A short-process drinking water advanced treatment system and process

Abstract

The invention provides a short-flow drinking water deep processing system. The system is characterized by mainly comprising a concrete / settling pond, a carbon and sand filter and an ultrafiltration membrane workshop which are sequentially connected. The carbon and sand filter is filled with silica sand and active carbon. The granularity of silica sand in the carbon and sand filter is 0.5-1.0 mm. The filling height of silica sand is 20 cm. The filling height of active carbon is larger than or equal to 100 cm. The processing technology adopting the system includes the following steps that S1, output water of the settling pond directly enters the carbon and sand filter, water flows downwards in the carbon and sand filter, and output water of the carbon and sand filter enters the ultrafiltration membrane workshop; S2, ultrafiltration membrane filtration is conducted. By means of the system and the technology, the membrane pollution probability is lowered, device space is saved, the deep processing of drinking water is achieved, efficiency is high, effect is excellent, and industrial application can be achieved.

Description

technical field [0001] The invention relates to the field of water and waste water treatment, in particular to a short-flow drinking water advanced treatment system and process in drinking water treatment. Background technique [0002] Activated carbon filtration is currently a relatively mature and widely used advanced treatment process, which can effectively remove ammonia nitrogen and organic matter in slightly polluted raw water. Moreover, activated carbon can be cultivated to form biological activated carbon, which can give full play to the role of microorganisms and strengthen the removal of ammonia nitrogen and organic matter. Therefore, the biological activated carbon process has become an advanced treatment process that is widely used in China. [0003] The problems of biological activated carbon process in drinking water treatment include pH reduction, increase of effluent particulate matter, possible risk of microbial leakage, etc., and its use in drinking water t...

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Problems solved by technology

[0005] Based on the above discussion, it can be seen that there are still some problems in the existing methods and equipment that have not been resolved: 1) If the ultrafiltration membrane forms a membrane bioreactor with microorganisms, it will face the problem of membrane fouling, and there is a risk of microbial leakage; 2) the ultrafiltration membrane The technological process of pre-positioning and post-activation of activated carbon, on the one hand, aggravates the pollution load of the membrane, and on the other hand, the risk of microbial leakage of activated carbon cannot be controlled; , Increased floor area, increased water production costs; 4) Ultrafiltration membrane flux is low, generally lower than 50L / m 2 h, the backwash cycle is short, generally less than 50 minutes

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