مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

video

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

sound

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Version

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

View:

398
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Download:

209
مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Cites:

Information Journal Paper

Title

EFFECTS OF AERATION RATE AND DETENTION TIME ON THERMOPHILIC AEROBIC DIGESTION OF MIXED SLUDGE AND ITS DEWATERABILITY

Pages

  105-111

Keywords

OXIDATION-REDUCTION POTENTIAL (ORP) 
SPECIFIC RESISTANCE TO FILTRATION (SRF) 

Abstract

 Thermophilic aerobic digestion (TAD) is a possible alternative for rapid sludge degradation and producing CLASS A BIOSOLIDs. Aeration rate and detention time are two of the important parameters in TAD processes due to rapidly growing thermophilic bacteria population, limited solubility of oxygen at high temperatures and the need to prevent cooling of TAD process. Also the current knowledge and understanding of dewatering TAD biosolids are limited and incompelet.The objectives of this study were to investigate the effects of various aeration rates and detention time on some characteristics of mixed sewage sludge. Four glass-cylindrical digesters with 7 liters of sludge in each, placed in a water bath and were operated at 55 0c with the aeration rates of 2.14, 3.00, 3.86 and 4.71 volume of air per volume of sludge per hours. It was found the increase in aeration rate decreased the required detention time in order to meet the Class A sludge regulations to reduce vector attraction. The values of Oxidation-Reduction Potential (ORP) were changed from negative values to positiv ones and the values of pH were increased from around neutral to slightly basic, but this increases were occured at different detention times. TAD affected dewaterability of mixed sewage sludge and produced biosolids with higher specific resistance to filtration (lower dewaterability) than undigested sludge. Thermophically digested sludge has a good setteling behavior and air drying on sand bed.

Cites

  • No record.

    • References

    Cite

    APA: Copy

    MOVAHEDIAN ATAR, H., BINA, B., & MOEINIAN, KH.. (2005). EFFECTS OF AERATION RATE AND DETENTION TIME ON THERMOPHILIC AEROBIC DIGESTION OF MIXED SLUDGE AND ITS DEWATERABILITY . INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), 2(2), 105-111. SID. https://sid.ir/paper/284909/en

    Vancouver: Copy

    MOVAHEDIAN ATAR H., BINA B., MOEINIAN KH.. EFFECTS OF AERATION RATE AND DETENTION TIME ON THERMOPHILIC AEROBIC DIGESTION OF MIXED SLUDGE AND ITS DEWATERABILITY . INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST)[Internet]. 2005;2(2):105-111. Available from: https://sid.ir/paper/284909/en

    IEEE: Copy

    H. MOVAHEDIAN ATAR, B. BINA, and KH. MOEINIAN, “EFFECTS OF AERATION RATE AND DETENTION TIME ON THERMOPHILIC AEROBIC DIGESTION OF MIXED SLUDGE AND ITS DEWATERABILITY ,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), vol. 2, no. 2, pp. 105–111, 2005, [Online]. Available: https://sid.ir/paper/284909/en

    Related Journal Papers

  • No record.

    • Related Seminar Papers

  • No record.

    • Related Plans

  • No record.

    • Recommended Workshops





    Move to top
    telegram sharing button
    whatsapp sharing button
    linkedin sharing button
    twitter sharing button
    email sharing button
    email sharing button
    email sharing button
    sharethis sharing button