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Biological aerated filter system with alkaline leaching excess sludge as filler, operating method of biological aerated filter system and preparing method of filler

A biological aerated filter and residual sludge technology, applied in the direction of water pollutants, sustainable biological treatment, chemical instruments and methods, etc., can solve the problems of easy plugging of fillers and stable operation of the filter system, and achieve low production costs, Improve decontamination efficiency and good removal efficiency

Inactive Publication Date: 2016-11-09
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems in the prior art that the fillers are easily clogged and affect the stable operation of the filter system, the present invention provides a biological aerated filter system using residual sludge from alkali leaching as filler, its operation method and filler preparation method

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  • Biological aerated filter system with alkaline leaching excess sludge as filler, operating method of biological aerated filter system and preparing method of filler

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preparation example Construction

[0064] A method for preparing fillers in a biological aerated filter system using residual sludge from alkali leaching as fillers, the steps of which are as follows:

[0065] Step 1. Wash the excess alkali leaching sludge to neutrality; the surface of the excess alkali leaching sludge is rough, loose and porous, and the interior also has a relatively rich pore structure, and its light weight and fine particles have the potential to be used as water treatment fillers; alkali leaching The remaining sludge is alkaline, which is not conducive to the attachment and growth of microorganisms, so it needs to be washed to neutrality, and the prepared filler layer 4 is conducive to the attachment and growth of microorganisms;

[0066] Step 2: After the alkali leaching residual sludge is dried, it is ground and sieved; the particle size of the sludge is reduced, and it is pretreated for calcination heat treatment, in order to obtain better filler performance;

[0067] Step 3. Preheat the...

Embodiment 1

[0084] Such as figure 1 As shown, a biological aerated filter system using residual alkali leaching sludge as filler, the inner diameter of the double-layer column is 24cm, the outer diameter is 30cm, the height of the inner column is 100cm, the height of the outer column is 95cm, and the effective volume is about It is 36L, the effective height of packing layer 4 is 50cm, and the height of ceramsite filter layer 3 is 20cm.

[0085] The selection of the ratio of the height of the filter to the inner diameter of the bottom only needs to ensure that the flow rate during operation is suitable for the dissolved oxygen in the system, and this specific value has been found to meet the requirements through experiments. The height of the packing layer and the height of the filter material area such as the ceramsite filter layer are determined based on comprehensive consideration of factors such as the organic pollution load and the resistance of the filter material layer; the water di...

Embodiment 2

[0087] see figure 1 , a biological aerated filter operating system using residual alkali leaching sludge as filler, the BAF tank body includes a water inlet 1, a filter layer 3, a packing layer 4, and a microporous aeration device 5 arranged in sequence from top to bottom And backwashing device 6, insulating glass wool 7, water outlet 2. The inner diameter of the double-layer cylinder is 24cm, the outer diameter is 30cm, the height of the inner column is 100cm, the height of the outer column is 95cm, the effective volume is about 36L, the effective height of the packing layer 4 is 50cm, and the height of the ceramsite filter layer 3 is 20cm. The filling rate of the ceramsite particles is above 90%. The ceramsite filter layer 3 is set to be distributed in the upper and lower layers. The average particle size ranges of the upper and lower layers are 10-12mm and 4-6mm respectively. 10cm.

[0088] The implementation steps of the film-hanging of the biological aerated filter syst...

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Abstract

The invention discloses a biological aerated filter system with alkaline leaching excess sludge as filler, an operating method of the biological aerated filter system and a preparing method of the filler, and belongs to the technical field of sewage disposal. The biological aerated filter system comprises a water inlet and a water outlet, and further comprises a filter layer, the filler, a microporous aeration device and a backwash device. The biological aerated filter system is provided with the filter layer, the microporous aeration device and the backwash device in sequence from top to bottom, the space between the filter layer and the microporous aeration device in the biological aerated filter system is filled with the filler, the water inlet is located in the top of the biological aerated filter system, the water outlet is located in the bottom of the biological aerated filter system, the space between an inner column layer and an outer column layer of the biological aerated filter system is sealed to be vacuum, and the outer surface of the inner column layer is closely wrapped with a heat insulation glass wool layer. Due to the heat insulation arrangement, the biological aerated filter system still has high ammonia nitrogen and phosphorus removing efficiency in cold winter. By the adoption of the up-to-bottom water inlet mode, the problem that filler is likely to cause blockage is relieved; meanwhile, the purpose of recycling the industrial waste alkaline leaching excess sludge is achieved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a biological aerated filter system using excess sludge from alkali leaching as a filler, an operation method thereof and a preparation method of the filler. Background technique [0002] With the rapid development of industry and agriculture, the discharge of various types of sewage continues to increase, and water pollution is becoming more and more serious. At the same time, as a large amount of domestic wastewater and industrial sewage containing nitrogen and phosphorus nutrients enter the natural water body, the degree of eutrophication of the water body will deepen, seriously destroying the ecological environment of the water body, and bringing huge damage to human health and the survival of aquatic organisms. threaten. [0003] Biological aerated filter (BAF) is a high-efficiency sewage treatment technology that integrates biofilm biodegradation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02C02F3/10C02F101/30C02F101/16
CPCC02F3/02C02F3/105C02F2101/105C02F2101/30C02F2101/16C02F2209/08C02F2209/10C02F2209/22C02F2209/14C02F2209/44C02F2303/14Y02W10/10
Inventor 孔明张毅敏纪中新汪龙眠彭福全杨飞
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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