SU1328308A1 - Method of removing organic fouling from waste water of microbiological industry - Google Patents

Abstract

The invention relates to the biological treatment of concentrated wastewater from bacterial preparations and can be used in the microbiological, medical, chemical and pharmaceutical industry. The aim of the invention is to increase the degree of wastewater treatment, improve the sedimentation properties of activated sludge, reduce sludge growth while simplifying and cheapening the process. Wastewater treatment is carried out under the following technological parameters: load on activated sludge 0.4-0.85 g BOD / g of desalt sludge per day; silt age is 10-25 days; activated sludge concentration 2.1-3.3 g / l. At the same time, deep sewage treatment is achieved up to a residual amount of BOD. 6 gmg / l, the removal of suspended solids decreases 1.7-2.3 times, the sludge index decreases 1.6-1.9 times and the specific increase in sludge doubles. Table 3. (L with: O5 N9 00 00

Description

The invention relates to biological% treatment of concentrated wastewater generated during the production of bacterial preparations of enzymes, antibiotics, amino acids, and can be used in microbiological, medical, pharmaceutical and pharmaceutical industries that dispose of sewage with an organic concentration equal to 700-4000mg / l by

PCRD „.

The aim of the invention is to increase the degree of wastewater treatment, reduce the growth of sludge and improve its sedimentation properties while simplifying and cheapening the process.

The method is carried out as follows.

The treated wastewater with MIC equal to 700-4000 mg / l, the primary settling mine, is subjected to aeration with active sludge with a load on sludge 0.40-0.85 gBPK / g ashless-day, sludge age 10-25 days and sludge concentration, equal to 2.1-3.3 g. Then the sludge mixture is separated by any known method (sedimentation, flotation, etc.), compacted sludge is returned to repeated aeration, the purified water is discharged into the reservoir.

Primary sedimentation in this method is excluded, since the presence in the effluent of organic suspended substances of microbiological origin leads to a rapid rotting of the settled suspension during the primary sedimentation.

Data on the effect of load on sludge on the quality of purified water (MIC), the removal of suspended substances and the value of sludge index are given in Table. one.

Data on the effect of sludge age are given in Table 1. 2

The results of studies of the effect of sludge concentration on the degree of water purification (BOD (, e) and removal of suspended substances are presented in Table 3.

Example 1. Wastewater from the production of a bacterial preparation of vitamin C with a military-industrial complex equal to 1165 mg / l, 55 minutes of primary settling, is subjected to aeration with active sludge at a load on sludge equal to 0.4 g of military-industrial complex / g of ash-free silt-day, age 25 day

and a concentration of 2.1 g / l. The resulting sludge mixture is separated by settling, and the compacted activated sludge is returned to aeration. The purified water has a MIC f, o, 15 mg / l, the removal of suspended solids 15 mg / l. The increase in activated sludge is 0.1 g / g of MIC with a sludge index of 50 CMVr.

Example 2. Wastewater from the manufacture of a vitamin preparation with a VPK fjp equal to 1165 mg / l is subjected to purification as in Example 1 with

sludge load equal to 0.55 g of MIC / g of ash-free sludge. day, age 15 days and sludge concentration 3.1 g / l.

Purified water has mg / l VPK. removal of suspended substances 10 mg / l.

The increment in activated sludge is 0.145 g / g of MIC with a sludge index of 30.

Example 3. Wastewater from the production of a preparation of vitamin C

25

 equal to 1165 mg / l, subjected

cleaning as in Example 1 with a load on sludge equal to 0.850 g of MIC / g of ash-free sludge, day, age 10 days and a concentration of 3.3 g / l.

Purified water has VPK 15 mg / l, removal of suspended substances 15.5 mg / l. The increase in activated sludge is 0.22 g / g MIC with a sludge index of 45 cm / g.

Example 4. Waste water from the production of carnetsin preparation with VPKdd, equal to 2280 mg / d, is subjected to purification as in Example 1 with - a load on sludge equal to 0.29 g VPK / g ash-free sludge. Day, 35 days sludge concentration 1.5 g / l.

The purified water has a MIC 25 mg / l, the removal of suspended substances 30 mg / l. The increase in activated sludge is 087 g / l of MIC with a sludge density index equal to 100 cm / g.

50

55

Example 5. Wastewater from the production of entomofluorine with VPK, equal to 3855 mg / l, is subjected to purification as in Example 1 with a load on sludge equal to 1.49 g of VPK / g of ash-free sludge t day, 5 days old and sludge concentration 3 , 6 g / l.

Purified water has a VIC of 30 mg / l. Removal of suspended substances of 26 mg / l. The increase in activated sludge is 0.30 g / g MIC with a sludge index of 120.

31

Claims (1)

Claims The method of purification of microbiological wastewater from organic pollutants, including aeration (hot water, followed by separation of the sludge mixture and returning the compacted activated sludge to aeration, characterized in that 283084 purification of waste water, improvement of the sedimentary properties of activated sludge, reduction of sludge growth while simplifying and cheapening the process, aeration is carried out with a load on activated sludge of 0.40-0.85 g BOD “pd” per 1 g of ash-free sludge per day, age silt 10-25 days. and activated sludge concentration of 2.1-3.3 g / l. ten Table 1 Table Compiled by G. Lebedeva Editor N. Gunko, Tehred M. Khodanich Proofreader A. Tsko Order 3446/25 Circulation 850 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Manufacturing and printing company, Uzhgorod, st. Project, 4 Table3