ES2291086A1 - Black and grey wastewater treating station has treatment plant and control cabin, where treatment plant comprises inlet aeration chamber for treating wastewater and anoxic chamber is provided for collecting of excess fluid - Google Patents

Abstract

The black and grey wastewater treating station has a treatment plant and a control cabin. The treatment plant comprises an inlet aeration chamber for treating the wastewater. An anoxic chamber is provided, which is connected to the aeration chamber for collecting of excess fluid. A discharge chamber is situated after diaphragms, which separates clean and sludge discharge from the aeration chamber. Air diffusers are provided with a blower and a filter from which flow of wastewater reaches the diaphragms and the effluent is discharged into the chamber through a pump for subsequent collection.

Description

Wastewater treatment plant black and gray

Object of the invention

The present invention, as expressed in the set forth in this specification, refers to a station sewage treatment plant black and gray, which is prefabricated, compact and with all the elements already installed, of automatic and easily transportable operation, presenting characteristics that are relevant and advantageous in relationship with those that currently exist for the same purpose.

The treatment plant, conveniently installed, aims to treat wastewater black and gray (domestic and ships of all kinds) for your debugging and later downloading, getting a quality of effluent that meets the requirements established in the current regulations, no smell production and no need for remove organic sludge.

Background of the invention

The sewage treatment plants and gray in which membranes are used, they are conceived based on a thorough maintenance and risks of breakage and clogging important both for the material of the membranes themselves and for the flow chart of these plants. Normally the membranes you have to take them out of your accommodation to recover their status as flow rate and chemicals should be used for cleaning.

The use of these chemicals is incompatible with the maintenance of biology within the aeration chamber

The use of metallic flow membranes transversal and flow recovery by backwash, all this controlled by a PCL, it solves these two big problems: maintenance and lack of need for chemicals.

Description of the invention

In general, the purification station of wastewater that constitutes the object of the invention, is of combined type: Biological-Membrane-Anoxic, is that is, aerobic biological by active sludge and aeration process prolonged, membrane and anoxic.

Basically the station comprises a plant of Biological, compact and prefabricated treatment, where develop all debugging processes, and a booth of control, compact and prefabricated, where all the rooms are housed command and control components, and optionally a team of aeration and disinfection.

The treatment plant includes, first place an aeration chamber accessed by the liquid to be treated, that is, the sewage to be purified, with the particularity of that in the corresponding inlet conduit some roughing and coarse grinding media, whose media can go located before the aeration chamber or in the inside of it, commanded by the respective control panel established in the control and command cabin.

Inside such an aeration chamber is they include air diffusers fed through a duct, by means of a blower with electric motor provided in the outside of the camera, in whose camera there is also a system of self-cleaning filtration through which the fluid passes, this being sent to membranes established outside the chamber of aeration, all in such a way that the bacteria contained in the liquid to be treated, once this inside the chamber of  aeration, develop and reproduce giving rise to formation of "bacterial sludge", thanks to oxidation reinforced by the supply of air through the diffusers, said air producing agitation inside the chamber itself that prevents the decantation of solids and / or sludge in The bottom of the camera.

The commented bacteria degrade matter organic present in the chamber, forming a sludge that is separated of the effluent and retained in the chamber based on a separation by membranes, performing such process by recirculation of the fluid through the membranes established outside, which they reject solids, bacteria, etc., which are returned with the concentrated to the aeration chamber itself.

The recirculation of the fluid through the commented membranes is performed continuously using a forced filtration system, bubbling air inside the membranes, from the bottom, so that the air bubbling in addition to forcing fluid circulation, keeps the walls of the referred membranes clean.

On the other hand, the commented aeration chamber is in communication with an adjacent anoxic camera, establishing communication through an overflow where a level control is planned to constantly maintain fills (up to a certain level) said aeration chamber.

From the anoxic chamber a intermittently returned fluid to the aeration chamber, by means of a vacuum system or by means of a pump provided in a lower communication conduit between both cameras, so such that to prevent the anoxic chamber from emptying it incorporates a level sensor through which a signal is sent to the referred pump so that it ceases in its flow sending to the chamber of aeration.

The treatment plant includes a third chamber for discharge of the clean fluid, after passing through the membranes, in whose third chamber a disinfection of the effluent (clean fluid) by ozone injection if it were precise, and the corresponding gravity discharge of the liquid treated, download that can be made directly on a waste collection box either in a pumping case, or at sea (in case of ships), etc.

For its part, the air necessary for the fluid circulation through the membranes, is supplied by the motor blower, regulating the appropriate flow rate by a valve, while the permeate fluid drive in the membranes towards the discharge chamber is performed by a pump, which can even discharge the fluid outside of such download camera, in case it is not possible to download by gravity. Said pump can suck water from such a chamber of unloading, by turning rotation of it, for cleaning The membranes

In addition to the parts and elements cited, the treatment plant includes a pump in parallel with the membranes for hot washing of these, and may be cleaned by suctioned water.

The purification station is complemented by the already commented control cabin that allows to carry out the correct operation and synchronization of the different components and elements involved in the treatment plant itself.

The entire process of the described plant treatment is done without any consumables, without additives, without coagulants, or flocculants, etc., that should be dose and adjust, so no personnel is required to specific maintenance

Brief description of the drawings

To complement the description that then it will be done and in order to help a better understanding of the features of the invention, accompanies the present descriptive memo a single sheet of plans in which has represented the following:

The unique figure shown on the blueprint sheet corresponds to a schematic representation of the operation of the sewage treatment plant or treatment plant of the invention.

Description of the preferred embodiment

In view of the commented figures you can observe how the treatment plant corresponding to the wastewater purification station object of the invention, it comprises an aeration chamber 1 to which the waters access residuals to be treated, through an inlet duct, which, either inside or outside chamber 1, it incorporates roughing and crushing means P of large solids, being the operation of said grinding and crushing means commanded by the corresponding control panel of the cabin control command not shown. The level of the liquid to be purified it is kept constant in said aeration chamber 1, since when there is an excess of fluid overflows to a second anoxic chamber 2 through an overflow 3, with the particularity that the fluid level in aeration chamber 1 is maintained approximately constant by the commented overflow system of the anoxic camera 2 and through an established level 4 controller in the camera itself 1.

Inside such chamber 1 are provided air diffusers 5 whose flow is carried out through the conduit 6, from a blower 7, including conduit 6 a valve 8 for regulating the flow of that air flow to the diffusers 5.

It also includes inside a filter or filters 9 through which the fluid to be treated flows, being propelled outward towards membranes 10, which drive made through conduit 19, by applying air from blower 7, returning the fluid back to the chamber 1. Between membranes 10 and chamber 1 there are some communication channels 12, outbound and return, with corresponding valves, which can be automatic or manual as will be discussed later.

When the fluid level in chamber 1 descends below the level 4 controller, then a pump of permeate 14 that was driving clean fluid toward a third discharge chamber 15, stops, preventing it from continuing down the level while when it is above that controller of level 4, then the fluid passes into anoxic chamber 2, through overflow 3.

From the anoxic chamber 2 the fluid returns intermittently to the aeration chamber 1, through the duct 16 of communication of both, in which a pump 17 is provided, although that return can also be done by vacuum, with the particularity that to prevent the anoxic chamber 2 from emptying a level 18 sensor is planned to send orders opportune to pump 17 and cause the pump to stop to avoid precisely that level drop below sensor 18 commented.

On the other hand, the air for the circulation of fluid through the membranes 10, also comes from blower 7, through conduit 19, in which a flow regulating valve 20, in order to achieve the flow of adequate recirculation.

In this way, the permeated fluid in the membranes 10 is sucked by pump 14 and discharged to the chamber 15, and of this by gravity abroad or, depending on the discharge conditions, said pump 14 can discharge the Permeate fluid if gravity discharge is not possible.

At discharge of pump 14 can be installed discharge flow control devices 21 or control of Permeate water quality, and optionally can be installed also an ozone disinfection system.

In the conduit where the pump is inserted discharge 14, a vacuum switch 22 is provided that when it demand, either manually, and controlled by the panel corresponding control, pump 14 changes its direction of rotation and sucks water from the discharge chamber 15, circulating it to through the membranes 10, doing a cleaning backwash of the membranes 10 themselves, so that this operation, optionally, it can be done with a transverse flow pump  specific.

Sporadically, and when required, the membranes 10 can be washed hot with a pump 23. After of emptying the membrane module 10 itself, it is filled with water permeated from the discharge chamber 15, closing the valves 13 and establishing a recirculation by the pump 23, until an adequate temperature is reached that cleans the membrane walls 10. This washing process can also Be automatic, controlled by the control panel.

Finally, say that conduit 11 includes a  automatic valve 24 so that when it opens, it is performed intermittently washing the filters 9 with air, being regulated that flow of washing air by means of a valve 25.

Claims (4)

1. Black and gray wastewater treatment plant, whereby a treatment of domestic wastewater and ships of all kinds is achieved, comprising a treatment plant and a control center for the government of its operation, it is characterized in that it includes an aeration chamber (1) that collects wastewater by gravity through an inlet, in which a crusher (P) is provided for crushing large solids, said aeration chamber (1) being provided with a level controller (4) and an overflow (3) to keep the level in it constant, through which overflow (3) communicates with an anoxic chamber (2), producing in both chambers a process of aeration / anoxic for the elimination of nutrients; air diffusers (5) being provided for the creation of a continuous bubbling inside the referred aeration chamber (1), in order to increase the oxidation of coliform bacteria, as well as increase their normal development and multiplication to achieve the formation of "bacterial sludge"; with the particularity that at the exit of such an aeration chamber (1), it incorporates liquid and solid separating membranes (10) to achieve an effluent of purified liquid that is sent to a discharge chamber (15). 2. Black and gray wastewater treatment plant, according to claim 1, characterized in that the solids / liquid separation membranes (10) are complemented by a forced filtration system with continuous circulation of air bubbles, which keep the walls clean. the membranes themselves (10); having provided a self-cleaning filtration system (9) inside the aeration chamber (1), for the protection of the membranes (10), also having a pumps (14) and (23) involved in the realization of the cleaning and hot washing of the membranes (10). 3. Black and gray wastewater treatment plant, according to claim one, characterized in that the aeration (1) and anoxic (2) chambers, in addition to being communicated by the overflow (3) for the passage of wastewater from the chamber of aeration (1) to the anoxic chamber (2), remaining therein long enough to reduce nitrogen and phosphorus nutrients, are complemented by an intermittent fluid recirculation system, from the anoxic chamber (2) to the aeration chamber (1), established by means of a communication conduit (16) in which a fluid supply pump (17) has been inserted. 4. Black and gray wastewater treatment plant, according to claim 3, characterized in that the intermittent recirculation of the fluid between the anoxic chamber (2) and the aeration chamber (1) is capable of being carried out by means of a vacuum system.