CN104140166A - Seasonal High Turbidity Raw Water Treatment Process - Google Patents

Abstract

The invention discloses a seasonal high turbid raw water treatment process, which comprises the steps of feeding raw water into a pre-precipitation concentration recycling tank for pre-precipitation, feeding effluent into a sedimentation tank for precipitation, feeding the precipitated effluent into a filter tank for filtration, feeding the effluent into a clean water tank for regulation and storage, then feeding the effluent into a municipal pipe network by a secondary pump room under pressure, feeding sludge discharged from the pre-precipitation concentration recycling tank into a balance tank for storage, feeding the discharged sludge into a dehydration machine room for dehydration treatment, removing dry sludge for outward transportation and disposal, and discharging filtrate into a concentrated mass energy conversion tank. The process can adapt to different raw water conditions and operation requirements, combines a sludge discharge water treatment process with a water purification process, adapts to seasonal high-turbidity and ordinary low-turbidity working conditions, performs secondary treatment on supernatant liquid of a concentration tank and dehydration filtrate which are easy to exceed standard in a production wastewater concentration and dehydration process by using a concentration mass energy conversion tank, efficiently utilizes the treatment capacity of structures to save floor area, and realizes the effects of standard discharge of water discharged from the water purification process and conversion of organic matters in the production wastewater into biological energy for further recovery.

Description

Seasonal High Turbidity Raw Water Treatment Process

technical field

The invention relates to a treatment process for dealing with seasonal high turbidity raw water involved in water supply and drainage projects, in particular a combined treatment process applied to a waterworks for taking seasonal high turbidity raw water. For the high turbidity raw water that occurs seasonally, the raw water pre-sedimentation and sludge concentration treatment are combined to achieve the quality of the effluent water from the water plant under different working conditions of high and low turbidity of the raw water, and at the same time realize the concentration, dehydration and quality of the production sludge. Transformable optimized combined treatment process.

Background technique

The influent water of urban waterworks contains a variety of organic and inorganic substances. Surface water sources are susceptible to changes in flow and water temperature during seasonal changes, resulting in a sharp increase in short-term turbidity. The treatment process of the waterworks cannot cope with it and produces a large amount of Production wastewater is discharged from the process as a by-product of production, which puts a lot of pressure on the surrounding environment and becomes an environmental and social problem that urban waterworks must solve.

At present, waterworks that use high-turbidity raw water generally adopt a simple pre-sedimentation process to deal with seasonal high-turbidity water quality before conventional sedimentation and filtration treatment, while sludge impurities contained in production wastewater are often treated as pollution sources. Through concentration, natural drying or mechanical dehydration, the production sludge contained in the production wastewater is transported in the form of dry solids to reduce the impact on the environment. The main disadvantage of the above-mentioned technology is that when the raw water of the waterworks shows continuous low turbidity after the high turbidity water passes, the pre-sedimentation process cannot play a role in the treatment process, and the discharge time of production wastewater is generally concentrated, and the treatment structure occupies a relatively small area. Large, high operating costs, concentrated supernatant and dehydrated filtrate are often difficult to meet the discharge standards, a large amount of organic matter as pollutants has become an environmental burden again, and has become a technical problem in the treatment of seasonal high turbidity raw water.

Contents of the invention

The purpose of the present invention is to provide a seasonal high turbidity raw water treatment process, which is suitable for the combined treatment process under the condition of seasonal high turbidity raw water, overcomes the traditional technical prejudice of separate treatment of water and sludge, and combines pre-sedimentation treatment, sedimentation filtration , Sludge concentration and dehydration are combined with wastewater recovery and mass-energy conversion functions. While ensuring that the effluent quality of the treatment process reaches the standard, it can realize the concentration and dehydration of the production sludge water, the discharge of the tail water of the sludge treatment, and the conversion of organic matter into bio-energy for further recovery. function.

In order to achieve the above object, the technical solution of the present invention is: a seasonal high turbidity raw water treatment process, which is characterized in that the raw water first enters the pre-sedimentation concentration reuse tank for pre-settling, the effluent enters the sedimentation tank for precipitation, and the effluent of the precipitation enters the filter tank for filtration Finally, after the effluent enters the clear water tank for adjustment and storage, it is sent to the municipal pipe network by the secondary pump room under pressure, and the sludge discharged from the pre-sedimentation concentration reuse tank is connected to the balance tank for storage, and the effluent enters the dehydration machine room for dehydration treatment, and the dry The mud is transported outside for disposal, and the filtrate is discharged into the concentrated mass-energy conversion tank.

According to an embodiment of the present invention, when the site of the water plant is tight and the construction funds are relatively abundant, the sedimentation process can consider adopting a high-efficiency sedimentation tank with a small footprint and functions of sludge return and concentration. The sludge from the sedimentation and concentration reuse tank is adjusted and stored in the balance tank and then enters the dehydration machine room for dehydration treatment.

According to another embodiment of the present invention, when the land of the water plant is relatively abundant and the construction funds are relatively tight, the sedimentation process can consider adopting an advection sedimentation tank or an inclined tube sedimentation tank with a large floor area, an advection sedimentation tank or an inclined tube sedimentation tank After the sludge is connected to the sludge discharge tank, it is lifted into the concentration tank for concentration. The supernatant of the concentration tank is discharged into the concentration mass-energy conversion tank. Perform dehydration.

After the filter tank flushing wastewater is discharged into the drainage tank, it is generally raised and mixed with raw water for reuse, and discharged into the concentrated mass-energy conversion tank under emergency conditions. The concentrated mass-energy conversion tank receives the filtrate from the dehydration machine room and the emergency drainage of the drainage tank for further treatment, and part of the organic matter is converted into bioenergy for recovery, and the remaining sludge is treated with sludge drying; the filtrate from the concentrated mass-energy conversion tank can be discharged into the drainage tank After upgrading, it can be used as raw water, or discharged into the river water body up to the standard. When the raw water turbidity is lower than 200NTU or the sediment content is lower than 0.20 kg/m ³ in normal low turbidity conditions, the raw water can go beyond the pre-sedimentation concentration reuse tank and directly enter the sedimentation tank for treatment; when the raw water turbidity exceeds 200NTU or the sediment content When the raw water is 0.20~3.5kg/ ^m3 , the raw water should be pre-sedimented in the pre-sedimentation concentration reuse tank before entering the sedimentation tank for treatment; when the sand content of the raw water exceeds 3.5kg/ ^m3 , the raw water should firstly It enters the grit chamber for grit, and the effluent passes through the pre-sedimentation concentration reuse pond and enters the sedimentation tank for treatment. Add potassium permanganate before the sand discharge tank and pre-sedimentation concentration reuse tank, add PAM before the sand discharge tank and pre-sedimentation concentration recovery tank and in the high-efficiency sedimentation tank, add alum before the high-efficiency sedimentation tank, and add potassium permanganate before and after the clear water tank Chlorine, add powdered carbon after the grit chamber.

The present invention combines the functions of sand settling treatment, sedimentation filtration, sludge concentration and dehydration with waste water recovery and mass-energy conversion, and firstly combines the reuse treatment and pre-sedimentation of production waste water, and sets it before the sedimentation tank as the water purification process. Part of it, and the supernatant and dehydration filtrate produced in wastewater treatment are converted into mass and energy, and part of the organic matter is converted into bioenergy. The present invention classifies the treatment processes according to the different precipitation methods adopted by the treatment processes, and then forms a complete treatment system composed of two sets of treatment processes according to different operating conditions and requirements. The advantage of this process is that it can adapt to different raw water conditions and operating requirements. It combines the sludge treatment process and water purification process together. It also adapts to seasonal high turbidity and normal low turbidity conditions. The supernatant of the concentration tank and the dehydration filtrate that are easy to discharge beyond the standard are used for secondary treatment in the concentrated mass-energy conversion tank, which efficiently utilizes the treatment capacity of the structure to save the floor area, realizes the discharge of the effluent of the water purification process and the conversion of organic matter in the production wastewater into bioenergy. The role of recycling.

Description of drawings

Fig. 1 is a schematic diagram of the present invention for treating seasonal high turbidity water in high-efficiency sedimentation tanks.

Fig. 2 is a schematic diagram of a treatment process for seasonal high turbidity water by using an advection sedimentation tank or an inclined tube sedimentation tank.

Fig. 3 is a schematic diagram of the structure of the pre-sedimentation concentration recycling tank.

FIG. 4 is a cross-sectional view along line A-A of FIG. 3 .

Fig. 5 is the B-B sectional view of Fig. 3.

Fig. 6 is a schematic diagram of the plane layout of the adjustable perforated outlet tank.

Fig. 7 is a schematic diagram of the side layout of the adjustable perforated outlet tank.

Fig. 8 is a sectional view of the adjustable perforated water outlet along line C-C in Fig. 7 .

Fig. 9 is a sectional view of the adjustable perforated water outlet along line D-D in Fig. 7 .

Fig. 10 is a schematic diagram of the layout of the outlet groove of the adjustable toothed weir plate.

Fig. 11 is a detailed view of the toothed weir plate of the adjustable toothed weir plate outlet trough.

Fig. 12 is a detailed view of the weir plate gasket of the adjustable toothed weir plate outlet trough.

Detailed ways

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

The present invention is a seasonal high turbidity water treatment process. First, according to the conditions of water plant land and funds, the treatment process is divided into high-efficiency sedimentation tanks for seasonal high turbidity water treatment processes and advection sedimentation tanks or inclined tube sedimentation tanks. There are two types of seasonal high turbidity water treatment processes. When the site of the water plant is tight and the construction funds are relatively abundant, the sedimentation process can consider adopting a high-efficiency sedimentation tank with a small footprint and the function of sludge return and concentration; when the land for the water plant is relatively abundant and the construction funds are relatively tight, the sedimentation process can be considered Use advection sedimentation tanks or inclined tube sedimentation tanks that occupy a large area. When the raw water turbidity is lower than 200NTU or the sediment content is lower than 0.20 kg/m ³ in normal low turbidity conditions, the raw water can go beyond the pre-sedimentation concentration reuse tank and directly enter the sedimentation tank for treatment; when the raw water turbidity exceeds 200NTU or the sediment content When the raw water is 0.20~3.5kg/ ^m3 , the raw water should be pre-sedimented in the pre-sedimentation concentration reuse tank before entering the sedimentation tank for treatment; when the sand content of the raw water exceeds 3.5kg/ ^m3 , the raw water should firstly It enters the grit chamber for grit, and the effluent passes through the pre-sedimentation concentration reuse pond and enters the sedimentation tank for treatment.

High-efficiency sedimentation tank 2 to deal with seasonal high turbidity water treatment process, the raw water 1 first enters the pre-sedimentation concentration reuse tank 2, after pre-settling, the effluent enters the high-efficiency sedimentation tank 3 for sedimentation, and the effluent of the sedimentation enters the filter tank 4. After filtering, the effluent enters clean water After the pool 5 is adjusted and stored, it is pressurized by the secondary pump room 6 and sent to the municipal pipe network 7 . The sludge discharged from the pre-sedimentation concentration reuse tank 2 and the high-efficiency sedimentation tank 3 is connected to the balance tank 8 for storage, and the discharged sludge enters the dehydration machine room 9 for dehydration treatment, and the dried sludge is transported outside for disposal, and the filtrate is discharged into the concentrated mass-energy conversion tank 10 . After the rinsing wastewater from the filter tank 4 is discharged into the drain tank 14, it is generally lifted and mixed with the raw water 1 for reuse, and discharged into the concentrated mass-energy conversion tank 10 under emergency conditions. The concentrated mass-energy conversion tank 10 receives the filtrate from the dehydration machine room 9 and the emergency drainage from the drainage tank 14 for further treatment, and part of the organic matter is converted into bio-energy recovery 11, and the rest of the sludge is subjected to sludge drying treatment 12; the concentrated mass-energy conversion tank 10 filters out The liquid can be discharged into the drainage pool 14 and used as raw water after being promoted, or discharged into the river water body 13 up to the standard. When the sand content of the raw water 1 exceeds 3.5kg/ ^m3 , the raw water 1 first enters the grit chamber 15 at the water intake point for sand deposition; when the turbidity of the raw water 1 is lower than 200NTU or the sand content is lower than 0.20 kg/ ^m3 , The raw water 1 can directly enter the high-efficiency sedimentation tank 3 beyond the pre-sedimentation, concentration and reuse tank 2. The grit chamber 15 and the pre-sedimentation concentration reuse pond 2 regularly discharge sand. Add potassium permanganate 16 before grit chamber 15 and pre-sedimentation concentration reuse pond 2, add PAM17 before grit chamber 15 and pre-sedimentation concentration reuse pond 2 and high-efficiency sedimentation tank 3, and before high-efficiency sedimentation tank 3 Add alum 18, add chlorine 19 before and after the clear water tank 5, and add powdered carbon 20 after the grit chamber 15.

In the process of treating seasonal high turbidity water in the horizontal flow sedimentation tank 21 or the inclined tube sedimentation tank 22, the raw water 1 first enters the pre-sedimentation concentration reuse tank 2, and after pre-settling, the effluent enters the horizontal flow sedimentation tank 21 or the inclined tube sedimentation tank 22 for precipitation. After the sedimentation effluent enters the filter tank 4 for filtration, the effluent enters the clear water pool 5 for adjustment and storage, and is sent to the municipal pipe network 7 by the secondary pump room 6 under pressure. The advection sedimentation tank 21 or inclined tube sedimentation tank 22 discharges sludge into the sludge discharge tank 23 and then lifts it into the concentration tank 24 for concentration. The supernatant of the concentration tank 24 is discharged into the concentrated mass-energy conversion tank 10. The concentration tank 24 discharges sludge and pre-sedimentation concentration The sludge discharged from the recycling pool 2 is regulated and stored in the balance pool 8 and then enters the dehydration machine room 9 for dehydration treatment. After the rinsing wastewater from the filter tank 4 is discharged into the drain tank 14, it is generally lifted and mixed with the raw water 1 for reuse, and discharged into the concentrated mass-energy conversion tank 10 under emergency conditions. The concentrated mass-energy conversion pool 10 receives the supernatant from the concentrated pool 24, the filtrate from the dehydration machine room 9, and the emergency drainage from the drainage pool 14, and then conducts further treatment, and part of the organic matter is converted into bioenergy for recovery 11, and the rest of the sludge is subjected to sludge drying treatment 12; concentrated The filtrate from the mass-energy conversion tank 10 can be discharged into the drainage tank 14 and used as raw water after being lifted, or discharged into the river water body 13 up to the standard. When the sand content of the raw water 1 exceeds 3.5kg/m ³ , the raw water 1 first enters the grit chamber 15 at the water intake point for sand deposition; when the turbidity of the raw water 1 is lower than 200NTU or the sand content is lower than 0.20 kg/m ³ , The raw water 1 can directly enter the advection sedimentation tank 21 or inclined tube sedimentation tank 22 beyond the pre-sedimentation, concentration and reuse tank 2 . The grit chamber 15 and the pre-sedimentation concentration reuse pond 2 regularly discharge sand. Add potassium permanganate 16 and PAM17 before sand discharge tank 15 and pre-sedimentation concentration reuse tank 2, add alum 18 before advection sedimentation tank 21 or inclined tube sedimentation tank 22, add chlorine 19 before and after clear water tank 5, Add powdered charcoal 20 behind the sand tank 15.

Fig. 3 ~ Fig. 5 is a kind of structural diagram of pre-sedimentation thickening reuse pond, this presettling concentration reuse pond comprises pond body 30 and pump room 31 for dredging, it is characterized in that the center with water distribution hole 57 is arranged in pond body 30 The water distribution bucket 32 and the rectifying bucket 53 arranged outside the central water distribution bucket 32, the central water distribution bucket 32 is connected with the water inlet pipe 33 arranged at the bottom of the pool body, and the upper edge of the pool body 30 is provided with a water outlet and matched with the water outlet Weir plate 34, the outlet tank is connected with the follow-up sedimentation tank through the outlet pipe 35, the thickening mud scraper 36 is set in the pool body 30, the mud discharge bucket 37 is set at the bottom of the pool body, and the sand outlet pipe 38 and the mud discharge bucket are set at the bottom of the pool body 30 37 is connected, the mud pump room 31 is provided with a water pump 42, a manual valve 39 is installed on the water pump inlet pipeline, a check valve 40 and a manual valve 39 are installed on the water pump outlet pipeline, an electric valve 41 is also installed on the sand outlet pipe 38, and the inlet of the water pump 42 The pipeline is connected with the upstream of the sand outlet pipe through the sand pumping pipe 43, the outlet pipe of the water pump is connected with the downstream of the sand outlet pipe through the sand discharge pipe 44, the inlet pipe of the water pump is connected with the water inlet pipe through the mud pumping pipe 45, and the outlet pipe of the water pump is also connected with the discharge pipe. The mud pipe 46 is connected. Described outlet tank comprises the inner outlet tank 47 that is arranged on the inside of the pool body and the outlet tank 48 that is arranged on the outside of the pool body, and the connecting groove 49 that communicates with the inner outlet tank 47 and the outlet tank 48, and the outlet tank 48 is connected with the outlet pipe 35. An emptying pipe 50 is provided on the bottom side of the pool body. The water inlet pipe is also provided with a return water pipe 51 to be connected with the water outlet of the drainage pool 14 in the factory area. Set flushing plugs 55 at the upper and lower parts of the pre-sedimentation concentration recycling device, and set flushing pipes 54 with check valves and manual valves on the sand outlet pipes, which are used as tank and pipeline cleaning measures. A PAM dosing point 56 is provided on the water inlet pipe of the pre-sedimentation concentration recycling device. A valve well 52 is arranged on the water inlet pipe 33 , the sand outlet pipe 38 and the vent pipe 50 .

Among them, the inner and outer water tanks use adjustable perforated water tanks or adjustable toothed weir plate water tanks.

The structure of the adjustable perforated water outlet is shown in Figures 6 to 9, the adjustable water outlet includes a perforated water outlet 101, the bottom of the perforated water outlet 101 is provided with an adjustment plate 104, and the adjustment plate 104 is connected to the leveling plate 105 through an adjustment bolt 106, The screed 105 is fixed on the top of the support beam or corbel 103 , and the perforated water outlet 101 is also connected with the support beam or corbel 103 through the fixed channel steel 102 . The perforated outlet trough 101 and the fixed channel steel 102 are connected by connecting bolts 109, the fixed channel steel 102 is fixed on the support beam column or the corbel 103 by the fixed bolts 108, and the fixed channel steel 102 is provided with a strip shaped Adjustment hole 118 . Adjusting nuts 107 matched with adjusting bolts 106 are respectively arranged on the upper and lower sides of the adjusting plate 104 . The bottom of the perforated water outlet tank 101 is provided with a communication hole 110 , and the side is provided with a water inlet hole 111 and a water level mark line 112 . When adjusting the perforated water outlet tank 101, first adjust the adjustment bolts 106 on both sides of the perforated water tank 101 and adjust the nut 107 up and down so that the water level mark line 112 on the side of the water tank coincides with the water level line in the pool, and then tighten the fixing bolts 108 to complete the entire adjustment process.

The structure of the adjustable toothed weir slab outlet trough is shown in Figures 10-12. The adjustable toothed weir slab outlet trough includes a reinforced concrete outlet trough 113, and the reinforced concrete sill 113 is provided with a toothed weir slab 114. The weir plate 114 is connected to the reinforced concrete water outlet 113 through the weir plate gasket 115 , and the toothed weir plate 114 is also connected to the reinforced concrete water outlet 113 through the support plate 116 . The toothed weir plate 114 is connected with the reinforced concrete outlet trough 113 through the fixing bolts 108 and the weir plate gasket 115; the support plate 116 is connected with the toothed weir plate 114 through the connecting bolts 109, A strip-shaped adjustment hole 118 is provided, and a water level mark line 112 is provided on the side of the toothed weir plate 114 . When adjusting the toothed weir plate 114, first adjust the relative position of the support plate 116 and the toothed weir plate 114 through the connecting bolts 109 so that the water level mark line 112 on the side of the toothed weir plate 114 coincides with the water level line in the pool, and then tighten the fixing bolts 108, that is The entire adjustment process can be completed.

The raw water enters the central water distribution tank with water distribution holes through the water inlet pipe from the bottom of the pre-sedimentation concentration reuse tank, and then distributes water through the water distribution holes and the water distribution tank. The connecting tank is connected and collected to the outgoing water tank, and then enters the subsequent sedimentation tank through the outlet pipe. The sludge in the water is concentrated by the thickening mud scraper, collected in the mud discharge bucket, and discharged through the sand outlet pipe. There is a water pump for extracting sludge in the mud pump room. When the water inlet pipe and the sand outlet pipe are blocked, the mud and sand accumulated in the pipeline are extracted through the mud suction pipe and the sand outlet pipe, and can be discharged to the sand outlet pipe through the sand discharge pipe. Downstream of the electric valve, or discharged into the sludge storage system of the plant through the sludge discharge pipe.

The pre-sedimentation concentration reuse tank combines raw water pre-sedimentation treatment and sludge discharge concentration treatment process together, adapts to seasonal high turbidity and normal low turbidity working conditions, efficiently utilizes the treatment capacity of structures to save floor space, and realizes Combination of water purification process and production wastewater treatment process

Among them, grit chamber, high-efficiency sedimentation tank, advection sedimentation tank, inclined tube sedimentation tank, filter tank, clear water tank, secondary pump room, drainage tank, sludge discharge tank, concentration tank, balance tank, dehydration machine room and concentrated mass-energy conversion tank All are prior art and will not be described in detail. the

Claims (9)

1. a seasonal high turbid former water technology, it is characterized in that former water is introduced into after the concentrated reuse tank preliminary sedimentation of preliminary sedimentation, water outlet enters settling tank precipitation, precipitation water outlet enters after filter, water outlet enters clean water basin regulate and store after, by repumping house pressurization, send into city planting ductwork, the spoil disposal access counterbalance cell of the concentrated reuse tank of preliminary sedimentation stores, mud extraction enters dehydration machine room and carries out processed, deviates from dry mud outward transport and disposes, and filtrate enters concentration mass energy conversion pool.

2. seasonal ultra's treatment process as claimed in claim 1, is characterized in that settling tank adopts efficient sedimentation tank, and the concentrated reuse tank spoil disposal of the spoil disposal of efficient sedimentation tank and preliminary sedimentation enters in the lump dehydration machine room and carries out processed after counterbalance cell is regulated and stored.

3. seasonal ultra's treatment process as claimed in claim 1, it is characterized in that settling tank adopts larger horizontal sedimentation tank or the tube settler of occupation of land face, behind horizontal sedimentation tank or tube settler spoil disposal access spoil disposal pond, promote that to enter concentration basin concentrated, concentration basin supernatant liquor enters concentration mass energy conversion pool, and the concentrated reuse tank spoil disposal of concentration basin spoil disposal and preliminary sedimentation enters in the lump dehydration machine room and carries out processed after counterbalance cell is regulated and stored.

4. seasonal ultra's treatment process as claimed in claim 1, it is characterized in that filter cell rinse waste water enters after blowoff basin, after general lifting with former water mixing reuse, under emergency condition, enter concentration mass energy conversion pool, concentration mass energy conversion pool is accepted to deepen processing after dehydration machine room filtrate and the emergent draining of blowoff basin, partial organic substances is converted into bioenergy and reclaims, and all the other mud carry out sludge drying disposal; After concentration mass energy conversion pool filtrate can enter blowoff basin and promotes as former water conservancy use, or the river water that enters up to standard.

5. as claim, the seasonal ultra's treatment process described in 1, while it is characterized in that at ordinary times low turbidity operating mode raw water turbidity lower than 200NTU or sediment concentration lower than 0.20 kg/m ³, former water surmounts the concentrated reuse tank of preliminary sedimentation and directly enters settling tank processing; When raw water turbidity surpasses 200NTU or sediment concentration at 0.20 ~ 3.5kg/m ³time, former water first enters settling tank again and processes after the concentrated reuse tank preliminary sedimentation of preliminary sedimentation; When former water sediment concentration surpasses 3.5kg/m ³time, former water should first be introduced into settling pit sand setting at dry point place, and water outlet enters settling tank through the concentrated reuse tank of preliminary sedimentation again and processes.

6. seasonal ultra's treatment process as claimed in claim 2, is characterized in that adding potassium permanganate before sediment outflow pond and the concentrated reuse tank of preliminary sedimentation, before sediment outflow pond and the concentrated reuse tank of preliminary sedimentation with in efficient sedimentation tank, adds PAM.

7. seasonal ultra's treatment process as claimed in claim 3, is characterized in that adding potassium permanganate and PAM before sediment outflow pond and the concentrated reuse tank of preliminary sedimentation.

8. seasonal ultra's treatment process as claimed in claim 1, it is characterized in that former water enters the center water distribution bucket with distributing hole by water inlet pipe from body bottom, the concentrated reuse tank of preliminary sedimentation pond, again by distributing hole and water distribution bucket water distribution, after preliminary sedimentation, water outlet enters interior effluent trough and outer effluent trough by weir plate, water outlet is communicated with after being pooled to outer effluent trough and is entered post precipitation pond by rising pipe by connective slot, in water, mud collects at mud-removing bucket after concentrating by concentrated mud scraper, by going out sandpipe, arranges outward.

9. seasonal ultra's treatment process as claimed in claim 8, it is characterized in that establishing in slush pump room the water pump of extraction mud, at water inlet pipe with while shaking out blockage, by extraction mud pipe with take out sandpipe and extract pipeline inner product mud and long-pending sand, can drain into out the sandpipe movable valve downstream that powers on by sediment outflow pipe, or enter plant area's sewage sludge storage system by shore pipe.