biogas production in thai

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    (.)

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    - - - -

    -

    -

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    (Biogas)

    (Biogas)

    (Anaerobic Digestion)

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    3

    1(Hydrolysis)

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    2(Acidogenesis)

    (Volatile acid) (acid former) (Acetic acid) (Propionic acid)

    3 (Methanogenesis)

    (CH4) (CO2) (H2S)

    (N2) (H2)

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    50-75

    (CO2) 36-39

    (H2) (H2S) 1-3

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    1

    ( 21 )

    (LPG)0.46 .

    0.60

    0.55

    1.2 kWh

    1.5 .

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    (Temperature)

    3 - Phychrophillic (5-15C)

    - Mesophillic

    (35-37

    C)- Thermophillic (50-55C)

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    - (pH) pH 6.5-7.5 5 4.5

    (Alkalinity) - 1,000-5,000/ (CaCO3)

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    (Volatile Acid)

    pH 2,000/ 5,000/

    (Nutrients)

    COD:N:P 100:2.2:0.4 BOD:N:P 100:1.1:0.2

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    (Inhibiting and Toxic Substances)

    (Mixing)

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    (1) (Floating drum digester)

    ..2519

    http://4.bp.blogspot.com/_AdU3UvQ0iVk/SkzUA36SdDI/AAAAAAAACAY/GMe9WoiwITQ/s1600-h/DSC00015.jpg
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    (2) (Separate Floating drum digester)

    . 2

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    (3)

    . ..2522

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    (4) (Fixed dome digester)

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    (5) UASB : Up-Flow Anaerobic Sludge Blanket

    2 2-5 .

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    (6) H-UASB (High suspension solid-Up-Flow Anaerobic

    Sludge Blanket)

    UASB

    Buffer tank PE Buffer tank UASB

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    (7) (Plug Flow digester)

    Channel digester

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    (8) Mini CD ( Mini Channel Digester)

    100 ..

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    (9) PVC

    PVC 8 .. 2 ./

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    (10) Covered lagoon

    Plug Flow

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    (11) . 1

    10 ../

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    (12) . 2

    2 ../

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    (1)

    Upflow Anaerobic Sludge Blanket (UASB)

    2 (Sludge Bed) 2 SludgeBlanket (Gas-Solid Separator)

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    (2) (Anaerobic Fixed Film, AFF)

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    (3) Completely Stirred Tank Reactor (CSTR)

    (Mixing System) (HRT)

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    (4) Anaerobic Baffle Reactor (ABR)

    0.2-0.4 /

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    (5) Modified covered Lagoon (MCL)

    High Density Polyethylene (HDPE) (PVC)

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    - Hot Oil Burner StreamBoiler

    -

    -

    ()

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    - - VSPP -

    -

    - -

    -

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    - -

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    BGG. = Q*COD/1000*Eff. COD removed*Gas Yield

    BGG. ( Biogas Generate) = (./)Q = (/)

    COD = COD (./)

    Efficiency COD removed = COD (%)

    1,000 = (1,000 .) ..Gas yield = COD

    ( 0.35 ./. COD/)

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    . 10 ./ COD9,000 ./ COD 80% Q = 10 ./COD = 9,000 ./

    Eff. COD removed = 80 % BGG. = 10*9,000/1,0000.80 *0.35 ./ 25.20 . / 60 % 25.20/0.60 42 . /

    1 . 200 10,000 (10..) = 50 .1. 0.85 .. 50 . = 50*0.85 = 42.50./

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    (.)

    (..)

    12 13.5 .2

    30 50 Fixed dome60 70 .1

    60 100 Fixed dome

    60 100 CD junior

    120 200 CDUA

    180 300 CDUA

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    BGG. = Q*COD/1000*Eff. COD removed*Gas Yield *%

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    Q = 2,000 ../

    COD = 18,000 ./

    Gas yield = 0.35 ../.COD/

    Efficiency COD removed 80%

    60%BGG = 2,000*18,000/1000*80/100*0.35/60%

    16,800 ../

    9,240/

    200 / 2,000 ../ COD 18,000 ./ ../

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    .. .

    (11 ..) 50 . .4 .5 .6

    30 .

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    3

    . .

    3 3 200

    200 3

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    " 5

    15.45 . 22 .. ... .. .

    5

    1 . .

    ... ...

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    " " 200 50 . 3 12 5

    ..

    4

    ..

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