Method and system for nitrogen and phosphorus removal via water treatment plant waste sludge (WTRs) reinforced tidal-flow reactor

A technology of nitrogen and phosphorus removal and tidal flow, applied in the field of environmental engineering, can solve the problem of low nitrogen and phosphorus removal rate, and achieve the effect of strengthening the action of microorganisms, improving the bacterial habitat and simple operation process.

Inactive Publication Date: 2015-07-22
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0005] The present invention provides a method and system for enhancing the effect of nitrogen and phosphorus removal in a tidal flow reactor using waste mud (WTRs) from a water purification plant as a matrix, and overcomes the low nitrogen and phosphorus removal rate in the existing tidal flow reactor sewage treatment method high problem

Method used

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  • Method and system for nitrogen and phosphorus removal via water treatment plant waste sludge (WTRs) reinforced tidal-flow reactor
  • Method and system for nitrogen and phosphorus removal via water treatment plant waste sludge (WTRs) reinforced tidal-flow reactor
  • Method and system for nitrogen and phosphorus removal via water treatment plant waste sludge (WTRs) reinforced tidal-flow reactor

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example 1

[0026] Example 1: Using waste sludge (WTRs) from a water purification plant in Beijing as raw material, the content of iron and aluminum in the waste sludge is 150 and 100mgg respectively -1 . The waste mud of the water purification plant is made into 1-3cm balls and dried naturally. The tidal flow reactor is a plexiglass cylinder with an inner diameter of 10 cm and a height of 100 cm. The bottom is laid with 10 cm high pebbles (6-10 mm) and 5 cm high quartz sand (2-6 mm). The prepared WTRs of about 1.7 kg are filled to a height of 75cm. Take 1 kg of sediment from a eutrophic lake in North China and add it to the tidal flow reactor. In addition, the second column enriched the sediment without WTRs and used it as a control. The operation cycle is 1 day, water inflow for 4 minutes, reaction for 21h53min, emptying for 3min, and idle for 2h. The daily processing capacity is 2.5L. Influent PO 43+ , NO 2 - and NO 3 - The average concentration is 3.5mg / L, 10mg / L and 5mg / L r...

example 2

[0027] Example 2: Also use waste mud (WTRs) from a water purification plant in Beijing as raw materials. The tidal flow reactor is a plexiglass cylinder with an inner diameter of 10 cm and a height of 100 cm. The bottom is laid with 10 cm high pebbles (6-10 mm) and 5 cm high quartz sand (2-6 mm). The prepared WTRs of about 1.7 kg are filled to a height of 75cm. Take 800g of sediment from a river polluted with high ammonia nitrogen in North China and add it to the tidal flow reactor. In addition, the second column enriched the sediment without WTRs and used it as a control. The operation cycle is 1 day, water inflow for 4 minutes, reaction for 21h53min, emptying for 3min, and idle for 2h. The daily processing capacity is 2.5L. Influent PO 4 3+ , NH 4 + , NO 2 - and NO 3 - The average concentrations were 3.5mg / L, 10mg / L, 10mg / L and 5mg / L, and PO in water was measured every 3 days 4 3+ , NH 4 + , NO 2 - and NO 3 - concentration. After 212 days of operation, th...

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Abstract

The invention provides a method and system for nitrogen and phosphorus removal via a WTRs-reinforced tidal-flow reactor, which belongs to the field of water treatment. According to the invention, WTRs is used as matrix, and a tidal-flow reactor is filled with WTRs; deposit is added to realize microbial inoculation of the tidal-flow reactor; and then synthesized waste water with high nitrogen-phosphorus content is added into the tidal-flow reactor, and treatment is carried out. The objective of the invention is to simulate eutrophicated river water and to simultaneously and highly-effectively eliminate nitrogen pollution and phosphorus pollution in the eutrophicated river water. The method and system are characterized in that all the matrix in the tidal-flow reactor is air-dried WTRs with a size of 1 to 3 cm, nitrogen in the tidal-flow reactor is removed mainly through microbial action, and phosphorus pollutants are removed mainly through physical and chemical absorption. According to the invention, the system has a simple structure and is easy to use; materials used in the invention have low cost and are environment-friendly; the method is simple to operate; and while WTRs are recycled, nitrogen and phosphorus pollutants in an eutrophicated water body are removed in virtue of the tidal-flow reactor, so the win-win objectives of waste recycling and ecological restoration are achieved.

Description

technical field [0001] The invention belongs to the field of water treatment or environmental engineering. Specifically, it is a method and system for using waste sludge from a water purification plant to strengthen the denitrification and dephosphorization of a tidal flow reactor. Background technique [0002] With the rapid development of urbanization and the continuous increase of various sewage discharges, rivers have undertaken a large amount of domestic sewage and production wastewater. In some cities in our country, the population density is too large and various pollutant discharge factors are increasing, the pollution of urban rivers is becoming more and more serious, and the pressure on river regulation is increasing. Taking North China as an example, most rivers are heavily polluted rivers with typical production and domestic wastewater and tail water from secondary sewage treatment plants as the main body. Conventional secondary sewage treatment plants remove a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F1/28
Inventor 裴元生王咨元白雷雷
Owner BEIJING NORMAL UNIVERSITY
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