JPS60110399A - Recirculation type water region purifying system - Google Patents

Abstract

PURPOSE:To improve the water quality of a water region, by forming an aquatic plant culture water region to a part of a water area such as lakes and marshes so as to be demarcated through a water pervious demarcating body for preventing the outflow of aquatic plants and pumping up raw water of a place separated from the aquatic plant culture water region of the water area to supply the same to the aquatic plant culture water region. CONSTITUTION:The culture water region B of an aquatic plant such as a water hyacinth is provided to a part of a water area A such as lakes and marshes. This aquatic plant culture water region B is formed so as to be demarcated through a water pervious demarcating body C comprising a net having a mesh not flowing out aquatic plants. In this case, raw water is pumped up at a place sufficiently separated from the water area A to be sent to the aquatic plant culture region B through a water feed pipe d2.

Description

[Detailed Description of the Invention] In recent years, the water quality of lakes and marshes has become increasingly eutrophic due to the large influx of industrial and domestic wastewater, which not only causes deterioration of the landscape due to the overgrowth of tall plants such as reeds. Especially in urban areas, it is causing serious social problems such as deterioration of water resources.

The present invention is one of the measures against eutrophication as described below.
The purpose of this system is to purify water by utilizing the nutrient absorption properties of aquatic plants such as water hyacinth.
The purpose of the present invention is to provide a system that is effective in purifying entire bodies of water, such as lakes and marshes, where there are no rivers, waterways, etc. where wastewater flows in from the surrounding area, but where there is no outlet.

Unexploded E! was taken to achieve the stated purpose! The circulating water purification system according to A divides a part of a water area such as a lake into a water area for cultivating aquatic plants through a water-permeable partitioning body that can prevent the outflow of aquatic plants. The system is characterized by being equipped with equipment that draws raw water from a location sufficiently far away from the aquatic plant cultivation area and sends it to the aquatic plant cultivation area, resulting in the following effects. .

In other words, by sequentially flowing the stagnant water in the entire body of water such as lakes and marshes to the aquatic plant cultivation area via water supply equipment such as pumps, the water is purified by the nutrient absorption action of the aquatic plants. As the purified water circulates, the nutrient concentration in the entire water area gradually decreases, and the water quality is gradually purified. Therefore, the present invention is particularly effective in purifying entire bodies of water, such as closed lakes and marshes where sewage flows in from the surrounding area but has no rivers or channels to drain, where water tends to stagnate.

Embodiments of the invention will be described in detail based on the drawings.

In Figures 1 and 2, the target is an example of a water area to be purified, such as a lake, and an aquatic plant cultivation area (B
) is partitioned through the water-permeable partition body tel.
The above-mentioned water-permeable compartment (tc) is made up of a weir supporting a net with a mesh that prevents aquatic substances from flowing out. By blowing air upwards, oxygen in the air is dissolved in the water, and the vertical mixing of ice blocks is promoted, and nutrients in the bottom layer and lower layers of the water body are supplied to the surface layer (water surface), which makes it possible for the water to grow like water hyacinth. It has the function of preventing a lack of nutrient absorption pressure from the surface layer of a floating aquatic fountain.

■) is a submersible pump (dl) that pumps raw water from a water area (Al
V
This is a water supply facility consisting of a water supply pipe (d2) for transporting C, and the raw water sent through this water supply and facility) passes through a downstream contact oxidation waterway tF) to an aquatic plant cultivation area (B)l.
l'i: Allowed to flow in.

As shown in Figure 3, the falling contact oxidation waterway is a flowing waterway that uses falling pressure without using power, by arranging various types of contact oxidation waterways (f,) in a plane. This is to prevent a large amount of microorganisms from adhering to the roots of aquatic plants when the BOD of inflow water is high, thereby inhibiting the ability of the roots to absorb nitrogen and phosphorus.

Next, other examples will be listed.

(Il) The area from the bottom of the water-permeable partition (01, aquatic plant cultivation zone tB) to the middle position of the depth is configured as a water-impermeable partition, and the area beyond that is configured as a water-permeable partition. In this case, It is possible to keep the water level in the aquatic plant cultivation area constant at all times, and the water is constantly supplied by the pump, so it never runs out.It also has the advantage of making it easier to settle floating matter.

(n) A portion of the water-permeable partition (Q) including the free liquid surface and extending above and below it is configured as a water-impermeable partition wall or a partition wall having a large number of very fine water holes, and 1. The part located below this is configured as a water-permeable partition wall. If this is used, water for cultivating aquatic plants such as water hyacinth *
(Water surface in Dl): A water column in which only VC floats (there is an advantage that it can effectively prevent the outflow to other water bodies CB+).

For example, when using an aquatic plant such as chlorella that has the property of floating widely in water, the water-permeable partition body (C) should be used to prevent the aquatic plant from flowing through and to allow water to flow out. It is best to use a thin mesh net (synthetic resin bag net) that allows

In addition, as a modification of this embodiment, the water permeable partition body (
Only the portion of C1 located in one lower interlayer of water is composed of the above-mentioned net or a substance having the same function.

[ffl It is also possible to further activate the activities of aquatic plants by providing something that emits ultraviolet rays, such as an ultraviolet lamp, near the aquatic plants in the aquatic plant cultivation area fBl.

If there is a flow path into which sewage flows into the leap area, the sewage in this flow path is used to flow into the aquatic plant cultivation area tBl.

[Brief explanation of the drawing]

The drawings show an embodiment of the circulating water purification system according to the present invention, in which Fig. 1 is a schematic plan view of the water area to be purified, Fig. 2 is a schematic vertical cross-sectional view, and Fig. 3 is a conceptual diagram of a flowing contact oxidation waterway. It is. Capacity: Water bodies such as lakes, tu): Aquatic plant cultivation areas, (C): Water-permeable compartments, (D
l...Raw water transmission equipment. Agent Patent Attorney Osamu Kitamura

Claims (1)

[Claims] An aquatic plant cultivation area fB) is formed in a part of a water body such as a lake through a water-permeable partition body (Q) that can prevent the outflow of aquatic pores, and the aquatic (direct plant) of the water body Cultivation water area (Pump up raw water from a place sufficiently far away from B1 and transfer it to the aquatic plant cultivation area (of the equipment that supplies water to Bl)
It is equipped with a circulating water purification system.