混合堆肥过程中容重的层次效应与动态变化_陈同斌.pdfVIP

25 5 V ol. 25, No. 5 2004 9 ENV IRON MENTA L SCIEN CE Sep. , 2004 , , , ( , 100101) : : 082gcm- 3 066g cm- 3 , ; 05 8gcm- 3, ; 054gcm- 3 , . , , . , . , . , . : ; ; ; ; : X 705; X 7 13 : A : 0250- 330 1( 2004) 05- 0 143-05 Stratification of Bulk Density and Its Dynamics in the Process of Co-Composting CHEN T ong- b n, L U O We , GAO D ng, ZHEN Guo- d ( Laboratory of Env r onmental Remed at on, Inst tute of Geograph c Sc ence and N atural Resources Research, Ch nese A cademy of Sc ences, Bej ng 100101, Ch na) Abstract: Co- compost ng of sew age sludg e and p g manur e w as stud ed. A t the stag es of temper ature start ng and h gh temperature, - 3 - 3 t he bulk dens ty w ere 082gcm and 066 gcm , r espect vely , but ox ygen n the p le at each stage w as enoug h for the m croor- gan sm to l ve on . At the stage of cool ng , the bulk dens ty w as 058gcm- 3 , w h ch made aerat on better. T he bulk dens t y w as 054g cm- 3 at the stage of matur ng w hen aer at o n s best . T he str at f ed eff ect of bulk dens ty occurred, near the door of the p le at t he stages of start ng and h gh temperature, almost all par ts of t he p le at the stage of cool ng , ho w ever , t w eakened at the stage of t he matur ng. T he depth had remarkable nfluence upon the bulk dens ty of compost , by the ax s of the p le at t he stage of the start- ng, near the nner w all at the stage of h gh temperature, for the w hole p le at the stage o f cool ng, and near t he door and ax s at the stag e of matur ng . T he door had s gn f cant eff ect on the bulk dens ty for both stages of start ng and matur ng . T he bulk dens ty n- creased w th the depth of the p le at every stage of compost ng. Dy nam cs of bulk dens ty met w th tw o- order k net c equat on. Key words:bulk dens t