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Sewage treatment method for simultaneously removing phosphor and nitrogen in process of reinforcing autotrophic denitrification of sulfur

A technology for synchronous denitrification and phosphorus removal and sewage treatment, which is applied in the fields of special compound water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., and can solve the problem of high calcium ion concentration in effluent and low utilization rate of carbon source , The effect of denitrification and phosphorus removal is difficult, etc., to achieve the effect of strengthening the denitrification effect, improving the utilization rate, and improving the phosphorus removal capacity

Active Publication Date: 2017-09-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the low utilization rate of siderite as a carbon source in the prior art, it is relatively difficult to simultaneously produce efficient nitrogen and phosphorus removal effects in the actual sewage treatment process, and the concentration of calcium ions in the effluent is too high, the present invention provides a pyrite Combination of ore, sulfur and siderite as a method for enhanced removal of nitrate nitrogen and phosphate phosphorus from wastewater

Method used

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  • Sewage treatment method for simultaneously removing phosphor and nitrogen in process of reinforcing autotrophic denitrification of sulfur
  • Sewage treatment method for simultaneously removing phosphor and nitrogen in process of reinforcing autotrophic denitrification of sulfur
  • Sewage treatment method for simultaneously removing phosphor and nitrogen in process of reinforcing autotrophic denitrification of sulfur

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Effect test

Embodiment 1

[0051] This embodiment is a combination of pyrite+sulfur+siderite.

[0052] Take 9g of pyrite particles to be used, 3g of sulfur particles and 3g of siderite particles and put them into the reaction container. In this embodiment, the mass ratio of pyrite, sulfur and siderite is 9:3:3.

[0053] Then add 50mL containing 30mg / L NO to the reaction vessel 3 - -N, 6.2mg / L PO 4 3- -P waste water.

[0054] Then add 3.5mL sulfur autotrophic denitrifying bacteria bacterium liquid (bacteria liquid volume accounts for 7% of waste water volume) in reaction vessel, blow off oxygen with nitrogen of above-mentioned mixed solution, then cover and seal and carry out denitrification reaction process, cultivate 12 days , respectively on the 2nd, 4th, 6th, 8th, 12th day 3 - -N, PO 4 3- -P concentration was detected.

Embodiment 2

[0077] This implementation is the combination mode of pyrite+sulfur+siderite, and the preparation process of pyrite, sulfur and siderite is the same as that in embodiment 1.

[0078] Take 12g of pyrite particles, 3g of sulfur particles and 1g of siderite particles and put them into the reaction container. In this embodiment, the mass ratio of pyrite, sulfur and siderite is 12:3:1.

[0079] Then add 50mL containing 30mg / L NO to the reaction vessel 3 - -N, 6.2mg / L PO 4 3- -P waste water.

[0080] Then add 2.5mL sulfur autotrophic denitrifying bacteria bacterium liquid (bacteria liquid volume accounts for 5% of waste water volume) in reaction vessel, blow off oxygen with nitrogen of above-mentioned mixed solution, then cover and seal and carry out denitrification reaction process, cultivate 12 days , for NO in wastewater every day 3 - -N, PO 4 3- -P concentration was detected.

[0081] As a result, in the denitrification system, nitrogen was completely removed after 10 d...

Embodiment 3

[0083] This implementation is the combination mode of pyrite+sulfur+siderite, and the preparation process of pyrite, sulfur and siderite is the same as that in embodiment 1.

[0084]The preparation process of pyrite, sulfur and siderite in the present embodiment is the same as in embodiment 1.

[0085] Take 3g of pyrite particles, 3g of sulfur particles and 1g of siderite particles and put them into the reaction container. In this embodiment, the mass ratio of pyrite, sulfur and siderite is 3:3:1.

[0086] Then add 50mL containing 1mg / L NO to the reaction vessel 3 - -N, 3mg / L PO 4 3- -P waste water.

[0087] Then add 1 mL of sulfur autotrophic denitrifying bacteria liquid (the volume of the bacterial liquid accounts for 2% of the waste water volume) in the reaction vessel, blow the above-mentioned mixed solution with argon to remove oxygen, then cover and seal to carry out the denitrification reaction process, and cultivate for 7 days , for NO in wastewater every day 3 ...

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Abstract

The invention discloses a sewage treatment method for simultaneously removing phosphor and nitrogen in a process of reinforcing autotrophic denitrification of sulfur and belongs to the technical field of sewage treatment. According to the method, pyrite, sulfur and siderite are adopted for strengthening a denitrification process of the wastewater and the effect of simultaneously removing phosphor and nitrogen is promoted. According to the method, pyrite and sulfur are used as sulfur sources and siderite is used as a carob source in a reaction system. The synergistic effect of the pyrite and sulfur can strengthen the utilization of the thalli for the siderite, so that the denitrification capacity can be reinforced. The ferric and ferrous ions, which are released by pyrite and siderite, and phosphate radical ions can form the ferric phosphate sediment, so that the dephosphorization capacity is reinforced. The method has an excellent effect, is low in cost and is suitable for engineering application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a method for synchronous denitrification and dephosphorization of sewage, more specifically, relates to a sewage treatment for synchronously removing nitrate nitrogen and phosphate phosphorus in sewage by using pyrite, sulfur and siderite method. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, a large amount of nutrients such as nitrogen and phosphorus have entered the water body, resulting in severe trophication of the water body. In order to control water pollution, the state has invested heavily in the construction of sewage treatment facilities. [0003] At present, sewage treatment methods can be roughly divided into three types: physical method, biological method and chemical method. In the actual sewage treatment process, several methods are often combined to improve the treatment effect. With ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/00C02F3/30C02F101/10C02F101/16
CPCC02F3/00C02F3/305C02F3/308C02F3/345C02F2305/06C02F2101/105C02F2101/163
Inventor 李睿华葛志斌王卫沈建华肖才林李甫昌张永威邱江坤陆杰
Owner NANJING UNIV
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