Method for treating polluted water body by synchronous nitrification and denitrification biological carrier coupling system

A biological carrier and simultaneous nitrification technology, which is applied in the treatment of granular microbial carriers, biological water/sewage treatment, chemical instruments and methods, etc., can solve the problems of waste of resources and increase the burden on the environment, save energy and accelerate nuclear growth. Effects of Speed, Mechanical Strength, and Stability Gains

Active Publication Date: 2021-05-04
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country is a large agricultural production country. Every year, a large amount of agricultural waste such as corncobs, rice stalks, and rice husks is produced. Most of them can only be discarded or used as fuel for farmers, which not only causes a great waste of resources but also increases the burden on the environment.

Method used

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  • Method for treating polluted water body by synchronous nitrification and denitrification biological carrier coupling system
  • Method for treating polluted water body by synchronous nitrification and denitrification biological carrier coupling system
  • Method for treating polluted water body by synchronous nitrification and denitrification biological carrier coupling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] This embodiment provides a simultaneous nitrification and denitrification biological carrier coupling system, which is constructed by the following steps:

[0073] 1) Preparation of degradable cellulose carrier:

[0074] Add 20g of straw pulp into 500g of glutaric acid, heat to 110°C to melt the glutaric acid, stir at 400r / min for 2h for pre-hydrolysis, and shear the pre-hydrolyzed product (temperature is 50°C, shear rate 6000r / min, the time is 45min), to obtain the carboxylated cellulose suspension, then the carboxylated cellulose suspension was centrifugally washed 5 times with deionized water, the acid solution was removed, and the carboxylated cellulose was obtained by drying at 70°C; 10 g carboxylated cellulose The cellulose was ultrasonically dispersed in 180g of deionized water, the ultrasonic frequency was 20kHz, and the power density was 0.3W / cm 2 , add 2.6g maleopimaric acid diimide, stir for 20min, heat up to 160°C at a rate of 8°C / min, after the reaction p...

Embodiment 2

[0086] This example provides another simultaneous nitrification and denitrification biological carrier coupling system, the specific steps are basically the same as in Example 1, the difference is that in this example, in the process of preparing degradable cellulose carrier, carboxylated cellulose, Malay The addition amounts of pimaric acid diimide were 10 g and 1.5 g, respectively, and the grafting rate of maleopimaric acid diimide-grafted cellulose was 12.1%.

Embodiment 3

[0088] This example provides another simultaneous nitrification and denitrification biological carrier coupling system, the specific steps are basically the same as in Example 1, the difference is that in this example, in the process of preparing degradable cellulose carrier, carboxylated cellulose, Malay The addition amounts of pimaric acid diimide were 10 g and 2.1 g, respectively, and the grafting rate of maleopimaric acid diimide-grafted cellulose was 18.7%.

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Abstract

The invention discloses a method for treating a polluted water body by a synchronous nitrification and denitrification biological carrier coupling system. A construction method of the synchronous nitrification and denitrification biological carrier coupling system comprises the following steps: 1) preparing a degradable cellulose carrier and biochar; 2) constructing a biological membrane device; 3) arranging the degradable cellulose carrier, the biochar and a conventional carrier in the biological membrane device, and adding functional bacteria to form the synchronous nitrification and denitrification biological carrier coupling system. The synchronous nitrification and denitrification biological carrier coupling system can quickly enrich functional microorganisms in a water body which is mainly polluted by ammonia nitrogen and nitrate nitrogen by utilizing the strong adsorption performance of a degradable cellulose carrier slow-release carbon source and biological carbon, so that an efficient denitrification effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of eutrophication water treatment, and in particular relates to a method for treating polluted water by a simultaneous nitrification and denitrification biological carrier coupling system. Background technique [0002] In recent years, with the rapid development of the village and town economy, the discharge of agricultural runoff such as farmland drainage, irrigation residual water, village sewage, and livestock and poultry breeding sewage has increased year by year. major factor in the deterioration. Nitrogen pollution is the most prominent in agricultural runoff, and reducing and intercepting nitrogen pollution in agricultural runoff is of great significance to improving water environment quality. [0003] Activated sludge technology and biofilm technology are the two most commonly used sewage treatment technologies in sewage biological treatment technology. Among them, biofilm technology refers to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/302C02F2101/16C02F2101/163C02F2003/003Y02W10/10
Inventor 谢忱颖冯丽娟张凯瑜叶晓芳
Owner ZHEJIANG OCEAN UNIV
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