CN101786092A - Comprehensive treatment system for organic garbage and domestic sewage and comprehensive treatment method therefor - Google Patents

Abstract

The invention discloses a comprehensive treatment system and method for organic waste and domestic sewage, comprising an organic waste treatment device placed on the ground, a sewage purification device placed underground and a tail water land utilization unit, characterized in that the organic waste device is equipped with a At least one organic waste reaction tank, the upper part of the organic waste reaction tank is provided with a sewage spray pipe, the lower part of the organic waste reaction tank is provided with an overflow pipe, the overflow pipe is connected with the sewage purification device, the sewage purification device is provided with a sewage inlet, and the bottom is provided There is a tail water outlet connected to the perforated pipe set in the tail water land use unit and a return device connected to the sewage spray pipe, which mainly includes organic waste treatment steps, sewage purification treatment steps and tail water land utilization. The advantage is that the operation procedure is simplified, Reduce the investment and operating costs of facilities, improve the purification efficiency and utilization efficiency of pollutants in organic waste and domestic sewage, and realize the purpose of reusing water and fertilizer resources in organic waste and domestic sewage.

Description

A comprehensive treatment system and method for organic waste and domestic sewage

technical field

The invention relates to a comprehensive treatment system and method for organic garbage and domestic sewage, in particular to a comprehensive treatment system and method for organic garbage and domestic sewage suitable for rural residential areas and tourism service industries.

Background technique

With the sudden increase in the number of recreational facilities and tourists in scenic spots, the rapid development of catering services such as resorts and farmhouses, the amount of domestic garbage and sewage has increased significantly, and the pollution of rural residential areas and tourism service industries in urban water source protection areas has become increasingly serious. , Bringing huge pressure on the ecological environment of urban water source protection areas, leading to a decline in the quality of urban drinking water sources and affecting the health and quality of life of urban residents.

The existing treatment of organic waste and domestic sewage mainly includes the treatment of domestic waste and the purification of domestic sewage. The treatment of domestic waste mainly adopts the three methods of "village collection, town (township) transportation, and county (district) treatment". The first-level disposal mode is to centralize rural garbage for landfill and incineration treatment, or to conduct preliminary dry and wet sorting of domestic garbage, and to compost the organic components accounting for about 70-80% of the weight in the garbage on the spot, while the remaining About 20-30% of the inorganic components are treated centrally according to the three-level model; the purification of domestic sewage is mainly to build sewage collection pipe networks and sewage centralized purification facilities, and carry out agricultural irrigation or ecological utilization, among which sewage purification process includes unpowered Various methods such as the three-stage buried anaerobic biological device, the micro-dynamic hydrolysis tank-artificial wet sewage treatment process, and the dynamic contact oxidation sewage treatment process have solved the problem of rural residents in urban water source protection areas to a certain extent. Pollution from living sources in point and tourist service industries.

However, due to the fact that the living sources of pollutants in rural residential areas and tourism service industries have many points and areas, and small quantities and scattered characteristics, it is difficult to build pipe networks and collect sewage, and the investment cost of sewage treatment per unit is large, and the investment in tail water irrigation is large. The utilization has not achieved actual results; due to the large content of organic waste in the existing waste collection and treatment mode, there are problems such as heavy transportation and transit workload and high operating costs; since organic waste and domestic sewage are treated with different treatment facilities and different methods Disposal mode is inconvenient for management and maintenance, the problem of environmental pollution in rural areas and scenic spots has not been fundamentally resolved, and the water and fertilizer resources in organic waste and domestic sewage have not been fully utilized.

Contents of the invention

The technical problem to be solved by the present invention is to provide a comprehensive treatment system and method for organic waste and domestic sewage suitable for rural residential areas and tourist service industries with low investment cost, easy management and maintenance, and high utilization rate of resources.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is: a comprehensive treatment system for organic waste and domestic sewage, including an organic waste treatment device placed on the ground, a sewage purification device placed underground, and a tail water land utilization unit. The lower part of the organic waste treatment device is provided with at least one organic waste reaction tank, the upper part of the organic waste reaction tank is provided with a sewage spray pipe, the lower part of the organic waste reaction tank is provided with an overflow pipe, and the overflow The pipe is connected with the sewage purification device, the upper part of the sewage purification device is provided with a tail water outlet, and the bottom of the sewage purification device is provided with a backflow device, and the tail water outlet is connected with the tail water land utilization The perforated pipe provided in the unit is connected, and the return device is connected with the sewage spray pipe.

The organic waste treatment device adopts a sunny glass roof, the upper part of the organic waste reaction pool is provided with a waste inlet, and the lower part of the organic waste reaction pool is provided with a residue outlet.

An emptying pipe is provided at the bottom of the organic waste reaction tank, and an emptying valve is provided on the emptying pipe, and the emptying pipe is connected with the sewage purification device.

The sewage purification device is provided with a sewage inlet, and the interior of the sewage purification device is divided into an anoxic zone, an aerobic zone and a precipitation zone, and the anoxic zone, the aerobic zone and the precipitation zone are A flow channel is provided between them, biological fillers are provided in the anoxic zone and the aerobic zone, and the tail water outlet and the return device are in the sedimentation zone.

The aerobic zone is provided with a submerged aeration device.

The submerged aeration device includes an ejector and a first submersible sewage pump, the ejector is connected to the first submersible sewage pump, the air inlet of the first submersible sewage pump is connected to the The air outlets arranged on the upper part of the organic waste treatment device are connected.

The return device is a second submersible sewage pump or a manual hydraulic water pump.

The tailwater land use unit includes a horizontal ditch, a gravel layer is arranged in the horizontal ditch, the perforated pipe is located in the gravel layer, and the perforated pipe is provided with at least one hole on the surrounding wall. UPVC, PE or cast iron pipe, the diameter of the perforated pipe is 50-200mm, and the diameter of the hole is 20-30mm.

A comprehensive treatment method for organic waste and domestic sewage, comprising the following steps:

(1) Organic waste treatment: Pour the organic waste into the organic waste reaction tank in the organic waste treatment device and use a sewage spray pipe to spray and soak to produce waste retting liquid and inorganic residue containing soluble organic matter. The liquid flows to the sewage purification device through the overflow pipe, and the inorganic residue is periodically manually removed and taken out of the organic waste treatment device for landfill;

(2) Sewage purification treatment: the domestic sewage is transported into the sewage purification device through the sewage inlet, the domestic sewage is mixed with the garbage retting solution to carry out biological purification to obtain tail water, and a part of the tail water is It flows into the sewage spray pipe through the backflow device, and the other part flows out through the tail water outlet;

(3) Land use of tail water: the tail water flowing out of the tail water outlet enters the gravel layer of the horizontal ditch through the perforated pipe, and infiltrates into the surrounding soil.

Compared with the prior art, the present invention has the advantages that at least one organic waste reaction tank is provided at the bottom of the organic waste treatment device, and the bottom of the organic waste reaction tank is provided with an overflow pipe, and the overflow pipe is connected with the sewage purification device, and the sewage The bottom of the purification device is equipped with a tail water outlet and a return device. The tail water outlet is connected to the perforated pipe outside the sewage purification device, and the return device is connected to the sewage spray pipe. Therefore, after composting or retting the organic waste, the waste retting can be realized. Combined purification treatment of liquid and domestic sewage, recycling of tail water and land utilization, thereby simplifying operating procedures, reducing investment and operating costs of facilities, improving the purification efficiency and utilization efficiency of organic waste and domestic sewage, and improving the surrounding environmental sanitation , to achieve the purpose of reusing water and fertilizer (N, P) resources in organic waste and domestic sewage;

Since the organic waste treatment device adopts a sunny glass roof, the solar energy absorbed by the glass roof can be used to accelerate the aerobic/anaerobic decomposition of organic waste under the action of microorganisms; since there is an emptying pipe at the bottom of the organic waste reaction tank, and a There is an emptying valve, and the emptying pipe is connected with the sewage purification device. Therefore, when the external temperature is very low, the emptying valve can be opened, and all the sewage in the organic waste reaction tank will flow to the sewage purification device to prevent the sewage in the organic waste reaction tank from being discharged due to low temperature. freeze;

Since the interior of the sewage processor is divided into anoxic zone, aerobic zone and sedimentation zone with water channels between them, the deep purification treatment of sewage by anoxic microorganisms and aerobic microorganisms can be realized; There are biological fillers, which can increase the concentration of microorganisms in the pool and improve the efficiency of sewage purification; since the aerobic zone is equipped with a submerged aeration device, the air inlet of the first submersible sewage pump in the submerged aeration device and the organic waste treatment device The air outlets set on the upper part are connected, which is beneficial to generate a slight negative pressure in the organic waste treatment device during the operation of the submerged aeration device, and effectively eliminate the stench produced by the fermentation of waste.

Description of drawings

Fig. 1 is a flow chart of the comprehensive treatment process of organic waste and domestic sewage of the present invention.

Fig. 2 is a schematic diagram of the comprehensive treatment system for resort organic waste and domestic sewage according to the present invention.

Fig. 3 is a schematic diagram of a comprehensive treatment system for farmhouse organic waste and domestic sewage according to the present invention.

Fig. 4 is a top view of the sewage purification device of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment 1 Integrated treatment system and method for resort organic waste and domestic sewage

Take a forest tourism service facility construction project as an example, a resort with 100 resident staff and a maximum of 300 people in the tourist season.

The domestic waste of the resort is mainly kitchen waste, and the domestic waste is first classified into dry and wet according to the moisture content. Dry garbage is mainly packaging materials, which has a certain recycling value and is not easy to degrade. It can be entrusted to the local sanitation department for regular removal and disposal; wet garbage is mainly kitchen waste, accounting for about 70-80% of the total weight of garbage, which is very easy to Corruption and bad smell are organic wastes that need to be dealt with immediately.

As shown in Figures 2 and 4, the organic waste treatment device 1 adopts a sunny glass roof and is provided with two organic waste reaction pools 2 for alternate use. 100kg of organic waste is put into the organic waste reaction pool with a volume of 4m3 from the waste inlet ³ In 2, the organic waste is intermittently sprayed and soaked for a long time through the sewage spray pipe 4, and the organic matter is decomposed and stabilized by microorganisms. The residence time of the organic waste in the organic waste reaction tank 2 is 30-60 days, and the organic matter dissolves into the The rubbish retting liquid produced in the spray liquid and landfill leachate utilizes the effect of gravity to flow from the overflow pipe 5 to the sewage purification device 7 through the first pipeline 6, and the inorganic residues produced are regularly cleared through the residue outlet 8 and then landfilled. Wherein the bottom of the organic waste reaction tank 2 is provided with an emptying pipe 9, and the emptying pipe 9 is provided with an emptying valve, and the emptying pipe 9 is connected with the sewage purification device 7 through the first pipeline 6 to prevent the reaction of the organic waste caused by the low temperature Freezing of the pool.

The sewage generated by the resort is designed to be 10.0m ³ /d, and the domestic sewage is preliminarily treated through septic tanks and grease traps, and then imported into the sewage purification device with a total effective volume of 30m ³ and an area of about 10m ² through the sewage inlet 10 7. After mixing with the garbage retting solution, first pass through the anoxic zone 11, remove particle pollutants through precipitation, and hydrolyze macromolecular pollutants into small molecules that are easily degraded by microorganisms;

Then the domestic sewage enters the aerobic zone 13 through the water channel 12, wherein the anoxic zone 11 and the aerobic zone 13 are provided with biological fillers for improving the biological purification efficiency, and the aerobic zone 13 is provided with a jet device 14 and a first submerged tank. The submerged aeration device composed of the sewage pump 15 aerates and oxygenates the sewage in the aerobic zone to ensure that the sewage in the sewage purification device 7 is in an aerobic state. While COD is degraded, ammonia nitrogen is oxidized to nitrate, The air inlet of the first submersible sewage pump 15 is connected with the air outlet 17 provided on the top of the machine waste treatment device 1 through the third pipeline 16, and the odor produced in the machine waste treatment device 1 is sucked into the sewage purification device 7 together with the air , and dissolved into domestic sewage;

Finally, the domestic sewage enters the sedimentation area 18 through the flow channel 12, and the sludge in the sewage is deposited to obtain the tail water. The second submersible sewage pump 19 is installed in the sedimentation area 18 and connected with the sewage spray pipe 4 through the second pipeline 20, and partly The tail water is returned to the organic waste treatment device 1 for intermittent spraying and long-term soaking of the organic waste, and the other part of the tail water passes through the tail water outlet 21 and the tail water land use unit is provided with a UPVC perforated pipe 22 with a diameter of 20 mm connected, enter the gravel layer laid with non-woven fabric in the horizontal ditch, and infiltrate into the surrounding soil, wherein the residence time of domestic sewage in the sewage purification device 7 is 24 hours.

After the sewage tail water is distributed to the gravel horizontal ditch in the tail water land use unit, the organic pollutants in it are further purified and removed through a series of actions such as soil physical retention, chemical adsorption, microbial decomposition, and plant absorption.

Embodiment 2 The comprehensive treatment system and method of farmhouse organic waste and domestic sewage

Take a farmer's residence for leisure tourism and catering services in a certain place, with 2-3 permanent staff, and a farmer's residence that serves at most 10-20 tourists during the peak tourist season.

Domestic waste generated by farmhouse leisure tourism and catering services is mainly kitchen waste. Dry garbage mainly consists of packaging materials and other wastes, which have a certain recycling value and are not easy to degrade. Corruption and bad smell are organic wastes that need to be dealt with immediately.

As shown in Figures 3 and 4, the organic waste treatment device 1 adopts a sunny glass roof and is provided with two organic waste reaction pools 2 for alternate use. 10kg of organic waste is put into the organic waste reaction pool with a volume of 1m3 from the waste inlet ³ In 2, the organic waste is intermittently sprayed and soaked for a long time through the sewage spray pipe 4, and the organic matter is decomposed and stabilized by microorganisms. The residence time of the organic waste in the organic waste reaction tank 2 is 30-60 days, and the organic matter dissolves into the The rubbish retting liquid produced in the spray liquid and landfill leachate utilizes the effect of gravity to flow from the overflow pipe 5 to the sewage purification device 7 through the first pipeline 6, and the inorganic residues produced are regularly cleared through the residue outlet 8 and then landfilled. Wherein the bottom of the organic waste reaction tank 2 is provided with an emptying pipe 9, and the emptying pipe 9 is provided with an emptying valve, and the emptying pipe 9 is connected with the sewage purification device 7 through the first pipeline 6 to prevent the reaction of the organic waste caused by the low temperature Freezing of the pool.

The sewage generated by the farmhouse is designed according to 1.0m ³ /d, and the domestic sewage is initially treated through septic tanks and grease traps, and then imported into the sewage purification device with a total effective volume of 6m ³ and an area of about 3m ² through the sewage inlet 10 7. After mixing with the garbage retting solution, it first passes through the anoxic zone 11, removes particulate pollutants through precipitation, and hydrolyzes macromolecular pollutants into small molecules that are easily degraded by microorganisms; In the zone 13, the anoxic zone 11 and the aerobic zone 13 are equipped with biological fillers to improve the efficiency of biological purification; finally enter the sedimentation zone 18, the sludge in the sewage is precipitated to obtain tail water, and the sedimentation zone 18 is equipped with manpower The pressure water pump 23 is connected to the sewage spray pipe 4 through the second pipeline 20, and returns part of the tail water to the organic waste treatment device 1 for intermittent spraying and long-term soaking of the organic waste, and the other part of the tail water passes through the tail water outlet 21 is connected with the perforated pipe 22, which is made of cast iron pipe with a diameter of 30 mm, and enters the gravel layer laid with non-woven fabric in the horizontal ditch, and infiltrates into the surrounding soil, wherein the domestic sewage is in the sewage The residence time in the purification unit 7 was 24 hours.

After the sewage tail water is distributed to the gravel horizontal ditch in the tail water land use unit, the organic pollutants in it are further purified and removed through a series of actions such as soil physical retention, chemical adsorption, microbial decomposition, and plant absorption.

Claims (9)

1. the total system of organic waste and sanitary sewage, comprise and place organic waste treating apparatus on the ground, place underground effluent treatment plant and tail water soil to utilize the unit, it is characterized in that: described organic waste treating apparatus bottom is provided with at least one organic waste reaction tank, described organic waste reaction tank top is provided with the sewage shower, described organic waste reaction tank bottom is provided with overflow pipe, described overflow pipe is connected with described effluent treatment plant, described effluent treatment plant top is provided with tailrace outlet, described effluent treatment plant bottom is provided with reflux, described tailrace outlet links to each other with the perforated pipe that described tail water soil utilizes the unit to be provided with, and described reflux is connected with described sewage shower.

2. the total system of a kind of organic waste according to claim 1 and sanitary sewage, it is characterized in that: described organic waste treating apparatus adopts the glass roof of Chaoyang, described organic waste reaction tank top is provided with the rubbish import, and described organic waste reaction tank bottom is provided with the residue outlet.

3. the total system of a kind of organic waste according to claim 1 and sanitary sewage, it is characterized in that: described organic waste reaction tank bottom is provided with evacuated tube, described evacuated tube is provided with exhaust-valve, and described evacuated tube is connected with described effluent treatment plant.

4. the total system of a kind of organic waste according to claim 1 and sanitary sewage, it is characterized in that: described effluent treatment plant is provided with the sewage import, described effluent treatment plant inside is separated into anoxic zone, aerobic zone and settling zone, be provided with the flowing water passage between described anoxic zone, described aerobic zone and the described settling zone, be provided with biologic packing material in described anoxic zone and the described aerobic zone, described tailrace outlet and described reflux are in the described settling zone.

5. the total system of a kind of organic waste according to claim 4 and sanitary sewage is characterized in that: be provided with aerator under the liquid in the described aerobic zone.

6. the total system of a kind of organic waste according to claim 5 and sanitary sewage, it is characterized in that: aerator comprises the ejector and first submersible sewage pump under the described liquid, described ejector is connected with described first submersible sewage pump, and the air inlet of described first submersible sewage pump is connected with the gas outlet that described organic waste treating apparatus top is provided with.

7. the total system of a kind of organic waste according to claim 1 and sanitary sewage is characterized in that: described reflux is second submersible sewage pump or manpower water pump.

8. the total system of a kind of organic waste according to claim 1 and sanitary sewage, it is characterized in that: described tail water soil utilizes the unit to comprise horizontal ditch, be provided with gravel layer in the described horizontal ditch, described perforated pipe is arranged in described gravel layer, described perforated pipe is UPVC, PE or the cast iron pipe that perisporium is provided with at least one hole, the diameter of described perforated pipe is 50-200mm, and the diameter in described hole is 20-30mm.

9. the integrated conduct method of organic waste and sanitary sewage is characterized in that may further comprise the steps:

(1) organic waste is handled: organic waste is poured in the organic waste reaction tank in the organic waste treating apparatus adopted the sewage shower to spray immersion, generation contains the rubbish of SOM and macerates liquid and inorganic residues, described rubbish is macerated liquid and is flowed to effluent treatment plant by overflow pipe, and described inorganic residues is regularly manually drawn out the organic waste treating apparatus clearly and carried out landfill;

(2) sewage purification is handled: sanitary sewage is delivered into described effluent treatment plant by the sewage import, carry out biological cleaning after described sanitary sewage and described rubbish are macerated liquid and mixed and obtain tail water, a described tail water part is flowed into the sewage shower by reflux, and another part flows out by tailrace outlet;

(3) the tail water soil utilizes: the tail water that will flow out tailrace outlet enters in the gravel layer of horizontal ditch by perforated pipe, in the soil around penetrating into.

Images