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Molinate decontamination processes in effluent water from rice fields.

J M Carrasco1, C Sabater, J L Alonso

  • 1Universidad Politécnica de Valencia, Spain.

The Science of the Total Environment
|August 12, 1992
PubMed
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Aeration effectively reduced molinate contamination by 84% in rice field water. Microbial degradation in cultures achieved 97% molinate removal, offering a promising solution for effluent treatment.

Area of Science:

  • Environmental Science
  • Water Treatment Technologies
  • Agricultural Chemistry

Background:

  • Molinate is a herbicide commonly used in rice cultivation.
  • Effluent water from rice fields can contain significant levels of molinate, posing environmental risks.
  • Effective treatment methods are needed to reduce molinate contamination in agricultural wastewater.

Purpose of the Study:

  • To evaluate the efficacy of aeration, photodecomposition, and biological degradation for reducing molinate in rice field effluent.
  • To compare the performance of different treatment processes under various conditions.

Main Methods:

  • Aeration experiments were conducted with and without aeration to assess molinate dissipation.
  • Photodecomposition was studied using UV-light on clean water solutions.

Related Experiment Videos

  • Biological degradation was investigated in algal and micro-organism cultures under controlled conditions.

    • Main Results:

    • Aeration resulted in an 84% molinate dissipation, compared to 22% without aeration.
    • UV-light photodecomposition achieved 96% molinate degradation in 24 hours.
    • Micro-organism cultures demonstrated a 97% degradation of molinate, while algal cultures reached 78% degradation over 40 days.

    Conclusions:

    • Aeration and microbial degradation are highly effective methods for reducing molinate contamination in rice field effluent.
    • Photodecomposition using UV-light is also efficient but may be less practical for large-scale effluent treatment.
    • Biological treatment using micro-organisms presents a robust solution for sustainable management of herbicide-contaminated water.