SU1244112A1 - Method of biological purification of waste water - Google Patents

Description

I

The invention relates to methods for the biological treatment of industrial wastewater rich in organic matter, and can also be used for the treatment of wastewater from livestock farms.

The aim of the invention is to increase the degree of purification and simplify the process.

The feasibility of using the proposed plants in the complex is explained by the fact that these plants occupy the thickness of the water layer, namely, Cladophora glomeratu is attached to the bottom of the storage pool, then Chaetomorpha 1 inum Kutz and Hydrodictyon reticulatum

With macroscopic algae 1: 1: 1, the process of wastewater treatment proceeds in the shortest possible time and with the maximum cleansing effect. These algae develop in different; water layers, as they relate with respect to the intensity of illumination to different ecological groups, the Hydrodictyon reticulatum grows in the uppermost water layers. It is not expedient to increase its share in the inoculum, since the development of the other two types of algae is disturbed and purification will take place only at. top layer of water. In addition, these three types of algae have approximately the same growth-a rate and, with their equal ratio in the inoculum, they develop evenly and do not suppress each other. The exclusion of one of them or the taking up in a smaller amount leads to the fact that water stratification occurs in a biological pond: in one layer the wastewater is purified more quickly, and in the other - slower. As a result, the degree of purification at the outlet of the biological pond is reduced.

II p im. This mixture of algae is inoculated into a flow biopic after the aerotank with a length of 1250 m and a thickness of water of 0.70

The amount of inoculum is K), 21 g / l of dry weight with a ratio of 1: 1: 1 & algae. namely: N. reticulatum Zagerh CAHJ-783 in the amount of 0.07 g / l dry weight; Cladophora glomerata

VNIIPI Order 3766/24 Circulation 864 Subscription Proizv.-poly. pr-tie, Uzhgorod, st. Project, 4

12-2

and, 07 g / l dry weight and Chaetimorpha

1inum Kutz 0.07 g / l.

Production and domestic wastewater at the entrance to the biological pond have the following composition:

K „,;„ 19,7 mg / l

 7.3 mg P Oh, / l

COD 123.9 mg O / L

Rn 7,6

After 6 days (the time of passage of wastewater through the biological pond), the water is purified by nitrogen to 92.4%, by phosphorus to 76.7%, by CCK to 90.0%.

The number of microbial heterotrophs is significantly reduced. The coli titer increases (from 0.00004 to 0.0111), and the Perringens disappears from the wastewater.

.At the end of one cycle, part of the algae from the pond is removed. In order for the inoculum density to become equal to the initial one.

Comparative data from the prototype are given in the table.

COD, degree of purification,%

MIC., Ct61, 0

90.0

The proposed method does not require the use of carbon dioxide, since the algae complex used promotes the mineralization of organic substances and thus provides carbon dioxide gas, and there is no need to use centrifuges due to the fact that the algae are large and easily separable from the culture. liquids, for example, rakes, mesh nets with a diameter of 1 cm.

Claims (3)

1. METHOD FOR BIOLOGICAL WASTE WATER TREATMENT, including the introduction of aquatic plants and the separation of algae biomass from the culture fluid, characterized in that, in order to increase the degree of purification and simplify the process, the purification is carried out in biological ponds with a mixture of macroalgae Hydrodictyon reticiil atum, Lagerh CALU- 783, Cladopnora glomerata, Chaetomorpha lirium Kutz, taken in equal proportions. 2. The method of pop. 1, with the fact that the mixture of macroalgae is introduced in an amount of 0.150.30 g / l of dry weight. 3. The way popp. 1 and 2, about l and q, characterized in that the separation of the algae biomass is carried out by a rake, wire mesh with a mesh diameter of 1 cm.