CN-122010326-A - Rural domestic sewage water separation treatment and resource utilization system and method

CN122010326ACN 122010326 ACN122010326 ACN 122010326ACN-122010326-A

Abstract

The invention belongs to the technical field of environmental engineering, and particularly relates to a rural domestic sewage water separation treatment and resource utilization system and method. The sewage treatment device comprises a pretreatment system, a sewage treatment system and a bottom mud excrement recycling system, wherein an intelligent control device is further arranged on a water outlet pipe, the intelligent control device comprises a water quality detection device, an intelligent valve device and a controller, the water quality detection device is used for rapidly detecting water quality, the intelligent valve device is used for controlling the water outlet pipe to be communicated with a water distribution pipe/an inlet pipe, and the controller is used for controlling the intelligent valve device according to the detection result of the water quality detection device, so that the technical problem that in the prior art, due to the fact that a household bathroom and a bathroom share, ash water such as bath water enters a household septic tank, the residence time of excrement in the household septic tank is less than 60 days, and anaerobic treatment time is insufficient is avoided.

Inventors

ZHANG CHUNMIN
JIN ZHUJING
SHANG ZHENGRONG
DENG PINGHUA
LI JIAYU
YANG JINGNING
LI WENQING
LEI SHUWAN

Assignees

云南省生态环境科学研究院

Dates

Publication Date: 20260512
Application Date: 20260120

Claims (10)

1. A rural domestic sewage water treatment and resource utilization system consists of a pretreatment system, a sewage treatment system and a bottom mud and excrement resource utilization system, and is characterized in that, The pretreatment system consists of a pretreatment pool, a sedimentation zone and a water outlet zone, wherein a water inlet pipe is arranged on the pretreatment pool; the sedimentation zone is arranged at one side of the pretreatment tank, which is provided with the water inlet pipe, and at the bottom, the water outlet zone is arranged at the upper part of one side of the pretreatment tank, which is not provided with the water inlet pipe, the bottom of the water outlet zone is separated from the sedimentation zone by the bottom of the water outlet zone, one side of the water outlet zone, which is close to the water inlet pipe, is separated from the sedimentation zone by a filter plate which is obliquely arranged, and one side of the water outlet zone, which is far away from the water inlet pipe, is provided with an oblique landslide, and the bottom of the landslide is provided with a bottom mud discharge port; The sewage treatment system is arranged at one side of the pretreatment tank, and consists of a low-concentration treatment area and a high-concentration treatment area, wherein the low-concentration treatment area is arranged at the upper part of the high-concentration treatment area and is separated from the high-concentration treatment area through a baffle plate; the low-concentration treatment area consists of an anti-blocking filler layer arranged on the partition board, a filler layer arranged on the anti-blocking filler layer and a soil covering layer arranged on the filler layer, wherein a water distribution pipe is further arranged between the filler layer and the anti-blocking filler layer, the water inlet end of the water distribution pipe is communicated with the water outlet pipe, a purified water outlet is arranged between the filler layer and the soil covering layer, and the purified water outlet is arranged at one side, far away from the water inlet pipe, of the low-concentration treatment area; The excrement recycling system comprises a treatment tank and a stirrer, wherein the treatment tank is of a closed tank body structure, a sediment inlet communicated with a sediment discharge port is formed in the upper portion of one side of the treatment tank, a feeding ventilation pipe communicated to the inside of the treatment tank is further arranged on the upper surface of the treatment tank, the stirrer consists of a stirring motor and stirring paddles, the stirring motor is arranged on one side of the treatment tank, the stirring paddles are arranged in the treatment tank and driven by the stirring motor, and a mixture outlet is formed in the bottom of the other side, opposite to the sediment inlet, of the treatment tank.
2. The rural domestic sewage water treatment and recycling system according to claim 1, wherein the included angle between the filter plate and the horizontal direction is 30-60 degrees.
3. The rural domestic sewage water treatment and recycling system according to claim 1, wherein the filler in the anti-clogging filler layer is porous filler, the particle size of the porous filler is 5-8cm, and the particle size of the filler in the filler layer is 4-6cm.
4. The rural domestic sewage treatment and recycling system according to claim 1, wherein the water distribution pipe is wrapped with a geotechnical cloth layer, water distribution holes are formed in the water distribution pipe, and the water distribution holes are formed in the top of the water distribution pipe.
5. The rural domestic sewage water treatment and recycling system according to claim 1, wherein a lifting pump is further arranged at the bottom of the water outlet area, an inlet of the lifting pump is communicated into the water outlet area, and an outlet of the lifting pump is communicated to the water outlet pipe.
6. The rural domestic sewage quality treatment and recycling system according to claim 1, wherein the water outlet pipe is further provided with an intelligent control device, the intelligent control device comprises a water quality detection device, an intelligent valve device and a controller, the water quality detection device is used for rapidly detecting water quality, the intelligent valve device is used for controlling the water outlet pipe to be communicated with the water distribution pipe/inlet pipe, and the controller is used for controlling the intelligent valve device according to the detection result of the water quality detection device.
7. The rural domestic sewage quality treatment and resource utilization system according to claim 3, wherein the porous filler is a PP porous suspending ball filler or a porous spherical suspending filler, the porosity is more than 99%, and the specific surface area is 580-680m2/m3.
8. The rural domestic sewage water treatment and recycling system according to claim 1, wherein one end of the landslide close to the water inlet pipe is a slope top, one end of the landslide close to the water outlet pipe is a slope bottom, and the slope of the landslide is 1% -3%.
9. The rural domestic sewage quality treatment and resource utilization system according to claim 1, wherein the bionic filler is a high specific surface area bionic filler, in particular a cluster-type habitat filler made of staggered fiber screens, and the specific surface area of the bionic filler is 800-1200 m2/m3.
10. A rural domestic sewage quality treatment and resource utilization method is characterized by comprising the following steps: S1, pretreatment, namely, rural domestic sewage enters a pretreatment tank, suspended matters in the inlet water enter a precipitation area after being filtered by a filter plate, and the filtered sewage enters a water outlet area; s2, separating the sewage into quality, analyzing the water quality of a water outlet area by a water quality detection device, controlling an intelligent valve device to enable a water outlet pipe to be communicated with an inlet pipe by a controller if the COD in the sewage is more than or equal to 500mg/L, enabling the water outlet pipe to be communicated with a water distribution pipe by the controller if the COD in the sewage is less than 500mg/L, starting a lifting pump, and enabling the sewage to enter a high-concentration treatment area or a low-concentration treatment area; S3, purifying water, namely, after sewage enters a high-concentration treatment area, hanging the high-specific-surface-area bionic filler on a partition plate to provide a implantation space for anaerobic microorganisms, so that anaerobic treatment of the sewage is facilitated, and water after the anaerobic treatment reaches the standard is discharged outside through a purified water outlet or enters a treatment tank; After the sewage enters the low-concentration treatment area, impurities in the sewage are removed through filtration of porous filler, filler and soil in the soil covering layer, and in the purification process, water can be provided for plants in the soil covering layer, and organic matters in the sewage can be used as nutrients for plant growth; s4, recycling the bottom sludge, wherein suspended matters in the step S1 are concentrated in the sedimentation area and then are used as the bottom sludge to sink into the bottom of the sedimentation area, slide towards a bottom sludge discharge port under the action of a landslide, and enter the inside of the treatment tank through a bottom sludge inlet, plant straws, residues and livestock manure generated in the low-concentration treatment area are put into the treatment tank through a feeding ventilation pipe, a stirring motor drives a stirring blade to rotate at a speed of 15-20r/min, so that the materials are uniformly mixed and fermented, and the fermented materials are used as farmyard manure to be returned to the field through a mixture outlet after being decomposed.

Description

Rural domestic sewage water separation treatment and resource utilization system and method Technical Field The invention belongs to the technical field of environmental engineering, and particularly relates to a rural domestic sewage water separation treatment and resource utilization system and method. Background The rural domestic sewage in China has the characteristics of scattered distribution, small water quantity, large water quality fluctuation, difficult collection and the like. Due to the lack of perfect drainage pipe network and treatment facilities for a long time, a large amount of sewage is directly discharged into ditches and pits, so that the problems of black and odorous water, eutrophication and the like frequently occur, and the rural living environment and the safety of drinking water are seriously threatened. In recent years, the country has paid great attention to rural sewage treatment, and the national sewage treatment is used as important content for ecological civilization construction, so that exploration of treatment paths suitable for local areas is promoted. At present, most users in rural areas realize toilet improvement along with the promotion of the toilet revolution in various places of the country, a household septic tank is built, and sewage is treated in an anaerobic mode. However, most of the households share the bathroom, and ash water such as bath water enters the household septic tank, so that the residence time of the excrement in the household septic tank is insufficient (less than 60 days), the anaerobic treatment time is insufficient, and a large amount of particles such as excrement residues flow out. Most farmers have custom of breeding livestock and poultry, and livestock and poultry manure also enters the domestic sewage treatment system along with the pipeline, so that the normal operation of the treatment system is influenced. Disclosure of Invention The application aims to comprehensively treat rural domestic sewage and human and animal manure, and provides a system and a method for the quality treatment and the resource utilization of the rural domestic sewage by reasonable design, so as to realize the quality treatment and the resource utilization of the rural domestic sewage manure. The application is realized by the following technical scheme: a rural domestic sewage quality treatment and resource utilization system consists of a pretreatment system, a sewage treatment system and a bottom mud and excrement resource utilization system, The pretreatment system consists of a pretreatment pool, a sedimentation zone and a water outlet zone, wherein a water inlet pipe is arranged on the pretreatment pool; the sedimentation zone is arranged at one side of the pretreatment tank, which is provided with the water inlet pipe, and at the bottom, the water outlet zone is arranged at the upper part of one side of the pretreatment tank, which is not provided with the water inlet pipe, the bottom of the water outlet zone is separated from the sedimentation zone by the bottom of the water outlet zone, one side of the water outlet zone, which is close to the water inlet pipe, is separated from the sedimentation zone by a filter plate which is obliquely arranged, and one side of the water outlet zone, which is far away from the water inlet pipe, is provided with an oblique landslide, and the bottom of the landslide is provided with a bottom mud discharge port; The sewage treatment system is arranged at one side of the pretreatment tank, and consists of a low-concentration treatment area and a high-concentration treatment area, wherein the low-concentration treatment area is arranged at the upper part of the high-concentration treatment area and is separated from the high-concentration treatment area through a baffle plate; the low-concentration treatment area consists of an anti-blocking filler layer arranged on the partition board, a filler layer arranged on the anti-blocking filler layer and a soil covering layer arranged on the filler layer, wherein a water distribution pipe is further arranged between the filler layer and the anti-blocking filler layer, the water inlet end of the water distribution pipe is communicated with the water outlet pipe, a purified water outlet is arranged between the filler layer and the soil covering layer, and the purified water outlet is arranged at one side, far away from the water inlet pipe, of the low-concentration treatment area; The excrement recycling system comprises a treatment tank and a stirrer, wherein the treatment tank is of a closed tank body structure, a sediment inlet communicated with a sediment discharge port is formed in the upper portion of one side of the treatment tank, a feeding ventilation pipe communicated to the inside of the treatment tank is further arranged on the upper surface of the treatment tank, the stirrer consists of a stirring motor and stirring paddles, the stirring motor is arranged on one side of