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Economic wetland system for ottelia acuminata macrobenthos for purifying agricultural runoff

A technology for benthic animals and farmland runoff, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high cost, and meet the requirements of high food value and water nutrient content Low, improve the effect of underwater light and dissolved oxygen

Active Publication Date: 2014-10-01
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the high cost of long-term stable operation of the wetland treatment system used to treat farmland runoff in the prior art, so as to provide a wetland with high economic value and capable of long-term stable operation processing system

Method used

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  • Economic wetland system for ottelia acuminata macrobenthos for purifying agricultural runoff
  • Economic wetland system for ottelia acuminata macrobenthos for purifying agricultural runoff

Examples

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Embodiment 1

[0033] The constructed wetland system used to deal with farmland runoff described in this embodiment is as follows: figure 1 As shown, it includes a water inlet tank 1 , a pesticide removal tank 2 connected to the water outlet of the water inlet tank 1 , and a wetland unit 3 connected to the water outlet of the pesticide removal tank 2 . Wherein, the length of the tank body of the pesticide removal tank 2 is 1.2m, and the depth is 0.9m. The tank body of the pesticide removal tank 2 is filled with straw, and the thickness of the straw is 0.8m. The stalks in this embodiment are pieces of corn stalks with a length less than 3 cm, and the density of the stalks filled in the tank is 210 kg / m3.

[0034] The bottom of the wetland unit 3 is sequentially provided with a clay waterproof layer 7, a substrate layer 4 and a flooded layer from bottom to top, wherein the thickness of the clay layer is 30 cm, the thickness of the substrate layer 4 is 20 cm, and the flooded The depth of the ...

Embodiment 2

[0039] The constructed wetland system used to deal with farmland runoff described in this embodiment is as follows: figure 1 As shown, it includes a water inlet tank 1 , a pesticide removal tank 2 connected to the water outlet of the water inlet tank 1 , and a wetland unit 3 connected to the water outlet of the pesticide removal tank 2 . Wherein, the length of the tank body of the pesticide removal tank 2 is 3m, and the depth is 1.5m. The tank body of the pesticide removal tank 2 is filled with straw, and the thickness of the straw is 1.2m. The straw in this embodiment is soybean straw fragments with a length less than 3 cm, and the density of the straw filled in the tank is 220 kg / m3.

[0040] The bottom of the wetland unit 3 is sequentially provided with a clay waterproof layer 7, a substrate layer 4 and a flooded layer from bottom to top, wherein the thickness of the clay layer is 6 cm, the thickness of the substrate layer 4 is 20 cm, and the flooded The depth of the laye...

Embodiment 3

[0045] The constructed wetland system used to deal with farmland runoff described in this embodiment is as follows: figure 1 As shown, it includes a water inlet tank 1 , a pesticide removal tank 2 connected to the water outlet of the water inlet tank 1 , and a wetland unit 3 connected to the water outlet of the pesticide removal tank 2 . Wherein, the length of the tank body of the pesticide removal tank 2 is 1.2m, and the depth is 0.9m. The tank body of the pesticide removal tank 2 is filled with straw, and the thickness of the straw is 0.8m. The straw in this embodiment is rice straw fragments with a length less than 3 cm, and the density of the straw filled in the tank is 220 kg / m3.

[0046] The bottom of the wetland unit 3 is sequentially provided with a clay waterproof layer 7, a substrate layer 4 and a flooded layer from bottom to top, wherein the thickness of the clay layer is 20 cm, and the thickness of the substrate layer 4 is 5.5 cm. The depth of the water layer was...

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Abstract

The invention provides an economic wetland system for ottelia acuminata-macrobenthos for processing agricultural runoff. The economic wetland system comprises a pesticide removal tank and a wetland unit, wherein the pesticide removal tank is connected with a water outlet of an intake tank; straws are filled into a tank body of the pesticide removal tank; the wetland unit is connected with the water outlet of the pesticide removal tank; a clay waterproof layer, a substrate layer and a flooding layer are sequentially arranged on the bottom of the wetland unit from bottom to top; ottelia acuminata is planted on the substrate layer; spiral shells and the like are also fed to the wetland unit. The pesticides of the wetland unit are removed by the pesticide removal tank with the straws, and a carbon source is provided, so that microorganisms, the ottelia acuminata and the spiral shells in the wetland unit can form a good ecological cycle system. Thus, the wetland system can stably run for a long period of time. The ottelia acuminata and the spiral shells in the wetland unit have relatively high economic value, and the economic performance of the wetland can be further improved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a sea cauliflower-macrobenthos economic wetland system which can operate stably for a long time by using a pesticide removal pond equipped with straws to remove pesticides and provide carbon sources for wetland units. Background technique [0002] Farmland non-point source pollution has become the main pollution source of most rivers and lakes, and farmland runoff is one of the main sources of farmland non-point source pollution. Farmland runoff is a typical low-pollution water, which contains various pollutants such as nitrogen, phosphorus, and residual pesticides. hotspot. At present, the technologies used to treat farmland runoff mainly include wetland treatment technology, vegetation buffer zone treatment technology, biofilm treatment technology, etc. Among them, wetland technology has been the most widely used due to its characteristics of low investment and low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 储昭升叶碧碧王海燕庞燕胡小贞靳明
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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