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An Automatic System for Sampling Processing Waste Water¹

ABSTRACT

The composition of waste water from food processing and other plants varies with time. A composite sample composed of smaller samples taken at different times will represent an average condition of these flows. The sampling system described in this paper will gather subsamples over a 24-hour or longer period and keep the composite sample frozen until ready for laboratory analysis. This system will work equally well on pressurized pipelines or ponded water. The parts cost per controller is approximately $80.00 plus the price of a freezer, associated plumbing, and a pump if the water sample is not in a pressurized pipeline.

¹ Contribution from the Western Region, Agricultural Research Service, USDA; Idaho Agricultural Experiment Station cooperating. This research was supported in part by a grant from the Potato Processors of Idaho Association, Inc.

² Electronics Engineer and Soil Scientist, respectively, Snake River Conserv. Res. Cen., Kimberly, Idaho 83341.

Received for publication August 8, 1974. Accepted for publication December 23, 1974.

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