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 governance effect and ineffective control of the source of pollutants

Active Publication Date: 2014-12-17
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

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Embodiment 1

[0049] A method for reducing and controlling waste pollutants in scattered aquaculture areas in hilly areas (take 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 households with a total of 41 people; among them, 5 households raise pigs, and each household has 30-50 pigs. There is a small ditch with a length of 980m and a width of 1.5-2.5m in the catchment area. The normal flow rate in non-rainy days is 1.2-2.2m 3 / Hour. ), it includes the following steps:

[0050] A. Establish a biomass purification tank outside the pig pens of each farm: build a 3m (length) × 2m (width) × 1.5m (depth) biomass purification tank, and put 300kg of straw (the straw will gradually rot, every 5 It is necessary to add about 200kg of rice straw per month), and the waste of the pig farm is first treated by the biomass purification tank (ammonia nitrogen, total nitrogen, total phosphorus and COD conte...

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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 to a method for centralized reduction and control of waste pollutants scattered by small farmers in small catchment areas in hilly areas (a method for reduction and control of waste pollutants in scattered farming areas in hilly areas), especially suitable Reduce and control the source of waste pollutants from farming in small catchment areas of subtropical hills, to achieve the standard discharge of aquaculture industry and the improvement of water quality in small ditches and rivers at the source. Background technique [0002] With the rapid development of small-scale farming in rural areas, environmental problems caused by the discharge of farming pollutants have become increasingly prominent. According to the results of the 2010 National Census of Pollution Sources, the major water pollutants discharged from agricultural sources in my country each year are: che...

Claims

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Application Information

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Patent Type & Authority Patents(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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