JPH05317856A - Regeneration treatment of general waste water - Google Patents

Abstract

PURPOSE:To solve the problem of the generation of smells in intermediate water which heretofore occurs in the temp. rise of treated water by changing a method for obtaining the inflow pressure of general waste water to an ultrafilter membrane device by the conventional circulating pressurizing pump to a method for providing a height difference between a general waste water control tank and the ultrafilter membrane device connected to this tank by a water feed pipe, and obtaining this height difference as the pressure of the general waste water flowing downward. CONSTITUTION:The method for making the regeneration treatment of the general waste water by passing the water through the ultrafilter membrane device is constituted in the following manner. The general waste water control tank 2 into which the general waste water flows is installed in the upper story of a building and the ultrafilter membrane device 3 connected to the general waste water control tank 2 by the water feed pipe 1b is installed in the story lower than the story where the general waste water control tank 2 is installed. The general waste water is run to the ultrafilter membrane device 3 and is filtered by utilizing the head pressure from the general waste water control tank 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating sewage produced by producing sewage from sewage, and in particular it utilizes the difference in installation height between a sewage adjusting tank and an ultrafiltration membrane device for ultrafiltration. The waste water is passed through the filtration membrane device.

[0002]

2. Description of the Related Art As shown in FIG. 2, in order to retreat conventional gray water to gray water by an ultrafiltration membrane device c, the gray water is stored in a gray water adjusting tank a provided underground. .. After that, the sewage is pressurized from the sewage adjusting tank a by a certain amount by the circulation pressurizing pump b, the ultrafiltration membrane device c filters the organic substances and bacteria, and the resulting sewage is stored. It was stored in tank d. On the other hand, untreated miscellaneous wastewater was returned to the original state and circulated, and again sent to the ultrafiltration membrane device c and filtered. The intermediate water stored in the storage tank d in this manner is sent from the storage tank d through the water supply pump e and, if necessary, through each water pipe for flush toilets, air conditioning makeup water, and sprinkling water. Was being used. In addition, the amount of gray water exceeding the capacity of the storage tank d was drained as it was. On the other hand, in the conventional method for reprocessing sewage waste water, which comprises the sewage adjustment tank a, the circulation pressurizing pump b, the ultrafiltration membrane device c and the storage tank d, the storage tank d is provided in the underfloor pit. The entire building was installed flat on the same floor such as the underground machine room.

[0003]

In the conventional method for reprocessing gray water, the gray water once stored in the gray water adjusting tank is sent to the ultrafiltration membrane device after increasing the water pressure by the circulation pressurizing pump. It was By using a circulation pressurizing pump that circulates the wastewater adjusting tank and the ultrafiltration membrane device, the sewage is warmed by the heat of the motor used for the circulation pressurizing pump, etc.
The temperature of the gray water increased and the water quality changed. Even if the wastewater whose water quality has changed in this way is treated with an ultrafiltration membrane device, the resulting sewage produces an odor when used for flushing toilets, makeup water for air conditioning, or sprinkling. was there.

In view of the above, the present invention provides a height difference between the extraneous discharge adjusting tank into which the extraneous wastewater flows and the ultrafiltration membrane device, and controls the head pressure of the extraneous wastewater sent from the extraneous water adjusting tank to the ultrafiltration membrane device. The purpose of the invention is to prevent the odor generation of the intermediate water by preventing the temperature rise of the treated water by the motor of the conventional circulation pressurizing pump by making it act on the ultrafiltration membrane device.

[0005]

In order to achieve the above object, the present invention installs a sewage control tank into which sewage flows into the upper floors of a building, and connects the sewage control tank with a water supply pipe. The outer filtration membrane device was installed on the lower floor from the place where the miscellaneous drainage adjustment tank was installed, and the miscellaneous wastewater was flowed from the miscellaneous drainage adjustment tank to the ultrafiltration membrane device using the head pressure to perform filtration.

[0006]

[Operation] Water used in various places in the building is collected as miscellaneous wastewater in a miscellaneous wastewater adjustment tank installed on the upper floors of the building.
The sewage collected in the sewage adjustment tank flows down from the installation location of the sewage adjustment tank to the ultrafiltration membrane device installed on the lower floor through the water pipe. Due to this spilled effluent, a head pressure corresponding to the height difference between the effluent adjustment tank and the ultrafiltration membrane device is generated, and this head pressure is required when the effluent is filtered by the ultrafiltration membrane device. Acts as an inflow pressure. In this way, the wastewater is filtered by the ultrafiltration membrane device without using the circulation pressurizing pump, so there is no rise in the temperature of the wastewater due to the heat generated by the motor of the circulation pressurizing pump. The generation of odor in the inside water due to changes is suppressed.

[0007]

The present invention will be described with reference to FIG. When regenerating wastewater, for example, wastewater from various places in the building is drained 1
It is sent to the miscellaneous waste water adjusting tank 2 through a, and is sent from the miscellaneous waste water adjusting tank 2 to the ultrafiltration membrane device 3 through the water supply pipe 1b. The gray water control tank 2 is installed on the upper floor of the building, and the ultrafiltration membrane device 3 is provided on the lower floor below the water control tank 2. The filtration membrane of the ultrafiltration membrane device 3 is selected according to the quality of the gray water. Further, the intermediate water treated by the ultrafiltration membrane device 3 is stored in the storage tank 4 and is supplied to various parts of the building through the water supply pump 5 and the water supply pipe 1d.

In the regenerating process constructed as described above, the water used at various places in the building is sent to the miscellaneous drainage adjusting tank 2 as the miscellaneous drainage through the drainage pipes 1a provided at the various places. On the other hand, in the case of wastewater containing a large amount of fats and oils discharged from the kitchen equipment or the like, it is sent to the wastewater adjusting tank 2 after removing the fats and oils and contaminants by the primary treatment device such as the grease trap 1. The miscellaneous wastewater once stored in the miscellaneous wastewater adjusting tank 2 goes down the water pipe 1b to the ultrafiltration membrane device 3 due to the height difference previously provided between the miscellaneous wastewater adjusting tank 2 and the ultrafiltration membrane device 3. Inflow. The height difference H is set so that the head pressure of the miscellaneous waste water flowing down the water supply pipe 1b becomes the inflow pressure required for the ultrafiltration membrane device 3 to function. In this way, the miscellaneous wastewater is filtered to be gray water by the water head pressure utilizing the height difference H acting as an inflow pressure to the ultrafiltration membrane device 3. Middle water is stored in a storage tank 4 such as an underfloor pit of a building through a water pipe 1c. The stored once stored water is sent to a necessary place on each floor of the building through the water supply pipe 1d via the water supply pump 5, and is used for flush toilets, air-conditioning makeup water, water sprinkling, etc. at any time.
In addition, when there is more inflowing effluent than the amount of water sent to the ultrafiltration membrane device 3 in the effluent drainage adjustment tank 2, it is drained by that amount through the drainage pipe 2a, and is also regenerated by the ultrafiltration membrane device 3. When the amount of water exceeds the amount of water sent to the storage tank 4, the water is drained through the drain pipe 2b. In addition, the upper floor of the gray water control tank 2 and the lower floor of the ultrafiltration membrane device 3 as installation locations are selected from other high and low places of the building as long as the required height difference is obtained. But it's okay.

[0009]

According to the present invention, due to the head difference between the miscellaneous drainage adjusting tank and the ultrafiltration membrane device, a necessary inflow pressure into the ultrafiltration membrane device is generated, and a circulation pressurizing pump is used as in the conventional case. Since the above is not used, there is no factor for raising the temperature of the circulating water due to the heat generation of the motor of the circulating pressurizing pump, and it is possible to eliminate the generation of the odor of tap water that is reprocessed by filtration. Further, since the circulation pressurizing pump is not used, the system becomes simple and maintenance becomes easy.

[Brief description of drawings]

FIG. 1 is an explanatory view of a method for recycling and processing gray water according to the present invention.

FIG. 2 is an explanatory diagram of a method for regenerating and treating gray water using a conventional circulation pressurizing pump.

[Explanation of symbols]

 2 Miscellaneous wastewater adjusting tank 3 Ultrafiltration membrane device H Installation height difference between the miscellaneous drainage adjusting tank and ultrafiltration membrane device

Claims (1)

[Claims] 1. A method of reclaiming gray water by passing gray water through an ultrafiltration membrane device to produce gray water, wherein a gray water adjusting tank, into which gray water flows, is installed on an upper floor of a building. Install the ultrafiltration membrane device connected by the adjustment tank and the water supply pipe on the lower floor from the place where the miscellaneous drainage adjustment tank is installed, and use the head pressure from the miscellaneous drainage adjustment tank to flow the miscellaneous wastewater to the ultrafiltration membrane device. A method for reclaiming gray water, which comprises filtering.