| Presently,because of the Huaihe river have beening polluted and the conventional water purification system can’t efficiently remove the pollutions such as resolvable organics and ammonia nitrogen etc. With the development of the living standard of the people, searching for the proper technology to treat to protect of drinking water sources become more and more important.According to the Huaihe water with micro-polluted characteristic. Further study has been conducted to evaluate the performance of the slow zeolite filtration removing the Turbidity,organic matters,NH3-N by pilot-plant experiments. Analysising the major influencing factors.Finally summarizing the rules of removing organic matters,NH3-N by the slow zeolite filtration. Provide theoretical support for the water treatment plant upgrade.The experimental results shows that:the slow zeolite filtration has good results for Turbidity, CODMn, UV254, NH3-N removal. The condition of water quality of Huaihe water: turbidity is9-90NTU, CODMn is2.0-5.4mg/L, UV254is0.08-0.1cm-1, NH3-N is0.9-1.7mg/L; when the Zeolite fillers was heating zeolite at500℃for2.5hours, dipping it in the5%NaCl solution for3hours, the removal rate at Turbidity, CODMn, UV254, NH3-N basic for92%,17%,12%,90%. Comparing with the zeolite fillers was only dipping in the5%NaCl solution for3hours, the removal rate of Turbidity, CODMn, UV254, NH3-N were respectively increased by0.5%,9%,60%,7%. At the same time, the slow zeolite filtration can make the NH3-N concentration maintained at below0.2mg/L, completely in line with drinking water quality standards.In addition, the study also found that appropriate to increase the thickness of filter bed can achieve a good effect of water quality. Data presentation, water temperature is important influence factors for the performance. Comparing with the low temperature, when the water at room temperature the removal rate of CODMn, NH3-N respectively increased8%,10%. |
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