三阶段温度控制接种法对堆肥有机物质变化影响

为提高堆肥效率,利用生活垃圾,采用三阶段温度控制技术进行微生物接种堆肥试验,并对堆肥过程中有机物的动态变化进行分析.结果表明,在堆肥336 h,与普通接种法(CK)比较,三阶段温度控制接种法(TSCT)堆肥总有机碳(TOC)、水溶性有机碳(DOC)含量依次降低6.37%、6.57%;而腐殖质(HS)、胡敏酸(HA)、腐殖化指数(HI)分别增加了8.61%、16.75%、18.40%.通过对胡敏酸分子元素组成分析证实,堆肥后,普通接种法处理胡敏酸分子中C/H、O/C依次增加8.33%、6.25%;而三阶段温度控制法堆肥中胡敏酸C/H、O/C依次增加了18.33%、11.48%.以上结果表明,三阶段温度控制法可明显加快堆肥腐殖化进程,进而提高堆肥效率.

Effect of Using Three Stages Inoculation Controlled by Temperature on Organic Matter Transformation During Composting Process

In order to accelerate composting efficiency, municipal solid wastes (MSW) composting was conducted using three stages inoculation controlled by temperature (TSCT). At different composting phases, the samples were taken for the determination of organic matter transformation. Compared to routine inoculation method (CK), total organic carbon (TOC), dissolved organic matter (DOM) of TSCT decrease by 6.37%, 6.57%; and humic substance (HS), humic acid (HA), and humification index (HI) of TSCT increase by 8.61%, 16.75%, 18.40% at 336 hours of composting, respectively. Elemental analysis indicates C/H, O/C of HA molecule in CK increase by 8.33%, 6.25%; and those of TSCT increase by 18.33%, 11.48% at final stage of composting, respectively. These results all lead to the similar conclusion that TSCT would accelerate humification degree, and increase the efficiency of composting.