CN109704521B - Integrated treatment equipment for enhanced denitrification of high-ammonia-nitrogen water body and wastewater treatment method - Google Patents

Integrated treatment equipment for enhanced denitrification of high-ammonia-nitrogen water body and wastewater treatment method Download PDF

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CN109704521B
CN109704521B CN201910114494.9A CN201910114494A CN109704521B CN 109704521 B CN109704521 B CN 109704521B CN 201910114494 A CN201910114494 A CN 201910114494A CN 109704521 B CN109704521 B CN 109704521B
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tank
unit
layer
algae
floating algae
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CN109704521A (en
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张杭君
叶雪平
陈彬
唐娟
周东仁
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Hangzhou Normal University
Zhejiang Institute of Freshwater Fisheries
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Hangzhou Normal University
Zhejiang Institute of Freshwater Fisheries
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Abstract

The invention discloses a high ammonia nitrogen water body enhanced denitrification integrated treatment device and a wastewater treatment method. Currently, the amount of industrial wastewater and the amount of domestic sewage increase year by year, and the problem of water pollution is increasingly prominent. The invention relates to enhanced denitrification integrated treatment equipment for a high ammonia nitrogen water body, which comprises a floating algae reaction unit, a multi-medium biomembrane filtering layer unit and a microorganism reaction unit which are sequentially arranged from top to bottom. The multi-medium biomembrane filtering layer unit is divided into a filtering tank and an overflow tank. An algae inhibiting layer, a phosphorus removal adsorbent layer, a sand stone layer and a gravel layer are arranged in the filter tank from top to bottom in sequence. The top of the water inlet end of the multi-medium biomembrane filtering layer unit is connected with the bottom of the water outlet end of the floating algae reaction unit. The bottom of the overflow tank is communicated with the bottom of the water inlet end of the microbial reaction unit. The invention reduces the concentration of nitrogen element in the wastewater through the biodegradation of algae, improves the wastewater treatment effect, and effectively avoids the growth of microorganisms inhibited by high-concentration ammonia nitrogen.

Description

Integrated treatment equipment for enhanced denitrification of high-ammonia-nitrogen water body and wastewater treatment method
Technical Field
The invention belongs to the technical field of high ammonia nitrogen water body treatment, and particularly relates to high ammonia nitrogen water body enhanced denitrification integrated treatment equipment and a wastewater treatment method.
Background
With the development of modern industrial society and the improvement of the living standard of human beings, the amount of industrial wastewater and the amount of domestic sewage increase year by year, the problem of water pollution is increasingly prominent, and available fresh water resources are less and less. Therefore, the treatment of water pollution is urgent.
In the age of rapid development of economy, the material demand is no longer the only standard for measuring the living standard of the national standard, and the environmental protection problem is more urgent and important in the national development. At present, the discharge load of industrial, agricultural and domestic pollutants in China is increasing day by day, the total discharge amount of national chemical oxygen demand is 2294.6 ten thousand tons, the total discharge amount of ammonia nitrogen is up to 238.5 ten thousand tons, and the environmental capacity is far exceeded. Therefore, in order to protect the ecological environment of lakes and oceans, how to effectively reduce the emission of nitrogen in domestic sewage is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a high ammonia nitrogen water body enhanced denitrification integrated treatment device and a wastewater treatment method.
The invention relates to enhanced denitrification integrated treatment equipment for a high ammonia nitrogen water body, which comprises a floating algae reaction unit, a multi-medium biomembrane filtering layer unit and a microorganism reaction unit which are sequentially arranged from top to bottom. And a wastewater inlet is formed in the top of the water inlet end of the floating algae reaction unit. The bottom of the spiral push flow type floating reaction unit is provided with a plurality of spiral push flow type floating algae reactors. The spiral push-flow type floating algae reactor comprises a columnar substrate and floating algae. The floating algae is wound on the columnar substrate.
The top of the water inlet end of the multi-medium biomembrane filtering layer unit is connected with the bottom of the water outlet end of the floating algae reaction unit. A first overflow plate is fixed in the multi-medium biomembrane filtering layer unit. The first overflow plate divides the multi-medium biomembrane filtering layer unit into a filtering tank and an overflow tank. The filter tank is internally provided with an algae inhibiting layer, a dephosphorization adsorbent layer, a sand stone layer and a gravel layer which are sequentially arranged from top to bottom.
The bottom of an overflow tank in the multi-medium biomembrane filtering layer unit is communicated with the bottom of the water inlet end of the microorganism reaction unit. And a second overflow plate and a third overflow plate are fixed in the middle of the microbial reaction unit. The second overflow plate and the third overflow plate divide the microbial reaction unit into a first microbial reaction tank, a second microbial reaction tank and a clean water tank which are sequentially arranged from the water inlet end to the water outlet end of the microbial reaction unit. The bottoms of the first microbial reaction tank and the second microbial reaction tank are both provided with a nano aeration device.
A plurality of biofilm reactors are arranged in the first microbial reaction pool. The biofilm reactor is plate-shaped. Nitrobacteria are arranged on the outer side surface of the biofilm reactor. And a plurality of immobilized microorganism reaction columns are arranged in the second microorganism reaction tank. The immobilized microorganism reaction column is columnar, and the side part of the immobilized microorganism reaction column is provided with a plurality of through holes. Aerobic denitrifying bacteria are arranged in the through hole of the immobilized microorganism reaction column.
Furthermore, a first electromagnetic on-off valve is arranged at the wastewater inlet. A first liquid level sensor is arranged in the floating algae reaction unit. And a second liquid level sensor is arranged in the filtering tank.
Further, the floating algae is watermifoil.
Furthermore, a second electromagnetic on-off valve is arranged at the joint of the top of the water inlet end of the multi-medium biomembrane filtering layer unit and the bottom of the water outlet end of the floating algae reaction unit.
Furthermore, natural moss is arranged in the algae inhibiting layer.
Furthermore, a dephosphorizing agent algistat filter material is arranged in the dephosphorizing adsorbent layer.
Furthermore, a clear water outlet is formed in the top of the clear water tank.
The wastewater treatment method of the high ammonia nitrogen water body enhanced denitrification integrated treatment equipment comprises the following steps:
step one, injecting treated wastewater into a floating algae reaction unit. The floating algae in the floating algae reaction unit pretreats the high ammonia nitrogen wastewater, so that part of nitrogen elements in the high ammonia nitrogen wastewater is biodegraded by the floating algae.
And step two, the treated wastewater passing through the floating algae reaction unit enters a filtering tank of the multi-medium biomembrane filtering layer unit. The algicide layer in the filter tank slowly releases allelochemicals in the bryophytes into the water body through the leaching action of water, and inhibits the growth of algae carried by the floating algae reaction unit. The cation adsorbent in the dephosphorization adsorbent layer adsorbs phosphorus in the treated wastewater. The sand stone layer and the gravel layer carry out physical interception on particles with larger particle sizes in the water.
And step three, starting the nano aeration devices in the first microbial reaction tank and the second microbial reaction tank. The treated wastewater treated by the multi-medium biomembrane filtering layer unit enters a first microbial reaction tank after passing through an overflow tank. Nitrifying bacteria in the first microbial reaction tank carry out secondary denitrification on the treated wastewater.
And step four, the treated wastewater treated by the first microbial reaction tank enters a second microbial reaction tank. The aerobic denitrifying bacteria in the second microbial reaction tank deeply denitrify the treated wastewater. So that the nitrogen content of the treated wastewater meets the discharge standard.
And step five, the treated wastewater treated by the second microbial reaction tank enters a clean water tank for precipitation to obtain clean water.
The invention has the beneficial effects that:
1. according to the invention, the algae is used for pretreating the high ammonia nitrogen wastewater, so that the concentration of nitrogen elements in the wastewater is reduced, the wastewater treatment effect is improved, and the growth of microorganisms inhibited by the high-concentration ammonia nitrogen is effectively avoided.
2. The algae inhibiting layer arranged in the filter tank can inhibit the growth of algae in the treated wastewater, so that secondary pollution of the algae in the floating algae reaction unit to the treated wastewater is avoided.
3. The invention fully utilizes the denitrification function of functional microorganisms, takes the ammonia nitrogen in the water as nutrient substances for the growth of the microorganisms, and can greatly reduce the concentration of the ammonia nitrogen in the water by denitrifying the water body by stages;
4. the invention has the advantages of small occupied area, simple equipment operation, no need of personnel management and easy maintenance, is one of high-efficiency equipment for treating the high-ammonia nitrogen wastewater, and has wide application prospect.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figure 1, the integrated treatment equipment for enhanced denitrification of the high ammonia nitrogen water body comprises a floating algae reaction unit 2, a multi-medium biomembrane filter layer unit 3 and a microorganism reaction unit which are sequentially arranged from top to bottom. The top of the water inlet end of the floating algae reaction unit 2 is provided with a wastewater inlet 1. A first electromagnetic on-off valve is arranged at the wastewater inlet 1. The bottom of the spiral plug-flow type floating reaction unit 2 is provided with a plurality of spiral plug-flow type floating algae reactors which are sequentially arranged from the water inlet end to the water outlet end. The spiral push-flow type floating algae reactor comprises a columnar substrate and floating algae. The floating algae is wound on the columnar substrate. The floating algae is Foliumet Sargassum. Each spiral plug flow type floating algae reactor can be detached and replaced independently. A first liquid level sensor is arranged in the floating algae reaction unit 2.
The top of the water inlet end of the multi-medium biomembrane filtering layer unit 3 is connected with the bottom of the water outlet end of the floating algae reaction unit 2 through a second electromagnetic on-off valve. A first overflow plate is fixed at the water outlet end of the multi-medium biomembrane filtering layer unit 3. The first overflow plate divides the multi-medium biomembrane filtering layer unit 3 into a filtering tank connected with the floating algae reaction unit and an overflow tank 9. An algae inhibiting layer 10-1, a dephosphorization adsorbent layer 10-2, a gravel layer 10-3 and a gravel layer 10-4 are arranged in the filter tank from top to bottom in sequence. Natural moss is arranged in the algae inhibiting layer 10-1. The phosphorus removal adsorbent layer 10-2 is internally provided with a phosphorus removal agent and algae inhibitor filter material (in the embodiment, a cation adsorbent is adopted). And a second liquid level sensor is arranged in the filtering tank.
The bottom of the overflow tank 9 in the multi-medium biomembrane filtering layer unit 3 is communicated with the bottom of the water inlet end of the microorganism reaction unit. The middle part of the microorganism reaction unit is fixed with a second overflow plate and a third overflow plate. The second overflow plate and the third overflow plate divide the microbial reaction unit into a first microbial reaction tank 4, a second microbial reaction tank 8 and a clean water tank 6 which are sequentially arranged from the water inlet end to the water outlet end of the microbial reaction unit. The bottoms of the first microbial reaction tank 4 and the second microbial reaction tank 8 are both provided with a nano aeration device 5. The air inlet of the nano aeration device 5 is provided with a one-way air stop valve. The top of the clean water tank 6 is provided with a clean water outlet 7. The clean water tank 6 is used for final precipitation treatment.
A plurality of biofilm reactors are arranged in the first microbial reaction tank 4. The biofilm reactor is plate-shaped. Nitrobacteria are attached to the outer side surface of the biofilm reactor. The ammonia nitrogen in the treated wastewater is degraded into nitrate nitrogen by nitrifying bacteria. A plurality of immobilized microorganism reaction columns are arranged in the second microorganism reaction tank 8. The immobilized microorganism reaction column is columnar, and the side part is provided with a plurality of through holes. Aerobic denitrifying bacteria are arranged in the through holes of the immobilized microorganism reaction column, and nitrate nitrogen in water is finally converted into nitrogen through a series of biological reactions by the aerobic denitrifying bacteria. Because the aerobic nitrifying bacteria have larger oxygen demand and the aerobic denitrifying bacteria have smaller oxygen demand, the aerobic denitrifying bacteria are arranged in the holes to reduce the oxygen content in the environment where the aerobic denitrifying bacteria are located, and further ensure that the aerobic denitrifying bacteria and the nitrifying bacteria (which are aerobic and have different optimal oxygen content ranges) respectively keep higher activity in the same water tank.
The wastewater treatment method of the high ammonia nitrogen water body enhanced denitrification integrated treatment equipment comprises the following steps:
step one, injecting the treated wastewater into the floating algae reaction unit 2. The floating algae in the floating algae reaction unit 2 pretreats the high ammonia nitrogen wastewater, so that part of nitrogen elements in the high ammonia nitrogen wastewater is biodegraded by the floating algae.
And step two, after 8 hours, the second electromagnetic on-off valve is opened, so that the treated wastewater passing through the floating algae reaction unit 2 enters a filtering tank of the multi-medium biomembrane filtering layer unit 3. The algicide layer in the filter tank slowly releases allelochemicals in the bryophytes into the water body through the leaching action of water, inhibits the growth of algae carried by the floating algae reaction unit 2, and avoids the problem of secondary pollution. The cation adsorbent in the dephosphorization adsorbent layer adsorbs phosphorus in the treated wastewater, so that the concentration of the phosphorus in the treated wastewater is reduced. The sand stone layer and the gravel layer carry out physical interception on particles with larger particle sizes in the water, and then the content of suspended particles in the water is reduced.
And step three, starting the nano aeration devices in the first microbial reaction tank and the second microbial reaction tank. The treated wastewater treated by the multi-medium biomembrane filtering layer unit 3 enters the first microorganism reaction tank after passing through the overflow tank. Nitrifying bacteria in the first microbial reaction tank carry out secondary denitrification on the treated wastewater.
And step four, the treated wastewater treated by the first microbial reaction tank enters a second microbial reaction tank. The aerobic denitrifying bacteria in the second microbial reaction tank deeply denitrify the treated wastewater. So that the nitrogen content of the treated wastewater meets the discharge standard.
And step five, the treated wastewater treated by the second microbial reaction tank enters a clean water tank for precipitation to obtain clean water. The clean water is discharged to the outside from the clean water outlet 7.

Claims (8)

1. The utility model provides a denitrogenation integration treatment facility is reinforceed to high ammonia nitrogen water, includes the microbiological reaction unit, its characterized in that: the floating algae reaction unit and the multi-medium biomembrane filtering layer unit are sequentially arranged from top to bottom; a wastewater inlet is formed in the top of the water inlet end of the floating algae reaction unit; the bottom of the spiral plug flow type floating algae reaction unit is provided with a plurality of spiral plug flow type floating algae reactors; the spiral plug flow type floating algae reactor comprises a columnar substrate and floating algae; floating algae is wound on the columnar substrate;
the top of the water inlet end of the multi-medium biomembrane filtering layer unit is connected with the bottom of the water outlet end of the floating algae reaction unit; a first overflow plate is fixed in the multi-medium biomembrane filtering layer unit; the first overflow plate divides the multi-medium biomembrane filtering layer unit into a filtering tank and an overflow tank; the filter tank is internally provided with an algae inhibiting layer, a dephosphorization adsorbent layer, a sand stone layer and a gravel layer which are sequentially arranged from top to bottom;
the bottom of the filter tank in the multi-medium biomembrane filter layer unit is communicated with the bottom of the water inlet end of the microbial reaction unit; a second overflow plate and a third overflow plate are fixed in the middle of the microbial reaction unit; the second overflow plate and the third overflow plate divide the microbial reaction unit into a first microbial reaction tank, a second microbial reaction tank and a clean water tank which are sequentially arranged from the water inlet end to the water outlet end of the microbial reaction unit; the bottoms of the first microbial reaction tank and the second microbial reaction tank are provided with nano aeration devices;
a plurality of biofilm reactors are arranged in the first microbial reaction tank; the biofilm reactor is plate-shaped; nitrobacteria are arranged on the outer side surface of the biofilm reactor; a plurality of immobilized microorganism reaction columns are arranged in the second microorganism reaction tank; the immobilized microorganism reaction column is columnar, and the side part of the immobilized microorganism reaction column is provided with a plurality of through holes; aerobic denitrifying bacteria are arranged in the through hole of the immobilized microorganism reaction column.
2. The integrated treatment equipment for enhanced nitrogen removal of the high ammonia nitrogen water body according to claim 1, which is characterized in that: a first electromagnetic on-off valve is arranged at the wastewater inlet; a first liquid level sensor is arranged in the floating algae reaction unit; and a second liquid level sensor is arranged in the filtering tank.
3. The integrated treatment equipment for enhanced nitrogen removal of the high ammonia nitrogen water body according to claim 1, which is characterized in that: the floating algae is Foliumet algae.
4. The integrated treatment equipment for enhanced nitrogen removal of the high ammonia nitrogen water body according to claim 1, which is characterized in that: and a second electromagnetic on-off valve is arranged at the joint of the top of the water inlet end of the multi-medium biomembrane filtering layer unit and the bottom of the water outlet end of the floating algae reaction unit.
5. The integrated treatment equipment for enhanced nitrogen removal of the high ammonia nitrogen water body according to claim 1, which is characterized in that: the algae inhibiting layer is internally provided with natural moss.
6. The integrated treatment equipment for enhanced nitrogen removal of the high ammonia nitrogen water body according to claim 1, which is characterized in that: and a dephosphorizing agent algistat filter material is arranged in the dephosphorizing adsorbent layer.
7. The integrated treatment equipment for enhanced nitrogen removal of the high ammonia nitrogen water body according to claim 1, which is characterized in that: and a clear water outlet is formed in the top of the clear water tank.
8. The wastewater treatment method of the integrated treatment equipment for enhanced nitrogen removal of the high ammonia-nitrogen water body according to claim 5, which is characterized in that: step one, injecting treated wastewater into a floating algae reaction unit; the floating algae in the floating algae reaction unit pretreats the high ammonia nitrogen wastewater, so that part of nitrogen elements in the high ammonia nitrogen wastewater are biodegraded by the floating algae;
step two, the treated wastewater passing through the floating algae reaction unit enters a filter tank of a multi-medium biomembrane filter layer unit; the algicide layer in the filter tank slowly releases allelochemicals in the bryophytes into the water body through the leaching action of water, and inhibits the growth of algae carried by the floating algae reaction unit; a cation adsorbent in the dephosphorization adsorbent layer adsorbs phosphorus in the treated wastewater; the sand stone layer and the gravel layer carry out physical interception on the particles with larger particle size in the water;
step three, starting the nano aeration devices in the first microbial reaction tank and the second microbial reaction tank; the treated wastewater treated by the multi-medium biomembrane filtering layer unit enters a first microbial reaction tank after passing through an overflow tank; nitrifying bacteria in the first microbial reaction tank carry out secondary denitrification on the treated wastewater;
step four, the treated wastewater treated by the first microbial reaction tank enters a second microbial reaction tank; aerobic denitrifying bacteria in the second microbial reaction tank carry out deep denitrification on the treated wastewater; so that the nitrogen content of the treated wastewater meets the discharge standard;
and step five, the treated wastewater treated by the second microbial reaction tank enters a clean water tank for precipitation to obtain clean water.
CN201910114494.9A 2019-02-14 2019-02-14 Integrated treatment equipment for enhanced denitrification of high-ammonia-nitrogen water body and wastewater treatment method Active CN109704521B (en)

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