Wastewater Treatment Services
Wastewater Engineering Group's
experience in water and wastewater treatment includes planning,
evaluation, design, construction, inspection, operation and troubleshooting
for the complete range of industrial and municipal wastewater
treatment requirements. We are good at both conventional and advanced
water and wastewater treatment processes.
Various technologies used
in waste water treatment applications include:
Physical and Chemical
Treatment
- Solids removal by bar screens & fine screens
- Sedimentation
- Clarification
- Oil and grease removal by grease separators, skimmers or dissolved
air flotation (DAF)
- filtrations by sand, media or
- MF (micro-filtration) and UF (ultra-filtration) membrane filtrations
- centrifugation
- precipitation
- flocculation and coagulation
- ion exchange
Biological
Wastewater Treatment
Biological treatment of waste water and (domestic) sewage water
is used to degrade the organic load of soluted organic compounds.
There are two main catagories:
- aerobic treatment
- anaerobic treatment
If categorized in terms of the unit operations, biological wastewater
treatment processes include:
The table blow shows the major types of biological processes
used in wastewater treatment plants
| Biological Process |
Growth Configuration |
Feeding Pattern |
Redox Conditions |
Remarks |
| Anaerobic digistion (AD) |
Suspended growth |
Continous or
Batch |
Anaerobic |
|
| Anaerobic filter (AF) |
Fixed film |
Continuous |
Anaerobic |
|
| Activated sludge process (ASP) |
Suspended growth |
Continuous |
Aerobic (Anoxic) (Anaerobic) |
CAS |
| Biological aerated filters (BAF) |
Fixed film |
Continuous |
Aerobic |
|
| Rotating biological contactor (RBC) |
Fixed film |
Continuous |
Aerobic |
|
| Sequencing batch
reactor (SBR) |
Suspended growth |
Batch |
Aerobic (Anoxic) |
|
| Trickling filter (TF) |
Fixed film |
Continuous |
Aerobic |
|
| Unflow
anaerobic sludge blanket (UASB) |
Suspended growth |
Continuous |
Anaerobic |
|
| Membrane bireactor
(MBR) |
Suspended growth |
Continuous |
Aerobic (Anoxic) |
|
| Moving bed
biofilm reacotr (MBBR) |
Suspended growth and Attached film growth |
Batch |
Aerobic (Anoxic) |
derived from CAS |
Residual
Treatment
- anaerboic sludge digesters
- sludge thickening treatment
/ stabilization
- filter press
- sand drying bed or other
sludge drying
- dry sludge incineration
Effluent
Polishing/ FurtherTreatment
- disinfection by chlorination, UV (ultra-violet) or ozonation
- activated carbon adsorbsion
|
