Method for monitoring fouling in commercial waters
A fouling monitor and method for sensing fouling in commercial waters and for differentiating between microbiological fouling and chemical fouling, which comprises a dissolved oxygen probe disposed in a slip stream of water and means of supplying an abundance of oxygen and nutrient to the microbial activity whereby a decrease in dissolved oxygen level is sensed due to the increased respiration of the germs when microbiological fouling occurs. A polyester screen is mounted over the sensing end of the dissolved oxygen probe to encourage microbiological fouling by providing a method for engaging the germs and to increase distinction between the biological element and the non-viable/chemical component.
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Commercial oceans, like the ones used in newspaper systems, cooling systems, mining systems, and metallic systems, are prone to pollution and fouling. In order to control such fouling, such waters have been treated normally bytrial-and-error methodology. Either too much or too little chemical is employed, which is disappointing. Such fouling may function as biological type or of the non-viable/chemical type. Depending on biological fouling, when it reaches a certain degree,it will become necessary to shut down the system for maintenance.
For example, in a newspaper system, when microbiological fouling at a snowy water reaches a certain biological level, it contributes to making rejectable newspaper that’s expensive to paper creation. More especially, the sessile portion of microbialactivity causes deposits that are hard to monitor. When sloughing of those residue happens in a newspaper machine, runability of this machine is affected by increased sheet defects and paper fractures. At that time the system must be shut down formaintenance, resulting in down-time which interrupts production. It must be cleaned or”boiled out” until the system can be put back in operation to make paper. With regard to controlling biological fouling, biocides are added to thewater to kill the germs or germs.
Current methods for measuring fouling lack sensitivity, require excessive maintenance, and are not automated. The only method now for differentiating between bacteriological fouling and chemical duplication is via utilization of destructive testingwhich steps”sliminess” subjectively, plate counts to a specified portion of the populace, or microbial activity.
Dissolved oxygen (DO) probes are proposed for detecting microbial activity because it is known that high levels of bacteria in fluids decrease dissolved oxygen levels. But they are limited as a result of compound jelqing that graduallyreduces the efficiency to measure true DO levels.
Further, DO probes have been used to quantify microbial activity in solutions. In which the dissolved oxygen drops, it is supposed that microbial growth is occurring and the system is polluted. However, dissolved oxygen can drop due to changesin air supply, probe-surface fouling, temperature variation, or numerous factors, hence making the use of the DO probes unreliable. Thus, dependable measurement of microbiological fouling in waters that are processed hasn’t been possible.
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