A rapid sand filter unit has to supply 40 million litres of water per day. 4% of filtered water is required for washing of the filter and 30 minutes are lost in washing every day. How many square filters of size 4 m each are required in the unit, when two additional filter bed are to be provided to take care of break down repair and maintenance? (Take rate of filteration as 5252 1/m²/hr)

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Integrated Solid Waste Management

Integrated Solid Waste Management (ISWM) is a thorough waste suppression, compost, removal and recycling Program. An effective ISWM system considers how to suppress, manage and recycle solid waste in a manner that is most efficiently to protect human health and the surrounding. ISWM system requires evaluation of public wants and demands and then selecting and merging the most effective waste management activities for the proposed demands. The main ISWM activities for solid waste management are Waste prevention, Recycling and Composting, and Combustion and Removal and waste collection in a properly planned, constructed, managed and mitigated landfill areas. Each of these requires careful designing, financing, accumulation, and delivery of activities.