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AssigneeMitsubishi Chemical Corporation
InventorsHisanori GOTO, Takayuki KOBAYASHI
Estimating the term…
The purpose of the present invention is to provide a treatment method by which, even for wastewater with organic constituents constituting a large portion of organic wastewater as a whole and suspended solids (SS) and with a large negative charge ratio, organic nitrogen constituents and phosphorus compounds can be efficiently separated and collected and good-quality separated water can be obtained by reducing the quantity of SS, BOD, COD, and nitrogen constituents in the separated water. Provided is a treatment method for organic waste water, in which a flock is formed by adding a polymer flocculant to organic waste water with organic nitrogen constituent content in relation to suspended solids (SS) being 4-50%/SS and organic nitrogen constituent content being 250-50,000 mg/L, and thereafter, the flock is separated from the organic wastewater by solid-liquid separation.
A treatment method for organic wastewater,
Dependencies are inferred from the claim text.
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From material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms: from waste material
Using organic material: tensides
Accessory food factors for animal feeding-stuffs: organic substances
Separation of suspended solid particles from liquids by sedimentation: using flocculating agents
Term end not estimated
One aspect of the present invention relates to a treatment method for organic wastewater and use of the same, and for example, relates to a treatment method for efficiently clarifying organic wastewater. More specifically, one aspect of the invention relates to a treatment method for organic wastewater in which not only an organic substance in organic wastewater but also an organic body nitrogen component is contained in a coagulation flock as a solid content, efficient separation and recovery are performed, and BOD, COD, and a nitrogen component in the separated water are greatly reduced, and thus, separated water of high water quality can be obtained.
Examples of a treatment method for organic wastewater include an activated sludge method. The activated sludge method is a method of obtaining high-quality separated water by aerating an activated sludge, by decomposing a contamination substance in the microbe sludge in an aerobic condition, and by suitably managing a contamination substance concentration and an aeration amount. The activated sludge method is widely used in a clarified treatment of sewage, organic wastewater that is discharged from a factory, and the like.
In the activated sludge method, a removing effect of BOD contained in the organic wastewater is high, but a removing effect of a nitrogen compound and a phosphorus compound is low. In addition, it takes time to performing the treatment, a facility cost is also expensive, and a large installation area and a large installation space are required.
FIG. 1 is a diagram illustrating the outline of a treatment step of the invention; and
FIG. 2 is a diagram illustrating a mutual relationship between a minus charge ratio α of organic wastewater and a mole percentage p of a cationic constituent unit with respect to a sum of all constituent units of each polymer material configuring a polymer coagulant (X) in Examples 1 to 29.
Hereinafter, one aspect of the invention will be described in detail.
<Description of Terms>
First, some terms in this specification will be described.