Nikaeen Mahnaz, Nafez Amir Hossein, Bina Bijan, Nabavi BiBi Fatemeh, Hassanzadeh Akbar
Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran.
Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Environmental Health Engineering, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Waste Manag. 2015 May;39:104-10. doi: 10.1016/j.wasman.2015.01.028. Epub 2015 Feb 26.
The objective of this work was to study the evolution of physico-chemical and microbial parameters in the composting process of sewage sludge (SS) with pruning wastes (PW) in order to compare these parameters with respect to their applicability in the evaluation of organic matter (OM) stabilization. To evaluate the composting process and organic matter stability, different microbial activities were compared during composting of anaerobically digested SS with two volumetric ratios, 1:1 and 3:1 of PW:SS and two aeration techniques including aerated static piles (ASP) and turned windrows (TW). Dehydrogenase activity, fluorescein diacetate hydrolysis, and specific oxygen uptake rate (SOUR) were used as microbial activity indices. These indices were compared with traditional parameters, including temperature, pH, moisture content, organic matter, and C/N ratio. The results showed that the TW method and 3:1 (PW:SS) proportion was superior to the ASP method and 1:1 proportion, since the former accelerate the composting process by catalyzing the OM stabilization. Enzymatic activities and SOUR, which reflect microbial activity, correlated well with temperature fluctuations. Based on these results it appears that SOUR and the enzymatic activities are useful parameters to monitor the stabilization of SS compost.
这项工作的目的是研究污水污泥（SS）与修剪废弃物（PW）堆肥过程中物理化学和微生物参数的演变，以便根据这些参数在评估有机物（OM）稳定性方面的适用性进行比较。为了评估堆肥过程和有机物稳定性，在厌氧消化的SS堆肥过程中，比较了两种体积比（PW:SS为1:1和3:1）以及两种曝气技术（包括曝气静态堆垛（ASP）和翻抛条垛（TW））下的不同微生物活性。脱氢酶活性、荧光素二乙酸酯水解和比氧摄取率（SOUR）被用作微生物活性指标。将这些指标与传统参数（包括温度、pH值、水分含量、有机物和碳氮比）进行了比较。结果表明，TW方法和3:1（PW:SS）的比例优于ASP方法和1:1的比例，因为前者通过催化OM稳定化加速了堆肥过程。反映微生物活性的酶活性和SOUR与温度波动密切相关。基于这些结果，SOUR和酶活性似乎是监测SS堆肥稳定性的有用参数。
