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Abstract

The reliance on wastewater for agricultural use is
increasing significantly and it is imperative to understand how this valuable water resource should be managed for agricultural use.  A key element for utilizing wastewater is filtration.  This study evaluated the utility of automatic self-cleaning filtration of wastewater in agricultural settings using three case studies. The objectives of the presentation are to:  explain and discuss the properties of wastewater; explain the properties, characteristics, types and options of filtration; explicate the filtration requirements for all irrigation regimens; conduct a cost-benefit comparison of typical filtration options; and compare the disposal characteristics of flush water.

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Methodology

This study compared the performance of three methods of

filtration for agricultural use of wastewater in California.  This is a quantitative comparison of sand media filtration, automatic self-cleaning disk filtration and automatic self-cleaning screen filtration.  Measurements were taken for: rate of flushing; quantity of flushing effluent; time for flushing sequence; and aggregated flush water for the season.  The source for all three system is the same; wastewater provided by Ventura County.  Each system had identical inputs: flow (1000 gpm or 227 m3/hour); filtration degree (100 micron), water source (tertiary treated effluent), and pressure (60 PSI or 4.15 bar). The evaluation covered one irrigation season of 100 days.

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Filtration Types

Self-Cleaning Screen Filter

Sand Media Filters

Self-Cleaning Disk Filters

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Video of Self-cleaning Screen Type

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Results

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