HU188981B - Method for increasing the purifying capacity and/or efficiency of sewage treatment plants of biologic system - Google Patents

Abstract

The capacity and/or efficiency of biological waste water clarification plantsis increased by pumping the waste water in excess of the capacity of the plant and/or waste water contg. pollution in excess of the capacity of the plant into holding basins, treating the waste water in the holding basins opt. with oxygen, live mud or any known water purifying chemical, or the appropriate mixt. of these, and feeding the water from the holding basins back into the clarification plant proper as the load on the plant subsides. (Previously notified in week 8601)

Description

The present invention relates to a process by which the purification capacity of biological wastewater treatment plants can be increased in case of intermittent overloads and, if necessary, partial pre-treatment of wastewater can be achieved.

In the literature, there are several biological wastewater treatment systems operating in different ways in practice. The problem with all known systems is that they operate only at hydraulic and dirt loading with optimal cleaning efficiency at the load. retezték. However, the contamination of the amount of waste water varies greatly over time.

However, for economic reasons, wastewater treatment plants are not designed to meet the expected peak load. However, wastewater in excess of the nominal treatment capacity is not capable of being cleaned, and may even adversely affect the capacity of further treatment plants. The amount of pollutant in excess of the contaminant load considered during design also has the same effect, even if the hydraulic load does not exceed the value considered during design.

Otherwise, a sewage treatment plant can only handle less than its rated load if it consists of suitably chosen treatment plants connected in parallel.

It is an object of the present invention to increase the purification capacity and / or purification efficiency of a wastewater treatment plant, such that the wastewater treatment plant is capable of receiving higher loads at times than rated, with a small amount of investment. The present invention is based on the discovery that the amount of wastewater causing the overload can be stored in a compensation reservoir known per se in the hydrological field and should only be transferred to the wastewater treatment plant once its load has been sufficiently reduced. For long-term storage, the deterioration of wastewater can be prevented by adding oxygen, sludge or chemicals. _

The present invention thus provides a process for increasing the purification capacity and / or purification efficiency of biological wastewater treatment plants, wherein the wastewater is discharged to an equalization reservoir in excess of the capacity of the wastewater treatment plant and, optionally, oxygen, activated sludge and any known cleaning chemical. is added to the wastewater, and after the load on the wastewater treatment plant has been reduced, the wastewater in the equalization reservoir is discharged to the wastewater treatment plant.

X In a preferred embodiment of the process according to the invention, the sediment which is excellent from the waste water is discharged separately from the equalization reservoir, preferably to the sewage sludge treatment structure.

As can be seen, the problem of overloading of sewage treatment plants can be solved by using a. The introduction of oxygen into the wastewater prevents the formation of anaerobic conditions and the deterioration of the wastewater in the storage medium, thus allowing the wastewater to be stored for a longer period. Pre-treatment may also be carried out during storage if activated sludge containing the biological organisms involved in the decomposition is added to the waste water. A modern pre-purification stream may also occur during storage, namely settling a portion of the soap in a reservoir.

'A further advantage of the solution to indirectly csatlakoztatutt sewage treatment plant sewage system capacity is increasing by the reservoir of surplus wastewater it receives, and so does not take place in, ^{jvisszadiizzadás'>} occurring due ictcnségű and Ic flow time increase "bcrotliadás ”In the sewer network.

The process according to the invention is one possible embodiment. The flow path of her grazing mode is shown in the block diagram shown in her breast drawing.

The waste water from the sewer collector 1 is led to the distribution object 2. If wastewater, how much gc or deactivation. below the rated load capacity of the biological sewage purification system 3: the total amount of the distribution object 2 on the line 9. 3 biological wastewater treatment systems. The biological wastewater treatment system 3 includes all artifacts of the treatment technology including sludge slurry.

If the amount of wastewater or the contamination exceeds the rated load of the biological wastewater treatment system 3, the excess is transferred from the distributor object 25 through the conduit 4 to the equalization reservoir 5. In the equalization reservoir 5, oxygen is injected into the wastewater by means of the oxygen blower 12 to such an extent that anaerobic conditions cannot occur. '.

If pre-treatment is to be carried out, -a.3 activated sludge from the biological wastewater treatment system via line 7 is discharged into the wastewater in the equalization reservoir 5. In this case, the rate of oxygen delivery should be chosen so as to provide the oxygen necessary for the cleven sludge's activity.

When the amount of wastewater from the sewerage collector 1 falls below the rated load of the biological sewage treatment system 3, the stored and pre-treated wastewater from the equalization reservoir 5 through the pipeline 6, the distribution structure 2 and the pipeline 9 load should be optimal ·.

In the equalization reservoir 5, sedimentation of the contaminant begins. This fact provides a second possibility for the pre-treatment of the stored wastewater. Thus, when the wastewater from the equalization reservoir 5 is fed back to the biological wastewater treatment system 3, the higher pollutant content is also precipitated. This sludge is not recycled, but is led through the conduits 8 from the equalization reservoir 5 directly to the sludge treatment structures of the biological sewage treatment system 3.

From the biological wastewater treatment system 3, the treated wastewater is finally discharged through the conduit 10 and the sewage sludge 55 through the conduit 11.

Another primary purification option is the chemical treatment of the stored wastewater, which involves transferring the known cleaning chemical into the sewage sludge 5 simultaneously with the activated sludge.

Claims (2)

Claims. 1.) Procedure for biological system wastewater treatment; to increase the purification capacity and / or purification effect of the ponds to 2188 981, characterized in that the effluent is discharged to an equalization reservoir in excess of the capacity of the wastewater treatment plant and / or contaminated, optionally with oxygen. combined with sewage,. then reduce the load on the waste water treatment plant after that, the wastewater in the equalization reservoir is directed to the wastewater treatment plant, 2. The method of treatment of claim 1, wherein the sediment from the effluent reservoir is discharged separately, preferably to the sewage sludge handling structure. 1 drawing, 1 figure.