Study on rough filtration plus slow sand filtration techniques for cellar water of villages and towns in Northwest China

Based on the turbidity, lower temperature and micro polluted of cellar water in villages and towns in northwest china, removal efficiency of turbidity, CODMn, NH3-N, UV254 was analyzed in this integrate technology by simulating northwest cellar rainwater. Results showed that the turbidity, CODMn, NH3-N, UV254 in yielding water became stable and the average removal rate reached 92%, 30%, 32%, 32% respectively after integrate technology was operating 25 days. The above indexes after rough filtration and slow biological filtration techniques are all accord with the standards of drinking water quality. Therefore, this integrate technology can be used to retreat the diminutive and scattered cellar water of villages and towns in northwest china.