SU929588A1 - Method of treating effluents - Google Patents

Description

(54) METHOD FOR PROCESSING WASTE WATER

The invention relates to the protection of the environment, mainly to the treatment of industrial wastewater sent for disposal, and can be used to disinfect them. A known method of treating water with mercury sulfide and bromoacetic acid benzyl ester provides disinfection only from heterotrophic forms of microorganisms. However, the use of mercury sulfide for treating water is complicated by its high toxicity. The closest to the invention in its technical essence and the achieved result is a method of treating wastewater by introducing a chemical reagent, which is chloramine 21 as used. The disadvantage of this method is that chloramt B suppresses the toxicity of only one physiological group of microorganisms - denitrating bacteria, and also contributes to the creation of aggressive sediments, thereby increasing the corrosion of metal equipment. The purpose of the invention is to suppress the viability of denitrifying sulfate reducing, thionic, sulfur bacteria and iron bacteria, thereby reducing the corrosion of metal equipment. This goal is achieved in that, according to the wastewater treatment method, hydrochloride-N-mtil-K (diethnlaminoethyl) amide di (VI-CE-phenyl) glycolic acid is used as a chemical reagent. Moreover, the hydrochloride .. H-methyl-H (diethylamino-etip) amide di (ft-C. C: enyl) glycolic acid is administered in an amount of 10-25 mg / l. Example 1. By a known method). Chloramine B in the amount of 2.6 and 8 mg / l was grown into wastewater contaminated with denitrifying bacteria. The results of the study are presented in Table. 1. Thus, this drug (Table 1) acts as a bactericide against denitrifying bacteria under conditions of this water. The growth of bacteria cells stops after 2 hours of contact at a concentration of chlorine min B 6 and 8 mg / l (active chlorine) and after 24 hours, 1 phi concentration of 2 mg / l (active chlorine). In the process of treating waste water with this preparation, residual chlorine is released in concentrations of 1.5 mg / l, 5.3 mg / n and 75 mg / l. chlorine gives reason to believe that chloramine B activates the corrosive process, since residual chlorine is oxide in a water system, it forms salt kiolot. Example 2 In a wastewater containing denitrifying, thionic iron bacteria, sulfur bacteria and sufat-reducing bacteria, the proposed inhibitor is administered in mg / l and monitored for bacterial growth after 6.24 and 48 hours The results of the research are presented in Table The data in Table 2 show that complete disinfection of wastewater is achieved after 48 hours at a concentration of 10 mg / l, and after 24 hours at a concentration of 5 mg / l. The experimental data for the determination of the rate of corrosion and the degree of protection against corrosion are shown in Table. 3. Steel plates are placed in vessels with field waters. In experimental chlorine 7.5 mg / l

Also

same

No colonies, residual chlorine 5.3 mg / l

Single

same

No colonies, residual chlorine 1.5 mg / l. Colonial variants are administered hydrochloride / | -methyl-H (diethylaminoethyl) amide di (I C-phenyl) glycolic acid at a concentration of 5 mg / l. The experience lasts 10 months. (tab. 3). The npenapaV used in izofethenia has an anticorrosive effect, i.e. The degree of corrosion protection is 8.9% (Table 3). The proposed reagent (hydrochloride |) || -methyl-L- (diethylaminoethyl) amide di (i-Seb-Phenyl) glycolic acid) has a very strong antibacterial activity in relation to the microflora of industrial wastewater (denitrifying, sulfate-reducing substances, and new syrup; ) and is a corrosion inhibitor, i.e. reduces (corrosion metal corrosion by comparison with the known, which activates the corrosion process. Technical and economic advantage of using N-methyl-L (diethylaminoethyl) amide hydrochloride di (and -CC-phenyl) glycolic acid during the injection of industrial wastewater from oil and gas the fields consist in preventing bacterial contamination of field waters and rocks, reducing biocorrosion processes and extending the service life of oilfield equipment, and also preventing reduction of reservoir permeability products and improve the quality of produced water., Table

 Den itrifying +++

Thionic:

++

++++ Note: +++ is a good height, ++ “1sheets, no growth.

Higher corrosion,

Inhibitor, mg / l

N-MethylN (diethylaminoethyl) amide hydrochloride, di {Y-C6-phenyl) g, Liquidol acid (5O)

Without inhibitor: commercial runoff

bacterial runoff

Table 2

+++

+ +

Table 3,

Zag / m h degree,%

80-93

Oh, O08

0.0410 0.144 pronounced growth, + - single

79295888

Claims (2)

Invention Formula 2. The method according to p. 1, differ1. The method of treatment of waste water put-N (diethlaminoethyl) amide di (And, by the introduction of a chemical reagent, about t-CI-phenyl) glycolic acid is introduced kicking with the fact that, with the aim of 5 in the amount of 1O-50 mg / l. suppression of harmful biochemical pro-. life related processes sources of information denitrifying, sulfate-reduced, taken into account during examination thionic, sulfur bacteria and iron bacteria, as a chemical pea-O1. USSR author's certificate genes use hydrochloride-N-methyl- No. 242136, cl. C O2 C 1/40, 1966. (diethylaminoethyl) amide di (I-CE -2. USSR author's certificate Yunil) glnkopevoy acid.N 160682, CL. C O2 C 1 / 4O, 1962. with hydrochloride - N-Me