Food Industry
Waste generated from food industry and agricultural activities are known to have distinctive characteristics as compared to common waste water managed bypublic or private waste water or sewage treatment plants. It is bio-degradable as well as non-toxic in nature, containing high levels of biochemical oxygen demand and other suspended solids. The elements of food or agriculture waste water are difficult to predict due to the differences in concentration levels of biochemical oxygen demand and pH in sewage from vegetables, fruits and other products.
Usually processing of agro food requires large quantities of water. Vegetables and fruit washing releases water with high amount of particulate matter and some dissolved organics and surfactants. Whereas, butchering and processing generates strong organic waste from body fluids like blood, etc. This waste water is contaminated with high levels of anti-biotic and growth hormones from the animals as well as variety of pesticides. Insecticide residue poses problems in treating waste water generated in wool processing.
Waste generated from cooking is often rich in plant organic material and salts, colours, flavours, acids, etc. The waste water generated from food processing activities is non-toxic because it comprises less hazardous and compounds. This waste water can be treated using biological techniques and technologies. Problem with waste generated from food processing and use of water is that it is located in rural areas where mostly potable water treatment systems are designed to serve small populations. Due to which, one reasonably sized plant can affect the local water supply and surface water quality.
Pathogenic organisms are another contaminant present in waste water produced from meat, sea-food processing and poultry industries. This kind of waste water is usually disinfected with chlorine, prior to their discharge in water bodies. Almost fifty per cent of the water utilized in food processing industry is for washing and rinsing purposes. Water being the primary ingredient is widely used as a cleaning agent in food processing industry.
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is continually depleting with its increasing demand. Key reasons that account for the growing demand of water.