JPS5853123B2 - How to dump sludge - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sludge dumping method.

Conventionally, sludge, such as sludge with a high water content, has been treated using methods such as mechanical dewatering and cement solidification, but these methods take a long time to process and prevent secondary pollution when reused in landfills. It was not satisfactory in these respects.

Therefore, recently, after adding a flocculant to the sludge, the sludge is put into a concentration tank and concentrated, and the concentrated sludge is taken out and a coagulant (for example, a sulfate-based coagulant such as a hydraulic lath type coagulant) is added and then mixed. A method has been considered in which a hardening agent (for example, a silicate hardening agent such as an acid or an oxidizing substance) is added to the concentrated waste, mixed, and then disposed of in a landfill or the like.

This dumped concentrated sludge retains water in the sludge and solidifies during the solidification process, so it is necessary to dry it under the sun to remove the water inside.

However, when a large amount of sludge is to be treated, a large area is required for drying.

Therefore, the present invention provides a sludge dumping method that makes it easy to dispose of sludge by effectively utilizing a narrow area.
An example of this will be described below based on FIG. 1.

The dumping site is surrounded by an outer frame 1 and divided into a plurality of sections by partition frames 2.

The sludge that has been solidified with the addition of a solidifying agent is dumped into each compartment in a sequential manner as if it were being circulated, and is laterally removed depending on the solidification situation.

In other words, A is during dumping where concentrated sludge is dumped, B is
indicates that the dumped sludge is being dried by the sun, etc., and C indicates that the solid sludge is being held horizontally after the internal water has been removed by drying. By doing so, a state like Il-2 will occur, and this will be repeated.

2 to 4 show another embodiment.

That is, 3 is a dumping site revetment made of steel sheet piles or the like and is formed in a rectangular shape, and a base 4 is formed inside the rectangular revetment.

An annular portion is formed on the base 4 by the outer frame 5 and the inner frame 6, and this annular portion is divided into a plurality of sections by the partition frame 2.

7 is a re-dumping site located inside, and is formed of soft and strong ground.

In this embodiment, the portions other than the dumping mid-in and horizontal holding areas C are being dried, and the dumping mid-in areas are sequentially circulated following the horizontal holding areas as shown by the arrow.

Note that 8 indicates concentrated sludge, and 9 indicates solid sludge.

The dumping site revetment 3 may be formed of solid sludge, and in this case, water can be drained well.

According to the present invention described in the embodiments above, the dumping, drying, and horizontal holding of sludge are sequentially carried out in a divided dumping area, so even if a large amount of sludge is to be disposed of, The sludge can be easily disposed of by making effective use of a small area, and the soil is improved by drying under the sun before being dumped, making it especially effective for dumping on soft dumping grounds. be able to.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing one embodiment of the present invention, Figs. 2 to 4 show other embodiments, Fig. 2 is a plan view, and Figs. FIG. 1...outer frame, 2...partition frame, 3...
...Dumping site revetment, 4...Foundation, 5...
...outer frame, 6...inner frame, 7...re-dumping site.

Claims (1)

[Claims] 1. A sludge dumping method characterized by sequentially dumping sludge to which a solidifying agent has been added into a plurality of divided dumping areas as if circulating, and removing it horizontally depending on the solidification status.