Study on bioremediation of eutrophic lake
Mingjun Shan1, Yanqiu Wang, Xue Shen
1School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, China. dmj@ustl.edu.cn
Journal of Environmental Sciences (China)
|August 2, 2014
Summary
Bioremediation using a microbial preparation effectively reduces pollution in eutrophic lakes. This eco-friendly method lowers nutrient levels, decreases turbidity, and inhibits algae growth, improving overall water quality at a low cost.
Area of Science:
- Environmental Science
- Microbiology
- Water Quality Management
Background:
- Eutrophication of natural water bodies is a significant environmental problem.
- Conventional methods for water pollution control can be costly and cause secondary pollution.
- Bioremediation offers a promising, cost-effective, and sustainable alternative.
Purpose of the Study:
- To evaluate the efficacy of a multiple microbial preparation for bioremediation of eutrophic lake water.
- To assess the impact of bioremediation on key water quality parameters.
- To determine the cost-effectiveness of this bioremediation approach.
Main Methods:
- Selection, separation, and enrichment of specific bacteria from eutrophic lake environments.
- Formulation of a multiple microbial preparation including algae-destroying humic acid.
- A four-month field trial in a 60 m³ eutrophic water body (Yingze Lake, Anshan).
- Regular monitoring of total nitrogen (TN), total phosphorus (TP), ammonia nitrogen, chemical oxygen demand (CODCr), and turbidity.
Main Results:
- The microbial preparation significantly improved the self-purification capacity of the water.
- A notable decrease in turbidity and inhibition of algae growth were observed.
- Significant reductions in TN, TP, ammonia nitrogen, and CODCr were recorded compared to untreated water.
- The bioremediation process demonstrated substantial cost-effectiveness.
Conclusions:
- Bioremediation with the developed microbial preparation is a highly effective strategy for combating lake eutrophication.
- This method offers a radical solution to improve water quality, reduce pollution, and enhance ecological balance in natural water bodies.
- The approach is efficient, low-cost, and avoids secondary pollution, making it a sustainable environmental solution.
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