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2016 | 25 | 1 |
Tytuł artykułu

Impacts of dissolved oxygen and initial sludge concentrations on aerobic stabilization of sewage sludge

Autorzy
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Impacts of dissolved oxygen (DO) and initial sludge concentrations on aerobic digestion for sewage sludge treatment were studied without adding alkalis. The MLVSS removal efficiencies were 50% and 47% in 20 days when DO concentrations were about 5.0 and 7.0 mg/L, respectively. Value of pH increased slightly in the first 6 days and then dropped constantly. The decrease of MLVSS appeared first quick back slow trend during the process and the OUR declination was similar. At the same DO level of 5.0 mg/L, the lower initial sludge concentration favored the efficiency of sludge stabilization. Both TN and TP of the supernatant were continually increasing and the ultimate concentrations were three to four times the initial concentrations. Results obtained from the present work could provide basic information for the aerobic sludge treatment process.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
25
Numer
1
Opis fizyczny
p.153-157,fig.,ref.
Twórcy
autor
  • School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China
autor
  • School of Civil Engineering, Wuhan University, Wuhan 430072, China
autor
  • School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China
autor
  • School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China
autor
  • School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China
Bibliografia
  • 1. MARTÍN J., SANTOS J.L., APARICIO I., ALONSO E. Pharmaceutically active compounds in sludge stabilization treatments: Anaerobic and aerobic digestion, wastewater stabilization ponds and composting. Science of the Total Environment, 503, 2015.
  • 2. LIU S., ZHU N., LI L.Y. The one-stage autothermal thermophilic aerobic digestion for sewage sludge treatment: Stabilization process and mechanism. Bioresource Technology, 104, 2012.
  • 3. BERNARD S., GRAY N.F. Aerobic digestion of pharmaceutical and domestic wastewater sludges at ambient temperature. Water Research, 34, 3, 2000.
  • 4. HAYES D., IZZARD L., SEVIOUR R. Microbial ecology of autothermal thermophilic aerobic digester (ATAD) systems for treating waste activated sludge. Systematic and Applied Microbiology, 34, 2, 2011.
  • 5. SONG L., ZHU N., YUAN H., HONG Y., DING J. Enhancement of waste activated sludge aerobic digestion by electrochemical pre-treatment. Water Research, 44, 15, 2010.
  • 6. ICHINARI T., OHTSUBO A., OZAWA T., HASEGAWA K., TEDUKA K., OGUCHI T., KISO Y. Wastewater treatment performance and sludge reduction properties of a household wastewater treatment system combined with an aerobic sludge digestion unit. Process Biochemistry, 43, 7, 2008.
  • 7. USHER S.P., SPEHAR R., SCALES P.J. Theoretical analysis of aggregate densification: Impact on thickener performance. Chemical Engineering Journal, 151, 1, 2009.
  • 8. APHA A.W. Standard methods for the examination of water and wastewater. Washington D.C,USA: American Public Health Association, 2005.
  • 9. GANESH R., BALAJI G., RAMANUJAM R.A. Biodegradation of tannery wastewater using sequencing batch reactor - Respirometric assessment. Bioresource Technology, 97, 15, 2006.
  • 10. FILALI-MEKNASSI Y., TYAGI R.D., NARASIAH K.S. Simultaneous sewage sludge digestion and metal leaching: effect of aeration. Process Biochemistry, 36, 3, 2000.
  • 11. AHLBERG S., MEINKE M.C., WERNER L., EPPLE M., DIENDORF J., BLUME-PEYTAVI U., LADEMANN J., VOGT A., RANCAN F. Comparison of silver nanoparticles stored under air or argon with respect to the induction of intracellular free radicals and toxic effects toward keratinocytes. European Journal of Pharmaceutics and Biopharmaceutics, 88, 3, 2014.
  • 12. UGWUANYI J.O., HARVEY L.M., MCNEIL B. Effect of digestion temperature and pH on treatment efficiency and evolution of volatile fatty acids during thermophilic aerobic digestion of model high strength agricultural waste. Bioresource Technology, 96, 6, 2005.
  • 13. SILVA M.A., MATER L., SOUZA-SIERRA M.M., CORREA A.X., SPERB R., RADETSKI C.M. Small hazardous waste generators in developing countries: use of stabilization/solidification process as an economic tool for metal wastewater treatment and appropriate sludge disposal. Journal of Hazardous Materials, 147, 3, 2007.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-2e551c18-9e78-44d1-ab86-7474fec9509b
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