Active Slag Strengthen The Performance And Application Of Phosphorus Removal From Wastewater

In this paper we bring forward that Fast Water Cooling Steel Waste Sediment(FWCSS) was applied to remove phosphor from wastewater, which is a new technology and was firstly used in practice. The theory of technology is based on the chemical-dephosphorization. Using FWCSS as filter-material and chemical-medicament to remove phosphor in chemical-filter-cylinder to treat the low concentration effluence which can not reach the standard of discharge with a view of the seriously phosphor polluting status in quo in our country.Using FWCSS which is one of byproducts (castoffs) from steel-making as studying objects in the experiment. First of all, we determined the essence of FWCSS, and then we studied the mostly factors and influence orderliness which affect the rates of dephosphorization by experiment; finally we made the dephosphorization mechanism study and discussion.Firstly we did experiment to study the TP concentration, pH, diameter FWCSS in influence and the reaction-time have effect on the rate of dephosphorization. Secondly we studied the removal orderliness of SS, CODcr, NH3-N in the filter cylinder in continuous experiment. The results show that: FWCSS has larger dephosphorization capacity in higher concentration of effluence, but larger rate of dephosphorization in lower concentration. FWCSS can keep steady dephosphorization rates when pH changing in effluence and keeping pH steadily in influence which ranged between 6 and 8. The diameter of FWCSS is smaller; the FWCSS dephosphorization capacity is larger. The best diameter's capacity is 0.71mg/g and best reaction-time is 15~25 minutes .Then we added activation medicament into FWCSS in order to heighten the dephosphorization capacity. The activation medicament can inducted the latent dephosphorization capacity of FWCSS. We studied different activation medicaments, different temperature in incinerator, which has effect on the rate of dephosphorization. The results show that the best temperature is 450 C,the best activation medicament is FeCl3. At this condition the AFWCSS dephosphorization capacity is 1.025mg/g.In order to use it hi practice, we used the AFWCSS as filter-material to do the filter-cylinder experiment. And then we got some precious useful technique's running parameter, the results show that velocity of flow is 1.4~ 1.5L/h, the diameter of FWCSS is 20~30M, the dephosphorization rate is above 85%...