1. Course
Industrial Water and Waste Treatment
Course Instructor
Professor Dr. M. Habibur Rahman
Prepared by
Farhana
Fauzia Sultana
Md.Mezanur Rahaman
Student ID# 1014042502
Department of Civil Engineering, BUET
Wastewater Treatment
in Pharmaceutical Industries

2. • One of the leading pharmaceutical manufacturers in
Bangladesh
• Situated on a 12-acre site, located in Mirpur, Dhaka
• Manufactures and markets about 300 human
pharmaceutical and about 95 animal health products
Renata Limited: Profile
• General products
• Sachet filling
• Cephalosporin
• Penicillin
• Potent products
• Operates five manufacturing
facilities

3. Products and Raw Materials
Types of products
• hormones
• contraceptives
• anti-cancer drugs
• oral preparations
• conventional drugs
• consumer goods
Forms of products
• Tablets and Capsules
• Dry syrups
• Sterile dry and liquid fills
• Sachet filling
• Soft and liquid gels
Raw materials
• organic and inorganic chemicals of high purity
- excipients
- active pharmaceutical ingredients (API)
- packaging
• highly purified water

4. Water Treatment Plant
• Water treatment plants (WTP) at each of its facilities
• Maintained at full automation system
• Capacities: Pretreatment system: 1000 l/hr; Generation system: 600 l/hr
• Regular monitoring of WTP parameters
• Parameters Monitored at the Inlet:
pH, conductivity, total hardness, alkalinity,
turbidity, CO2, Iron content, Silica content
• Parameters Monitored at the Outlet:
microbial count, pH, conductivity, Nitrate,
heavy metal, oxidisable substances, TDS,
Chloride, Sulphate, total hardness,
Ammonium, free Chlorine

5. Wastes and Wastewater Generation
Waste type Constituents Treatment/Disposal
Released in the
atmosphere
Air emissions resulting from
incineration of solid wastes
Gaseous waste
ETP; discharged in
public sewer
• ~1% (or less) of raw materials
• small amounts of H2SO4,Ethanol,
NaOH, Acetone, HNO3, H2SO4, NaCl
• heavy metals
• oil and grease
Liquid waste
Sludge IncinerationSolid waste

6. Wastewater Quality and Treatment
• All parameters within Bangladesh Standards for Industrial
Effluent Water discharged in inland surface water except
BOD5, COD, DO, Electric Conductivity, Oil & Grease and TSS
• Objectives of treatment
 reduce pollution intensity of pollutants in wastewater
 wastewater quality within national standards

7. • Capacity: 6 m3/hr; design capacity: 10
m3/hr
• Treatment mechanism: physico-chemical
• Treatment levels: preliminary, primary
and advanced treatments
Effluent Treatment Plant at Renata
Limited
Effluent Screening Equalization
Tank
Coagulation
&
Flocculation
Sedimentation
Tank
Sand Bed
Aeration
Tank
Activated
Carbon Filter
Discharge
(TreatedWater)
Rich with Suspended Solid
Storage Tank
(Coagulant Dosing)
Storage Tank
(Flocculant Dosing)
Sand Bed
Filter
To Incinerator
Excess water
Plant area: 300 m2

8. Equalization Unit
• Effluent with high pollutant concentration,
temperature
• Aeration and mixing carried out in this unit
Coagulation and Flocculation Unit
• Coagulant used: RCL (trade name)
• Flocculant used: cationic polyelectrolyte
• Mechanical agitation in coagulation tank
• Very slow wastewater motion in flocculation tank
Treatment Operations and Processes
 Reduction of temperature
 Prevention of settleable solids from depositing
 Increase in DO
 Reduction of BOD5 of wastewater by 40%
 Suspended particles do not settle
 Reduction of TSS of wastewater by 80%
 Further reduction of BOD5 to 80%

9. Sedimentation Unit
Sand Bed
• Underflow-sludge settles on a bed of sand
• Dries by natural evaporation and drainage of excess
water
• Excess water returns to equalization tank
• Dried sludge scraped off every 15 days and later
incinerated
 Cheap and natural drying
 Disposal of solid waste
 Further reduction of TSS, BOD and
COD
• 3- chambered unit: floc zone, quiscent
zone, tube settlers
• Contains tube settlers/corrugated tins:
increased surface area and contact time
• Flocs and suspended solids settle at the
bottom resulting in sludge and clarified
wastewater
Treatment Operations and Processes (cont’d)

10. Sand Bed Filter
• Overflow enters sand bed filter for clarification
• Filter comprises of layers of sand of various
particle sizes
Activated Carbon Filter
• Advanced treatment; wastewater polishing
• Mechanism of treatment: chemical adsorption
• Spent activated carbon regeneration:
backwashing
 Further reduction of residual
 Reduction of BOD and COD
 Further reduction of TSS, TDS
 Removal of odour, color toxicity
Treatment Operations and Processes (cont’d)

11. Aeration Unit
• Air is blown through a three-phase
• Wastewater becomes oxygen-rich
• Treated wastewater is discharged into
municipal sewage system
 Increase in DO level
 ECR 1997 standard for DO for
discharge into public sewer
Treatment Operations and Processes (cont’d)
Discharge Point
 Safe disposal of wastewater

12. Diagnosis of Effluent Treatment Plant at
Renata Limited
Monitoring
Testing
• Influent and Effluent samples collected from inlet and outlet of
ETP every 15 days
• Parameters monitored
Inlet: pH, DO
Outlet: pH, DO
• DO determined by Winkler method
• pH determined using pH meter

13. • Treated wastewater and wastewater quality meeting national standards
BOD5, COD, DO, Electric Conductivity, Oil & Grease and TSS
Outcome
Wastewater treated
with coagulant and
flocculant
Treated Wastewater
at discharge point

14. • Untreated wastewater parameters of Renata Limited not meeting national
standards
BOD5, COD, DO, Electric Conductivity, Oil & Grease and TSS
Observation and Discussion
Parameters to monitored at ETP Concentration levels
Units
Frequency of
Monitoring at
Renata Limited
Department of
Environment,
Bangladesh
Renata Limited Renata Limited National
StandardsInlet Outlet Inlet Outlet
pH pH pH 6-8 6-9 6.0-9.0 every 15 days
BOD5 at 20oC 250 mg/L
COD 400 mg/L
DO DO DO < 1 > 5.4 4.5-8.0 mg/L every 15 days
Electric Conductivity 2100 µS/cm
Oil and Grease 20 mg/L
Total Suspended
Solids
500 mg/L
Table : Comparison of parameters and their concentration levels suggested by DoE and monitored at Renata Limited.

15. • Industrial wastewater needs to be treated before disposal
• Effluent treatment plants treat wastewater for safe disposal
• ETPs must be operated effectively and as per national
standards to produce good effluents
• Regular monitoring of wastewater parameters at entrance
and disposal points need to be conducted
Conclusion
• Monitoring and tests optimise ETP performance
and minimise expenditure on energy and
chemicals

16. Any Query???

17. THANK YOU ALL………