CSBE-SCGAB

Sequential remediation processes for a low level pesticide wastewater

Authors: Al Hattab, M, A Ghaly
Description: The aim of this study was to develop a remediation system for the treatment of a low-level pesticide wastewater that uses available onfarm organic matter as an absorption media, is capable of reducing the concentration of the pesticide to a safe level and is economically viable for implementation by farmers. The absorption capacity of chopped hay and soybean to the fungicide captan was evaluated under batch conditions and the effectiveness of the composting process in depredating captan in contaminated organic materials was evaluated. The results showed that both hay and soybean plant residues were very effective in absorbing 99.2 and 98.5 % of captan form the wastewater after 4 hours, respectively. Because of its availability, hay can be used in an onfarm pesticide immobilization system that consists of shallow reinforced concrete pit (filled with hay) with steel bars across the top for machinery to roll onto and be washed. The wastewater can be retained for 24 hours which is a sufficient time for hay to absorb the captan. The contaminated hay can then be composted. The addition of used cooking oil raised the temperature of the composting mixture to 63
Keywords: pesticide, captan, soybeans, hay, absorption, immobilization, degradation, composting
Technical field: technical_fields_app9
Session name: Waste management
Date: 2012
Identifier: CSBE12086
Coverage: Canada

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