BG64751B1 - Activator based on minerals for biological treatment plants - Google Patents

Abstract

The activator is used in biological (aerator) treatment plants as a dead catalyst. It is made of natural zeolite-clinoptilolite by atomization to fraction from 2 to 100 micro and has additionally modified foodstuff substances and enzymes. The activator operates simultaneously as a selective ion-exchanger of ammonium, microorganism immobilizer, activates and segregates the sludge, affects of process of rotting, reduces the sludge volume by from 30 to 50 %, reduces the amount of the ammonia from 9 to 2 mg/l, increases the time of rotting from 22 to 40 days and ensures the reduction of the organic part of the sludge from 49 to 35 %.

Description

The invention relates to a mineral-based activating and binding product for biological treatment plants.

The product is used in biological treatment plants to immobilize bacteria and segregate the sludge in the form of a catalyst, reducing the ammonium concentration by ion exchange.

BACKGROUND OF THE INVENTION

A number of methods are known for biological wastewater treatment and sludge treatment [2]:

- heterotrophic assimilation;

- dephosphatization;

- desulfatization;

- anaerobic sediment stabilization;

- detoxification.

The use of physical and chemical methods in the treatment of municipal water requires special attention, not only because of the limited capabilities of biological processes and the increasingly stringent requirements for the degree of treatment, but also because it is the only method for the final treatment of these waters. .

It is known to incorporate natural zeolites for wastewater treatment containing non-ionic surfactants / biofilm using biofilm formed by immobilized microbial cells on free-moving particles of clinoptilolite of 2 to 4 mm in size at a concentration of 15flo40g / dm ³ in contact with the bacterial suspension and the culture medium under static conditions at a contact time of 12 to 24 hours. The resulting mixture is aerated with periodic wastewater treatment [1].

SUMMARY OF THE INVENTION

The problem solved by the invention is to create an activating additive for biological treatment plants which, in the form of a catalyst, immobilizes microorganisms, activates the sedimentation process, coagulates and thickens the sludge, while simultaneously reducing the ammonium concentration by ion exchange.

The activator according to the invention is a natural aluminosilicate - clinoptilolite with a useful component content of 8285% and a particle size of 2 to 100 μ. The activator is additionally and selectively loaded with nutrients (dextrin) by mechanical mixing. The activator particles contain 50% micro- and macro-pores, saturated with nutrients.

The fixation of the micro-organisms present in the treatment plant basins is carried out during the purification process itself.

The actuator is fed prior to the inlet of the pool using a dispenser in an amount of 10 to 50 g / m ³ , the dosage being adjusted according to the amount of incoming waste water. The movement of the water results in a vortex with continuous updating of the layers. The biomass thus obtained, by reversing the sludge and continuously dosing the activator, leads to an increase in biological activity in the installation. The degree of purification is increased, the stability of the sludge deposition is improved, a high degree of compression is achieved, and the volume is reduced from 30 to 50%, which provides a longer stay in the decay reactor and, as a result, better septicity .

The advantages of the invention are as follows:

- the activator is not a biological pollutant, but an inorganic material used in all types of biological wastewater treatment plants

- decreases the ammonium concentration by direct ion exchange from 9 to 2 mg / l

- sludge particles in the source water decrease by about 45%

- sludge volume is reduced from 30 to 50%

- the silt rot time is changed from 22 to 40 days;

- there is no need to adjust the pH through boiling milk or sodium hydroxide. Nitrification is improved by 70-80%;

An exemplary embodiment of the invention

The essence of the invention is illustrated, without limitation, by the following examples:

Example 1. Immediately before the entrance of 5 biological wastewater treatment pools containing a large number of substrates and nutrients, a dry dispenser is installed for feeding and dosing the activator. The biological treatment of this type of water uses mixed cultures whose composition corresponds to the composition of the substrate and the conditions of cultivation. An activator having a particle size of 2 to 70 μ in an amount of 10 to 30 g / m ³ is fed into an aeration tank for biological treatment. The dosing is automatic depending on the amount of water supplied. A vortex layer is created which, by continuous updating, forms a filling biomass. A large number of floccens are formed around the activator grains to which microorganisms attach. The resulting increased floccene mass lowers the sludge index in the precipitator. Both muds of silt are reduced to 50%. The concentration of ammonium ions decreases from 9 to 2 mg / l.

Example 2. Worked as Example 1, but the medium contained an activator having a particle size of 70 to 100 μ in an amount of 30 to 50 g / m ³ . The sludge volume is reduced to 30%. The concentration of ammonium ions decreases from 9 to 4 mg / l.

Claims

Claims (1)

1. An activator for biological treatment plants containing clinoptilolite, saturated with nutrients, characterized in that the concentration of the useful component in the clinoptilolite is 82-85%, its particle size is from 2 to 100 μ and the concentration of the activator is from 10 to 50 g / m ³ .