Research Of The Fouling Of Organics And Washing Method Of Hollowness Fiber Ultra-Filter

During recent years, the innovation and improvements of the water treatment methods changes continuously, the equipments of water treatment are also of a great variety to pile up one after another. Emergency of new techniques and new equipments directly influence with our lives. Along with the new technical gradually being mature and extensive applied, also make water treatment this ancient work a thriving source of vitality. And the technique of filter and Nano-Tech both are seeping in water treatment realm. A handle to the aqueous treatment technique, the technique of filter separating is applied more extensively. The Filter separation process has characteristics blow: the material does not take place to change mutually, the separation coefficient is bigger and being operated in indoors temperature, economizing on energy efficiently. It is a new technique for debasing the crisis of energy and resources, and solving the pollution of the environment what contemporary mankind facing. In Reverse-Oozing (RO), Nano-Filter (NF), Ultra-Filter (UF),Micro-Filter(MF),because the working pressure of UF is low, and it can also producing more water and more easy to operating, therefore it is extensively applied in water treatment and medical treatment industry, food industry etc., the speed of development is very quick, the foreground is vast.The research lays empHasis on the research of the Ultra-Filter (UF) much in two aspects: l,the working state of the Ultra-Filter treatment; 2,the cleaning method of the Filter. This is investigative and with an eye to find out for the valid solution of the Ultra-Filter for chemical washing.To the working state of the Ultra-Filter, writer point to observing Ultra-Filter under a term for much polluted raw water, the conduct and actions of the filter module washes of a consults term. At the same time, each kind of contaminative material density and temperature, the value of pHs influence the working state of the Ultra-Filter very much directly. And with low pH value, low temperature; the high pollutant density work efficiency influence toward filter is biggest.To the local and other scholars in research of the Ultra-Filter (UF) just pointed on making it attain its best treatment result, and the cleaning method of the module of filter was placed in position of belonging to it. Or gave an aim at the cleaning method of a certain filter in a specific way but did not make to have the representative research argument.The writer chose the hollowness fiber filter module of the two kinds of material: Polypropylene Cyanotype (PAN) and Polymer SipHon (PS) to preceded the research. First, proceed filter module washing efficiency comparing, in some kind of chemicals, and choose among them superior three of normal chemicals in efficiency with chemicals a category, density, pH value, washing time as the factor proceed the L9(34) to hand over the experiment to acquire the result.Result of these experiment proof: 1) at the same span of working, the higher of pH value of the feed, the flow of the membrane's decreases less. Aptly advance the pH value of the feed can make the blockage of membrane's decreased.2) Sodium Hydroxide, Sodium Hypochlorite and H2O2 all have good effect on recovering of membrane's flow. And in the area of permitting concentration these chemicals, higher concentration always can make better result. H2O2 has the best effect on recovering the flow.3) It's effective on recovering of membranes that use Sodium Hydroxide and Sodium Hypochlorite in turn or Sodium Hydroxide and H2O2 respective in turn.4) It's effective that use the chemicals methods on removing pollutant stuck on membranes.5) When pH value up, better effect can be found.