. Removal of nitrate by an algal system. Water; Nitrates; Water; Algae. INFLUENT TO ^INFLUENT (IIXING PUMP. INFLUENT TO /INFLUENT MIXING PUMP (a^ r\ IIttI. ^ t\\i4'. w //^ //^ ii\\ -CENTER ISLAND -EFFLUENT 8-0" STANDARD POND MODIFIED POND FIGURE 5- MINIPOND DESIGNS USED AT THE I. volume and, if the meters were Inaccurate, the glass tubes and stainless steel floats were cleaned in a potassium di- chromate-sulfuric acid cleaning solution and then recali- brated. Nutrients were added to individual ponds or to the storage pond. Technical grade sodium nitrate was added to the st
. Removal of nitrate by an algal system. Water; Nitrates; Water; Algae. INFLUENT TO ^INFLUENT (IIXING PUMP. INFLUENT TO /INFLUENT MIXING PUMP (a^ r\ IIttI. ^ t\\i4'. w //^ //^ ii\\ -CENTER ISLAND -EFFLUENT 8-0" STANDARD POND MODIFIED POND FIGURE 5- MINIPOND DESIGNS USED AT THE I. volume and, if the meters were Inaccurate, the glass tubes and stainless steel floats were cleaned in a potassium di- chromate-sulfuric acid cleaning solution and then recali- brated. Nutrients were added to individual ponds or to the storage pond. Technical grade sodium nitrate was added to the storage pond to increase low summer nitrate concentra- tions to near 20 mgN/1. Often fertilizer grade phosphoric acid was added to the storage pond, but when phosphorus was being studied, it was added directly to the miniponds. The phosphorous concentration for most of the runs was 2 mg/l, as P. Iron (FeCl3) was added daily to the growth units when tested as a growth factor. Except during special mixing studies, the miniponds were mixed twice daily, from 0800 to O830 hours (for sampling) and from 1200 to 1530 hours. During most of the study, the miniponds were also swept once daily to eliminate concen- trated algal deposits caused by eddy currents„ Carbon di- oxide (5 or 100 percent) and atmospheric air were injected -25-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Water Resources; Brown, Randall L. Sacramento]; For sale by the Supt. of Docs. , U. S. Govt. Print. Off. , Washington
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Keywords: ., bookcentury1900, booksubje, booksubjectalgae, booksubjectnitrates
