Air pollution in bakery
Even though Bakery Industry is a low polluting industry but for the ovens , boilers ,hot water
generators ,DG sets they all come under the Air pollution act due to emission of flue gases through
stack . Acts prescribes limits on the emission and stack height and in addition to it covers noise
pollution with it .Various countries have different values . We would cover Indian Standards.Bigger
plants with more than two or three production line of Bread or Biscuit ovens with six or seven zones
can emit considerable amount of flue gases which consists of carbon monoxides, Sulphur Oxides
,Nitrogen oxides which are dangerous for health and if not monitored can result in polluting
neighbourhood .
Emission limits and stack parameter as per the Act .CPCB ( Central Pollution Control Board) national
air ambient qualityStack Height = 15meter or
moreNOX-50ppmSOX-80ppmCO-4mg/cumSPM-100ppmAir pollution can be minimised with following
stepsUse flue gas analyser for stack monitoring in regular intervals Do regular burner
maintenanceSubstitute if possible diesel oil to LPG or Natural GasUse high pressure monoblock
burnersGet low sulphur diesel oil
Noise Pollution can be controlled by following stepsSafe limit prescribed in Act is 70 db in night time
and 75 db in day time as CPCB standardsMonitor noise through decibel meter .DG set room to be to
be lined with acoustic lining
Maintain equipment with maintenance schedule sUse equipments with enclosureUse screw
compressors instead of reciprocating compressor Silencers in stack for DG Sets.Put anti - vibration
pad where ever possible for machinery
.
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