| Eutrophication is one of outstanding environmental issues, how to deal with, re-use of eutrophic water treatment process is an urgent task. China promulgated the "Integrated Wastewater Discharge Standard" (GB8978-1996) required the sewage plant effluent phosphorus content of less than 0.5mg/l. Available phosphorus is very difficult to meet emissions standards, biological phosphorus removal for secondary pollution problems; chemical phosphorus removal is mainly pharmaceutical expensive, higher operating costs and the large amount of chemical sludge; adsorption capacity of the traditional adsorption is not high, interference, dissolved losses still exist some problems. In this study, low-cost bentonite as raw material for purification, activation, preparation of a compound modifier compound and phosphorus removal agent, to determine the optimum conditions of preparation, and including the preparation of simulated wastewater containing phosphorus and phosphorus actual water body performance of research, have a good handle on the effect of phosphorus. Characterization of the modified products found:bentonite between the molecular and crystal La3+, Ti4+ ion exchange reaction occurred, CTAB modified bentonite spacing inserted to increase activity enhanced by a strong expression in the process.Modified by phosphorus compound with a certain mass ratio of phosphorus agent dosage modification agent for processing complex phosphorus removal, phosphorus removal efficiency was 90%. Room temperature, no significant effect on phosphorus removal, it can be carried out at room temperature handling of phosphorus. Meanwhile, pH=6-9, phosphorus concentration 0-100mg/1 of phosphorus-containing wastewater have good results.Through the actual water treatment study found that the removal rate of total dissolved P remained at between 85%-90%, TP removal efficiency of the whole, maintained at 60%-80%, and were more satisfied with the results obtained with great significance in practice. |
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