| The thesis focuses on the comparative study of the practical application of theirremoving performances of two improved bio-packings. Based on the comprehensivecharacterization and generalization of the various particle carriers along with theirapplicable reactors, it is the first time to use the two new carriers for the comparativestudy on their removing performances for waste gas and wastewater under theexperimental condition of poor nutrition, rich nutrition as well as high nutrition,associated with trickling filter, stable bed and fluidized bed. Both of the two carriersare characteristic of low cost and special performance. The results indicate that boththem present quality characters and both can be selected as ideal biological carriersfor particular reactors according to their each performances and characters, which canremove organic pollutants effectively.High efficient Biological ceramics characteristic of lightweight and biofil-hanging areporous particular packings made of inert materials after manual sintering. Because ofthe density and other physicochemical properties which can be adjusted during theperiod of manual sintering, bio-ceramics are especially suited to be as carriers forfixed bed and fluidised bed. Compared to Hat Creek Coals, microorgnisms are easilyfixed to the surface of bio-ceramics because of their larger surfaces and abundantmicropores, which resulting into the better characters in terms of the ability ofremoving pollutants and the property of biofilm fixation in the case of nutritionsupplied unlimitedly;Moreover, with the characteristics of lightweight and highstrength, average particle size, regular shape, surface property superiority and thekind , bio-ceramics can be used as preferred carriers biological in the fluidided bedand submerged fixed bed used for treating organic wastewater, in which the removalrate of CODCr and Nitrogen is better that Hat creek coals bio-reactor;However, thetreatment efficiency is not as ideal as Hat Creek coal carriers in trickling filter usedfor the treatment of waste gas and low concentration wastewater in the runningcondition of poor nutrition .Hat Creek coal is naturally formed with irregular shape and uneven particular size. Itcan be selected as bio-carrier for fixed bed and trickling bed, especially suitable forpoor nutritional running trickling filter packing because of its unique physicochemicalproperty. Presenting this kind of characteristic physicochemical performance, HatCreek coal carriers can still be capable of removing pollutants due to the abundantbiofilm hanging and growth, even under the running condition that nutrition is thelimited factor of the process;Hat creek carrier tricking filter for disposing of wastegas can present the better removal efficiency in the running case of lower capacityload, without adding more nutrient solution;Hat Creek coal trickling filter is superiorto bio-ceramic carrier tricking filter with the low-concentration of wastewaterinfluent;In contrast, being as the medium of submerged fixed bed for sewagetreatment, the various performance indexes including nitrification efficiency, filterpressure are worse than that of bio-ceramic reactor;Hat Creek coal carrier is notsuitable for fluidized bed because of the high energy consumption resulting from itsirregular shape and heavy specific weight.The experimental study has gained the valuable data and result, which is helpful forimproving the development of research and application on particle bio-reactors inChina. |
PDF Full Text Request