Thermophilic and aerobia digestion (TAD) of sewage sludge was performed using Chamaecyparis obtusa, Cryptomeria japonica, and Pinus densiflora wood chips to confirm Physical and chemical properties of woody bulking agents affecting digestion efficiency. About 60% of digestion efficiency was attained by the C. obtusa and C. japonica wood chips, while that by P. densiflora was only 40%. Neither the difference of porous structure nor inclusion of anti-bacterial substances accounted for the different digestion efficiencies. P. densiflora wood chips have the highest acid leachability, and we finally confirmed that lowering pH to 6 was responsible for the lowest digestion efficiency.
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机译：污水污泥的高温和好氧消化（TAD）使用Chamaecyparis obtusa，Cryptomeria japonica和Pinus densiflora木片进行，以确认木质填充剂的物理和化学性质会影响消化效率。 C. obtusa和C. japonica木片的消化效率约为60％，而P. densiflora的仅为90％。多孔结构的差异或抗菌物质的夹杂均不能解释不同的消化效率。 P. densiflora木片具有最高的酸浸性，我们最终确认将pH降至6是最低的消化效率。
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