Abstract
In order to investigate COD removal efficiency and production capacity of energy, the anaerobic sludge bed reactor with high diameter ratio of 10 was used to treat the thermal dehydration wastewater (TDW) of sludge. The experiment was divided into 7 stage, the results showed that on the condition of the acclimated sludge, the reactor would be stable after 25 days; then the maximum removal rate of COD was up to 68%, the maximum amount of Nissan CH4 was 575.53 ml/L, and methane production ratio was 104.05ml/(g CODd). The concentration of ammonia nitrogen (NH4+-N) was the main factor affected the stable operation of the reactor. When the concentration of NH4+-N reached 1.5g/L, the inhibition phenomenon to methanogenic bacteria appeared. And when it was up to 2.4g/L, the methanogenic bacteria were seriously inhibited. The optimal sludge loading of the experiment was 0.10∼0.24 kg COD/(kg Sludged), and the optimal volume load was 5∼13 kg COD/(m3·d).
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