Dissertation > Excellent graduate degree dissertation topics show

Study on Bio-drying of Paper Mill Sludge

Author: ChenQingLin
Tutor: NingXunAn
School: Guangdong University of Technology
Course: Environmental Engineering
Keywords: paper mill sludge (PMS) bio-drying orthogonal experiments moisture content(MC)
CLC: X793
Type: Master's thesis
Year: 2011
Downloads: 25
Quote: 0
Read: Download Dissertation


In recent years, with the rapid development of our country’s paper industry, water ollution problems came out. As the wastewater treatment rate and depth of our country’s ulp and paper industry increaseing, paper making sludge production increased dramatically, ’aper mill sludge (PMS) was a complex composition of waste, and it was difficult to treat, "he treatment of PMS trended to be quantitative reduction, harmlessness and resource. The armless treat of PMS had become an urgent environmental problem.Sludge bio-drying could be definited as follow:it biodegradated the organic matter of ewatered sludge, speeded up the water loss of sludge, and produced dried sludge with lower loisture content (MC), under the condition of high temperature. With the treatment of io-drying, PMS could be using as agricultural additions, and dealing with incineration and andfill. The microbial metabolism for the bio-drying process was similar to that for the omposting process. However, the former aimed at the water removal, while the latter ocused on the bio-stabilization and maturity of composted materials.Thermophilic strainl#,2#,3# and 4# were purified from composting sludge, ’hermophilic strain 2# was screened as the inoculant for bio-drying process of PMS, by omparing their effect to the reduction of moist content of paper mill sludge, determinating f their growth curve and the most appropriate growth temperature. The identification of train #2 was as follows:the 16S rDNA sequence of strain 2# and Geobacillus hermodenitrificans was 100% homologous, and the morphological, physiological and iochemical characteristics of strain 2# were most similar to Geobacillus hermodenitrificans.The bio-drying characteristics of PMS and its influencing factors were investigated in a elf-designed experimental equipment. The following factors, such as temperature, pH value, MC, volatile solids (VS), ATP content, and quantity of amylolytic bacteria and so on, were elected as the main factors to study the raw material mixture ratio and parameters during the (?)o-drying treatment process. Sawdust, starch, potassium phosphate monobasic and noculation were selected as the factors of the orthogonal experiments. The evaluating index (?)f orthogonal experiments was the reduction of PMS. The range analysis of orthogonal xperiments indicated that the order of the factors was:starch>sawdust>inoculation> (?)tassium phosphate monobasic. The optimal process parameters of bio-drying of PMS were s followings:starch (25g/500g), sawdust (40g/500g), inoculation (15.0mL/500g) and potassium phosphate monobasic (5g/500g), and the continuous ventilation rate was 0.056m3/(kg-h) and the materials were manually turned every 2 days. Bio-drying could be an effective treatment for the further dehydration and reduction of PMS. After the bio-drying, the MC and VS of materials were reduced by 11.9% and 8.9%. It provided more choices for the follow-up treatment or use of PMS. The factors, including the temperature, pH value, MC, VS, ATP content, and quantity of amylolytic bacteria could be interpreted as the evaluating parameters of the bio-drying of PMS. The temperature of bio-drying materials could quickly attain 47.8℃on the optimized condition, and with a bio-drying period of 7 days, the output MC and VS could reduce to 50.3% and 49.5%, respectively.

Related Dissertations

  1. Synthesis and Properties of Conducting Polyaniline-based Radar Absorbing Composites,TB34
  2. Studies on Optimal Moisture Contents and Physiological-Biochemical Characteristics on Seed Germplasm Conservation,S330
  3. Pharmacognosy and Quality Specification Studies on Leaf of Rehmannia Glutinosa Libosch.,S567.239
  4. Study on Influence of Preparation Process on Characters of PPy Conducting Thin Film Deposited on Porous Substrate,TM24
  5. Purification of carbon nanotubes and their composite particle research,TB383.1
  6. Experimental study of the fluidized-bed gasification and pyrolysis of biomass,TK6
  7. Study on the Coking Wastewater Using Iron-Carbon Inside-Electrol Yzation Method,X784
  8. Study on Water Movement during Combustion Process of Wood,S781
  9. Experiment Research on Surface Grinding of Ceramics with Coating Diamond Wheel,TG580.6
  10. Experimental Study on Thermodynamics of High Nitrogen Steels Refining with High Pressure and Bottom-blown Nitrogen,TF701
  11. The Study of the Synthesis of N-alkyacrylamide and Its Co-Polymerization,TQ316.3
  12. Study on the Analysis and Fluidization Decomposition of Calcium Sulfate in Phosphogysum,TQ177.3
  13. The Study on Recycling Treatment Technology of Papermaking Effluent and Life Sewage,X793
  14. Paper handling caustic lime mud and applied research,X793
  15. Studies on Polysilicic Acid-polyferric Flocculant for Papermaking Wastewater Treatment,X793
  16. Study on Biological Acidifieation PreciPitation of Lignin of Pulp Mill Wastewaters,X793
  17. Pilot Study on Micro-Electrolysis-UASB-BAF Technology for Middle-Stage Wastewater Treatment of Straw Pulp and Paper Making,X793
  18. Preparation and Adhibition of Chlorine Dioxide Bleaching Solution and Its Effects on Bleaching Wastewater,X793
  19. Biological Effects of Biomass Sand Stabilization Material Prepared with Lignosulfonate,X793
  20. The Research on Application of New Co-doped TiO2 in the Treatment of Paper Wastewater,X793

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > Light industrial waste disposal and comprehensive utilization > Paper Industry
© 2012 www.DissertationTopic.Net  Mobile