A Feasibility Study On The Waste Fabric Reclaimed In Sewage Treatment As Fillers

The aim of this dissertation is to study the waste fabric reused as filler.Selected cotton fabric, gunny cloth, flannelette, mixed spinning with cotton and terylene (hereinafter called'blended fabric') as experimental material, which are abundantly available.Firstly, the anti-corrosion, breaking strength also retained, and molecular structure of these materials were tested to analyze how and why these materials had changes under different conditions. The optimal temperatures ranging from 10 to 35℃, have been gotten by a series of experiments; Waste fabrics have poor corrosion resistance. The molecular structure was tested by Fourier transformed infrared (FTIR) to analyze the chemical action on these materials.Sceondly, studied on the relationship between material characteristic and biomass. It's positively correlated that materials' weight, ventilation volume, thickness, roughness with biomass except hydrophilicity. The optimum processing condition was found through orthogonal experiment:the reaction temperature is 30℃, the pH value is 7, aeration rate is 3L/min. Uesful life was tested in pilot-plant of wastewater treatment. To draw the proper conclusions from analyze the breaking strength and elongation variation. These materials'useful life is flannelettes'> gunny cloths'= blended fabrics'(9 months)>cotton's(6 months). The surface morbhology was observed by the scaning electron microscope (SEM). Flannelette almostly has any degradation on the surface, while other materials turned up spin-off and degradation. Thirdly, one bacterium have been isolated from the sewage sludge-enrichment. Accession number is HQ455787 in the GenBank.It was identified as Acinetobacter sp. X16. The components of the fermentation liquor were analysed by infrared spectrometry and UV scanner. It containing many molecules of amino acids and hydroxide radical (-OH). Selected cotton as objects, and detected the binding force between microorganisms and fillers. The experimental results show that the flocculating mechanism is adsorption and interparticle bridging, then cotton fabric and gunny cloth can easily be decomposed by microbes, while flannelette are not readily degraded.Fourthly, the high quality effluent condition was observed when HRT is 20h, MLSS is 5500～7500mg/L, DO is 2-4 mg/L. Comparison with existing projects, These reclaimed fillers is good at treatment effect with effluent meeting the requirement for wastewater reuse. Finally, The economic analysis of merchant filler and reclaimed fillers was made. Reclaimed fillers can saving 52.4 RMB per 3 year in the pilot-plant with 1.3m×1.3m×2.0m..This subject has been patented by Patent Office of the People's Republic of China, patent No. ZL 2009 2 0211269.9.