Septien S, Mirara S W, Makununika B S N, Singh A, Pocock J, Velkushanova K, Buckley C A
Pollution Research Group, University of KwaZulu-Natal, Howard College, 4041, Durban, South Africa.
Chemical Engineering, University of KwaZulu-Natal, Howard College, 4041, Durban, South Africa.
J Environ Chem Eng. 2020 Feb;8(1):103652. doi: 10.1016/j.jece.2019.103652.
This work explores the effect of drying on the chemical and physical properties of faecal sludge, and evaluates the reuse potential of the dried material. For the purpose of this study, the nutrient content, calorific value and thermal properties were determined for faecal sludge samples dried at different moisture contents and under different drying and operating conditions. The results show that drying does not affect the nutrient content and calorific value, but it induces modifications of the chemical form of nitrogen and the thermal properties. The dried product was demonstrated to be suitable for reuse as an agricultural product and biofuel. In agriculture, dried faecal sludge could be used as an organic fertilizer with a particularly high phosphorous content and a slow release of nitrogen and phosphorous. As a biofuel, dried faecal sludge would have similar characteristics as wood.
这项工作探讨了干燥对粪便污泥化学和物理性质的影响，并评估了干燥后材料的再利用潜力。为了本研究的目的，测定了在不同水分含量以及不同干燥和操作条件下干燥的粪便污泥样品的养分含量、热值和热性质。结果表明，干燥不会影响养分含量和热值，但会引起氮的化学形态和热性质的变化。干燥后的产品被证明适合作为农产品和生物燃料再利用。在农业中，干燥的粪便污泥可用作有机肥料，其磷含量特别高，氮和磷的释放缓慢。作为生物燃料，干燥的粪便污泥将具有与木材相似的特性。
