KR100833993B1 - processing system for waste water sludgy and its method thereof - Google Patents

Abstract

The present invention relates to a stream / lake bottom sludge treatment system and method for drawing and separating sludge deposited on a river or lake bottom, composting or recycling it as aggregate, the main configuration is a river or lake bottom A drawing step for drawing out the sludge precipitated in the; A separation step of separating the drawn sludge into gravel and sand layers; A debris removal step of removing debris contained in the sludge passing through the gravel and sand layers with a screen; A sludge filtrate treatment step of composting the sludge filtrate from which the contaminants have been removed by planting plants or a physicochemical method; A compression step of washing the separated impurities and compressing them; A stabilization step of stabilizing the compacted contaminants; It consists of a recycling step of cleaning the sand and gravel to recycle to civil engineering aggregate.

River sludge, drawing, filtrate, reed

Description

Processing system for waste water sludgy and its method

1 is an opening view of the present invention stream / lake treatment system,

2 is a cross-sectional view showing a filtrate treatment plant of the present invention stream / lake treatment system,

3 is a schematic view showing a physical filtrate treatment plant of the present invention stream / lake treatment system,

Figure 4 is an enlarged view of the main part of the present invention.

* Explanation of symbols for the main parts of the drawings

1: sludge filtrate treatment plant 10: existing soil layer

11: order sheet 12: filter layer

13: nonwoven fabric 20: sump

100: physical-chemical filtrate treatment plant

110: storage tank 120: chemical reaction tank

140: sedimentation tank 150: chemical storage tank

170: dehydrator

The present invention relates to a system and a method for treating sludge deposited on a river or lake bottom, and more particularly, to separate and separate the sludge precipitated on the river bottom, aggregates and composting river / lake bottom sludge To a processing system.

As industrial development, various wastes generated during industrial activities pollute not only the ground but also rivers, lakes, and groundwater. Moreover, these problems are not only contaminated, but also have a problem that adversely affects people who consume them by contaminating vegetables, fish and fish, as well as grains that grow and eat the soil or water.

Therefore, in recent years, various methods and apparatuses for effectively treating such wastes and sludges have been developed. Representatively, landfills are recognized as one large bioreactor, and the biodegradability of the landfill wastes is artificially controlled by artificially adjusting the water content in the landfills. The bioreactor method is used, which accelerates the decomposition of waste and shortens the stabilization period to 5 to 10 years.

In addition, an apparatus for treating sludge for high efficiency and utilizing it as a fertilizer and compost is being actively developed.

However, despite these various methods and apparatus, there is no way to treat the sludge deposited in the invisible river or lake.

For example, most rivers and appeals are illegally thrown away by factory and domestic wastewater, and are wrapped and contaminated, affecting not only the flora and fauna that grow here but also people, but they are left alone because there is no way to effectively deal with them. to be.

The present invention has been made in view of the above-mentioned conventional problems, and its object is to treat sediment sludge accumulated on the bottom of a river or lake, and to separate it into compost or recycle it to the aggregates for civil engineering, or to treat river / ho sediment sludge. It is to provide a system and a method thereof.

It is another object of the present invention to provide a system and method for treating stream / hoc sediment sludge that can clean streams and lakes and protect the environment, as well as the economic benefits of recycling.

The present invention is drawn out to draw the sludge precipitated on the bottom of the river or lake; A separation step of separating the drawn sludge into gravel and sand layers; A debris removal step of removing debris contained in the sludge passing through the gravel and sand layers with a screen; A sludge filtrate treatment step of composting the sludge filtrate from which the contaminants have been removed by planting plants or a physicochemical method; A compression step of washing the separated impurities and compressing them; A stabilization step of stabilizing the compacted contaminants; It is achieved by having a technical feature consisting of; recycling step of cleaning the sand and gravel and recycling it into civil engineering aggregate.

In addition, the present invention has a technical feature that the treatment method using a plant or reeds in the step of treating the sludge filtrate or by adding a chemical treatment can be selectively or in parallel.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First attached Figure 1 shows the opening of the stream / lake sludge treatment system, Figure 2 is a cross-sectional view showing a filtrate treatment plant of the stream / lake sludge treatment system according to the present invention, Figure 3 is a river / lake sludge treatment of the present invention Schematic diagram showing the physical filtrate treatment plant in the system. 4 is an enlarged view illustrating main parts of the present invention.

In the drawings, the system of the present invention is based on treating sludge settled in rivers or lakes, but in some cases, it can also be used for treatment of sludge settled in other uses, such as sea or sewage treatment plant floors. It can be applied regardless of the big and small of.

First, sludge accumulated at the bottom of a river or lake is drawn by a pump. At this time, if the river or appeal is large, it can be drawn using a boat, or it can be drawn by installing a pump at a certain place.

The drawn sludge goes through a separation step and gravel and sand are used. The gravel and sand are then dug into a certain place or filled with tanks to supply the sludge drawn there.

The supplied sludge is gravity-separated and the separated sludge is again subjected to the sediment separation step. This will be described later.

On the other hand, the gravel and sand is washed with water after a certain time and is used as aggregate for civil works after the screening process after washing. In the separation stage, the odor generated from the sludge is sent to a washing tower connected thereto or purified using a biofilter and then discharged to the outside so that the surroundings are not affected.

The sludge passed through the separation step is sent to the removal of contaminants, in which the contaminants are removed through a fine screen, and the sludge filtrate is sent to the filtrate for composting.

The debris removed in the debris removal step is washed by water, reduced in volume using a compressor after washing, and then sent to the landfill after a period of stabilization.

The stabilization step reduces the degree of contamination of the contaminants, which is hardened by compression to be used in landfill cover, and the excess of gravel and sand remaining in the civil works can also be used in landfills.

The sludge sent to the filtrate treatment stage in the contaminant separation step is treated physically-chemically or by biological methods. First, as shown in FIG.

Such a facility digs the existing soil layer 10 to a certain depth, and then installs a sheet for sheeting, that is, an HP-PE sheet 11, and a filter layer 12 is installed thereon, and a non-woven fabric for protecting the filter layer over the filter layer 12 ( 13) is laid.

Here, the order sheet 11 is covered up to the slope 11a generated when digging the existing soil layer 11 to prevent contamination of the existing soil layer, and the sump 20 is buried out of this puddle.

Of course, the sludge is added to the nonwoven fabric 13 and aquatic plants 15, for example, reeds are planted.

This filtrate treatment plant 1 maintains a constant function by the plant 15 such as reeds, the moisture of which evaporates into the atmosphere, and part of the filtrate, which penetrates and dries underground into the filter layer and is again supplied by the next supplied sludge. Done.

The inside of the growing sludge layer is supplied with oxygen to some areas by the inhaled air by planting plants 15 or underground infiltration of sludge water, whereby the organic material contained in the sludge is biological in aerobic, anaerobic and anaerobic areas. As it is oxidized, the sludge is stabilized.

In particular, the reeds of the plant 15 have the advantage of consuming a large amount of nitrogen, so that heavy metals are fixed as non-release compound crystals by stabilization of sewage sludge.

On the other hand, the existing soil layer 10 is provided with a supply tank 30, the sludge supplied through the step of removing the contaminant is collected, the sludge filtrate through the pump 31 and the pipe 32 installed in the supply tank to the pond. It is supplied.

In addition, the water collecting tank 20 is installed adjacent to the supply tank 30, and the water collecting tank receives the sludge water, that is, the sludge water supplied by the water supply pipe 21 connected to the pond for sludge water penetrating the filter layer 11. The water is collected and penetrated underground through the pump 22.

In the drawing, reference numeral 23 denotes a water level regulator, and when a certain level is exceeded, the pump operates to pump the sludge water.

The physico-chemical treatment plant in parallel or separately installed with the biological treatment plant, first, the storage tank 110 and the chemical reaction tank 120, the stirring tank 130, the solid-liquid separation tank 140, and the flocculant stirring tank 150 in which the sludge filtrate is collected. ) And the like.

The storage tank 110 agitates the introduced sludge filtrate through the stirrer 111 and injects the filtrate into the chemical reaction tank 120 through the pump 112, in which case stirring is performed at high speed.

In the chemical reaction tank 120, the stirrer 121 is also installed and stirred, and the pH-adjusting reagent is supplied thereto, and is connected with the metal ion equipment and the polymer, that is, the polymer is supplied again.

After the chemical reaction, the sludge is sent to the agitation tank 130, the agitation of the sludge filtrate at low speed in the agitation tank 130 to allow the flocculation reaction and the floc to grow.

After the low-speed stirring, the sludge is introduced into the settling tank 140 to be precipitated, and an inclined plate 141 is installed at the top of the settling tank, thereby discharging the upper side sludge water to allow underground penetration.

The sludge precipitated at the bottom of the settling tank 140 is forcibly drawn again and supplied to the chemical storage tank 150.

The sludge stored in the chemical storage tank 150 is sent to the coagulant mixing tank 160 through the pump 151, the coagulant is mixed in the mixing tank, and then introduced into the ripening through the dehydrator 170 to compost.

The sludge generated during the dehydration process is made to penetrate underground and the supernatant from the reservoir is also penetrated underground.

In addition, the sludge water generated in the physico-chemical treatment plant, that is, the sludge water generated in the precipitation tank 140 or the chemical storage tank may be utilized in the removal of contaminants as the heavy water, the gravel, sand cleaning step.

As described above, the present invention draws sludge settled in a river or lake to be separated by gravity in the gravel / sand layer, and the sludge filtrate is treated as compost in a filtrate treatment plant through a segregation step.

In addition, the gravel and sand is used as a civil engineering aggregate after cleaning, and the surplus is used as a cover material of a landfill.

As described above, the present invention is to compost the sludge settled on the bottom of the river / lake, etc. to be recycled, and in this process, the gravel and sand separating the sludge is utilized as a civil engineering aggregate, it is a very economic invention.

In addition, the present invention is an invention that can protect the natural environment as well as the animals and plants that grow here by protecting rivers and appeal.

Claims (4)

A drawer for drawing sludge deposited on the bottom of a river or lake; Gravel and sand layers to separate drawn sludge; A screen for removing impurities contained in the sludge passing through the gravel and sand layer; A filtrate treatment plant for composting sludge filtrate from which contaminants have been removed by planting plants or physicochemical methods; A stream sludge treatment system comprising: a compressor for cleaning the separated contaminants and compressing them. According to claim 1, wherein the filtrate treatment plant to excavate the existing soil layer to make a pond, and to place the filter sheet on the existing soil layer and to install a filter layer thereon, to cover the non-woven fabric on the filter layer so that the sludge is stabilized, reeds here Stream sludge treatment system, characterized in that the planting so that the drying is carried out, and the sludge water penetrated into the filter layer is collected in the sump tank so that underground penetration is made through the pump. The method of claim 1, wherein the filtrate treatment plant has a storage tank for storing the sludge with a stirrer, a reaction tank for introducing a PH-adjusting reagent and a polymer into the sludge that passed through the storage tank to cause a chemical reaction, and the sludge after the chemical reaction A stream sludge treatment system comprising: a sedimentation tank for sedimentation, a storage tank for drawing sludge settled in the sedimentation tank and storing it again, a flocculation tank for injecting a flocculant into the sludge, and a dehydrator. A drawing step for drawing sludge deposited on the bottom of a river or an appeal; A separation step of separating the drawn sludge into gravel and sand layers; A debris removal step of removing debris contained in the sludge passing through the gravel and sand layers with a screen; A sludge filtrate treatment step of composting the sludge filtrate from which the contaminants have been removed by planting plants or a physicochemical method; A compression step of washing the separated impurities and compressing them; A stabilization step of stabilizing the compacted contaminants; Stream sludge treatment method characterized in that consisting of; recycling step of washing the sand and gravel to recycle to civil engineering aggregate.

Images