In order to quantify wastes collected at each bin both visual (volume estimation) and weighing experiment were carried out. In the visual experiment, daily variation of volume of dustbin and approximate percentage of constituents were noted. Initially this was done for seven days covering all types of bins spread over the campus. The quantum of wastes collected at green bins was very less, hence further investigations were carried out in 128 bins (excluding green bins) for 15 days. This is repeated thrice in order to take in to account daily, weekly and seasonal variation. Visual volumes observed per bin are later converted in to equivalent weights taking in to consideration the density of materials (composition of wastes - paper, plastic, etc.).

In order to verify the reliability of visual experiments (to quantify wastes), mass of constituent solid wastes were computed by actual measurements (using a balance of 100kg and sensitivity of 0.5 kg.) for 5 days in selected sample bins (25 bins spread all over the campus covering all communities and all activities). Sample bins were selected taking in to account the constituents and frequency of wastes generated in bins. Since there was a lot of variation in the visual and corresponding weighing experiments, this experiment was repeated again and was monitored for 15 days. In sample bins both visual and weighing experiments were carried out. This enabled in arriving at the relationship among the variables (for each constituent) got from visual and weighing experiments. Based on correlation coefficient and standard error the best relationship was chosen. This relationship was used to quantify the wastes of all bins in the campus (bins monitored visually, by considering volume of wastes).