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Purification of pulp and paper mill effluent using Eichornia crassipes
S Yedla1, A Mitra, M Bandyopadhyay
1Indira Gandhi Institute of Development Research, Mumbai, India.
Environmental Technology
|June 29, 2002
Summary
This study developed an effective and economical wastewater treatment system for Konark Pulp and Paper Industries using water hyacinth (Eichhornia crassipes), coagulation, and filtration. The treated water met discharge standards and was safe for aquatic life, improving overall water quality.
Area of Science:
- Environmental Science
- Water Treatment Technologies
- Ecology
Background:
- Konark Pulp and Paper Industries generates 1600 m3 of wastewater daily.
- The existing wastewater treatment system is inefficient and uneconomical.
Purpose of the Study:
- To develop and evaluate a new, cost-effective wastewater treatment system.
- To assess the performance of water hyacinth, coagulation, and filtration in treating industrial wastewater.
Main Methods:
- Utilized water hyacinth (Eichhornia crassipes) for initial treatment.
- Employed coagulation using lime, alum, and lime:alum combinations.
- Incorporated rapid sand filtration as a final treatment stage.
- Monitored key water quality parameters: BOD, COD, DO, TDS, turbidity, transmission, and color.
Main Results:
- The integrated treatment system effectively reduced pollutants to meet discharge standards.
- The new system demonstrated economic feasibility compared to the previous one.
- Fish (tilapia) survival and health in treated water confirmed its safety for natural discharge.
- Fish culture further enhanced the treated water quality.
Conclusions:
- The developed treatment system offers an efficient and economical solution for industrial wastewater.
- Water hyacinth-based treatment combined with coagulation and filtration is a viable eco-friendly approach.
- Treated wastewater is safe for environmental discharge and can support aquatic ecosystems.