Farno Ehsan, Baudez Jean Christophe, Parthasarathy Rajarathinam, Eshtiaghi Nicky
a Civil Environmental and Chemical Engineering Discipline, School of Engineering, RMIT University , Victoria , Australia.
b Irstea, UR TSCF, Domaine des Palaquins , Montoldre , France.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2017 Apr 16;52(5):429-432. doi: 10.1080/10934529.2016.1270674. Epub 2017 Jan 13.
In a wastewater treatment process, energy is mainly used in sludge handling and heating, while energy is recovered by biogas production in anaerobic digestion process. Thermal pre-treatment of sludge can change the energy balance in a wastewater treatment process since it reduces the viscosity and yield stress of sludge and increases the biogas production. In this study, a calculation based on a hypothetical wastewater treatment plant is provided to show the possibility of creating a net positive energy wastewater treatment plant as a result of implementing thermal pre-treatment process before the anaerobic digester. The calculations showed a great energy saving in pumping and mixing of the sludge by thermal pre-treatment of sludge before anaerobic digestion process.
在废水处理过程中，能源主要用于污泥处理和加热，而在厌氧消化过程中通过沼气生产回收能源。污泥的热预处理可以改变废水处理过程中的能量平衡，因为它降低了污泥的粘度和屈服应力，并增加了沼气产量。在本研究中，提供了基于一个假设的废水处理厂的计算，以表明由于在厌氧消化器之前实施热预处理过程，创建一个净正能量废水处理厂的可能性。计算结果表明，在厌氧消化过程之前对污泥进行热预处理，可在污泥泵送和混合方面实现大幅节能。
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