Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
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give the water a tumbling action in the aeration process.
"We chlorinate to purify the water," Price explained. “But then we have to take the chlorine out of the water before placing the water back into the stream. Too much chlorine is a hazard to aquatic life."
The students saw the chlorination tank and then went into a small einderblock shed behind the tanks where the water is dechlorinated. The plant does the job, said Price. Water samples taken downstream from the plant are cleaner than samples drawn upstream, he said.
Price showed the students the plant’s lab, where the waste-water and treated water are tested. He explained a gauge that measures how much waste-water goes through the
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