A waste activated sludge (WAS) is to be blended with green waste (GW). The carbon (C) and nitrogen (N) contents, per {kg} of WAS and GW on dry basis are given in the table.ParameterWASGWCarbon (g)54360Nitrogen106The ratio of WAS to GW required (up to two decimal places) to achieved a blended C:N ratio of 20: 1 on dry basis is

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