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Rich reserves of groundwater , water quality and stability , an important part of the city water supply . But when excessive iron and manganese concentrations in groundwater or other contamination problems will undoubtedly affect the water quality of the city water supply . In this paper, the problem of excessive levels of manganese in groundwater investigation and analysis of the D city in the southern region groundwater source . The municipal water company mainly iron, manganese removal process , a pilot experiment , to provide the basis for the technological transformation of the municipal water company , to ensure high-quality water supply to the user . This thesis is based on access to water monitoring data and field survey results , A water and B water manganese content in water quality monitoring data collated Results A water and B water export water manganese content in an average of about 0.15mg / L , has exceeded the standard requirements (≤ 0.1mg / L). Determine water effluent manganese content exceeded the water manganese content exceeded the main reason for the exploitation of groundwater ( 1 ) is not preferred short , ② oxidation of contact time , ( 3 ) the use of quartz sand as a filter ④ filter fast , affecting the filtering effect . Underground sources of manganese content exceeded the corresponding countermeasures were proposed , mainly ① Select the exploitation of groundwater ,封停high manganese content of the deep well , row ② install deep well aeration device ( 3 ) The use of manganese sand as a filter , ④ to filter operating conditions adjust , test , achieve constant speed filtering . The experimental results showed that : After take封停poor water quality wells running Tseng A, B, C classification ; oxidation aeration time of 15 minutes ; single stage manganese sand filtration ; The canister just finished backwash of the raw water valve opening degree 1/ 8 other valves normal ; running after 12 hours , adjust the filtration tank valve opening degree to 1 / 4 ; the cumulative run to 24 hours after the valve opens to 1/2 ; the cumulative run to 36 hours after the valve opens to 3/4 ; raw water fully open and above governance measures accumulated 48 hours after the run , the manganese content in the finished water is reduced to 0.072 mg / L, to meet the standard requirements . After the renovation project of the municipal water company , resulting in a better economic and social benefits, improve water quality , and to ensure the continuity of the water supply , and reduce the impact on the user , the water supply company to the public \, continuous commitment of the water supply , maintenance D City area social stability and promote economic development , an important foundation for one of the conditions people live and work in peace and contentment .
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