biocos meusel_sbr

8/13/2019 BIOCOS meusel_SBR

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Bauhaus-Universit Weimar

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Sludge Settling Processes in SBR-SewageTreatment Plants

According to theBiocos-Method

Dipl.- Ing. Sten Meusel


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Forecast

Peculiaritiesof the sludge sedimentation

andproblematic operating conditions

observed inthree-phase-Biocos-plants

Peculiaritiesof the sludge sedimentation

andproblematic operating conditions

observed in

three-phase-Biocos-plants


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Outline

1. Motivation of Investigation

2. Methods and Material

3. Results4. Summary


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1. Motivation of Investigation

Few availableempirical data

about sludgesettling processes

in Biocos-plants

Few availableempirical data

about sludgesettling processes

in Biocos-plants

Improvement of the Biocos-method

concerning theoperatingefficiency

Improvement of the Biocos-method

concerning theoperatingefficiency

Bauhaus-University

Weimar

Bauhaus-University

Weimar

Company of Biocos-plantconstructions

Company of Biocos-plantconstructions


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SU 2 SU 1

Biological reactor

WWTP Buchbach(Capacity 1,200 PE)

WWTP Buchbach(Capacity 1,200 PE)

Q in= 0...5 L/s or 10 L/s

Design MLSS B = 5 g/L


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Mixing phase U (15 min)Mixing phase U (15 min)

Q in

Longitudinal Section

Plan View

B SU 1

B

SU 1

SU 2

Q in


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Settling phase V (45 min)Settling phase V (45 min)

Q in


Plan View

B SU 1

B

SU 1

SU 2

Q in


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Qout

Qout


Discharge phase A (60 min)Discharge phase A (60 min)

Q in


Plan View

B SU 1

B

SU 1

SU 2

Q in


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Focal points of the investigations in the SU-reactor:

Definition of the sludge level courses Definition of the solid distribution

Measuring instrument:

Infrared light turbidity sensor ( CUC 101, Endress+ Hauser) Total solids (TS) in g/L

Arrangement of measurement points (Units in m):

Length = 8.0 m

Width = 3.5 mMax water depth = 4.5 m

l


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3. Results

Sludge levels during the Settling phase V:

Time during V-phase [min]

Calculated sludge settling rates (SSR):

0

0,5

1

1,5

2

2,5

3

3,5

4

250 300 350 400 450 500 550 600Vergleichsschlammvolumen VSV [ml/l]

A b s e t z g e s c h w i n d i g k e i t [ m / h ]

Merkel (1971)

Resch (1981)

ATV-M 210 (1997)

Kayser (1995)

Absetzgeschwindigkeiten der Profillufe

Absetzgeschwindigkeiten der manuellenMessungen

250 300 350 400 450 500 550 600Sludge volume SV30(SU) [mL/L]

Merkel (1971)

Resch (1981)

ATV-M 210 (1997)

Kayser (1995)

Measured settlingrates

MLSSSU

= 5.54 g/L SV 30,SU = 510 mL/L

MLSS SU = 5.04 g/L SV 30,SU = 440 mL/L



0 5 10 15 20 25 30 35 40 45

43.5

3

2.52

1.51

0.50

S l u d g e s e

t t l i n g r a

t e

[ m / h ]

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4 D e p

t h o

f s l u d g e

l e v e

l [ m

]


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3 R lt


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3. Results

Longitudinal profiles of the solid matter distribution in the SU-reactor

V-phase(after 45 min)

V-phase(after 45 min) MLSS SU = 5.3 g/LMLSS SU = 4.1 g/L

0 0.5 1.51 2.52 3.53 4.54 5.55 6.56 7.57 8

52 8

1

4.5

4

3

3.5

2.5

1.5

2

0.5

0

Klarwasserzone

TS= 0

Absetzzone

1 2 3 4 5 5.25 6

Eindickzone

7 8 9 1110 12 13 g/l

0

1

2

3

4

0 1 2 3 4 5 6 7 8[m]

Clear water zone

Separationzone

Compressionzone

TS = 0 1 2 3 4 5 5.25 6 7 8 9 10 11 12 13 [g/L]

40 210.5 1.5 32.5 3.5 54.5 5.5 6.56 7.57 8

2

2.5

4.5

4

3

3.5

1

2

1.5

0.5

0

5 9

TS= 0 1 32 4

Klarwasserzone Absetzzone Eindickzone

75.285 6 8 9 10 13 g/l1211

0

1

2

3

4

0 1 2 3 4 5 6 7 8[m]

Clear water zone

Separationzone

Compressionzone

TS = 0 1 2 3 4 5 5.28 6 7 8 9 10 11 12 13 [g/

Break pointconcentration

Break pointconcentration

3 R lt


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3. Results

A-phase(after 55 min)

A-phase(after 55 min) MLSS SU = 5.3 g/LMLSS SU = 4.1 g/L

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7

2 5

4

7.5 8

4.5

2.5

3.5

3

2

1.5

8

0.5

1

0

10 0.5

2

87.576.565.554.543.532 2.51.5

0

0.5

1

2

2.5

1.5

3

4

3.5

4.5

5 9

Klarwasserzone

TS= 0

Absetzzone

1 2 3 4 5 5.25 6

Eindickzone

7 8 9 1110 12 13 g/l

0

1

2

3

4

0 1 2 3 4 5 6 7 8[m]Clear

water zone

Separationzone

Compressionzone

TS = 0 1 2 3 4 5 5.25 6 7 8 9 10 11 12 13 [g/L]TS= 0 1 32 4

Klarwasserzone Absetzzone Eindickzone

75.285 6 8 9 10 13 g/l1211

0 1 2 3 4 5 6 7 8[m]Clear

water zone

Separationzone

Compressionzone

TS = 0 1 2 3 4 5 5.28 6 7 8 9 10 11 12 13 [g/L

0

1

2

3

4

3 Results


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3. Results

Concentration interchange of the Mixing phase U

Problems of concentration

equalisation measured

(MLSS SU > MLSS B)

Problems of concentration

equalisation measured

(MLSS SU > MLSS B)

B S

U

Internal sludgecirculation in the SU-

reactor

Internal sludge

circulation in the SU-reactor

Interchanging rate of the recirculation pump

= 1.2 SU-reactor content

MLSS B 4 g/L

Difference atboth inflow

types

MLSS B 5 g/L

Difference onlyduring storm

water inflow

3 Results


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3. Results

Four-phase-Biocos-methodMixing phase + Sludge recycle phase

Four-phase-Biocos-method

Mixing phase + Sludge recycle phase

Q out

Q in


Plan View

B SU 1

B

SU 1

SU 2

Q in

Sludge recycling pumpSludge recycling pump

4 Summary


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4. Summary

Results of investigation:Results of investigation:

2. During the Discharge phases:Sludge levels depending on the difference between

sludge settling rate and surface overflow rateSolid matter distribution comparable to layer formations insecondary clarifiers with vertical flow

1. During the Settling phases: Almost linear sludge level decreases depending on sludge volum Settling processes analogue to well-known hydraulically uninterrupted settling processes

Intention of investigation:Intention of investigation:

Determination of solid matter distribution and sludge levelduring the Settling and Discharge phases

3. Problematic concentration interchange during theCirculation phases Four-phase-Biocos-method


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Backup slide 1


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Backup slide 1

Measuring instrumentMeasuring instrument

Microprocessor with display

Stepper motor

Cable drum

Turbidity sensor

Optoelectronical measuring system CUC 101 (Endress + Hauser)

Sensor in stop-positionSensor in stop-position

Endress + Hauser 2004

Backup slide 2


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Backup slide 2

Measurement arrangementMeasurement arrangement

Measuring No. 1 2 3 4 5 6 7 8 9

Phase V V V V A A A A A

Time after phase start 8 min 19 min 30 min 40 min 12 min 23 min 34 min 44 min 55 min

Defined measuring intervals of the test series

Measuring platforms with the 10 measurement points

Backup slide 3


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ac up s de 3

Dimensioning of the Biocos reactorsDimensioning of the Biocos reactors

Biological reactor Biological reactor

solids suspended liquor mixed Designage sludge Designproduction SludgeloadingBOD Volume 5

SU-reactor SU-reactor

solidssuspendedliquor MixedindexvolumeSludgeL/m/h)(675rateloadingsurfacevolumeSludge

rate settlingSludge

rate settlingSludgeinflowwater Storm

areaSurface

biocos meusel_sbr

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