by the present 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) Mix 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 a slurry to be pou...

Example Embodiment

[0059] Example 1

[0060] Preparation of biofilm filler

[0061] The weight ratio of each component of the biofilm filler is as follows: aluminum powder (200 mesh) 0.35g, sludge biochar 30g, pozzolanic Portland cement (P.P32.5) 25g, walnut shell biochar 30g, lime 17g , 40g of water.

[0062] (1) Preparation of sludge biochar: The remaining sludge (water content of 55%) from a sewage treatment plant in Guangzhou is dehydrated and dried in an oven at 105°C to a constant weight, crushed into particles of about 0.5 mm, and then Move it into the muffle furnace to isolate the air and heat it to a constant temperature of 400°C and carbonize for 60 minutes, 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 as follows: the average particle size was 0.38mm and the specific surface area was 51.332m 2 / g, pore volume 0.04621cm 3 / g.

[0063] (2) ...

Example Embodiment

[0067] Example 2

[0068] Preparation of biofilm filler

[0069] The weight ratio of each component of the biofilm filler is as follows: 0.40g aluminum powder (300 mesh), 25g sludge biochar, 25g fly ash Portland cement (P.F42.5), 32g walnut shell biochar, Lime 18g, water 42g.

[0070] (1) Preparation of sludge biochar: The remaining sludge (60% moisture content) of a sewage treatment plant in Guangzhou is dehydrated and dried in an oven at 110 ℃ to a constant weight, crushed into particles of about 0.5 mm, and then Move it into the muffle furnace to isolate the air and heat it to 430℃ constant temperature carbonization for 1.2 hours, 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: pulverize...

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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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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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