Method for reducing and controlling waste pollutants in scattered culture zones of hills

A technology for breeding areas and pollutants, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor treatment effect and ineffective control of pollutant sources

Active Publication Date: 2013-12-11
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after 1-2 years, it will return to its original state, and the overall treatment effect is not good. The main reason is that the source of pollutants has not been effectively controlled.

Method used

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  • Method for reducing and controlling waste pollutants in scattered culture zones of hills
  • Method for reducing and controlling waste pollutants in scattered culture zones of hills
  • Method for reducing and controlling waste pollutants in scattered culture zones of hills

Examples

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Embodiment 1

[0049] A method for reducing and controlling waste pollutants in scattered farming areas in hills (taking a small catchment area in Shiyan Village, Baisha Town, Changsha County, Hunan Province as an example. The small catchment area is 1.63km 2 , there are 11 farming households with a total of 41 people; among them, 5 households raise pigs, and each household has 30-50 pigs on hand. There is a small ditch with a length of 980m and a width of 1.5-2.5m in the catchment area, and the normal flow in non-rainy days is 1.2-2.2m 3 / hour between. ), which includes the following steps:

[0050] A. Build a biomass purification pool outside the pigsty of each farm: build a 3m (length) × 2m (width) × 1.5m (depth) biomass purification pool, put 300kg of straw (the straw gradually rots, every 5 It needs to add about 200kg of straw per month), and the waste from pig farms is first treated in a biomass purification tank (the contents of ammonia nitrogen, total nitrogen, total phosphorus and...

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Abstract

The invention discloses a method for reducing and controlling waste pollutants in scattered culture zones of hills. The method includes the following steps: A. constructing a biomass purifying tank; B. constructing an ecological trench wetland system, namely constructing an ecological trench cross section, constructing a water retaining ridge, and configuring ecological trench plants, wherein the ecological trench plant configuration is divided into three sections, namely a front section at the upstream of an ecological trench, a middle section at the middle-upper part of the ecological trench, and a rear section at the middle-lower part of the ecological trench; C. constructing a diversion dam; and D. constructing a tail-end three-level wetland system, including a primary green myriophyllum verticillatum ecological wetland, a secondary economic wetland, and a third ecological fishpond. The method is low in building and running cost and convenient to operate, has a good governance effect, and can effectively reduce and control pollutants such as COD (chemical oxygen demand), nitrogen, phosphor and the like in polluted water. According to the method, culture wastes in a water collecting zone are treated by an ecological trench constructed in a natural drainage ditch and the ecological wetland system constructed at the tail end. The method can be applied to hills in the vast subtropical zone in south of the middle and lower reaches of the Yangtze river region in China, and has certain economic benefits.

Description

technical field [0001] The present invention relates to the field of agricultural environment, and more specifically relates to a method for centralized reduction and control of waste pollutants from small farmers scattered in small catchment areas in hilly areas (a method for reducing and control of waste pollutants in scattered farming areas in hilly areas), especially suitable for Reduce and control the source of aquaculture waste pollutants in small catchment areas in subtropical hills, realize the standard discharge of aquaculture and improve the water quality of small ditches and small rivers at the source. Background technique [0002] With the rapid development of small-scale farming in rural areas, the environmental problems caused by the discharge of farming pollutants have become increasingly prominent. According to the results of the 2010 National Survey of Pollution Sources, the annual discharge of major water pollutants from agricultural sources in my country i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 肖润林吴金水刘锋李红芳何阳张树楠李裕元
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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