SKIL in Environmental Control
A sugar factory, whether it is processing cane or beet, can potentially generate significant amounts of pollution. The main areas where this can occur (in order of potential importance) are:
WaterSugar factories require significant amounts of water in order to operate effectively and inevitably discharge organic laden effluent.
SKIL's initial approach is to optimise water use and hence discharge quantities through the use of pinch technology. This simplifies the task of treating the discharge although is limited by the water content of the crop.
Stack EmissionsBoth cane and beet factories discharge combustion products into the atmosphere via chimney systems.
Whilst the fuels used (bagasse, possibly supplemented by auxilliary fossil fuel, in cane mills and fossil fuels in beet factories) are quite different, the environmental control principles are the same.
In the case of cane mills, the discharge consists almost exclusively of fine particulate matter and smoke due to incomplete combustion of fuel. NOx tends to be low and SOx effectively only comes from the auxilliary fuel.
In beet plants where coal or oil is employed as fuel, NOx and SOx are potential pollutants. Additionally, in beet factories with pulp drying equipment, the chimney discharge problems associated with the fuel being used are supplemented by an odour problem due to sugar destruction and similar processes in the drying plant.
SKIL specialists are able to assist with the control of stack emissions and would:
OdourUnpleasant odours from sugar plants, in addition to the chimney discharges, mainly occur in settlement/ treatment lagoons.
SKIL adopts an approach aimed at reducing the BOD/COD loading in the discharges before examining ways to reduce the odour problem. Once this is done the odour aspect can be dealt with, usually by enhanced anaerobic treatment where the odours can be contained and ultimately burned with the bio-gas which is generated.
Noise and DustCertain parts of the plant are inevitably noisy, even under normal operations. SKIL can identify such points and if necessary quantify the noise levels. Recommendations can be made regarding changes which can be made to protect both factory personnel and nearby residents from excessive noise pollution.
Most dust problems are best handled by improving cleanliness although lime plant can be fitted with suitable dust control equipment.