自发热持续高温好氧堆肥碳、氮、腐殖酸变化过程

为了探索超高温自发热好氧污泥堆肥过程中有机碳、氮、腐殖酸变化过程，以1m³小堆体好氧堆肥的形式进行了深入研究.结果表明：水溶性COD从23.18mg/g增大到47.49mg/g，然后逐渐减少至30.67mg/g.总有机碳和TN在前7d减量最多，分别从207.45mg/g，45.40mg/g降到157.86mg/g，38.23mg/g，并在第35d趋于稳定.NH₄⁺-N从9.89mg/g逐渐增加到14.04mg/g，堆肥过程中NO₂^--N，NO₃^--N含量极低，总含量低于0.07mg/g，不足TN的0.2%.TN损失达82.87%，主要通过氨气挥发的途径.腐殖酸含量前7d从115.12mg/g迅速上升至214.11mg/g，第21d缓慢下降至154.47mg/g，趋于稳定.腐殖度E4/E6在3.49~4.23范围内变化，总体呈上升趋势，不适用于本工艺腐熟判定.

The transformation regularities of carbon,nitrogen and hunic acid during high temperature aerobic composting process

This paper studied the transformation regularities of key evaluation indicators, such as carbon, nitrogen and humic acid during ultra-high temperature aerobic composting process. The results showed that SCOD increased from 23.18mg/g to 47.49mg/g and then decreased to 30.67mg/g. TOC and TN respectively decreased from 207.45mg/g and 45.40mg/g to 157.86mg/g and 38.23mg/g in the previous seven days and almost remains constant after 35days. In addition, the content of NH₄⁺-N incrased from 9.89mg/g to 14.04mg/g, but the sum of NO₂^--N and NO₃^--N (about 0.07mg/g) was less than 2% of TN. The loss of TN was as high as 82.87%, and it mainly attributed to ammonia volatilization. Humic acid increased from 115.12mg/g to 214.11mg/g in previous seven days and alomost remains 154.47mg/g after 21days. Although E4/E6value ranged between 3.49 and 4.23, it showed an increasing trend in total. Hence, it is not suitable for maturity evaluation.