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Ultrapure water production system having pretreatment system for performing both anaerobic and aerobic organism treatments
| Details |
Inventors: Yamasaki, Kazuyuki; Okamoto, Seiji; Yokotani, Atsushi; Sakata, Kazuyuki;
Assignee: Sharp Kabushiki Kaisha (JP)
Primary Examiner: Upton; Christopher
Assistant Examiner:
Attorney, Agent or Firm: Nixon & Vanderhye
There is provided an ultrapure water production system which allows recycled waste water to be microbially treated and thereby reclaimed without causing any clogging of treatment system due to abnormal propagation of microorganisms, and which allows ultrapure water with 1 ppb or lower TOC to be obtained. This ultrapure water production system includes a lower part having an anaerobic organism treatment part (12), and an upper part which is placed above the lower part via a separating wall W.sub.B having an opening (16) and which has a biological treatment equipment including an aerobic organism treatment part (1). Since lower anaerobic microorganisms and upper aerobic microorganisms consume nutrition sources for microorganisms, treated water which is difficult for microorganisms to propagate can be obtained. Further, not only TOC but also organic nitrogen compounds are treated by the microorganisms, by which treated water with low electrical conductivity can be obtained. |
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DETAILED DESCRIPTION The object of the present invention is to provide a compact ultrapure water production system which allows recycled waste water to be reclaimed through a biological treatment without causing the clogging of treatment systems due to abnormal propagation of microorganisms, and which is able to obtain ultrapure water with 1 ppb or lower TOC.
In order to achieve the aforementioned object, according to the present invention, there is provided an ultrapure water production system comprising a raw water pretreatment system, a primary pure water production system, and a secondary pure water production system, the pretreatment system comprising: a lower part having an anaerobic organism treatment part; and an upper part which is provided above the lower part via a separating plate having an opening and which has a biological treatment equipment including an aerobic organism treatment part.
According to this invention, in the pretreatment system of the ultrapure water production system, its lower part has an anaerobic organism treatment part while its upper part has an aerobic organism treatment part.
Therefore, firstly, in the aerobic organism treatment part, the sludge in which microorganisms have propagated with time automatically reach the anaerobic organism treatment part of the lower part by natural precipitation.
These microorganisms that have settled down to the lower part can be immobilized as anaerobic microorganisms.
In this anaerobic organism treatment part, less oxygen will be supplied as time elapses, such that anaerobic microorganisms will be generated and propagated with time lapse.
As a result, anaerobic microorganisms come to increasingly occupy major part.
In this way, an anaerobic treatment region with anaerobic microorganisms propagated is formed in the lower part, while an aerobic treatment region with aerobic microorganisms propagated is formed in the upper part.
Therefore, the water introduced to this pretreatment system has nutrition sources for microorganisms treated (consumed) by both aerobic and anaerobic microorganisms
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