SU1227604A1 - Method of ferment stabilization of organic deposit - Google Patents

Description

The invention relates to methods for enzymatic stabilization of organic sediments, in particular sludge.

Aerobic and anaerobic methods are known for treating organic sediments. With aerobic methods, the treated sediment is aerated to ensure microbiological processes of destruction that take place only in the presence of oxygen. The time lag of the source material is 2.5-7 days.

Anaerobic methods require significantly more time. They flow in the absence of oxygen. The settlement time is 30-70 days (see I, S. Turovsky. Sludge treatment. M. Stroyizdat, 1975, p. 32-35). The closest to the proposed technical essence and the achieved result is a method of enzyme stabilization of sludge, including the introduction of a mixture of enzymes containing amylase, protease, glucanase, into the original sludge, mix- ing. and holding at 25–40 C. pH 5–8 for 5–10 h, followed by separation into stabilized SP and sludge water (see GDR Patent No. 140244, class C 02 F 11/12, 1978).

The aim of the invention is to increase the degree of stabilization and reduce the need for enzymes.

The method is carried out as follows.

Sediment stabilization is carried out by introducing a mixture of enzymes and, in the cation complexing agent, disodium dihydrogen ethylene diamine tetraacetate. The mixture is stirred and maintained at a temperature of preferably 10-50 ° C pH 5-8, for preferably 0.5-15 hours. The complexing agent is preferably introduced in the amount of

Compiled by G. Lebedeva Editor N. Gorvat Tehred N. Bonkalo

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VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. , 4/5

Production and printing company, Uzhgorod, st. Project, 4

3

35-70% of the amount of enzyme. The mixture is divided into stabilized sludge and sludge water. The consumption of enzymes is significantly reduced.

Enzymes and complexing agents are used primarily for mixtures of 1-1. HEW, consisting of primary and active sludge.

The amount of enzymes is reduced by approximately 90% compared with the method of enzymatic stabilization of sludge without a complexing agent.

PRI im p The primary sludge freed from coarse impurities is mixed with an excess of 1: 5 biological purification process, a mixture of enzymes containing amylase, protease, glucanase at the rate of 0 per m 3-10 g and the complexing agent disodium dihydrogen ethylene diamine tetraacetate in the amount 35-70% of the amount of the enzyme is mixed - and kept at 25 C for 5 hours with weak S aeration followed by gravitational separation into stabilized 1-sh and 1show water.

The stabilized sludge is transferred to a sludge drying platform. The nutrient-containing water is either used for special purposes or is converted to an aeration tank.

When adding 0.5 g of complexing agent / kg of solid sediment, the amount of enzyme is reduced by 4 times. If we take the decomposition of organic matter without the complexing agent for 100%, then the decomposition with the complexing agent is 170%.

The resistivity of the filtration of stabilized sediment without comp (2

lex former 0.5-3-10 cm, and with complexing agent 0.1 0

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2 1

12

CM

Proofreader S. Shekmar

Claims (3)

1. METHOD FOR ENZYMATIC STABILIZATION OF ORGANIC SEDIMENT, including the introduction of a mixture of enzymes containing amylase, protease, glucanase, mixing and maintaining at a temperature of 25-40 ° C, pH 5-8 for 5-10 hours, followed by separation into stabilized sludge and silt water , characterized in that, in order to increase the degree of stabilization and reduce the need for enzymes, a complexing agent, disodium dihydrogen ethylenediamine tetraacetate, is introduced into the mixture of sediment and enzymes, 2. The method according to claim 1, characterized in that the mixture is kept at a temperature of 10-50 ° C for 0.5-15 hours 3. The method according to claims 1 and 2, characterized in that the complex § educator is administered in an amount of 35-70% of the amount of the enzyme " SU ,, „1227604