The effluent from lime preparation and clarifire houses contains suspended particles and inorganic chemicals as TDS.

Total quantity of effluent due to spillage, leakage, floor and equipment washings will be about 72 M3/day.

2.16   Boiler Blow Down

Boiler feed wafer contains a small concentration of dissolved solids. Antiscaling and stabilizing chemicals are added to the boiler feed water to prevent scale formation, corrosion. As the evaporation continues, concentration of dissolved solids in boiler increases. Therefore solids continues to build up in the boiler, boiler blow down of about 2%of the total evaporation is therefore given from the boiler to control the concentration of dissolved  solids in the boiler water. The quantity of boiler blow down is relatively of-Better quality and therefore advantageously added to the circulating cooling'water channel. The blow down allowed in the boiler is about 24 m3/d.

2.16.1 Laboratory Waste Water

Waste water is generated in the laboratory due to washing and rinsing of apparatus. The chemicals and juice used in the laboratory are ultimately let out to drain along with water as waste water. The effluent is small in quantity and moderately contaminated. Recycle of juice samples and chemicals to factory process will control the quantity and. quality of waste water from the laboratory. The laboratory waste water generated will be about 0.5 m3 /day

2.16.2 Domestic Waste Water

Domestic waste water of about 40 lit/ d, per head is generated in the factory. The effluent is stabilized in septic tanks and overflow is taken to effluent treatment plant for further treatment. The domestic effluent from the factory will be about 12 m3/day

2.16.3 Purge From Barometric Condenser

The vapors from last effect evaporator and pan boiling are cooled in barometric condensers. The vapour compensate alongwith the cooling (quenching) water goes to the cooling tower. Part of the  water is lost as vapour losses and drift in the cooling tower. Excess water from cooling tower channel is discharged as purge effluent. In case of overloading of pan and evaporators the spooling water may become highly contaminated due to entrainments. This water is relatively more contaminated as compared to the cooling water of turbine condenser or of mill bearing. Hence, the purge water from the latter are added to the circulating