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suggested solution for high ammonia comtamination
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Water Rationing due to High Ammonia Contamination in MalaysiaPresented by: The Night OwlsKong Ka ManWong Win YeeNur Amirah Hani binti Mohd Azmi
Water Rationing Issue in Malaysia 2014
WaterRationingIssuein Malaysia2014
Problem StatementHigh ammonia contamination in Sungai Langat early this year has caused the closure of two water treatment plants which are the Batu 11 and Bukit Tampoi water treatment plant. The closure of both the plant has caused water rationing around Klang Valley and Kuala Lumpur area. The Selangor government short-term measure is to fork out RM350,000 per month for chemicals that will increase the ventilation rate while the long-term plan is to replace the water filter at the treatment plants with sodium aluminosilicate. However, the cost for the proposal is RM5million and the plan takes a long time to complete which is between 6-8months.
FocusHigh Ammonia Contamination
Look for Alternative Solution
XThis is because:Leads to adverse effects on environment and human healthHigh costLow efficiency of ammonia removal
Alternative Solution: Immobilized Nitrifying Bacteria
Adopted from NITROGEN CYCLE
Effluents dischargedNitrogenAlternative Solution: Immobilized Nitrifying Bacteria
Adopted from NITROGEN CYCLE
Effluents dischargedNitrogenNH4+ + 1.5 O2 NO2- + H2O +2H+
NO2- + 0.5 O2 NO3-
2 NO3- + 2H+ N2 + H2O + 2.5 O2
AEROBIC PROCESSANAEROBIC PROCESS
Significant Idea: Immobilized Nitrifying BacteriaWhat is IMMOBILIZED NITRIFYING BACTERIA?
Polymer Aqueous GelMicroorganisms(Nitrifying bacteria: Nitrosomonas & Nitrobacter)Immobilized support to hold the nitrifying bacteriaBacteria easy to be multiplied on the inside surfaceMultiply in aerobic tank efficiently
How Problem SolvedUsage of Nitrosomonas & Nitrobacter:Reduce usage of chemicalsNo adverse effects on environment and human healthSave the cost spend on chemicals purchasing and treating
How Problem SolvedNitrosomonas & Nitrobacter suitable to be used due to its:Optimal temperature between 25 to 30oCOptimum pH ranged between 7.0 and 8.5Nitrosomonas growth is inhibited at pH 6.5
How Problem Solved
Initial Sedimentation Tank Final Sedimentation Tank Anaerobic TankAerobic TankC : Nitrifying PelletInitial Sedimentation Tank Final Sedimentation Tank Anaerobic TankAerobic TankBy using immobilized nitrifying bacteria:Without immobilized nitrifying bacteria:6 8 hours12 16 hoursHow Problem Solved
Shorter time is taken to remove the ammoniaRemoval of ammonia can be carried out earlier when problem detected as this system is implemented in sedimentation instead of filtration
Initial Sedimentation Tank Final Sedimentation Tank Anaerobic TankAerobic TankC : Nitrifying PelletBy using immobilized nitrifying bacteria:6 8 hoursSketch
Initial Sedimentation Tank Final Sedimentation Tank Anaerobic TankAerobic TankC
: Nitrifying Pellet
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