Feasibility Research on Fermenting Sludge into Garden Nutritional Soil by Using Aerobic-Anaerobic Alternative Method

Abstract:

A dewatered sludge was treated in three barrel fermentation systems to produce garden nutritional soil in aerobic, anaerobic or aerobic-anaerobic alternative method respectively. Varitation of fermentation temperature, number of coliform groups, available nitrogen, available phosphorus, total potassium, humus content and other indexes under different fermentation processes were studied. Results showed that the sludge in aerobic method has the characteristics of high temperature, warming fast and killing coliform effectively, but having a high degree of mineralization of organic matter and a low degree of available nitrogen, phosphorus and humus, while in anaerobic method on the contrary. Aerobic-anaerobic alternative method raised the available nitrogen, phosphorus, total potassium and humus content, meeting the demand of harmless, nutrition and humification indexes. In energy consumption perspective, the alternative method save energy by 75%. Summer and winter tests showed that alternative method for fermentation sludge into garden nutritional soil is feasible.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2205-2210
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2205
• Online since: September 2013
• Authors: Xin Rui Feng*, Shao Jie Jiang, Yun Xiao Liu
• Keywords: Aerobic-Anaerobic Alternative Method, Dewatered Sludge, Garden Nutritional Soil

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