CN111547950A

CN111547950A - Ecological toilet sewage treatment system and treatment process

Info

Publication number: CN111547950A
Application number: CN202010431332.0A
Authority: CN
Inventors: 曾绍勇; 魏平; 邓克虎
Original assignee: Sichuan Xingchen Xinhai Ecological Environmental Protection Technology Co ltd
Current assignee: Sichuan Xingchen Xinhai Ecological Environmental Protection Technology Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-08-18

Abstract

The invention discloses a sewage treatment system and a sewage treatment process for an ecological toilet, which comprise a primary sedimentation tank, an anaerobic tank, an anoxic tank, an aerobic tank and a clean water tank, wherein an overflow weir is arranged in the primary sedimentation tank, sewage automatically flows into the anoxic tank through the overflow weir, the anaerobic tank performs fermentation treatment on the sewage by using anaerobic bacteria, the anoxic tank is used for adsorbing suspended matters in the sewage, performing net capture, performing biological flocculation and performing biological degradation, and the aerobic tank performs degradation and purification on organic matters in the sewage by using aerobic organisms; the aerobic tank comprises a tank body, a die carrier, a filtering membrane, a water distributor and a gas distribution system, wherein the die carrier and the water distributor are arranged in the tank body, the filtering membrane is arranged in the center of the tank body, and a biological membrane is arranged on the die carrier; the air distribution system comprises an aeration pipe, and the aeration pipe is arranged at the bottom of the tank body. The invention has the advantages of high biodegradation speed, small occupied area, low capital investment and operation cost and the like, and is particularly suitable for treating small-sized wastewater.

Description

Ecological toilet sewage treatment system and treatment process

Technical Field

The invention relates to the technical field of sewage treatment of ecological toilets, in particular to a sewage treatment system and a sewage treatment process for an ecological toilet.

Background

With the development of cities, the increasing importance of governments on urban environmental protection and the stricter sewage discharge, the great investment of the nation on public health, ecological toilets are built in all places. Because the sewage produced by the toilet can not enter the urban pipe network, a sewage treatment system needs to be established near the ecological toilet, but the existing sewage treatment system has larger volume, large floor area, low treatment efficiency and higher cost, and is not beneficial to the popularization of the ecological toilet wastewater treatment.

Disclosure of Invention

The invention aims to provide an efficient and environment-friendly ecological toilet sewage treatment system and a treatment process.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a sewage treatment system for an ecological toilet comprises a primary sedimentation tank, an anaerobic tank, an anoxic tank, an aerobic tank and a clean water tank, wherein the primary sedimentation tank is used for regulating water quantity and homogenizing water quality, an overflow weir is arranged in the primary sedimentation tank, sewage automatically flows into the anoxic tank through the overflow weir, the anaerobic tank utilizes anaerobic bacteria to ferment the sewage, the sewage treated by the anaerobic tank enters the anoxic tank through a pipeline, the anoxic tank is used for adsorbing suspended matters in the sewage, catching the suspended matters, flocculating and biologically degrading, the sewage treated by the anoxic tank enters the aerobic tank through a pipeline, the aerobic tank degrades and purifies organic matters in the sewage through aerobic organisms, and the sewage degraded and purified by the aerobic tank enters the clean water tank through a pipeline to be stored or discharged;

the aerobic tank comprises a tank body, a die carrier, a filtering membrane, a water distributor and a gas distribution system, wherein the die carrier and the water distributor are arranged in the tank body, the filtering membrane is arranged in the center of the tank body, and a biological membrane is arranged on the die carrier; the air distribution system comprises a fan and an aeration pipe, the aeration pipe is installed at the bottom of the pool body, and the aeration pipe is communicated with the air outlet end of the fan.

Furthermore, a reflux pump is arranged in the aerobic tank, a reflux pipe is connected to the water outlet end of the reflux pump, and the other end of the reflux pipe is placed in the primary sedimentation tank.

Furthermore, a grid is arranged in the primary sedimentation tank and used for intercepting large floating objects in sewage.

Furthermore, the anaerobic tank, the anoxic tank and the aerobic tank are all provided with flaky fillers.

Further, the biofilm is composed of zoogloea, filamentous fungi, protozoa and metazoan.

Preferably, the filtration membrane is an MBR membrane.

An ecological toilet sewage treatment process comprises the following treatment steps:

s1: precipitation and filtration: collecting waste water generated by the ecological toilet through a pipeline, flowing into a primary sedimentation tank, intercepting large floating objects in the waste water through a grid, and carrying out primary sedimentation and filtration;

s2: fermentation: anaerobic bacteria are utilized to carry out fermentation treatment in an anaerobic tank and an anoxic tank to remove solid matters and suspended matters in the wastewater;

s3: degradation and purification: in the aerobic tank, aerobic bacteria take flaky fillers as carriers to decompose organic matters in the sewage into inorganic salt.

Further, the step S2 includes one or more non-sequential processing steps of:

a: hydrolysis: solid substances in the sewage are degraded into soluble substances and macromolecular substances are degraded into micromolecular substances in an anaerobic tank through anaerobic bacteria;

b: adsorption: the sludge generated by fermentation treatment is used for adsorbing, capturing, bioflocculating and biodegrading suspended matters in the sewage;

c: removing ammonia nitrogen: the nitrifying liquid after the backflow in the anoxic tank is subjected to denitrification in the anoxic tank to remove ammonia nitrogen in the sewage.

The invention has the beneficial effects that: the invention adopts an anaerobic, anoxic and aerobic treatment system, has small volume of a specific activity sludge tank, strong adaptability to water quality, good impact resistance, stable effluent quality and no sludge expansion. The anaerobic and anoxic pond adopts the novel flaky filler, has larger surface area than other fillers, is convenient for microorganism film formation and demoulding, has higher removal rate of organic matters than other fillers under the same organic load condition, and can improve the solubility of oxygen in air in water. Because the biological contact oxidation pond is adopted in the biological treatment process, the volume load of the filler is lower, and the microorganism is in the self-oxidation stage, the sludge yield is less. Therefore, the invention has the advantages of high volume load, high biodegradation speed, small occupied area, low capital investment and operating cost and the like, is particularly suitable for treating small-sized wastewater, and has the advantages of low investment and high treatment efficiency.

Drawings

FIG. 1 is a block diagram of an eco-lavatory sewage treatment system according to the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a sewage treatment system for an ecological toilet comprises a primary sedimentation tank, an anaerobic tank, an anoxic tank, an aerobic tank and a clean water tank, wherein sewage generated by the ecological toilet is collected by a pipeline and then flows into the primary sedimentation tank; the primary sedimentation tank is used for regulating water quantity and homogenizing water quality, in the embodiment, in order to prevent floaters in the primary sedimentation tank from blocking a pipeline pump body and influencing a next treatment process, ensure normal operation of subsequent treatment structures and effectively reduce treatment load, and provide guarantee for long-term normal operation of a system, a grid is installed in the primary sedimentation tank and is used for intercepting large floaters in sewage. In this embodiment, the grid needs to be cleaned more than once a month to ensure that the non-disposable waste does not adversely affect the equipment.

Further, be equipped with the overflow weir in the preliminary sedimentation pond, sewage flows automatically through the overflow weir and enters into the oxygen deficiency pond, the anaerobism pond utilizes anaerobism bacterium to carry out fermentation treatment to sewage, through the mode of hydrolysising, degrades solid matter into soluble material to degrade macromolecular substance into micromolecular substance.

Further, the wastewater treated by the anaerobic tank enters the anoxic tank through a pipeline, and when the wastewater passes through a sludge layer formed by bacteria, the wastewater rises at a constant speed and keeps a certain anaerobic sludge concentration in the tank, and the sludge performs adsorption, net capture, biological flocculation and biodegradation on suspended matters, so that the wastewater is clarified while COD is degraded; meanwhile, the nitrified liquid after the backflow in the anoxic tank is subjected to denitrification in the anoxic tank, so that the removal rate of ammonia nitrogen in sewage is improved.

Furthermore, in order to improve the interception of fine suspended matters in the sewage, the anaerobic tank and the anoxic tank are both internally provided with flaky fillers.

Further, the wastewater treated by the anoxic tank enters an aerobic tank through a pipeline, the aerobic tank degrades and purifies organic matters in the wastewater through aerobic organisms, the aerobic tank comprises a tank body, a mold frame, a filtering membrane, a water distributor and an air distribution system, the mold frame and the water distributor are installed in the tank body, the filtering membrane is installed in the center of the tank body, and the filtering membrane is an MBR membrane; in this embodiment, the MBR membrane has characteristics of being not easily clogged, being easily cleaned, and the like. The MBR membrane can isolate pollutants in water efficiently, so that the quality of the effluent water is good. Meanwhile, the MBR membrane can also ensure stable water outlet and continuous flow.

The mold frame is provided with a biological film, the biological film consists of zoogloea, filamentous fungi, protozoa and metazoan, and the formation, growth, proliferation and shedding of the biological film are alternately carried out, so that the stable processing capacity is ensured.

The air distribution system comprises a fan and an aeration pipe, the aeration pipe is installed at the bottom of the pool body, the aeration pipe is communicated with the air outlet end of the fan, the fan can provide oxygen for the survival of aerobic bacteria in the aerobic pool, and the stirring of air flow generated by the aeration pipe can accelerate the update of the biological membrane, so that the biological membrane always keeps higher activity, and the blockage phenomenon can be prevented. In the embodiment, the microporous aeration pipe is adopted, the dissolved oxygen transfer rate of the microporous aeration pipe is higher than that of other aerators, and the microporous aeration pipe has the biggest characteristics of no aging, light weight, long service life, corrosion resistance, difficult blockage and the like.

Furthermore, in order to accelerate degradation and purification of most organic matters in the sewage in the aerobic tank, the aerobic tank is internally provided with a flaky filler, aerobic bacteria take the filler as a carrier and use the organic matters in the sewage as foodstuff to decompose the organic matters in the sewage into inorganic salts, so that the purification purpose is achieved.

Further, the wastewater after degradation and purification treatment in the aerobic tank enters a clean water tank through a pipeline for storage or discharge.

Further, in this embodiment, the size of the primary sedimentation tank, the size of the anaerobic tank, the size of the anoxic tank, the size of the aerobic tank, and the size of the clean water tank are all 500 × 400 × 1000 mm.

Further, the ecological toilet sewage treatment system also comprises a control system, wherein the control system comprises a PLC (programmable logic controller), a power supply module, a plurality of control valves, a reflux pump and a switch switching circuit, the power supply module provides working voltage for the control system, the control valves, the reflux pump and the switch switching circuit are all connected with IO (input/output) ports of the PLC, the control valves are arranged on pipelines among the anaerobic pool, the anoxic pool, the aerobic pool and the clean water pool, the switch switching circuit can perform automatic and manual conversion, and electrical equipment such as the control valves, the reflux pump and the like is set to run automatically or be controlled manually; all kinds of electrical equipment set up circuit short circuit and overload protection, set up the pilot lamp simultaneously, show each electrical equipment's operating condition.

Further, in this embodiment, an ecological toilet sewage treatment system adopts the following treatment processes:

s3: degradation and purification: in the aerobic tank, aerobic bacteria take filler as a carrier to decompose organic matters in the sewage into inorganic salt.

8. The ecological toilet sewage treatment process according to claim 7, wherein the process comprises the following steps: the step S2 includes one or more of the following non-sequential processing steps:

It should be noted that, for simplicity of description, the above embodiments of the processing steps are described as a series of acts, but those skilled in the art should understand that the present application is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.

Claims

1. The utility model provides an ecological lavatory sewage treatment system which characterized in that: the anaerobic tank is used for fermenting sewage by using anaerobic bacteria, the wastewater treated by the anaerobic tank enters the anoxic tank through a pipeline, the anoxic tank is used for adsorbing suspended matters in the sewage, performing net capture, biological flocculation and biodegradation, the wastewater treated by the anoxic tank enters the aerobic tank through the pipeline, the aerobic tank is used for degrading and purifying organic matters in the wastewater by using aerobic organisms, and the wastewater degraded and purified by the aerobic tank enters the clean water tank through the pipeline to be stored or discharged;

the aerobic tank comprises a tank body, a die carrier, a filtering membrane, a water distributor and a gas distribution system, wherein the die carrier and the water distributor are arranged in the tank body, the filtering membrane is arranged in the center of the tank body, and a biological membrane is arranged on the die carrier; the air distribution system comprises an aeration pipe, the aeration pipe is installed at the bottom of the pool body, and the aeration pipe is communicated with the air outlet end of the fan.

2. The ecological toilet sewage treatment system of claim 1, wherein: the aerobic tank is internally provided with a reflux pump, the water outlet end of the reflux pump is connected with a reflux pipe, and the other end of the reflux pipe is placed in the primary sedimentation tank.

3. The ecological toilet sewage treatment system of claim 1, wherein: and a grid is arranged in the primary sedimentation tank and used for intercepting floating objects in the sewage.

4. The ecological toilet sewage treatment system of claim 1, wherein: the anaerobic tank, the anoxic tank and the aerobic tank are all internally provided with flaky fillers.

5. The ecological toilet sewage treatment system of claim 1, wherein: the biofilm is composed of zoogloea, filamentous bacteria, fungi, protozoa and metazoan.

6. The ecological toilet sewage treatment system of claim 1, wherein: the filtering membrane is an MBR membrane.

7. The treatment process of the ecological toilet sewage treatment system according to any one of claims 1 to 6, wherein the treatment process comprises the following steps: the method comprises the following processing steps: