JPS6329042B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating surplus water from a water surface landfill using dredged mud, waste, land earth, and the like.

Conventional methods for treating surplus water include direct injection of coagulant into muddy water pipes or shower addition method;
Various methods have been used, such as installing a coagulation sedimentation tank and installing a sand filter tank, but these methods cannot cope with changes in the quality of surplus water during the reclamation process, or need to be used only at the final stage of construction. There are many cases where the cost of surplus water treatment facilities was not appropriate from the economical point of view of the overall reclamation work. The major causes of these problems include the fact that each of the above construction methods has a function to make the wastewater concentration of wastewater clearer than necessary, and that changes in the water quality of wastewater from landfills have not been ascertained. .

In the present invention, the drainage standard for surplus water is the amount of suspended solids (SS).
= 50ppm or less, and consists of a double filtration method of direct injection of flocculant, pre-treatment filtration and adsorption filtration, without extremely reducing the amount of suspended solids in surplus water. This is a coagulation filtration method that reliably satisfies wastewater standards. The content of the invention will be explained below with reference to the drawings.

FIG. 1 is a plan view illustrating the surplus water filtration method of the present invention. In the figure, a chemical injection device is installed at an arbitrary position of a mud drain pipe 2 that flows muddy water into a reclaimed land surrounded by a reclaimed seawall 1. Step 3: Inject the flocculant. The surplus water generated in the landfill bypasses the tip of the diversion embankment 4 and passes through the pre-treatment filter 5 and adsorption filter 6 to reduce the amount of suspended solids and bring the water quality below the wastewater standard value. It flows out from waterway 7 into the surrounding water area.

FIG. 2 shows the pretreatment filter and adsorption cross-sectional configuration of the present invention. The cross section of the water-permeable membrane is changed through the device, and at this time, the brush 12 scrapes the suspended agglomerated particles in the residual water adhering to the surface of the water-permeable membrane downward. The frame 13 is attached to the holding stakes 14.

The adsorption filter body is constructed by stacking coarse filter media 15 in mesh bags and storing them in fence plates 16 provided on the holding stakes on both sides. As the construction progresses, the surface of the settled mud 17 in the landfill will rise and the lower part of the permeable membrane will be buried, but the filtration function of the upper part can be maintained. The filtration device foundation 18 is constructed of general earth and sand.

FIG. 3 is a front view of the pretreatment filter of the present invention, in which the water permeable membrane 8 is connected to the drive pulley 9 and the reversing pulley 10.
The frame 13 is attached to a holding stake 14 at the rear.

As a test example of the coagulation sedimentation filtration method of the present invention explained above, the amount of suspended solids (SS) of inflow surplus water = 60 ppm
(average), pre-treatment filter (SS) = 20ppm
(On average) The adsorption filtration device reduces SS by approximately 15 ppm (on average). This indicates that the aggregated particles in the residual water are almost captured by the water-permeable membrane of the pretreatment filter. The type of flocculant, the amount of chemical injection, the material of the permeable membrane, etc. are set according to the local water quality.

[Brief explanation of drawings]

FIG. 1 is a plan view illustrating the surplus water filtration method of the present invention, in which 1 is a reclaimed bank, 2 is a sludge pipe,
3 is a chemical injection device, 4 is a diversion embankment, 5 is a pretreatment filter, 6 is an adsorption filter, and 7 is a spillway. Second
The figure shows the installation cross-sectional configuration of the pre-treatment filter and adsorption filter of the present invention, in which 1 is a landfill revetment, 7 is a spillway, 8 is a permeable membrane, 9 is a driving pulley, 10 is a reversing pulley, 11 12 is a drive device, 12 is a brush, 13 is a frame, 14 is a holding stake, 15 is a coarse filter medium, 16
1 is a fence board, 17 is sedimentary mud, and 18 is a filtration device foundation. FIG. 3 is a front view of the pretreatment filter of the present invention, in which 8 is a permeable membrane, 9 is a driving pulley, 10 is a reversing pulley, 13 is a frame, and 14 is a holding stake.

Claims (1)

[Claims] 1. A coarse filter medium holding frame is provided inside the landfill of the landfill spillway, and an adsorption filter is constructed by accommodating the coarse filter medium in a mesh bag within the holding frame, and the spillwater inflow side of the adsorption filter is A pre-treatment filter consisting of a water-permeable membrane rotatably connected is installed in the tank, and a flocculant is injected into the sludge pipe flowing into the landfill using a two-stage filtration device consisting of a pre-treatment filter and an adsorption filter. By using this method, the agglomerated particles of leftover water generated in the landfill are removed by the permeable membrane surface of the pretreatment filter, and the fine soil particles that have passed through the permeable membrane surface are removed by the adsorption filter, thereby reducing the suspension of leftover water. A coagulation filtration treatment method for wastewater from a landfill characterized by reducing the amount of substances.