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Picture 1: Baza Gardens STP blowers for aeration system
Appendix STP-D Baza GArdens STP
VP0989 1 of 20 Guam Waterworks Authority Island of Guam
Picture 2: Grit chamber in head works and control building.
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Picture 3: Bar screen and comminutor.
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Picture 4: Overview of aeration, clarifier, and digester.
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Return activated sludge discharge into aeration basin (upper left).
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Picture 6: Digester.
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Picture 7: Influent discharge to aeration basin.
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Picture 8: Clarifier looking towards digester. Grey pipes are for aeration of digester.
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Picture 9: Clarifier looking towards aeration tank.
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Picture 10: Close up of effluent discharge from clarifier. Note heavy corrosion of weir. Pinkish color in water possibly due to bacteria.
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Picture 11: Scum collection box in clarifier. Skimmer arm would hang in the vicinity of the scum box.
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Picture 12: Scum box return line discharging back into the aeration tank.
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Picture 13: Duckweed in aeration tank at wall between aeration tank and digester.
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Picture 14: Hole corroded through wall between aeration tank and clarifier. Water was splashing through the wall into the effluent trough of the clarifier.
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Picture 15: View over clarifier towards aeration tank. Note the lack of aeration in the aeration tank away from the interior wall.
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Picture 16: View over clarifier on opposite side as Picture 15. Digester is out of frame to the left. Note very limited aeration in this area.
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Picture 17: Holes corroded through baffle wall between clarifier and aeration tank.
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Picture 18: V-notch weir for measuring effluent discharge flow rate from the plant. Operator was demonstrating measuring depth of flow by placing staff directly into notch of weir.
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Picture 19: Close up of v-notch weir. Weir appears to be near 135 degrees. Chart used to determine flow rate based on depth of flow was for a 60 degree weir.
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Picture 20: Data logger connected to influent depth monitor.
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