SU1638119A1 - Method for suppressing biological fouling in process water supply systems - Google Patents

Abstract

The invention relates to the field of protection of technical water supply systems against biological fouling. The aim of the invention is to increase the degree of inhibition of biological growth. The chemical reagent is introduced into water or iodmetilaty stirilpiridina iodmetilaty stirilhinolina or iodmetilat-4-stirilpiridina or iodmetilat-4-n-dimetilaminostirilpi- ridina or iodmetilat-4-stirilhinolina or iodmetilat-4-p- dimethylaminostyrylquinoline, preferably in an amount of 0.02-0.2 g / l. 1 hp f-ly, 1 tab.

Description

five

(L

The invention relates to the cleaning of biological fouling of structures, pipelines and heat exchangers of technical water supply systems, mainly circulating and closed water systems of industrial enterprises, by adding chemical reagents to the water.

sn3z

(CH3) 2

The purpose of the invention is to increase the degree of suppression of biofouling in technical water supply systems.

Styrylpyridine and quinoline iodomethylates are used as reagents for combating biofouling in water supply systems:

05

with oo

WITH

- iodomethyl 4-styryl pyridine

4-p-dimethylaminostyrylpyridine iodomethyl

CH-7 CH

I o

I (CH3);

These compounds are used individually at a concentration of 0.02-0.2 g / l.

To assess the bactericidal effect, technical water is taken in which 0.5-5 to 10 6 microorganism cells were contained in 1 liter of water. The microflora consisted of filamentous bacteria of the genera Leptothrix Cladothrix, aerobic bacteria Pseudomonas, Bacillus mycoides, etc., as well as sulphate regenerating bacteria. 10 ml of the initial water are poured into the test tubes, the solutions of the test substance are filled into them, obtaining an aqueous solution concentration of 0.2-, 0.4; 0.1, 0.05 and 0.02 g / l, two control tubes. After 5 hours of exposure, 1 ml from each tube is seeded in MPA and incubated for 48 hours in a thermostat at 27 ° C. Then, the number of microorganisms in comparison with the control was determined by the method of counting colonies and the effectiveness of bactericidal action was calculated.

The algaecidal efficacy of substances is evaluated by their effect on the oxygen productivity of algae. For this purpose, algae samples are taken from the circulating water supply system. The dominant forms in fouling were: green alga Cladophora glomerata, blue-green Lyngbya patealis., Diatoms: Navicula gracisis., Jomphonera parvulun, etc.

1 g of biomass of algae is interrupted on Chu-10 medium into oxygen flasks, in some of them solutions of the test substances are added in concentrations of 0.02-0.4 g / l and placed in

- 4-styrylquinoline iodomethyl

- 4-p-dimethylaminostyrylquinoline iodomethyl

0

five

0

50

five

0

five

luminostat After 5 h, oxygen is determined in the bottles by iodometric titration (according to Winkler). By comparing the amount of oxygen released in the bottles with the inhibitors and in the controls, the effectiveness of the algaecidal action of the inhibitors is evaluated. All experiments were performed in triplicate.

The results of laboratory tests for the study of the bactericidal and algaecidal action of the reagents and by a known method are presented in the table.

The table shows that the bactericidal and algicidal activity of the quaternary layers of pyridine and quinoline at a concentration of 0.1 g / l is higher than that of the known at a concentration of 0.2 g / l. The optimal effective concentration of biocides is 0.1 g / l, the desired effect is not achieved at lower values, and an increase in the dose is not advisable, since at a concentration of 0.1 g / l the effectiveness of the algaecidal action is 99.7-99.9%, bactericidal efficacy

97.8-100%.

Claims (2)

1. A method of suppressing biological fouling in technical water supply systems by introducing a chemical reagent into water, characterized in that, in order to increase the degree of inhibition, either iodomethyl-4-styrylpyridine or iodomethyl-4-p- is introduced into the water as a chemical reagent. dimethylaminosthenylspee5 .16381196 Ridin or iodomethylat-4-styrylquinos 2. The method according to claim 1 is different and with the fact that the chemical is realin or iodomethylat-4-p-dimethylaminosthenyl arylquinoline. pyridine CH CHIT SN3E 4-styrylquinoline iodomethyl (CH3) g omethyl-4-p-dimethylaminostyryl-quinoline Gent is introduced in the amount of 0.02-0.2 g / l, 75.4 86.2 98.7 100 100 71.5 83.3 97.8 99.8 100 78.0 88.2 99.8 100 100 72.3 84.6 99.9 100 100