CN209226783U - A kind of integrated rural sewage-treatment plant - Google Patents

Abstract

The utility model discloses a kind of integrated rural sewage-treatment plants, it is desirable to provide a kind of countryside sewage treatment equipment of strong applicability.It includes basket grid, blender, intake pump, air lift system, regulatory region, anoxic zone, the first area SND, the 2nd area SND, the area Xiao Yang, settling zone and the continuous flow sand filter that continuous flow sand-washing device is arranged inside；It is characterized by: the intake pump is connect by water inlet pipe with regulatory region, the basket grid is set to the outlet end of water inlet pipe；The blender is set in anoxic zone；First area SND bottom is provided with the first micro-hole aerator, first circulation air stripper of the setting for muddy water circulation in the first area SND；2nd area SND bottom is provided with the second micro-hole aerator, second circulation air stripper of the setting for muddy water circulation in the 2nd area SND；The lower part of the regulatory region is connected to anoxic zone top；The anoxic zone top is connected to the first area SND lower part；First area SND is connected to the 2nd area SND by grid.

Description

An integrated rural sewage treatment device

technical field

The utility model relates to the technical field of sewage treatment equipment, in particular to an integrated rural sewage treatment device.

Background technique

With the continuous development of society, the problem of water pollution has gradually shifted from urban to rural areas. At present, rural sewage is basically discharged directly without treatment, which has seriously affected the rural ecological environment and directly threatened the rural masses. As a result, sewage treatment has gradually developed from urban to rural areas.

Rural sewage mainly has the characteristics of scattered water quantity, unstable water quantity and diversified water quality, which brings certain difficulties to the design of sewage treatment system. Moreover, the existing sewage treatment equipment is not easy to maintain, and cannot meet the treatment of sewage with different water quality, and it is difficult to guarantee the operation stability and effluent water quality.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an integrated rural sewage treatment device that is easy to maintain, stable in operation and applicable to various water qualities.

In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

An integrated rural sewage treatment device, including basket grille, agitator, water inlet pump, air lift system, adjustment area, anoxic area, first SND area, second SND area, oxygen elimination area, sedimentation area and its internal A continuous flow sand filter equipped with a continuous flow sand washer; the water inlet pump is connected to the regulating area through a water inlet pipe, and the basket grille is arranged at the outlet end of the water inlet pipe; the mixer is arranged in an anoxic area; the The bottom of the first SND area is provided with a first microporous aerator, and the first circulating air stripper for sludge water circulation is arranged in the first SND area; the bottom of the second SND area is provided with a second microporous aerator In the second SND zone, a second circulating air stripper for muddy water circulation is set; the lower part of the adjustment zone communicates with the upper part of the anoxic zone; the upper part of the anoxic zone communicates with the lower part of the first SND zone; the The first SND area is communicated with the second SND area with a grid; the second SND area is communicated with the oxygen removal area with a grid; the upper part of the oxygen elimination area is communicated with the precipitation area; the precipitation The zone is connected with the continuous quicksand filter through the overflow weir; the upper part of the continuous quicksand filter is provided with a drainage pipe; the regulation zone is respectively connected with the first SND zone and the second SND zone through the outlet pipe; The liquid return pipe is communicated with the anoxic zone; the bottom of the settling zone is communicated with the anoxic zone through the activated sludge return pipe; the anoxic zone, the first SND zone, the second SND zone, the oxygen elimination zone, the sedimentation zone and The bottom of the continuous quicksand filter is equipped with a sewage pipe; the air lift system is respectively connected with the first microporous aerator, the first circulating air lifter, the second microporous aerator, and the second circulating air lifter through the pipeline. , nitrifying liquid return pipe, activated sludge return pipe and continuous sand filter connection in the continuous flow sand filter tank.

Preferably, it also includes a grit chamber; the sand washing water discharge pipe of the continuous flow sand filter is connected to the grit chamber.

Compared with the prior art, the utility model has the following advantages:

The utility model is provided with an oxygen-removing zone to consume too much dissolved oxygen in the second SND zone, so as to ensure that the reflux liquid of the nitrifying liquid does not affect the denitrification in the anoxic zone.

In order to further remove tiny particles in the effluent, the utility model designs a continuous flow sand filter behind the sedimentation area, which can realize cleaning of gravel while filtering the effluent. Ensure that the effluent water quality is stable and up to standard while reducing the workload of sand replacement.

The utility model is an integrated device, and the transportation and installation are relatively simple. Considering the problem of difficult maintenance in rural areas, the instruments and equipment used are relatively simple and common instruments and equipment, which are simple to use and easy to operate and easy to replace. The utility model has the advantages of flexibility, simplicity, high efficiency and stability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is the structural representation of the utility model.

In the figure: Basket grid 1, agitator 2, water inlet pump 3, air lift system 4, conditioning area 5, anoxic area 6, first SND area 7, second SND area 8, oxygen elimination area 9, precipitation area 10 , Continuous flow sand washing device 11, continuous flow sand filter 12, water inlet pipe 13, first microporous aerator 14, first circulating air stripper 15, second microporous aerator 16, second circulating air stripper 17. Overflow weir 18, drainage pipe 19, outlet pipe 20, nitrifying liquid return pipe 21, activated sludge return pipe 22, grit chamber 23, sewage pipe 24.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. In the following description, in order to clearly demonstrate the structure and working method of the utility model, the accompanying drawings will be used as the basis to describe with the help of many directional words, but "front", "rear", "left" and "right" should be used , "上", "下" and other words are understood as convenient terms, and should not be understood as limiting words.

The integrated rural sewage treatment device shown in Figure 1 includes a basket grille, agitator, water inlet pump, air lift system, conditioning area, anoxic area, the first SND area (the first synchronous nitrification and denitrification area), the second The SND area (the second synchronous nitrification and denitrification area), the deoxidation area, the sedimentation area, and the continuous flow sand filter with a continuous flow sand washing device inside; the water inlet pump is connected to the regulation area through the water inlet pipe, and the basket grid The grid is set at the outlet end of the water inlet pipe; the mixer is set in the anoxic zone; the first microporous aerator is set at the bottom of the first SND zone, and the first microporous aerator is set in the first SND zone for mud water circulation. A circulating air stripper; the bottom of the second SND area is provided with a second microporous aerator, and the second circulating air stripper for muddy water circulation is arranged in the second SND area; the bottom of the adjustment area is connected with the The upper part of the anoxic zone is communicated; the upper part of the anoxic zone is communicated with the lower part of the first SND zone; the first SND zone and the second SND zone are communicated with a grid; It is connected with a grid; the upper part of the oxygen elimination zone is connected with the sedimentation zone; the sedimentation zone is connected with the continuous quicksand filter through the overflow weir; the upper part of the continuous quicksand filter is provided with a drainage pipe; The water pipes are respectively communicated with the first SND area and the second SND area; the deaeration area is communicated with the anoxic area through the nitrification liquid return pipe; the bottom of the sedimentation area is communicated with the anoxic area through the activated sludge return pipe; the The bottom of the anoxic zone, the first SND zone, the second SND zone, the aerobic zone, the sedimentation zone and the continuous sand filter are all provided with sewage pipes (only the sewage pipes on the sedimentation zone are shown in the figure); The extraction system is respectively connected with the first microporous aerator, the first circulating air stripper, the second microporous aerator, the second circulating air stripper, the nitrification liquid return pipe, the activated sludge return pipe and the continuous flow sand filter through the pipeline. Continuous sand filter connection in pool.

It also includes a grit chamber; the sand washing water discharge pipe of the continuous flow sand filter is connected with the grit chamber.

The adjustment area and the basket grille are aimed at the unstable characteristics of rural sewage water quality and water volume. The purpose is to adjust the water quality and water volume of the incoming water. At the same time, the basket grille is used to remove impurities in the incoming water to ensure the stability of the subsequent treatment system and equipment. run.

The main function of the anoxic zone is to use the carbon source in the influent to remove the nitrate nitrogen in the nitrification reflux liquid through denitrification to achieve the purpose of strengthening denitrification. At the same time, other pollutants in the influent are degraded.

The first SND zone and the second SND zone make the pollutants such as ammonia nitrogen and COD in the influent oxidized as much as possible into nitrate nitrogen and carbon dioxide.

The purpose of the oxygen elimination zone is to prevent excessive dissolved oxygen in the second SND zone from returning to the anoxic zone, consuming the limited carbon source in the influent and affecting the living environment of denitrifying bacteria, and inhibiting the denitrification effect.

The sedimentation zone separates the mud-water mixture from the deaeration zone, and at the same time, the sludge flows back to the anoxic zone through the air lift of the activated sludge return pipe to maintain the microbial biomass of the whole system.

When working, the sewage is lifted to the water inlet pipe by the water inlet pump, and then filtered through the basket grille and then enters the adjustment area. After the water quality and water volume are mixed and adjusted through the adjustment area, part of the water enters the anoxic area, and the other part passes through the outlet pipe separately. Enter the first SND area and the second SND area. In order to prevent the suspended material in the first SND area and the second SND area from entering the adjustment area or blocking the pipe through the outlet pipe, a grid with a diameter of 10mm can be installed at the inlet of the outlet pipe and the first SND area and the second SND area respectively. intercept.

In the anoxic zone, the sewage, the reflux liquid of the nitrifying liquid and the activated sludge are mixed evenly by the agitator, and the carbon source in the influent is used to denitrify the nitrate nitrogen in the nitrifying liquid through microbial degradation, and the nitrate nitrogen in the sewage is removed. Nitrogen, while removing other pollutants in the influent.

In the first SND area and the second SND area, the first microporous aerator, the second microporous aerator, the first circulating air stripper and the second circulating air stripper are operated intermittently and gradient aeration , to realize the operation of different dissolved oxygen concentrations in the first circulation stripper and the second circulation stripper. When in use, the intermittent cycle operation of the first SND zone and the second SND zone is realized through the linkage of the time relay and the solenoid valve. When the first microporous aerator and the second microporous aerator were oxygenated, the first circulation stripper and the second circulation stripper stopped; when the first microporous aerator and the second microporous aerator When the tank is stopped during oxygenation, the first circulation air stripper and the second circulation air stripper will lift up the mud-water mixture at the bottom of the first SND area and the second SND area, and send the mud-water mixture at the bottom of the pool to the first SND area and the upper part of the second SND area, realize the upper and lower flow circulation in the pool body, ensure the full mixing of muddy water in the first SND area and the second SND area, and consume the dissolved oxygen concentration in the first SND area and the second SND area to achieve hypoxia surroundings. Through the intermittent cycle operation of the first microporous aerator, the second microporous aerator, the first circulation stripper and the second circulation stripper, the aerobic environment and anoxic environment in the first SND area and the second SND area are realized The switching of the environment achieves the purpose of synchronous nitrification and denitrification in the first SND area and the second SND area. At the same time, the carbon source discharged into the sewage by the outlet pipe is used to strengthen denitrification and denitrification again. At the same time, the action of microorganisms in different layers of the biofilm is used to realize simultaneous nitrification and denitrification.

Sewage in turn passes through the first SND zone and the second SND zone to react and then enters the deaeration zone. Part of the sewage in the deaeration zone enters the sedimentation zone, and part of it returns to the anoxic zone through the nitrifying liquid return pipe after passing through the deoxidation effect of the deaeration zone. In order to prevent the suspended filler in the second SND zone from entering the deoxidation zone, a grid with a diameter of 10mm can be set at the outlet of the nitrifying liquid return pipe to intercept it.

The sedimentation area separates mud and water through physical settlement, and part of the sludge at the bottom flows back to the anoxic zone through the activated sludge return pipe to ensure the concentration of the activated sludge in the entire system, and the other part of the sludge returns to the water storage irregularly through the sewage pipe pool (there is a reservoir outside the sewage treatment plant). The part of the sludge that returns to the reservoir is reduced by the anaerobic digestion of the reservoir, and at the same time, a certain carbon source is released, which is beneficial to the operation of the subsequent system. The supernatant in the sedimentation area enters the continuous quicksand filter through the overflow weir, and the continuous quicksand filter filters the sewage and discharges it. The continuous flow sand washing device pumps the dirty sand filtered at the bottom of the continuous flow sand filter to the sand washing tank for cleaning by means of air lift. After cleaning, it returns to the self-washing sand filter by gravity to clean the gravel. The sand washing water enters the grit chamber through the sand washing water discharge pipe, and after sedimentation, the sand washing water can be returned to the conditioning area by air lift for further treatment. This ensures that the water output of the system is stable up to the GB18918-2002 Grade A standard, while reducing the manual replacement of gravel.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (2)

1. a kind of integrated rural sewage-treatment plant, including basket grid, blender, intake pump, air lift system, regulatory region, Anoxic zone, the first area SND, the 2nd area SND, the area Xiao Yang, settling zone and the continuous flow sand filtration that continuous flow sand-washing device is arranged inside Pond；It is characterized by: the intake pump is connect by water inlet pipe with regulatory region, the basket grid is set to the outlet of water inlet pipe End；The blender is set in anoxic zone；First area SND bottom is provided with the first micro-hole aerator, the first SND First circulation air stripper of the setting for muddy water circulation in area；2nd area SND bottom is provided with the second micro-hole aerator, institute State second circulation air stripper of the setting for muddy water circulation in the 2nd area SND；The lower part and anoxic zone top of the regulatory region connect It is logical；The anoxic zone top is connected to the first area SND lower part；It is connected between first area SND and the 2nd area SND with grid； It is connected between 2nd area SND and the area Xiao Yang with grid；Top is connected between the area Xiao Yang and settling zone；The settling zone It is connected to by overflow weir with continuous flow sand filter；Drainpipe is arranged in continuous flow sand filter top；The regulatory region is by going out Water pipe is connected to the first area SND and the 2nd area SND respectively；The area Xiao Yang is connected to by nitrification liquid return pipe with anoxic zone；Institute The bottom for stating settling zone is connected to by activity sludge reflux pipe with anoxic zone；The anoxic zone, the first area SND, the 2nd area SND, The bottom in the area Xiao Yang, settling zone and continuous flow sand filter is provided with sewage pipe；The air lift system is by pipeline respectively with the One micro-hole aerator, first circulation air stripper, the second micro-hole aerator, second circulation air stripper, nitrification liquid return pipe, activity are dirty Continuous sand filter connection in mud return pipe and continuous flow sand filter.

2. integrated rural sewage-treatment plant according to claim 1, it is characterised in that: it further includes setting pot；It is described The washed-out sand water discharge spout of continuous flow sand filter is connect with setting pot.