DE202017106678U1 - Municipal wastewater disposal system with MBR composite membrane - Google Patents

Abstract

Municipal wastewater disposal system with MBR composite membrane comprising a coarse grid, a lifting pump, a fine grid, a sand trap, a reaction basin with MBR membrane and a disinfecting component, which are connected in series, characterized in that a foil grid, a biochemical AO basin and a distribution well between the sand trap and the reaction basin with MBR membrane are sequentially arranged, wherein the MBR membrane reaction basin is designed as a cell membrane basin having MBR membrane module components with different bore diameters.

Description

Technical area

The present utility model relates to the field of sewage treatment technology, in particular a municipal wastewater disposal system with MBR composite membrane.

State of the art

With the economic development of society, the state has made ever higher demands on the quality of the municipal water environment. At the beginning of this century, the quality of effluent discharged from municipal sewage treatment plants into major waters needs to meet state-level waste water quality standards A (referred to as "first-level A") "Pollutant Efficiency Standards for Municipal Waste Water Treatment Plants" ( GB18918 - 2002 ) to reach. In addition, more stringent criteria against the more severe pollution have been developed and implemented, such as "Pollutant emission standards in the waters of Minjiang and Tuojiang of Sichuan Province" (DB51), which is referred to as "Sichuan DB51".

As the basic biological treatment processes, activated sludge and biofilm processes are readily available in the existing sanitation of municipal wastewater treatment plants, with the MBR process accounting for more than 90 percent of all activated sludge plant varieties.

1. 1. Die Schlammkonzentration steigt allmählich im Reaktionsbecken auf, was zur Verstopfung der Membran dem abnehmenden transmembranen Fluss und sogar zur Verschmutzung der Membran führen kann, insofern wird Lebensdauer der Membran stark beeinflusst;
2. 2. Das System mit verschmutzter Membran hat nur eine kurze Lebensdauer (normalerweise von 3 bis 5 Jahren), dabei müssen sich gleichzeitig auch die Betriebskosten erhöhen;
3. 3. Die Aufgaben bzw. die gefahrlose Behandlung von der aufgefangenen gefilterten Flüssigkeit von Mikrofiltrationsmembran (10 Prozent) sowie von chemischen Reinigungsmitteln belastet die Wartungs- und Verwaltungsarbeit in Kläranlagen;
4. 4. Um die Verstopfung der Membran beim Betrieb zu vermeiden, muss die Luftspülung auf der Oberfläche der Membran besorgt werden, dafür ist die Druckluft benötigt, was zum großen Stromverbrauch und relativ hohen Betriebskosten verursachen kann.

The existing MRB treatment process generally has the following problems in maintenance and operation:

1. 1. The sludge concentration gradually increases in the reaction tank, which can lead to the congestion of the membrane, the decreasing transmembrane flow and even the contamination of the membrane, in that the life of the membrane is greatly affected;
2. 2. The contaminated membrane system has a short lifespan (typically 3 to 5 years), while at the same time increasing operating costs;
3. 3. Tasks and safe handling of the collected filtered microfiltration membrane (10%) and chemical cleaning products will burden the maintenance and management of wastewater treatment plants;
4. 4. In order to avoid the obstruction of the membrane during operation, the air purge on the surface of the membrane must be provided, this is the compressed air needed, which can cause high power consumption and relatively high operating costs.

Content of the utility model

The object of the present utility model is to provide a municipal wastewater disposal system with MBR composite membrane to solve the above problems.

• kommunales Abwasserentsorgungssystem mit MBR-Kompositmembran, umfassend einen groben Raster, eine Hebepumpe, einen feinen Raster, ein Sandfangbecken, ein Reaktionsbecken mit MBR-Membran und Desinfektionskomponente, welche nacheinander angeschlossen sind, wobei ein Foliengitter, ein biochemisches AO-Becken und ein Verteilungsbrunnen zwischen dem Sandfangbecken und dem Reaktionsbecken mit MBR-Membran nacheinander angeordnet sind, wobei das Reaktionsbecken mit MBR-Membran als ein Becken mit Zellmembran ausgestaltet ist, das die Module aus MBR-Membran Komponenten mit verschiedenen Bohrungsdurchmessern aufweist.

The technical solution of the present utility model is as follows:

• MBR composite membrane municipal wastewater disposal system comprising a coarse grid, a lift pump, a fine grid, a sand trap basin, a reaction basin with MBR membrane and disinfection component connected in series, a foil grid, an AO biochemical basin and a distribution well between the Sandbox and the reaction basin with MBR membrane are arranged sequentially, wherein the reaction basin with MBR membrane is designed as a tank with cell membrane, which has the modules of MBR membrane components with different bore diameters.

In the present utility model, the reaction basin with MBR membrane is arranged separately behind the biochemical basin or in the sand basin. In this case, the unified and modularized basin with several bore diameters and combination options is still arranged. As such, the membrane components function relatively independently of each other, and at the same time, the processing efficiency of the system can be increased.

Compared to the prior art, the advantages of the present utility model reside in the fact that the A ² O + MBR method of the present utility model is considered as a new method for biological membrane system-based sanitation. Based on the original MBR process, the quality of water in domestic municipal wastewater disposal is taken into account. In addition, the units for deeper pollutant removal or of the total nitrogen, total phosphorus and SS (suspended matter) are also built. In the reaction tank with membrane can still build an operational safety system. In this respect, stable operation, outstanding drainage quality and relatively simple management are ensured in a more extensive municipal wastewater disposal system.

list of figures

• 1 shows a schematic structural view of the utility model.

In the figures: 1. coarse grid, 2. lifting pump, 3. fine grid, 4. sand trap aeration basin; 5. foil grid; 6. biochemical AO-basin; 7. central lift pump room and distribution well; 8. Reaction basin with MBR membrane; 9. pump room for recirculating mixed liquid; 10. Pump chamber for water drainage and integrated equipment compartment; 11. Ultraviolet disinfection trench; 12. measuring room; 13. Blower system for membrane and basin; 14. Blower chamber; 15. Mud collecting basin; 16. sludge dewatering room; 17. pump chamber for backwashing the membrane; 18. collecting tank of liquid wastes with membrane backwashing; A. Municipal Wastewater; B. carbon source; C. dephosphorus aluminum salt; D. nitrided mixture; E. treated slags; F. excess sludge; G. aeration of the aeration tank; H. purging and air supply of the membrane group; I. ventilation of the membrane pelvis; J. mixture; K. acidic detergent; L. standard water.

Detailed embodiments

Related to attached drawings, the technical solutions related to the utility model are further illustrated below.

Relating to 1 is a municipal wastewater disposal system with MBR composite membrane, comprising a coarse grid 1 , a lifting pump 2 , a fine grid 3 , a sand trap aeration basin 4 , a foil grid 5 , a biochemical AO-basin 6 , a central lift pump room and distribution well 7 , a reaction basin with MBR membrane 8th , a pump room for flowing back mixed fluid 9 , a pump room for drainage and integrated equipment room 10 , an ultraviolet disinfection trench 11 and a measuring room 12 which are connected in series, the reaction basin with MBR membrane 8th is designed as a cell membrane basin having the MBR membrane modules components with different bore diameters, and wherein the bore diameter 2 -50nm is;
the reaction basin with MBR membrane is still equipped with a water distribution system for membrane and basin.
a control system is also arranged to control the sludge concentration of the mixture, the membrane components, the turbulence as well as the flow of the outflow-suction pump in the reaction basin with MBR membrane;
a blower system for membrane and basin 13 is located in the reaction basin with MBR membrane and the biochemical AO basin 6 is also with a fan room 14 for aeration of the aeration tank G in the biochemical AO basin 6 equipped;

The treatment method is as follows: after the pretreatment of the municipal sewage A by a coarse grid 1 , a lifting pump 2 , a fine grid 3 and a sandpit 4 are obtained treated slags E issued. Then the liquid is through the foil grid 5 filtered and keeps small dirt on. After entering the biochemical AO-basin 6 the fluid settles in the biochemical AO-basin 6 denitrify under anaerobic or anoxic conditions and dephosphorylate. In addition, biodegradation and processing of the ammonia nitrogens in the aerobic state are completed. The outflow is through the central lift pump room and distribution well 7 evenly into the reaction tank with MBR membrane 8th delivered. The chemical agents such as carbon source B (eg, sodium acetate) and Entphosphorten aluminum salt C can be aerobic organisms degrade and separate from the membrane, in addition, remaining pollutants can be cleaned in soils. Through the blower system for membrane and basin 13 the ventilation of the membrane basin as well as the flushing process and the air supply of the membrane group can be carried out in the reaction basin with MBR membrane. Here are the pump room for flowing back mixed liquid 9 as well as the pump room for Wassrablauf and integrated equipment room 10 arranged. Through the ultraviolet disinfection trench 11 and the measuring room 12 standard water L is discharged or reused, with mixture J from the pump room for recirculating mixed liquid 9 into the aerobic reaction tank from the biochemical AO basin 6 flowing back. The excess sludge in the central lift pump room and distribution well 7 gets into the mud tank 15 discharged and then in the sludge dewatering room 16 deeply dried and peeled off. The nitrided compound D in the central lift pump room and distribution well 7 flows back into the hypoxic pretreated pelvis and hypoxic pelvis from the biochemical AO pelvis 6 ,

The reaction basin with MBR membrane 8th is equipped with a pump room for backwashing the membrane 17 equipped. The acidic cleaning agent K is for the backwashing of the pump room for backwashing the membrane 17 pumped liquid used. After backwashing, the liquid wastes flow into the reservoir of liquid waste with membrane backwashing 18 and can then be professionally recycled.

The present explanations are merely the relatively optimal embodiment of the utility model which does not serve to limit the present utility model. Within the scope of the utility model, any change, substitute, or improvement is to be confiscated within the concept and principles of the utility model.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• GB 189182002 [0002]

Claims (6)

Municipal wastewater disposal system with MBR composite membrane comprising a coarse grid, a lifting pump, a fine grid, a sand trap, a reaction basin with MBR membrane and a disinfecting component, which are connected in series, characterized in that a foil grid, a biochemical AO basin and a distribution well between the sand trap and the reaction basin with MBR membrane are sequentially arranged, wherein the MBR membrane reaction basin is designed as a cell membrane basin having MBR membrane module components with different bore diameters. Municipal wastewater disposal system with MBR composite membrane after Claim 1 characterized in that the bore diameter of the MBR membrane is 2-50nm; Municipal wastewater disposal system with MBR composite membrane after Claim 1 , characterized in that the reaction basin with MBR membrane is still equipped with a water distribution system for membrane and basin. Municipal wastewater disposal system with MBR composite membrane after Claim 1 , characterized in that a control system is also arranged to control the sludge concentration of the mixture, the membrane components, the turbulence as well as the flow of the outflow-suction pump in the reaction basin with MBR membrane. Municipal wastewater disposal system with MBR composite membrane after Claim 1 , characterized in that a blower system for membrane and basin in the reaction basin with MBR membrane is also arranged. Municipal wastewater disposal system with MBR composite membrane after Claim 1 , characterized in that the reaction basin is also equipped with MBR membrane with a system for backwashing the membrane.

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