Preparation and application of dephosphorizing adsorbents for constructed wetlands

A technology of artificial wetland and phosphorus adsorbent, which is applied in water/sludge/sewage treatment, biological water/sewage treatment, sustainable biological treatment, etc. It can solve the problems that it is difficult to use as agricultural fertilizer, and achieve good acid solubility, Good plasticity and strong adaptability

Inactive Publication Date: 2013-01-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The per capita water consumption in rural areas has increased sharply, resulting in a large amount of domestic sewage. At the same time, due to sanitary requirements and equipment characteristics, it is difficult to use it as agricultural fertilizer.

Method used

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  • Preparation and application of dephosphorizing adsorbents for constructed wetlands

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The ratio of kaolin, activated carbon, sawdust and cement used in the phosphorus removal adsorbent in this example is 1: 1: 1: 1.

[0022] The specific preparation method of the phosphorus removal adsorbent used in this example: the commercially available kaolin, activated carbon and cement were directly used without any treatment, and the sawdust was directly used as furniture factory waste. Add water and mix according to the ratio of 1:1:1:1, shape it into 25mm granules with a spherical shaper, and dry it for later use.

[0023] The method of filling the constructed wetland with the phosphorus removal adsorbent used in this example: fill the bottom layer of the constructed wetland with dried 25 mm particles of the phosphorus removal adsorbent, with a layer height of 3.0 m. Add aquatic plants.

[0024] Determination of the effect of the phosphorus removal sorbent used in this example: the artificial wetland filled with the phosphorus removal sorbent is used for rural ...

Embodiment 2

[0026] The ratio of kaolin, activated carbon, sawdust and cement used in the phosphorus removal adsorbent used in this example is 2: 2: 1: 1.

[0027] The specific preparation method of the phosphorus removal adsorbent used in this example: the commercially available kaolin, activated carbon and cement were directly used without any treatment, and the sawdust was directly used as furniture factory waste. Add water and mix according to the ratio of 2: 2: 1: 1, shape it into 50mm granules with a spherical shaper, and dry it for later use.

[0028] In this example, the filling method of the phosphorus removal adsorbent in the construction of domestic sewage artificial wetland in the new rural areas of the south: fill the dried 50mm phosphorus removal adsorbent particles in the bottom layer of the artificial wetland, with a layer height of 3.5m. Add aquatic plants.

[0029] In this embodiment, the phosphorus removal adsorbent effect measurement: the artificial wetland filled with...

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Abstract

The invention relates to dephosphorizing adsorbents for new rural construction domestic wastewater constructed wetlands in the south and a preparation method of the dephosphorizing adsorbents. The preparation method of the dephosphorizing adsorbents comprises the following steps of: stirring kaolin, active carbon, sawdust, cement and water, preparing small-grain spheres by a spheres forming device, wherein the grain sizes are 10-50mm; filling a layer of dephosphorizing adsorbent into a new rural construction domestic wastewater constructed wetlands pond in the south; and planting aquatic plant on the dephosphorizing adsorbent. Due to the inspection of the new rural construction domestic wastewater constructed wetlands engineering in the south, the adsorbent disclosed by the invention is high-efficiency in dephosphorizing effect, high in absorption capacity which is larger than 5Pmg/g, and high in dephosphorizing efficiency which is larger than 98%, and the phosphorus concentration in discharged water is less than 0.02mg/L. Compared with the common sand filling method, the adsorbent disclosed by the invention has obvious advantages.

Description

technical field [0001] The invention relates to the treatment of domestic sewage in the construction of new rural areas in South China in artificial wetland purification in environmental ecological engineering, and specifically relates to a kind of phosphorus removal adsorbent and its preparation method and application in artificial wetlands Background technique [0002] Since 1952, Chairman Mao proposed that "the south has a lot of water, but the north has little water. If possible, it is also possible to borrow some water." The South-to-North Water Transfer has become a major strategic project to alleviate the serious shortage of water resources in northern China. As the south of the water source, the control of water pollution is particularly important. In the construction of new countryside, the discharge of rural sewage treatment standards will play a very important role in the entire work of energy conservation and emission reduction in our country. [0003] Rural do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32B01J20/20B01J20/30
CPCY02W10/10
Inventor 刘玉兰龙恩深黄如一黄巍
Owner SICHUAN UNIV
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