Research On The Purification Laws Of The Modified Anthracite Packing In Vertical Flow Constructed Wetland

Based on the study of artificial wetland modified anthracite packing to theremoval effect of pollutants in wastewater for the purpose, through natural anthraciteas substrate, based on the real-time synthesis of LDHs effect of typical vertical flowconstructed wetland packing of modification, to lay the theoretical basis for themodified filler with the purpose of efficient purification of pollutants.Throughmodification of anthracite on water purification effect analysis of main pollutants, forpacking modification process control and purification mechanism to provide scientificcriterion.This study has two parts, Including anthracite modification experiments and thepurification experiment of the modification and unmodification anthracite, artificialwetland models for intermittent operation mode for sewage purification experiment.This experiment was carried out a year of system operation and monitoring indexes,so for anthracite of modified and unmodified packing have a basic understanding tothe rules of remove pollutants. The main results are as follows:(1) Figure can bejudged that laminating of metal ions is successful by electron effect of metal ions onthe filler surface, at the same time, it explains the experiment of the modified methodis feasible and it can realize the anthracite of LDHs coated.(2) in the experiment, thephosphorus removal rate over90%, almost every one of organic matter removal fromabout70%to80%, but remove only60%to70%of nitrogen, explains theexperimental simulation of vertical flow constructed wetland on the organic matterand phosphorus removal effect is better than the nitrogen removal effect.(3) on thewhole, packing on organic matter removal mechanism of the anthracite focusedprimarily on chemistry function and biological effect; The nitrogen removalmechanism mainly focused on biological effect；On phosphorus removal mechanismfocuses on chemistry effect.(4) in anthracite to comprehensive removal effect of eachindex, the medium size is best，the small size is the second one，the large size is badone；Stability comprehensive view, the large size is best，the small size the secondone，the medium size is bad one.(5) when the three kinds particle size of themodification and unmodification anthracite remove of the seven indicators, such asCODcr、total nitrogen、ammonia nitrogen、nitrate nitrogen、total phosphorus、solublephosphate and soluble phosphorus, the removal efficiency of big and medium particle size of anthracite is modified anthracite better than the unmodified natural anthracite.(6) six used for modification of the metal ions in view of the composition ofpollutants in a certain specific treatment effect is different, the removal of organicmatter and nitrogen, Ferric iron ion and Bivalent magnesium ions effect is better；Interms of dealing with phosphorus, trivalent cobalt and bivalent zinc is better, therefore,in the actual application according to different water conditions choose different metalions on modification.