A coupled biological treatment process for simultaneous removal of nitrogen and phosphorus from agricultural runoff

A biological treatment and runoff nitrogen technology, applied in the field of coupled biological treatment process, can solve problems such as eutrophication of lakes and reservoirs, pollution of drinking water sources, deterioration of water environment quality, etc., and achieve the reduction of effluent COD value, enhanced purification effect, and TP content Falling effect

Active Publication Date: 2020-11-17
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the pollution of drinking water sources, eutrophication of lakes and reservoirs, and the continuous deterioration of water environment quality caused by the above-mentioned agricultural and animal husbandry sewage, there is currently no good treatment process for agricultural and animal husbandry sewage with low carbon and high nitrogen and phosphorus content on the market To solve the problem, it provides a coupled biological treatment process for integrated treatment of agricultural and animal husbandry sewage, high portability, comprehensive treatment of various pollutants in sewage, and synchronous removal of agricultural runoff nitrogen and phosphorus

Method used

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  • A coupled biological treatment process for simultaneous removal of nitrogen and phosphorus from agricultural runoff

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Experimental program
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Effect test

Embodiment 1

[0042] The preparation process of special bio-modified filler includes the following steps:

[0043] a) Divide the citric acid into two equal parts by weight, dissolve bismuth nitrate pentahydrate and half of the citric acid in dilute nitric acid, stir evenly to form a solution A, dissolve the ammonium metavanadate and the remaining half of the citric acid in distilled water, Stir evenly to form B solution;

[0044] b) Mix A solution and B solution obtained in step a) uniformly to prepare C solution, use ammonia water to adjust the pH value of C solution to 6.2, and continue heating and stirring at 65°C until the solution turns blue to form a blue solution;

[0045] c) Add peanut shells or melon seed shells to the blue solution obtained in step 2), let stand, take out after the peanut shells or melon seed shells are fully absorbed on the surface to form a colloid, dry at 75°C for 24 hours, and then place at 500°C Calcined for 3 hours under the same conditions, and ground to o...

Embodiment 2

[0049] The preparation process of special bio-modified filler includes the following steps:

[0050] a) Divide the citric acid into two equal parts by weight, dissolve bismuth nitrate pentahydrate and half of the citric acid in dilute nitric acid, stir evenly to form a solution A, dissolve the ammonium metavanadate and the remaining half of the citric acid in distilled water, Stir evenly to form B solution;

[0051] b) Mix A solution and B solution obtained in step a) to prepare C solution evenly, use ammonia water to adjust the pH value of C solution to 6.5, and continue heating and stirring at 85°C until the solution turns blue to form a blue solution;

[0052] c) Add peanut shells or melon seed shells to the blue solution obtained in step 2), let stand, take out after the peanut shells or melon seed shells are fully absorbed on the surface to form a colloid, dry at 85°C for 48h, and then place at 550°C Calcined under conditions for 5 hours, and ground to obtain active part...

Embodiment 3

[0056] The preparation process of special bio-modified filler includes the following steps:

[0057] a) Divide the citric acid into two equal parts by weight, dissolve bismuth nitrate pentahydrate and half of the citric acid in dilute nitric acid, stir evenly to form a solution A, dissolve the ammonium metavanadate and the remaining half of the citric acid in distilled water, Stir evenly to form B solution;

[0058] b) Mix A solution and B solution obtained in step a) uniformly to prepare C solution, use ammonia water to adjust the pH value of C solution to 6.5, and continue heating and stirring at 75°C until the solution turns blue to form a blue solution;

[0059] c) Add peanut shells or melon seed shells to the blue solution obtained in step 2), let stand, take out after the peanut shells or melon seed shells are fully absorbed on the surface to form a colloid, dry at 80°C for 36h, and then place at 550°C Calcined under conditions for 5 hours, and ground to obtain active p...

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Abstract

The invention relates to a coupling biological treatment technology for synchronously removing nitrogen and phosphor in agricultural runoff. The coupling biological treatment technology is used for integrally treating the sewage in agriculture, living and livestock industries in rural areas, the carrying degree is high, and various pollutants in the sewage can be comprehensively treated. The coupling biological treatment technology is characterized that the beneficial effect of recycling and reutilizing the agricultural wastes is realized, the poisonous and harmful matter is not produced in the impurity removal and purifying process of wastewater, and the green, health and environment-friendly technology requirements are met; the required treatment equipment is simple, the use cost is lower, the integral operation and control are more convenient, and the efficiency is higher; the total removal rate of TN (total nitrogen) and TP (total phosphor) is high, the harmful organic matters in adeep oxidizing tank are thoroughly removed, and the purifying and dirt removal effects are higher; the modifying component is used for promoting the degradation-resistant organic pollutants in the sewage to be decomposed and degraded, and be converted into non-pollution substance or the substance which can be degraded again by microorganisms, and the microorganism degrading efficiency and effectare improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a coupling for integrated treatment of agricultural, domestic and animal husbandry sewage in rural areas, high portability, comprehensive treatment of various pollutants in sewage and synchronous removal of agricultural runoff nitrogen and phosphorus biological treatment process. 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 and phosphorus pollution is the most prominent in agricultural runoff. Reducing and intercepting nitrogen and phosphorus pollution in agricultural runoff is of great significance to improving water environment quality. At present, biofilm technology has attracted great attention be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/30C02F3/00C02F3/10C02F7/00C02F9/00C02F2001/007
Inventor 冯丽娟阳广凤穆军
Owner ZHEJIANG OCEAN UNIV
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