JPS59179123A - Treating apparatus of captured substance such as jellyfish at intake of sea water - Google Patents

Abstract

PURPOSE:To treat efficiently captured substances at an intake of sea water by cleaning an obtd. filtrated after said substances are pressed and dehydrated. CONSTITUTION:Jellyfishes 10 captured at an intake of sea water are put in a dehydrating basket 12 to drain off sea water and slurried by a pulverizer 14. The jellyfish slurry is sent to a press dehydrator 16 and separated into solid substances and a filtrate. Since a large amount of org. components are contained in the flitrate from the dehydrator 16, the filtrate is sent to an oxidation tank 18, a flocculation tank 20, a dechlorination tank 22, an activated-carbon treating tank 24 and cleaned. Until the discharging standard is satisfied, the filtrate is treated and then discharged. As a result, captured substances at an intake of sea water such as jellyfishes are treated efficiently, and further it does not generate secondary pollution.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for processing jellyfish caught at a seawater intake.

At facilities that use large amounts of seawater, such as steel mills and power plants, floating marine organisms such as jellyfish and seaweed are trapped on the screens at the seawater intake, and these must be disposed of. Jellyfish in particular proliferate abnormally in the summer, and tens of tons of jellyfish are captured each day by screens at water intakes. Traditionally, jellyfish were left as waste in holes dug in the ground, but in the summer, when there are many leaves, a smell similar to rotting fish is emitted, and the place where the jellyfish is dumped smells. There was the inconvenience of sewage flowing out.

The present invention is aimed at improving such inconveniences, and it is an object of the present invention to provide a processing device that can efficiently process captured objects such as jellyfish.

That is, the seawater intake capture material processing apparatus of the present invention is an apparatus for processing seawater intake capture material mainly containing floating organisms such as jellyfish, and is a device for processing the seawater intake capture material, which is mainly composed of floating organisms such as jellyfish, and is a device for processing the seawater intake capture material, which separates the captured material into solid content and moisture. The present invention is characterized in that it includes a compression dehydration means, and a treatment means for purifying the liquid obtained from the compression dehydration.

Hereinafter, embodiments of the present invention will be described in more detail with reference to FIG. Jellyfish caught at seawater intake 1
0 (hereinafter referred to as jellyfish, although other floating substances such as seaweed are included) are first placed in a dehydrator 12 to drain the seawater, then made into a slurry by a crusher 14, and then compressed and dehydrated. Sent to machine 16. After capturing the jellyfish, it is possible to directly compress and dehydrate them, but in order to increase the dehydration efficiency, it is necessary to crush the jellyfish prior to this process, such as by crushing them into a slurry or cutting them into small pieces. It is preferable to provide Furthermore, in order to transfer the jellyfish to a press-dehydrator, it is easier to transfer the jellyfish if it is in the form of a slurry.

Since jellyfish are soft, no special crushing means is required; for example, a pump blade with a cutter function or an in-line mixer will suffice.

As the compression dehydrator 16, any compression type device such as a filter press can be used, and a belt press type can also be used.

The jellyfish slurry is solid-liquid separated into solid matter and p-liquid in the press/squeezer 16. Isomorphic materials may be incinerated and, in some cases, may be used as landfill materials, animal feed, etc.

The furnace liquid from the dehydrator 16 contains a large amount of organic components, and is discharged after being treated by a purification treatment means at a value that satisfies discharge standards. Sheet 70 in FIG. 1 shows a case where the organic matter decomposition treatment of the dehydrated F liquid is carried out by chemical oxidation treatment using sodium hypochlorite. First, the P solution is sent to the oxidation treatment tank 18, where the pH is maintained near neutrality and oxidation treatment is performed using sodium hypochlorite. The oxidized liquid is sent to the coagulation treatment tank 20, where SS is removed. In the coagulation treatment tank 20, polyaluminum chloride (
PAC) or a polymer flocculant or flocculation aid is added,
A known coagulation separation device can be used for coagulation separation.

After dehydration, the aggregated solids are incinerated or otherwise subjected to appropriate treatment.

The clarified liquid from the flocculation process %20 is sent to the dechlorination process 22 and treated to remove residual chlorine.

This treatment can be easily carried out using a nickel catalyst, but
Other known processing methods can also be employed.

The liquid from which residual chlorine has been removed is then sent to the activated carbon treatment tank 24, where it is further subjected to finishing treatment. Activated carbon treatment is
This is done by adding and mixing powdered activated carbon to the liquid, allowing the activated carbon to adsorb and remove the COD components in the liquid, and then separating the activated carbon, and the treated liquid is discharged. Activated carbon adsorption treatment can also be performed by a method such as passing liquid through a column filled with powdered activated carbon.

Note that when adsorption treatment using activated carbon is performed as a finishing treatment in this manner, residual chlorine can also be removed by this treatment, so the dechlorination tank 22 can be omitted. However, in order to reduce the load on activated carbon, it is preferable to follow the above flow.

As the oxidation treatment means in the present invention, biological means using activated sludge can also be used. In this case, if there is an activated sludge treatment facility nearby, it is also possible to use it.

According to the jellyfish processing device of the present invention, a large amount of jellyfish caught in the seawater intake can be efficiently processed without causing secondary pollution.

Example: The jellyfish caught on the screen of the seawater intake port was drained in a dehydration basket, crushed in a crusher, and then crushed in polypropylene P cloth (PP25F, air permeability: 900-1080 cc).
, (crl)-1・m1n-'), 7,0
Dehydrated at a pressure of Kg/crA. The dehydrated cake was rubbery and had a water content of 78.2 to 87.3 degrees, and could be incinerated satisfactorily by using a small amount of heavy oil.

A cloudy P solution with a fish odor was obtained from the dehydrator. This F solution has a pH of 7. ．． 7, 88; 75■/l
.

COD; 253m9/l, TOC; 2161
It was 1Q/l.

Add sodium hypochlorite to this filtrate, effective chlorine amount 12%.
) is added per p solution 1 500 +l1lli',
The pH of the solution was adjusted to 7.0 using sulfuric acid and held for 30 minutes.

Next, after removing the residual chlorine in the lower right corner of this sodium hypochlorite treatment solution, 500 dah powdered activated carbon that had been applied with solution 1 was added and mixed, and the COD was measured after 30 minutes. It was up to 4omg/l. This value satisfies the discharge standards.

[Brief explanation of the drawing]

FIG. 1 is a flow diagram showing an embodiment of the present invention.

Claims (1)

[Scope of Claims] 1. An apparatus for processing seawater intake trapped matter mainly consisting of floating organisms such as jellyfish, which comprises compressing dewatering means for separating the trapped matter into isomorphic components and moisture; 1. A processing device for seawater intake trapped matter, comprising processing means for purifying liquid F obtained from the compression dewatering means. 2. The processing apparatus according to claim 1, further comprising crushing means for crushing and supplying the captured material to the compression processing means. 3. The treatment apparatus according to claim 1 or 2, wherein the treatment means for the purifying basin is a chemical oxidation treatment means using hypochlorite. 4. The processing apparatus according to claim 1 or 2, wherein the processing means for purification is a biological oxidation processing means.