Yuhui Mou , Lei Zhong , Wencong Liu , Guangyuan Jin , Feihu Song , Zhenfeng Li , Jinbiao Teng , Chunfang Song
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引用次数: 0
Abstract
Lightweight and stable treatment of sludge is urgently needed because of its dual characteristics of pollution and resources. The decanter centrifuge plays a crucial role in sludge treatment as highly efficient solid–liquid separation equipment. This paper extensively discusses the impacts of the sludge solid density, sludge concentration, and drum rotation speed on the separation performance of a decanter centrifuge through numerical simulation. Based on univariate analysis results, a supervised learning algorithm is employed to quantify the coupling effect of the sludge properties and drum speed on the separation efficiency by comparing the prediction accuracies of three different surrogate models. The optimum drum rotation speed for the decanter centrifuge to achieve the desired separation efficiency was determined for different sludge properties. At high speeds (>2500 r·min−1), the drum rotation speed had the greatest effect on the separation efficiency, whereas at lower speeds (<2500 r·min−1), the sludge solid density became the predominant factor affecting separation efficiency. When the speed is >3000 r·min−1, the separation efficiency begins to decline. This study offers a fresh perspective for investigating flow characteristics and regulating separation efficiency in decanter centrifuges used for sludge dewatering.
期刊介绍:
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies