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Denitrifying and dephosphorizing activated biocarrier, preparation method thereof and application thereof

A technology of nitrogen and phosphorus removal and biological carrier, applied in the direction of biological treatment devices, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of local pH being too low, the inability to achieve deep removal of soluble phosphate, and uneven distribution And other issues

Active Publication Date: 2018-12-18
北京中持碧泽环境技术有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Some sewage treatment processes are also disclosed in the prior art, but either the effluent hardness is high and the deep removal of soluble phosphate cannot be achieved, or the sulfur bed is prone to local overacidity, which affects the treatment effect, or due to uneven distribution , Local pH is too low, etc., resulting in a decrease in reaction efficiency
[0006] It can be seen that there is no integrated synchronous nitrogen and phosphorus removal biological carrier with the characteristics of tight combination of functional components and self-maintenance of acid-base balance.

Method used

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  • Denitrifying and dephosphorizing activated biocarrier, preparation method thereof and application thereof
  • Denitrifying and dephosphorizing activated biocarrier, preparation method thereof and application thereof
  • Denitrifying and dephosphorizing activated biocarrier, preparation method thereof and application thereof

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preparation example Construction

[0030] The invention also discloses a preparation method of a nitrogen and phosphorus removal active biological carrier, which comprises the following steps:

[0031] Pretreatment of sulfur and siderite;

[0032] Melting sulfur into a liquid state at 119-160°C, preferably 120-150°C, more preferably 130-140°C;

[0033] Maintain the above temperature, add siderite into the above liquid sulfur, stir and mix at a stirring speed of 400-700 rpm, preferably 410-600 rpm, more preferably 430-500 rpm, for 30-300 seconds, preferably 35-120 seconds, more preferably 40-70 rpm One second to get a mixture;

[0034] Put the above mixed solution into the cooling water at 4-80°C, preferably 20-70°C, more preferably 45-65°C through the mixed liquid distributor that controls the flow rate of the mixed liquid, and cool and shape for 0.5-10 minutes, preferably 1-7 minutes, more preferably 1 to 3 minutes, the mixed liquid outflow rate of the mixed liquid distributor is controlled at 0.75 to 3ml / ho...

Embodiment 1

[0044] The nitrogen and phosphorus removal active biological carrier is prepared according to the composition of 50% sulfur and 50% siderite by mass ratio, and the specific preparation method is as follows:

[0045] 1. Add solid sulfur into the heating kettle, heat and melt it into liquid sulfur at 140°C, filter the liquid sulfur in stages to remove impurities with a particle size larger than 0.9 μm, and keep the temperature of the heating kettle at 140°C;

[0046] 2. Add the under-screened siderite sieved through a 60-mesh sieve to the liquid sulfur in the heating kettle in a ratio of 1:1 to the mass ratio of sulfur;

[0047] 3. Control the temperature in the heating kettle at 140°C, stir and mix the mixture of siderite and sulfur at a frequency of 450rpm for 2 minutes;

[0048] 4. The sulfur-siderite mixed solution is evenly and stably injected into the cooling water through the mixed solution distributor, and the flow rate is 3 ml per minute per hole;

[0049] 5. Cool the ...

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Abstract

The invention relates to a denitrifying and dephosphorizing activated biocarrier, a preparation method thereof and application thereof. The denitrifying and dephosphorizing biocarrier is formed by existing sulfur and siderite through a physical process, wherein a base is sulfur, and a large number of siderite particles are embedded on the surface and the inside of the biocarrier. A mass ratio of the sulfur to the siderite is from 1:9 to 9:1. The sulfur and the siderite are physically fused together to prepare the integrated composite biocarrier having a novel structure without changing the composition thereof; the sulfur in the novel structure can participate in a denitrification process to achieve deep denitrifying; the siderite can assist in automatic pH adjustment; generated ferrous ions can be used for phosphorus removal and denitrification denitrifying processes; filling can be completed conveniently and quickly when needed, and the material uniformity is good.

Description

technical field [0001] The invention belongs to the field of advanced treatment of sewage (waste) water, and in particular relates to an active biological carrier for nitrogen and phosphorus removal that can be used for deep nitrogen and phosphorus removal of sewage (waste) water, a preparation method and application thereof. Background technique [0002] With the continuous development of economy and society, the pollution of rivers is increasing day by day, and the carrying capacity of rivers to nitrogen, phosphorus and other elements that are easy to cause eutrophication is gradually saturated. In order to protect the water ecological environment from the source and reduce the amount of nitrogen and phosphorus elements artificially discharged into natural water bodies, the country and various provinces and cities have put forward stricter sewage discharge requirements for sewage treatment plants, especially in Beijing and other cities in terms of COD, total nitrogen The r...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/16
CPCC02F3/34C02F2101/105C02F2101/16C02F2203/006
Inventor 程浩毅王爱杰王树森朱婷婷
Owner 北京中持碧泽环境技术有限责任公司
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