JPS5919587A - Apparatus for service water and waste water disposal using rotary disc method - Google Patents

Abstract

PURPOSE:To efficiently remove nutritive salts such as nitrogen and phosphorus from service water or waste water, by providing rotary discs inside a water tank using algae equipped with openings for the inflow and outflow of service water or waste water and light sources above said rotary discs. CONSTITUTION:When service water or waste water flows into a water tank 2 made of concrete through its inflow opening, rotary discs 3 are rotated around a shaft 1 for supporting the rotary discs. Algae such as green ones, e.g. chlorella. chlaminodomus, adhere onto the rotary discs 3. By applying light to the algae- adherent rotary discs 3 from light sources 5, the algae are propagated while digesting nutritive salts, e.g. nitrogen, phosphorus and inorganic carbon, in the water. Thus, the algae adherent onto the rotary discs 3 digest nutritive salts, e.g. nitrogen and phosphorus, during its photosynthesis to remove nitrogen, phosphorus, etc. from the inflow of the water. The water flowing out of the water tank 2 is let flow into a precipitation tank or a sand filter and treated therein.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for removing nitrogen (groups) and phosphorus (P) from industrial wastewater using a rotating disk method, and in particular, a treatment bag for industrial wastewater for removing nutrient salts. Pertains to.

Conventionally, many studies have been conducted regarding the removal of nitrogen (he) and phosphorus (P), which are considered to be the causative agents of eutrophication in industrial wastewater. For example, although there are methods to individually remove nitrogen (he) and phosphorus (CP) using physicochemical treatments, there is currently no process for simultaneous removal, and biological treatments can remove nitrogen (he) and phosphorus (CP). The activated sludge method (using bacteria) is being considered as a process for simultaneously removing methanol and
It is necessary to inject chemicals such as BOD (sewage water, etc.) and alkaline agents, and the treatment operation is also complicated.

In addition, the process of simultaneously removing nitrogen (T) and phosphorus (P) from industrial wastewater using algae such as green algae such as Chlorella chlamydomas is only a matter of understanding the treatment performance in oxidation ponds and lagoons. There have been no attempts to remove nitrogen (He) or phosphorus (P) by artificially creating an environment for algae growth, and there have been no attempts to implement these methods using two fixed tank-type devices. Not at all. This can be attributed to the following reasons. That is, (1) When algae are suspended in wastewater and used, when sunlight passes through the aquarium, the energy of the light is attenuated.
If algae grows, the effective water depth will become even shallower. The effective water depth in industrial wastewater is about 3Qcm, and there is a limit to the amount of algae that can be retained per unit site area.

(11) The amount of solar radiation under natural conditions is limited and also depends on the weather.

(110 Therefore, the installation area of the water tank becomes vast.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and uses algae such as green algae such as Chlorella chlamydomas to attach to a rotating disk in an aquarium, and an artificial light source is applied from above. By providing more light irradiation,
It is also characterized by the removal of nutrients such as nitrogen and phosphorus from industrial wastewater.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral 1 denotes a disk support shaft, which is an axis for supporting and rotating the rotary disk 3. A drive source (not shown) is connected to one end of the shaft 1. Reference numeral 2 is an aquarium used for algae, and an inlet for water and wastewater is provided at the upper left corner, and an outlet is provided at the upper right center.

A light source 5 is used to irradiate light onto the algae attached to the rotating disk 3. 4 is an electric wire for sending electricity from the power source to the light source. In the above configuration, when wastewater flows into the concrete water tank 2 from the inlet,
A rotating disk 3 rotates around a disk support shaft 1, and six pieces of algae such as green algae such as Chlorella and Chlamydomas are deposited on the rotating disk 3.

In this case, by increasing or decreasing the number of rotary disks 3, it is possible to control the amount of algae that lands on the plant. By irradiating light from the light source 5 onto the rotating disk 3 on which algae are attached, the algae ingest nutrients such as nitrogen, phosphorus (P), and inorganic carbon in the wastewater and multiply. In this way, when the algae attached to the rotating disk 3 performs photosynthesis (this
Nutrient salts such as nitrogen (he) and phosphorus are ingested, and nitrogen (he) is absorbed in the inflow of wastewater.

phosphorus CP) etc. are removed. Is the wastewater that flows out of water [2] a settling tank? It flows into a sand filter where it is processed.

The present invention has the above-mentioned configuration, and since it is a wastewater treatment device for algae utilization using the rotating disk method, a large amount of algae can be retained per unit site area, and since the light source is artificial, The illuminance of the algae can be artificially controlled, and the light from the light source reaches the algae directly, so the light is irradiated in the air and there is no light attenuation due to water. Moreover, if the entire treatment apparatus is covered with a dome-shaped cover, continuous irradiation can be performed in an indoor environment, and a large amount of wastewater treatment capacity can be stably obtained.

By increasing or decreasing the number of rotating disks, it is possible to handle a wide range of industrial and wastewater loads. Furthermore, it has the advantages of easy operation, low noise, and a clean appearance.

Example Mg5Oa 7 H2O-2, Off r Fe 8
04 ・2HtO...2.51Ca, C1v...
0.2 g 1Mn5O, T 5H! O...0.25
? +NaMn0. -2H,O-0,01? , N
aC1-・-5,OF.

NF(, CI...10.Of, KtHPO4...
・3.0. ? .

FOTA (dihydrate salt)...10. Of, tap water...
・After aerating synthetic wastewater with a composition of 5001 and supplying carbon dioxide gas, 14CmX 18CmX 5.2Cm (-1
, 31t') and six transparent vinyl chloride rotary disks with an outer diameter of 10 cm% and a thickness of 1 inch were used for treatment according to the procedures shown in Table 1, and the treatment results shown in Table 2 were obtained.

Table 1 Table 2 As mentioned above, according to the results of this experiment, the removal rates of nitrogen and phosphorus were high at approximately 90% and 70%, respectively.

[Brief explanation of the drawing]

1J is a schematic side sectional view of a specific device according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. Engineering... Disc support shaft 2... Water tank 3... Rotating disc 4... Power source 5... Light
Source Procedure Amendment v# (Method) November 22, 1980 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of Case Patent Application 1983-127681, Title of Invention Waste Water Treatment Apparatus Using Rotating Disc Method 3, Representative of the person making the amendment Takashi Takato W4 Takashi 4, agent October 26, 1982 (shipment date) 6. Specification subject to amendment 7. Engraving of the detailed statement of the contents of the amendment (No change in content 2 (Description) (The frame of the table inside is clearly described)

Claims (1)

[Claims] A rotating disk method comprising: an algae-utilizing aquarium equipped with an inlet and an outlet for water and wastewater; a rotating disk infiltrating the aquarium; and a light source positioned above the rotating disk. Wastewater treatment equipment using.