SU1629073A1 - Method of compacting active sludge - Google Patents

Abstract

The invention relates to water supply and sewage and can be used at biological wastewater treatment plants. The purpose of the invention is to reduce the final moisture content of the compacted activated sludge and reduce the cost of the method. To do this, in the method of compaction of activated sludge, which includes compaction in a sludge compactor, activated sludge is compacted in two stages; within 6.5-7.0 hours. 1 table.

Description

with

with

The invention relates to water supply and sewage and can be used at biological wastewater treatment plants.

The purpose of the invention is to reduce the final moisture content of compacted activated sludge and reduce the cost of the method.

Example. The study is subjected to a suspension of activated sludge with an initial moisture content of L / Ref 99.6%. The initial suspension is fed to the first compaction stage in a column of mm, 0 m and is maintained until various values of volume concentration a in the sediment layer are reached. The precipitate is then pumped into a series of standing mm columns and is maintained for various periods of time (5.5-8.5 hours). At control intervals of 0.5 hours, a precipitate sample is taken to determine the final moisture content.

Data on the effect of volume concentration depending on the compaction time

The second stage on the humidity of compacted activated sludge is given in the table.

As follows from the above data, when the volume concentration is 1 and the compaction time in the second stage of the Huple is 6.5 hours, the moisture content of the compacted activated sludge increases in comparison with the known method; At a 1 25 there is no decrease in humidity in comparison with its values at a 1.1 -1.25. Retention of sludge in the first stage of consolidation to a. 1.25 leads to an increase in the volume of the primary sealant, and consequently, to an increase in processing cost.

Keeping the sludge in the second stage over 7.0 hours does not lead to a decrease in the final humidity, but at the same time the required volume of the structure increases, which also increases the processing cost

F o rumlula and z o breetn

A method of compaction of activated sludge, which includes a packing in a seed compactor,

o you o oh so

characterized in that, in order to reduce the cost and reduce its final moisture, activated sludge is compacted in two stages;

the averaged value of the volume concentration and 1.1-1.25, then is pumped into another silt compactor and kept there for 6.5-7.0 hours.

Claims (1)

Claim A method of sealing activated sludge, including sealing in a sludge compactor. 1629073 A1 characterized in that, in order to reduce the cost and reduce its final moisture, activated sludge is compacted in two stages, at the first stage they are kept to an average volume concentration a = 1.1-1.25, then pumped to another sludge compactor and kept in him for 6.5-7.0 hours Way a Sludge humidity,%, at compaction time, h 5.5 6.0 6.5 7.0 7.5 8.0 8.5 Offers 1.05 97.50 97.45 97.40 97.45 97.40 97.47 97.43 gay * b / 1.10 97.46 97.60 96.20 96.18 96.15 96.17 96.17 -Λ /? · '· »· 1.15 ... / 97.52 97.55 96.18 96.16 96.16 96.18 96.17 A 1.2Q, 97.54 97.35 96.15 96.15 96.15 96.14 96.15 1.25 97.50 97.40 96.17 96.13 96.17 96.16 96.15 1.30 97.48 97.45 96.20 96.17 96.14 96.18 96.16 Famous 1.35 97.46 97.40 96.20 97.3 96.17 96.16 96.20 96.18 Compiled by E. Wojciechowska Editor A. Kozoriz Tehred M. Morgenthal Corrector O. Kravtsova Order 398 Circulation 440 Subscription VNIIG1I of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR '113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.