Effects of the Amount of Additives on Sludge Composting in Northern Cold Regions

Abstract:

Under laboratory conditions, by determining the appropriate proportion added to sludge, composting experiments were carried out to achieve the best results in cold climates. Aerobic sludge composting reactors adopted positive forced aeration for static pile. Additives and sludge were mixed at the volume ratios of 2:1 and 3:1 respectively. By investigating the change laws of temperature, moisture, organic matter, pH, total phosphorus and ammonium, the maturity of sludge composting was evaluated. During the composting at the volume ratio of 2:1, the temperature could rise quickly, the moisture and organic matter declined apparently, and the total phosphorus content increased significantly. Besides, the rest of the indicators all met the maturity standards. Under the condition, sewage sludge could be converted to organic fertilizer in favor of the growth of crops through composting process.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 821-825
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.821
• Online since: February 2014
• Authors: Ke Zhao*, Yu Zhang, Yu Yan, Bei Wang
• Keywords: Additive, Composting, Maturity

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DOI: 10.1016/s0141-0229(02)00012-1