Activated Sludge Process (ASP)
Activated Sludge Process (ASP):The activated sludge process (ASP) is an aerobic continuous biological process. This
process can be used to remove dissolved organic, biodegradable substances and
nitrogenous compounds from wastewater. It is the most widely used biological
wastewater treatment process.
Applications of ASP
Oxidation of Carbonaceous biological matter in
Municipal Wastewater
Oxidation of Nitrogenous matter in Municipal
Wastewater
Oxidation of Carbonaceous biological matter in Industrial
Wastewater
Oxidation of Nitrogenous matter in Industrial
Wastewater
Complete Supply Unit with Trainer
Schematic representation of an ASPSensors & Stirrers
Trainer
King Abdulaziz University
Faculty of Engineering, Rabigh
Dep. of Chemical & Mat. Engineering
Ion Exchange Demonstration Unit
Ion Exchange Process :Ion Exchange involves ions from a liquid being bonded onto the surface of a suitable
Solid and other ions being given up to the liquid in return. This enables substances to
be removed from solutions. The solid that takes up the ions from the liquid is known
as the ion exchanger.
Applications of Ion Exchangers
Water Softening Dealkalisation of Water Total Demineralisation of Water
Ion Exchange Unit
P
Ion Exchange Unit Layout
King Abdulaziz University
Faculty of Engineering, Rabigh
Dep. of Chemical & Mat. Engineering
Anaerobic Digester
Anaerobic Digestion Process:
Anaerobic processes involve bacteria that function only in the absence of air. In this
process the organic matter is broken down by a consortium of microorganisms in the
absence of oxygen and lead to the formation of digest-ate and biogas which mainly
consist of methane and carbon dioxide. Anaerobic digestion works best at 30 – 60°C.
Between 30 and 40°C, mesophilic bacteria are the principal micro-organisms present.
At 40 – 60°C, thermophilic bacteria are used.
Applications of Anaerobic Digestion
Industrial effluent treatment
Municipal Waste treatment
Sewage Sludge treatment
Agricultural wastes treatment
Anaerobic Digester Unit
Side View of Anaerobic Digester
Front View of Anaerobic Digester
Anaerobic Digester Flow Diagram
Rear View of Anaerobic Digester
1 and 2. Reactors
3. Peristaltic Pump
4. Feed inlet pipe
5. Gas Seal
6. Packing
7. Buffer Vessel
8. Overflow
9. Variable speed Peristaltic Pump
10. Central pipe
11. Gas Seal
12 and 13. Calibrated gas collecting vessels of 5 litre capacity
14 and 15. Electrical heating mats
16 and 17. Temperature Sensors
18. 10 turn potentiometer
19. Toggle Switch
21 and 22. BNC Sockets
23. Output Socket
24. Mains Power Input Socket
25. Residual current circuit breaker
26. Miniature Circuit Breakers
27 and 28. Electrical output Sockets
29. Valve
30. Hand hole
31. Overflow
32. Drain valve
King Abdulaziz University
Faculty of Engineering, Rabigh
Dep. of Chemical & Mat. Engineering
Reverse Osmosis
Applications
Wastewater treatment Plants
Water treatment Chemical purification Pore size filtering
Spiral wound membrane module
King Abdulaziz University
Faculty of Engineering, Rabigh
Dep. of Chemical & Mat. Engineering
Membrane separation:A membrane envelope is made up of two membranes with a porous spacer betweenthem. The spacers together with the membrane envelopes are wound spirally aroundthe permeate collecting tube. The salt solution arrives at the front face of the moduleand flows axially between the envelopes. The semi-permeable membrane ispermeable to water (permeate) but not to dissolved NaCl.
1 permeate, 2 raw water, 3 spacer, 4 membrane envelope, 5 retentate, 6 permeate collecting tube
1 spiral wound membrane module, 2 retentate, 3 permeate, 4 retentate valve, 5 distilled water, 6 raw water (salt solution), 7 permeate, 8 pump, 9 overflow valve, 10 pulsation damper; P pressure, F flow rate, T temperature, E conductivity
Biofilm process
Applications
Wastewater treatment Plants
Aerobic biofilm processes
Practical experiment Concentration profile
Carrier material for biofilm
King Abdulaziz University
Faculty of Engineering, Rabigh
Dep. of Chemical & Mat. Engineering
Trickling filters:A pump transports the wastewater from the supply unit to the upper end of the
trickling filter. The wastewater drops down on the trickling filter using a rotary
distributor. In the trickling filter there is a fixed bed consisting of special carrier
material. On this carrier material there is a thin layer of microorganisms (biofilm).
While the wastewater trickles through the fixed bed, the microorganisms clean the
wastewater by biological processes.
1 wastewater tank, 2 collecting tank, 3 secondary clarifier, 4
return sludge, 5 trickling filter, 6 air, 7 recirculation, 8
wastewater; F flow rate
Fixed biofilm processes
• functional principle of a trickling filter
• recording of concentration profiles
• creation of a stable operating state
• identification of the following influencing
factors
• flow rate of recirculation
• volumetric loading of the trickling filter
• surface loading of the trickling filter
• comparison of various carrier materials
Top Related