When plant effluent is discharged into a lake or river, its dissolved oxygen level must be maintained to sustain the aquatic life near the discharge point. Also, measuring dissolved oxygen at this point ensures local permit compliance for the plant discharge. It assists in ensuring that there is sufficient dissolved oxygen in the process for the biological activity to take place, and helps to optimize energy usage through controlled air addition. Maintaining a proper level of dissolved oxygen can only be accomplished by using an on-line instrument that will accurately and continuously measure the dissolved oxygen concentration at the various stages throughout the treatment process. This is one of several documents pertaining to dissolved oxygen measurement in wastewater treatment.
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I would be grateful for information on Hildenbrandia- a macroalgae. The plant is a chemical plant in Ireland that has pH balancing tanks, balancing tanks and aeration tanks each of differing pH. Basically the pH ranges from extremely alkaine to extremely acidic in nature depending on the tank. There has been good weather here in recent weeks- 20 degrees C and sunny. Around the start of this good weather spell large quantities of algae has been found growing in all of the tanks. Currently personnel are literally using picket forks to lift out the algae growth in the tanks.