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Water pump-driving baffling internal circulation bioreactor and use method thereof

A bioreactor, driven technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the problems of secondary pollution, high energy consumption, large amount of sludge, etc. Ease of operation and the effect of reducing the amount of production

Inactive Publication Date: 2009-03-18
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reactor is still based on the principle of fluidized bed, which has the disadvantages of high energy consumption and complicated operation process.
The application number of the patent "circulating flow loop biological denitrification and phosphorus removal process" is 200710039886.0, and the circulation type biological denitrification and phosphorus removal process is also adopted, but it is mainly based on activated sludge. The amount of production is large, and there are also some problems such as heavy workload of sludge disposal and easy to produce secondary pollution.

Method used

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  • Water pump-driving baffling internal circulation bioreactor and use method thereof

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Effect test

Embodiment 1

[0045] A baffle type internal circulation bioreactor driven by a water pump 10 is used to continuously treat certain industrial waste water. The concentration of ammonia nitrogen in the wastewater is 20-25mg·L -1 , the total nitrogen concentration is about 35mg·L -1 , NaCl concentration is 3000~8000mg·L -1 scope. The wastewater is substantially free of bioavailable organic carbon sources. Before the treatment, first take the activated sludge for acclimatization and cultivation, and then inoculate the sludge containing halophilic microorganisms into the reactor, and a highly active biofilm will be formed on the baffle within 24 hours. During treatment, glucose solution or methanol is fed in proportion from the feeding port 6 as an additional organic carbon source to treat high-salt wastewater. The reactor can make the removal efficiency of ammonia nitrogen reach more than 99% and the removal rate of total nitrogen reach more than 75% within the residence time of 3 hours.

Embodiment 2

[0047] Bioremediation of urban river water using a pump-driven baffled internal circulation bioreactor. The concentration of ammonia nitrogen in river water is 5-20mg·L -1 , the total nitrogen concentration is 10~35mg·L -1 , the river water is pumped into the reactor, and the intermittent operation mode is adopted, and the water in the reactor is replaced 1 to 2 times a day. After about 5 days of operation, a biofilm with good activity can be formed. Then start continuous operation. During the continuous operation, control the water flow rate so that the hydraulic retention time is 1 to 5 hours. The removal rate of ammonia nitrogen in water reaches more than 99%, and the removal rate of total nitrogen reaches more than 85%.

Embodiment 3

[0049]A pump-driven baffle internal circulation bioreactor is used for continuous advanced treatment of effluent from urban sewage treatment plants. The effluent treated by the urban sewage treatment plant has an ammonia nitrogen concentration of 10-15 mg·L -1 , the total nitrogen concentration is 20~30mg·L -1 , the total phosphorus concentration is 0.5~1.0mg·L -1 , the effluent is continuously input into the reactor, and the influent flow rate is controlled so that the hydraulic retention time is 1 to 2 hours. During the operation, the flocculant is continuously fed in proportion, and after the treatment of the reactor, the removal rate of ammonia nitrogen in the water It can reach more than 90%, the removal of total nitrogen can reach more than 80%, and the removal rate of total phosphorus can reach more than 75%. The effluent from the reactor can be reused as reclaimed water after being sterilized.

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Abstract

The invention relates to a reactor which utilizes the biofilm technique to carry out nitrogen removal and phosphorus removal over wastewater and an application method thereof. The reactor is a water pump driven baffling internal recycle bioreactor; the box body is divided into an upper advection area and a lower baffling area; baffling plates (3) stretch out from the baffling area by turns and the baffling area is provided with a feeding port (6) and a monitoring and sampling port (8); the left side of the box body is externally provided with a circulating water pump (10) and a suction pipe and a water inlet pipe are respectively connected with a left side wall (11). The application method of the reactor is as follows: after wastewater to be treated is fed into the box body, the inlet and outlet flow rates are adjusted according to the nature of the wastewater so as to control residence time; dissolved oxygen is tested at the monitoring and sampling port (8) and the flow rate of the circulating water pump (10) is adjusted to control the concentration of the dissolved oxygen; an aerobic area and an anaerobic area form at the baffling area and an unwanted biofilm is released from a discharge port (7); treated water is discharged from a water outlet (2) or the discharge port (7). Biological nitrogen removal and phosphorus removal of wastewater are fulfilled by the biofilm, the reactor and the process are convenient to operate and can reduce the production amount of sludge, thus being conducive to popularization and application.

Description

(1) Technical field [0001] The invention relates to environmental engineering, biochemical reaction engineering, environmental biotechnology and water treatment technology, in particular to a biofilm reactor for denitrification and phosphorus removal of waste water by using biofilm technology. (2) Background technology [0002] As we all know, with the rapid development of social economy, a lot of industrial waste water rich in nitrogen and phosphorus is produced in large quantities, and these waste waters are discharged randomly or without advanced treatment, resulting in the surface water of many natural rivers, lakes, landscape waters, and even Drinking water sources have been polluted, and many natural water bodies have more or less formed eutrophication, mainly manifested in the serious excess of nitrogen and phosphorus elements in water bodies. These pollutions lead to the destruction of many functions of natural water bodies such as rivers, lakes and landscape waters,...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 张永明
Owner SHANGHAI NORMAL UNIVERSITY
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