Small treatment plants

AT8-50

Wastewater treatment plants

AT75-AT20000+

Assembling of the WWTP

Assembling

Service WWTP

Service

The company obtained the National Technical Approval NTL-01-050:2008 „Wastewater treatment plants. Factory and (or) on-site domestic wastewater treatment plants over 50 GE“, which is mandatory for the supply of typical plants to the market from the Certification Centre of Building Products (SPSC) on 27th August 2008. The mentioned Approval specifies that AT type (AT-75, AT-100, AT-120, AT-150, AT-200, AT-250) wastewater treatment plants (biological reactors) have been designed in accordance with the design rules laid down in the legislative acts.

AT biological reactors (hereinafter – bioreactors) are on-site aerobic continuous-flow wastewater treatment plants factory produced from extrusive polypropylene with active sludge for biological removal of organic pollutants (BDS and ChDS), nitrogen and phosphorus from household and industrial wastewater, which chemical compositions are similar.

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MODELIS

POPULATION

EQUIVALENT

DAILY LOAD

WITH CONTAMINANTS

(kg BOD5)

DAILY FLOW

(m³/day)

SLUDGE PRODUCTION (m³/year)

EL. ENERGY CONSUMPTION

(kWh/day)

TECHNICAL

PARAMETERS

Min.

Max.

H(mm)

A(mm)

B(mm)

C(mm)

D(mm)

E(mm)

Reactors

(psc)

 AT-60 Oval  20 60   3,6 10,1   18  3000

Lenght-3200

Width-2300

2880  2650  50-200  200 
 AT-75 Oval 25   75  4,5  11,3  13,7  18  3000  Lenght-3600

Width-2300

 2880 2690  50-200   200
 AT-100 Oval  30  100  6  15  18,3  24  3000

Lenght-3200

Width-2300

 2880  2500 50-200  200   2
 AT-120 Oval  40  120  7,2  18  21,9  24  3000  Lenght-3200

Width-2300

 2880  2650 50-200  200   2
 AT-150 Oval  50  150  9  22,5  27,4  24  3000 Lenght-3600

Width-2300

 2880  2690 50-200  200  2

AT-75

25

75

4,5

11,30

13,7

18 3000

3250

2880 2690 50-200

200

AT-100

30

100

6

15

18,3

24

3000

3500 2880 2690

50-200

200

AT-120

36

120

7,20

18

21,9

24

3000

4000

2880

2690

50-200

200

 1

AT-150

45

150

9

22,50

27,4

24

3000

4500

2880

2690

50-200

200

 1

AT-200

60

200

12

30

33,7

36

3000

5000

2880

2690

50-200

200

 1

AT-250

75

250

15

37,50

42,1

36

3000

5300

2880

2690

50-200

200

 1

AT-300

100

300

18

45

50,5

48

3000

5500

2880

2690

50-200

200

 1
AT-400  120  400  24  60 67,4  72  3500  6100  3340  3120 50-200 200  1
 AT-500  150  500  30  75  84,2  72  3000  5300  2880  2690 50-200  200  2
 AT-600  180  600  36  90  101,1  96  3000  5500  2880  2690 50-200   200  2
 AT-750  225  750  45  112  126,3  108  3000  5300  2880 2690 50-200   200  3
 AT-800  240  800  48  120  134,8  144  3500  6100  3340  3120 50-200   200  2
 AT-900  270  900  54  135  151,6  144  3000  5500  2880  2690 50-200   200  3
 AT-1200  360  1200  72  180  202,2  216  3500  6100  3340  3120 50-200  200
PARAMETER

 Cleaning

efficiency (percentage)

Cleaning

efficiency (concentration)

Average Maximum Average Minimum
 COD  91,7%  95,6%  51,8 mg/l  36 mg/l
 BOD5  97,0%  98,4%  10 mg/l   5 mg/l 
 SS 97,0%  98,0%   12,1 mg/l  9 mg/l 
 N-NH4 98,6%  99,7%   0,8 mg/l  0,2 
 Ntotal 80,7%  91,1%   14,8 mg/l  10,8 mg/l 
 Ptotal 75,6%  89,0%   3,3 mg/l   1,3 mg/l 

A bioreactor consists of anaerobic – anoxic, aeration zone and secondary sedimentation tank.

All zones are installed in a single horizontal repository of cylindrical shape and are separated by walls. By means of the air blower the excess sludge is removed into sludge stabilizer, which is mounted in a separate repository.

The treatment unit includes an air blower mounted next to the plant.The shape, configuration, arrangement of treatment stages and equipment of bioreactors installed are analogous to all AT75 – AT400 models. Along with the increase in the capacity of bioreactors, the corresponding structural parameters of the equipment are increased.

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Municipal VFL wastewater treatment plant AT300 – AT5000 is capable of servicing cities, towns with a large and small number of citizens: from several hundred up to over five thousand citizens. Our project covers all levels of biological treatment and sludge sedimentation in the integrated reactor. It reduces the dimensions of the plant and simplifies construction works. The tankages of AT1000 – AT5000 bioreactors must be produced from reinforced concrete, whereas partitions can be installed from polypropylene.

 

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VFL technology bioreactor contains integrated all levels of biological treatment and sludge sedimentation (anaerobic – anoxic, aeration zone and secondary sedimentation tank). All zones are installed in the aerotanks of rectangular shape, which base is made from concrete and partitions – from polypropylene.

LAs compared to the traditional treatment methods, VFL technology is superior to both space and energy efficiency. Treatment system is flexible as the duration of all treatment stages can be easily changed and adjusted. The treatment plants of this type are fitted for treatment of unequal and varying wastewater debits and loads.

Type

NUMBER

OF REACTORS

(psc.)

DAILY LOAD

WITH CONTAMINANTS

(kg BOD5)

DAILY FLOW

(m³/day)

SLUDGE PRODUCTION (kg/day)

EL. ENERGY CONSUMPTION

(kWh/day)

TECHNICAL

PARAMETERS

Min.

Max.

LENGHT

(m)

WIDTH

(m)

HEIGTH

(m)

AT-1000

1

4

60

150

30

144

11

9

3,5

AT-1500

1

6

90

225

45

195

12

9

4

AT-2000

1

8

120

300

60

260

13

10

4

AT-2500

1

10

150

375

75

300

12

12

4,5

AT-3000

1

12

180

450

90

360

13

13

4,5

AT-3500

1

14

210

525

105

421

14

13

4,5

AT-4000

1

16

240

600

120

481

18

12

4,5

AT-4500

1

18

270

675

135

534

18

13

4,5

AT-5000

1

20

300

750

150

587

20

13

4,5

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