Project Description

Dianchi Lake of Kunming City, Yunnan Province

  • Objective
    The water purification experiment of Green Biotech Floating-island technology
  • Country, region
    China Kunming City, Yunnan Province
  • Object water area
    Dianchi Lake
  • Background
    Dianchi Lake is the largest lake in Chinese Yunnan Province, and the sixth largest one in China. It is located in the southwestern part of Kunming City and is surrounded by many places of interest.
    However, as the development of industries in the surrounding cities, the water in Dianchi Lake was seriously polluted. Because of the numerous blue algae caused by over-eutrophication, the water had lost its capability of water resources.
  • Consignor
    China's National Environmental Protection Agency
  • Construction
    29th July, 2004
  • Completion
    4th August, 2004
  • Technology
    Green Biotech Floating-island
  • content:
    water area
    2800㎡
     
  • content:
    floating-island area
    the construction area of Green Biotech Floating-island is 56㎡,
    compared with other company's 200㎡
  • Content:
    floating-island plants
    (vegetables):
    Aloe, sweet pepper, loosestrife, begonia fimbristipulata hance, cedrela sinensis, swamp cabbage, mint, pea, garlic
    (ornamental plants):
    phyllostachys nuda, chrysanthemum, China rose, hibiscus, jasmine flower, camellia sasanqua, Coleus blumei, Gazania sunshine, African violet, open herding, Snapdragon, narcissus, scarlet sage, carnation, tricolor viola, rhododendron hybrida, rieger begonia
  • End time of
    the experiment
    1th January, 2005
     
  • Construction condition,
    results
    The 56㎡ Green Biotech Floating-island occupying only 2% of the water area purifies the water, as comparison, in other company's 200㎡ one, plants could hardly survive.
    Costs: reduced to 1 tenth
    Purification efficiency: increased by several dozen times
    Plants * microbes, the water restoration effect is good
    Binary effects purification + beautification, firstly develops the newt used tires reclamation technology
    The reclamation of many other wastes
  • Achievement
    In order to introduce and popularize Green Biotech Floating-island technology, a national conference was held by China's National Environmental Protection Agency and State Council's Office of the South-to-North Water Transfer Project. (8~10th March, 2009, Kunming, Yunnan Province)
    national conference
 
before the experiment
before the experiment
Green Biotech Floating-island
Green Biotech Floating-island
Data of the original water (examining date: 29th July, 2004)
chroma
(degree)		 transparency
(cm)		 phosphorus
(mg/L)		 nitrogen
(mg/L)		 COD
(mg/L)		 BOD
(mg/L)		 PH
(value)		 DO
(mg/L)		 SS
(mg/L)
90 13 1.815 12.65 223.8 28.7 8.76 6.85 105
Changes of phosphorus density (mg/L)
2004/7/29 2004/9/3 2004/10/11 2004/11/11 2004/12/10 2005/1/10
1.815 0.710 0.269 0.158 0.174 0.177

Changes of phosphorus density


The standard of China's national surface water is level II

The standard of lakes is level IV

Removing rate is 90.2%


Changes of nitrogen density(mg/L)
2004/7/29 2004/9/3 2004/10/11 2004/11/11 2004/12/10 2005/1/10
12.65 5.84 3.59 2.81 2.77 1.45

Changes of nitrogen density


The standard of China's national surface water is level III

Removing rate is 88.53%


Changes of COD--Chemical Oxygen Demand density (mg/L)
2004/7/29 2004/9/3 2004/10/11 2004/11/11 2004/12/10 2005/1/10
223.8 103.8 80.0 84.7 57.2 60.7

Changes of COD--Chemical Oxygen Demand density


The standard of China's national surface water is level III

Removing rate is 72.88%


BODChanges of BOD--Bio-chemical Oxygen Demand density (mg/L)
2004/7/29 2004/9/3 2004/10/11 2004/11/11 2004/12/10 2005/1/10
28.7 5.6 10.0 4.0 2.9 1.2

BODChanges of BOD--Bio-chemical Oxygen Demand density


The standard of China's national surface water is level I

Removing rate is 95.82%



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