TREATMENT OF WASTEWATER USING

PHOTOCATALYSIS

Sikder M Selimuzzaman

Outline

Introduction Methodology Discussion Conclusion

Introduction

Effuent of industry is a mixture suspended, dissolved organic and inorganic pollutants

The level of treatment

PrelemineryTreatment

(rags, sticks etc.)

PrimaryTreatment(ss,om,

etc.)

SecondaryTreatment

(bio-organicMatter, ss)

TertiaryTreatment(rss, Nutrient, etc)

Advance Treatment(DM, SS)

Effuent of industry

Some AOPs

OHCOOH 22pollutant

OHOH

OOHOOH

OOHOOH

uv

uv

2

2

32

22

232

2322

How OHo mineralize the pollutant ?

OHCOOH 22pollutant

How photocatalytic degradation (PCD) occur?

Photocatalytic degradation (PCD)

Lay out of the photoreactor

30cm

7 cm

Sampling Ports

Photoreactor during the experimental run

Results and discussion(Photocatalytic degradation of S2O3: Effect of UV light and TiO2)

Time (min)

0 100 200 300 400

S2O

3 (m

g/l)

0

20

40

60

80

100

120

140

160

180

200

220

S2O3 200 mg/l [UV and TiO2]

S2O3 200 mg/l [UV and no TiO2]

Figure: Photocatalytic degradation of S2O3 and corresponding formation of SO4

Time (min)

0 20 40 60 80 100 120 140 160 180 200

S2O

3, S

O4 (

mg

/l)

0

20

40

60

80

100

120

Degradation of S2O3 100 mg/l [pH 7]

Formation of SO4 [pH 7]

Conclusions and recomendations

No S2O3 can be removed either UV or TiO2 or both.

Solar light in place of UV light lamp can be used to reduce the pollutant

Thank you