UA39744U - Equipment for biological wastewater treatment - Google Patents

Abstract

An euipment for biological wastewater treatment consists of one activation treatment reservoir, in which the aeration equipment is fixed, and longitudinal sedimentation (secondary) reservoir with collection trough and outlet for treated water.

Description

sedimentation (secondary) reservoirs. Preferably, they have a joint composition of one or two pairs of rectangular activation purification tanks with raw wastewater drive, in which at least one rectangular longitudinal sedimentation (secondary) tank with an outlet of purified water, which may have a sloping bottom, is created on one side of the equipment body in one city, and at the longitudinal sedimentation (secondary) tank and the second side of the activation purification tank in the housing of their equipment, a longitudinal temporary accumulation tank of excess sludge is created, and near the side of the accumulation tank of excess sludge and on the third side of the activation purification tank in the housing of their equipment a longitudinal receiving tank for wastewater and rainwater is formed. Individual parts of the cleaning equipment in this solution are mutually properly structurally connected. Rectangular sedimentation (secondary) tanks are either vertical flow or horizontal. If we are talking about rectangular sedimentation (secondary) tanks with horizontal flow, in this case the flow is always longitudinal, exactly along the longer side of the tank, i.e. the inlet of the mixture of purified water and sludge from the activation treatment tank is on the shorter side of the sedimentation (secondary) tank in the direction its length The shape of the sedimentation (secondary) tank has at least dimensions in the ratio of width to length greater than - 1:22. Construction systems with rectangular tanks have the advantage that they take up little space, but if they are integrated with a sedimentation (secondary) tank in one building concrete object, then the sedimentation (secondary) tank in larger sewage pumping stations is horizontal with longitudinal flow. Horizontal tanks with longitudinal-horizontal flow have less effect than round ones with horizontal flow, or rectangular but with vertical flow.

Such equipment, taking into account the necessary volume of wastewater treatment, is still structurally complex and contains a large number of internal partitions for its segments. In connection with these circumstances, they require great planar complexity, significant construction investment costs and a long period for construction.

There are also known technical solutions according to (patent C7 280 940), which consist of four phases of cleaning, where the wastewater is first gradually aerated, then partially cleaned, then additionally aerated, and at the end additionally settled. All mentioned cleaning phases are performed in four zones located in a common tank. In order to be able to adapt the equipment to the growing load and the transforming relationship between hydraulic and biochemical pollution, there are dividing walls between individual treatment zones, which are located with the possibility of movement in order to change the required volume of individual zones.

Such equipment is suitable only for small sewage pumping stations with an adaptive cleaning performance adjustment system, and from a technical point of view, they are structurally complex and require a lot of costs.

To a very limited extent, the equipment currently used for wastewater treatment consists of a single circular activation treatment tank with a contaminated wastewater drive, which is serially structurally directly connected to at least one separate circular sedimentation tank with a discharge of treated water.

The described equipment for the required volume of wastewater treatment is too structurally complex, that is, it requires a technically and constructively capable builder and a large construction site, large construction costs and a long construction period.

For the simultaneous removal of nitrates from polluted water, it is suitable to use solutions with circulation activation, where nitrification and denitrification of polluted water take place in one tank.

It has great cleaning efficiency and a simple management system. But circulating activation requires larger volumes than activation with sludge regeneration and is therefore relatively expensive in terms of financing.

Technical solutions in accordance with (patent C2 288 7051) are also known, consisting of three tanks connected in series with each other, from the outer circular ring of primary sedimentation, the middle circular ring of activation and the inner sedimentation (secondary) tank. At the beginning of the outer circular ring of primary sedimentation, a sand trap is placed, from which pollution is removed to the outside using a submersible pump under pressure from the tank, and at the end of the outer circular ring of primary sedimentation, there is a pump of excess activated sludge with a pressure that appears at the beginning of sedimentation. At the end of the middle circular activation ring, there is a submersible return sludge pump and a pump for the internal circulation of denitrification - nitrification with pressure at the start of activation. In the internal (secondary) sedimentation tank, there is a receiving chamber for floating pollution with a submersible pump, the pressure of which is adjacent to the outer circular ring of primary sedimentation. At the same time, the shut-off fittings for pumping out sediment, pumping out tanks and purified water are located in the mine well.

The solution does not allow regeneration of the sludge, so it has low economic efficiency and, since it requires a counterflow of liquid to and from the activation treatment tank, it is technically difficult. Moreover, the installation of three consecutively connected tanks is complex in terms of construction and costs and requires a lot of time to implement. Also, such equipment requires the creation of the next building object for the sewage pumping station, which increases the building with a positive slope of such sewage pumping station.

To a limited extent, installations consisting of a circular aerobic activation treatment tank with a contaminated wastewater supply, in which a sedimentation (secondary) tank with a purified water outlet is placed coaxially, are also used for wastewater treatment. Systems with circular activation purification tanks are always supplemented with circular sedimentation (secondary) tanks, which have a horizontal supply or combined with a vertical supply, and from the point of view of placement, these tanks are mostly free-standing. Alternatively, such a solution without a contaminated water line can be placed in a coaxially installed circular outer casing of the installation with radial partitions between the outer casing of the installation and the casing of the activation cleaning tank in such a way that at least one segment of the annular segments thus created forms the pre-stage of the activation cleaning tank with a liner of polluted wastewater, and, according to the need for cleaning, one adjacent segment can form a reserve tank of activated sludge, and the second - a receiving chamber for rainwater wastewater. Individual parts of the treatment plant in this solution are constructively connected to each other.

At the same time, such installations for the required volume of wastewater treatment are structurally complex and require a structurally and technically capable fitter. Also, due to the need for a large planar and centrally installed settling chamber, they require a large construction area. Based on the above, such installations require a large building area and large construction costs and a long building life.

Known installations for wastewater treatment in accordance with (utility model 5K 3246) consist of an aerobic activation purification tank with a supply of contaminated wastewater and at least one mutually constructively flow-connected sedimentation (secondary) tank with a purified water outlet, where the aerobic purification tank is located with the supply of contaminated wastewater in the middle of the outer casing of the installation, moreover, between the inner surface of the circular outer casing of the installation and the outer surface of the activation cleaning tank, at least one sedimentation (secondary) tank with the outlet of purified water is created. Between the inner surface of the circular outer casing of the installation, the outer surface of the aerobic activation treatment tank and a pair of valves, an activated sludge regeneration tank and/or a temporary storage tank for excess sludge, and/or at least one receiving chamber for rainwater or fecal water can be installed near the sedimentation (secondary) tank , and/or at least one additional tank for any use. Also, the bottom of the sedimentation (secondary) tank between the inner surface of the circular outer jacket of the installation and the outer surface of the activation cleaning tank can be aligned to at least one place, and such equipment has a structurally connected activation cleaning tank by at least one tank of the installation and serially structurally connected at least two tanks of the installation are placed next to it.

Since such installations require a large number of contact areas with the inner surface of the circular outer casing and the outer surface of the activation purification tank for the required volume of wastewater treatment, they are complex in terms of construction, require a technically capable fitter and high construction costs and a long period for the implementation of works. Also, the large volume of their activation purification tank solves only a partial leveling of the supply of purified water through the treatment plant without its necessary multiple shutdowns.

Moreover, in all known aerobic biological treatment plants, a large amount of unnecessary biological sludge is created in the process of cleaning polluted wastewater, and in connection with this, for the consumers of the plant, there are increased costs associated with its storage, manipulation, transport and processing. Also, such installations do not make possible further operation after a long-term stoppage of cleaning without the need to replace the entire activation aerobic aggregate.

Different types of anaerobic installations for biological wastewater treatment are also known, consisting of an outer casing of the installation with a circular or double channel cross-section, which closes the cleaning tank with a biological anaerobic filter or a biological anaerobic aggregate, which is equipped with a contaminated sewage water supply on one side, and on the other side at the water level - the outlet of purified water. Since the anaerobic biological filter and anaerobic biological filler in the activation treatment tank technologically does not require the need for oxygen from the air during the treatment of polluted wastewater, this installation is structurally simple compared to aerobic ones. The disadvantage of these installations is that they require a very efficient passage of contaminated water through the largest possible mutual contact area, which during cleaning is consistently contaminated, as a result of which the cleaning efficiency of such installations decreases. Although this is partially mitigated by an increase in the thickness and contact area of anaerobic biological material in wastewater, as a result, the effectiveness of biological wastewater treatment decreases and costs for the construction and operation of the treatment plant increase. Since the contamination of anaerobic biological material during the first contact with contaminated water is quite uniform over the entire plane, during cleaning, it is necessary to frequently pump out the entire installation and clean the entire volume, including the anaerobic biological cleaning material. Therefore, such installations must be of such a size that they are sufficient for high impact cleaning of a large volume of wastewater, that is, they must have large receiving tanks.

The most anaerobic biological material that is difficult to remove from polluted water is ammonia, and therefore such installations must be equipped with independent aerobic activation tanks with the same volume of wastewater treatment. On the basis of these circumstances, installations achieve relatively low cleaning efficiency compared to aerobic biological treatment and require a technically capable fitter, high construction costs and a long period of construction work, and high operational costs.

Other known installations for nitrification and denitrification of organic substances in wastewater are mentioned, for example, in

Irishenni C5 AO 248616), where the activation cleaning space is divided by partitions into interrupting and non-interrupting parts. At the same time, the partition either partially or completely protrudes above the water level and forms a gap at the bottom of the tank.

Although this installation is simple, it does not have a separation chamber and aerobic cleaning, so it is impossible to achieve high-quality wastewater treatment.

Based on the real needs of wastewater treatment, the treatment facility for a specific source of polluted water must have high operational stability and include technical and technological elements that intentionally eliminate fluctuations and regulate the behavior of the biocenosis (structure) of activated sludge with minimal requirements for operation and long-term proven effectiveness cleaning

The task of the proposed technical solution is therefore the elimination or minimization of the shortcomings of the previous equipment for wastewater treatment.

The mentioned shortcomings are largely eliminated by the equipment for the biological treatment of wastewater in accordance with the technical solution, consisting of an activation purification tank with a contaminated wastewater line, in which aeration equipment is located, and a longitudinal sedimentation (secondary tank) with a collection chute and an outlet of purified water . The essence of the technical solution is that in the longitudinal (sedimentation) tank, which has dimensions in the ratio of width to length - 2:3, at least one outlet of the mixture of purified water and sludge from the activation purification tank is installed on the longer side of the longitudinal sedimentation (secondary) tank, and the collection chute on the opposite longer side of the longitudinal sedimentation (secondary) tank, and the pumping of a mixture of purified water and sludge from the activation purification tank can pass either through an opening in the longer wall of the longitudinal sedimentation (secondary) tank, but which can be created with a reduced height of the face of the longitudinal of the sedimentation (secondary) tank in the longitudinal sedimentation (secondary) tank below the level of the mixture of purified water and sludge in the activation purification tank or through the connecting pipe.

At the same time, it is advisable that a vertical distribution line of purified water and sludge from the activation purification tank is placed in the longitudinal sedimentation (secondary) tank and/or if there is a longitudinal sedimentation (secondary) tank installed inside the activation purification tank, and, alternatively, the activation purification tank can be created at least on one side of the longitudinal sedimentation (secondary) reservoir.

Further, it is advisable that, in an alternative implementation, the activation cleaning tanks on the sides of the longitudinal sedimentation (secondary) tank are mutually gravitationally connected through a passage.

It is also advisable that at least one manipulation recess is created in the bottom part of the longitudinal sedimentation (secondary) tank, or if more than 4 manipulation recesses are created on the entire bottom of the longitudinal sedimentation (secondary) tank, the faces of which can be made with a slope and an angle in the downward direction .

It is equally advisable that a regeneration tank is located near the longitudinal sedimentation (secondary) tank, and the sludge regeneration tank can be installed inside the activation treatment tank, and/or if a sludge thickening tank is located near the longitudinal sedimentation (secondary) tank, moreover, the sludge thickening tank can be installed inside the activation cleaning tank, and/or if at least one other auxiliary process space is located near the longitudinal sedimentation (secondary) tank, which can be installed inside the activation cleaning tank.

The equipment for biological wastewater treatment according to the technical solution with a horizontal sedimentation (secondary) tank is, unlike all modern horizontal tanks with bottom wiping, a new design solution with transverse and vertical convection. The biggest advantage of this solution is the compactness of the design with the minimization of costs for technological equipment, the reduction of the volume of construction costs for such a sewage treatment plant and at the same time a significant increase in the efficiency of sludge separations using transverse convection with a vertical direction in the sedimentation (secondary) tank. The advantage of the technical solution is its reduced building area, which allows placing all the biological cleaning of the sewage treatment plant in one building. The next advantage is that by stopping the regeneration with operation, the volume of biological sludge can be reduced in the cleaning process, in connection with which its loading increases, and such a treatment plant can work biologically even with a reduced flow of pollution. Also, if necessary, the technical solution allows repeated circulation of purified water in the activation purification tank, as a result of which, in relation to the mentioned equipment in the current state, a technically significantly higher efficiency of the purification station is achieved with the achievement of high purity and quality of purified water.

A specific example of a structural installation for biological wastewater treatment according to the technical solution is schematically depicted in the attached drawings, where Fig. 1 shows a section of an oval through-flow activation purification tank near a mutually connected faceted longitudinal sedimentation (secondary) tank connected on the sides with a regeneration passage tank, in Fig. 2 - a section of an oval through-circulation activation purification tank near a mutually connected faceted longitudinal sedimentation (secondary) tank with vertical pumping of the supplied mixture of purified water and sludge from the activation purification tank to the sedimentation (secondary) tank, which is connected on the sides with the regeneration thickening tank and Fig. 3 - a vertical section along A-A of the installation shown in Fig. 2, and Fig. 4 - a section of an oval through-circulation activation cleaning tank near the mutually connected faceted pos. of a long sedimentation (secondary) tank with vertical pumping of the supplied mixture of purified water and sludge from the activation purification tank to the sedimentation (secondary) tank, which is connected on the sides with a regeneration tank, a thickening tank and other technological space, in Fig. 5 - an installation consisting of from two longitudinal activation purification tanks, mutually connected on one side by an auxiliary technological space, and on the other side by a connecting pipe, which are installed near a faceted longitudinal sedimentation (secondary) tank, connected on the sides with a regeneration and thickening tank, in Figb - the installation depicted in Fig. 5, which has six manipulative depressions created along the entire bottom of the longitudinal sedimentation (secondary) tank, the faces of which are made at a slope and angle in the direction inward, and in Fig. 7 a section of the installation consisting of a longitudinal activation cleaning tank, installed by by the longitudinal sedimentation (secondary) tank, the bottom of which has six depressions, the edges of which are processed at an angle to the middle.

Implementation examples

Example 1

The installation for the biological treatment of wastewater according to Fig. 1 consists of an oval through-flow activation purification tank 1 with an inlet 2 of contaminated wastewater, mixers C and aeration equipment 4, inside which there is a longitudinal sedimentation (secondary) tank 5 with a collection chute b and an outlet 7 of purified water At the same time, the longitudinal sedimentation (secondary) tank 5 has dimensions in the ratio of width to length - 1:4, that is, greater than 1:2. On the longer side of the longitudinal sedimentation (secondary) tank 5, the lines 8 of the mixture of purified water and sludge from the activation cleaning tank 1 are placed.

At the same time, well-known aeration equipment 4 and two agitators 3 are installed in the activation cleaning tank 1. In the longitudinal sedimentation (secondary) tank 5, two manipulation depressions 10 for the sediment are further created, the edges of which are made at an angle to the middle, and the bottom of the sedimentation (secondary) tank is equipped with by the well-known, unillustrated sediment raking equipment to the manipulation thickening pits 10. Near the longitudinal sedimentation (secondary) tank 5, the regeneration tank 11 is simultaneously located on the left side, and the sludge thickening tank 12 is on the right side. Alternatively, another auxiliary technological space can be installed near the thickening tank 12, for example, a sludge trap and/or a sewage pumping station, and/or a sand trap, and/or a homogenization tank, and/or an accumulation tank, etc.

Fecal water enters the oval through-circulation cleaning tank 1 through inflow 2, where it is brought to the circulation process near the sedimentation (secondary) tank 5 by agitators C and aeration equipment 4. At the same time, depending on the need, from the regeneration tank 11 and/or the thickening tank 12 in the activation cleaning tank 1 will have the necessary concentration of sludge depending on the sludge index, that is, the separation ability and the intensity of recirculation of the reverse activated sludge.

The active aggregate in the through-circulation activation cleaning tank 1 can be either constantly aerated by aeration equipment 4 and/or sometimes (alternately) aerated and mixed by agitators 3, or mixed only by agitators 3. Supply 8 of a mixture of purified water and sludge to a sedimentation (secondary) tank 5 during filling gradually changes from vertical to horizontal, or vertical-horizontal.

At the bottom of the sedimentation (secondary) tank 5, this mixture then gradually sediments, and the resulting sediments are moved to the manipulation recesses 10 by known raking equipment, not shown, from where they are then removed by a known method, for example by pumping, according to the technological need for cleaning, or to the regeneration tank 11 or to the thickening tank 12 , or the activation purification tank 1 On the surface of the mixture of purified water and sludge of the sedimentation (secondary) tank 5, purified water is formed, which is diverted from it through the collection chute 6 to the purified water drain 7.

Example 2

The installation for biological wastewater treatment according to Fig. 2 and 3 consists of an oval through-flow activation purification tank 1 with a contaminated wastewater outlet 2, mixers 3 and aeration equipment 4, inside of which there is a longitudinal sedimentation (secondary) tank 5 with a collection chute 6 and output 7 purified water. At the same time, the longitudinal sedimentation (secondary) tank 5 has dimensions in the ratio of width to length - 1:4, that is, greater than 1:2. On the longer side of the longitudinal sedimentation (secondary) tank 5, there are further lines 8 of the mixture of purified water and sludge from the activation cleaning tank 1 through the vertical distributor 9 to the sedimentation (secondary) tank. At the same time, well-known aeration equipment 4 and two agitators 3 are installed in the activation cleaning tank 1. In the longitudinal sedimentation (secondary) tank 5, two manipulation recesses 10 for the sediment are further created, the edges of which are processed at an angle to the middle, and the bottom of the sedimentation (secondary) tank 5 provided with the not-illustrated well-known sediment raking equipment to the manipulation thickening pits 10. Near the longitudinal sedimentation (secondary) tank 5, there is a regeneration tank 11 on the left side, and a sludge thickening tank 12 on the right side. Alternatively, another auxiliary technological space can be installed near the regeneration tank 11, for example, a sludge collector and/or a sewage pumping station, and/or a sand collector, and/or a homogenization tank, and/or an accumulation tank, etc.

Fecal waters enter the oval through-circulation cleaning tank 1 through an inflow, where by agitators C and aeration equipment 4 they are brought to the circulation process near the sedimentation (secondary) tank 5. At the same time, depending on the need, from the regeneration tank 11 and/or the thickening tank 12, it will arise in the activation cleaning tank 1 requires a sludge concentration depending on the sludge index, that is, the separation ability and the intensity of recirculation of the reverse activated sludge.

The active aggregate in the through-circulation activation cleaning tank 1 can be either continuously aerated by aeration equipment 4 and/or sometimes (alternately) aerated and mixed by stirrers 3, or mixed only by stirrers C. Supply 8 of the mixture of purified water and sludge to the sedimentation (secondary) tank 5 from the vertical distributor 9 is vertical, even vertical-horizontal. This mixture then gradually sediments at the bottom of the sedimentation (secondary) tank 5, and the resulting sediments are moved by well-known raking equipment, not shown, to the manipulation pits 10, from where they are then removed by a known method, for example by pumping, according to the technological need for cleaning, or to the regeneration tank 11 or to the thickening tank 12 , or the activation purification tank 1. At the same time, purified water is formed on the surface of the mixture of purified water and sedimentation (secondary) sludge 5, which is diverted from it through the collection chute 6 to the purified water drain 7.

Example C

The installation for biological wastewater treatment in accordance with Fig. 4 consists of an oval through-flow activation purification tank 1 with a line 2 of contaminated wastewater, mixers C and aeration equipment 4, inside which there is a longitudinal sedimentation (secondary) tank 5 with a collection chute 6 and an outlet 7 of purified water At the same time, the longitudinal sedimentation (secondary) tank 5 has dimensions in the ratio of width to length - 1:4, that is, greater than 1:2. On the longer side of the longitudinal sedimentation (secondary) tank 5, there are further lines 9 of the mixture of purified water and sludge from the activation cleaning tank 1 through the vertical distributor 9 to the sedimentation (secondary) tank. At the same time, well-known aeration equipment 4 and two agitators 3 are installed in the activation cleaning tank 1. In the longitudinal sedimentation (secondary) tank 5, two manipulation recesses 10 for the sediment are further created, the edges of which are made at an angle to the middle, and the bottom of the sedimentation (secondary) tank 5 is provided by well-known sediment raking equipment, not shown, to the manipulated thickening pits 10. Near the longitudinal sedimentation (secondary) tank 5, a regeneration tank 11 is simultaneously located on the left side, and on the right side - a sediment (sludge) thickening tank 12 with another auxiliary technological space 13, for example, a sludge trap and /or a sewage pumping station, and/or a sand trap, and/or a homogenization tank, and/or an accumulation tank, etc. Alternatively, the location of the thickening tank 12 and another technological space 13 can be mutually replaced.

The process of cleaning fecal water is the same as that given in example 2, with the fact that, if necessary, the auxiliary technological space 13 is also used in the cleaning process in a known way.

Example 4

The installation for biological wastewater treatment according to Fig. 5 consists of two longitudinal activation purification tanks 1 with a supply line 2 of contaminated wastewater to one (or at least one) activation purification tank 1, which are mutually connected on one side by an auxiliary technological space 13, and on the other side - by the connecting pipe 14 and which are installed near the longitudinal sedimentation (secondary) tank 5, which is connected on the sides with the regeneration tank 11 and the thickening tank 12. Next, the installation consists of aeration equipment 4, placed inside at least one activation cleaning tank 1 and with longitudinal sedimentation (secondary) tank 5 with collecting chute 6 and outlet 7 of purified water. At the same time, the longitudinal sedimentation (secondary) tank 5 has dimensions in the ratio of width to length - 1:4, that is, greater than 1:2. On the long side of the longitudinal sedimentation (secondary) tank 5, the lines 8 of the mixture of purified water and sludge from the activation purification tank 1 are placed. In the longitudinal sedimentation (secondary) tank 5, two manipulation recesses 10 for the sediment are also created, the faces of which are made with an inclination to the middle, and the bottom of the sedimentation (secondary) tank 5 is equipped with a well-known, unillustrated device for raking sediment to the manipulated thickening recesses 10. Alternatively, another unillustrated auxiliary technological space can be installed near the thickening tank 12, for example, a sludge trap and/or a sewage pumping station, and/or a sand trap, and/ or a homogenization tank, and/or an accumulation tank, etc.

The process of fecal water purification is the same as that given in example 1, with the fact that, if necessary, the auxiliary technological space 13 is used in the cleaning process in a known way. The only difference is in the configuration of the purification tank 1 and that the activation purification of wastewater in this example is not circulatory.

The active aggregate in the activation cleaning tank 1 can be either constantly aerated by aeration equipment 4 and/or sometimes (alternately) aerated and mixed by stirrers 3, or mixed only by stirrers 3.

Example 5

The installation for biological wastewater treatment according to Fig. b consists of two longitudinal activation purification tanks 1 with a supply line 2 of contaminated wastewater to one (or at least one) activation purification tank 1, which are mutually connected on one side by an auxiliary technological space 13, and on the other side - by the connecting pipe 14 and which are installed near the longitudinal sedimentation (secondary) tank 5, which is connected on the sides with the regeneration tank 11 and the thickening tank 12. Next, the installation consists of aeration equipment 4, placed inside at least one activation cleaning tank 1 and with longitudinal sedimentation (secondary) tank 5 with collecting chute 6 and outlet 7 of purified water. At the same time, the longitudinal sedimentation (secondary) tank 5 has dimensions in the ratio of width to length - 1:4, that is, greater than 1:2. On the longer side of the longitudinal sedimentation (secondary) tank 5, there is a line 8 of a mixture of purified water and sludge from the activation purification tank 1. The entire bottom of the sedimentation (secondary) tank 5 has six manipulation recesses 10, the edges of which are made at an angle to their middle. Alternatively, another non-illustrated auxiliary technological space may be installed near the thickening tank 12, for example, a sludge trap and/or a sewage pumping station, a/or a sand trap, a/or a homogenization tank, and/or an accumulation tank, etc.

The fecal water purification process is the same as that given in example 5 and differs in the method of sediment removal from the bottom of the sedimentation (secondary) tank. In this example of the implementation of a technical solution during sewage treatment, this mixture sediments sequentially by gravity in the manipulation recesses 10 to the slope of the treated bottom of the longitudinal sedimentation (secondary) tank 5, and the sediments produced in this way are subsequently moved by known equipment, not shown, such as a pump, in accordance with current technological needs of cleaning or to the regeneration tank 11 or the sludge thickening tank 12, or the activation cleaning tank 1.

Example 6

The installation for the biological treatment of wastewater according to Fig. 7 consists of one longitudinal activation purification tank 1 with a line 2 of contaminated wastewater located near a longitudinal sedimentation (secondary) tank 5 with a collection chute 6 and an outlet 7 of purified water. In the bottom of the longitudinal sedimentation (secondary) tank 5, six recesses for sediment are created, the sides of which are inclined to the middle. At the same time, the longitudinal sedimentation (secondary) tank 5 has dimensions in the ratio of width to length - 1:4, i.e. greater than 1:22, and on the long side of the longitudinal sedimentation (secondary) tank 5 there is a pipeline 8 of a mixture of purified water and sludge from the activation treatment tank 1. Alternatively, near the longitudinal sedimentation (secondary) tank 5, a regeneration tank (not shown) can be installed on one side and/or a sludge thickening tank (not shown) on the other side, or an auxiliary technological space (not shown), such as a sludge trap and/or a sewage pumping station, and /or sand trap, and/or homogenization tank, and/or storage tank, etc. Next, the installation consists of known aeration equipment 5 placed in the activation cleaning tank 1.

Fecal water enters the activation treatment tank 1 through the line 2, where it is bubbled with air using the aeration equipment 4. In this example of the implementation of the technical solution during the treatment of fecal water, this mixture sediments sequentially by gravity in the manipulation recesses 10 to the slope of the treated bottom of the longitudinal sedimentation (secondary) tank 5, and the sediments produced in this way are then moved by known non-illustrated equipment, such as a pump, in accordance with the actual technological needs of cleaning, or to the regeneration tank 11, or the sludge thickening tank 12, or the activation cleaning tank 1.

The described and illustrated solutions are not the only possible solutions according to the technical solution, since the installations can have only one longitudinal activation cleaning tank with the sedimentation (secondary) tank. The activation cleaning tank can be without agitators or with a different number of agitators. In the part of the bottom of the longitudinal sedimentation (secondary) reservoir, only one manipulation recess or more than two manipulation recesses for sediment with a bottom treated to a slope or without a slope can also be created. In total, more than four sediment manipulation depressions can be created at the bottom of the longitudinal sedimentation (secondary) reservoir. Also, according to the technical solution, the installation can have any location near the sedimentation (secondary) tank in the space of the regeneration tank and/or the thickening tank and/or the auxiliary technological space. The feed of the purified water mixture from the activation purification tank may also pass through one or more holes in any number or at least one known connecting pipe, not shown, or overflow over the face of the longitudinal sedimentation (secondary) tank.

Industrial use

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