Biological processes, in particular activated sludge are commonly used as secondary treatment methods in paper-industry sewage systems. What is less widely known, however is that the use of an aeration system (aeration efficiency) can greatly improve treatment performance. It would be no exaggeration to say that because most drainage treatment plans operate independently of production facilities, an unnecessarily high degree of carelessness is common in the industry. A little more attention in this area could substantially cut losses in a company's net profits. As the term biological process suggests, by activating microorganisms, it is possible to reduce the amount of BOD and COD in wastewater.
But when use incorrectly this basic technique can be counterproductive, making it difficult to reduce the load and at the same time, producing a large quantity of sewerage. What causes this to occur? The answer lies in the subtle relationship between oxygen and microorganisms, which when not properly dealt with can create needless problems. Microorganisms, with the exception of large amounts of artificially created chemical substances, thrive in direct relation to their immediate environment. And like human beings, some microorganisms metabolize energy with oxygen. In other cases, they metabolize with nitric-acid or sulfuric-acid ions. However, by using aerobic drainage treatment methods such as activated sludge that cause non-oxygen metabolization, not only does a decrease in treatment speed occur, but odor and bulking (filamentous bacterium) frequently result. To prevent these unwanted consequences, it is necessary to efficiently diffuse the oxygen in the BOD load in an existing diffusion tube becomes, the more difficult the process becomes.
To solve this problem, by raising the water and sludge from the bottom of tank, Aience's revolutionary water treatment system makes use of a technique that greatly circulation of the water and improves performance in a way that has been impossible until now.
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