化学强化一级处理(CEPT)处理废水的可行性及优化——以黄石市为例

Q3 Chemical Engineering

Chemical Speciation and Bioavailability Pub Date : 2016-10-01 DOI:10.1080/09542299.2016.1247657

Qiulai He, Hongyu Wang, Congyuan Xu, Jing Zhang, Wei Zhang, Zhuocheng Zou, Kai Yang

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引用次数: 10

摘要

摘要在湖北省黄石市青山污水处理厂进行了化学强化一级处理(CEPT)去除碳、营养物和悬浮物(SS)的试验研究。通过比较聚合氯化铝、聚合氯化铝铁和聚合硫酸铁这三种无机化学混凝剂单独或与聚丙烯酰胺偶联的去除率，详细考察了该工艺处理废水的可行性，并通过单因素分析和正交试验设计对CEPT工艺条件进行了优化。本研究结果表明，CEPT是一种有效的废水处理方法，以PAFC为最佳混凝剂，对化学需氧量、总磷和SS具有优异的去除能力，最佳工作条件为pH 7.0，沉降时间15 min，混合和反应相流速梯度分别为174.80和15.56 s−1。混凝剂投加量与原水性质有关，对CEPT处理性能有决定性影响。然而，三种混凝剂的脱氮性能较差。

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Feasibility and optimization of wastewater treatment by chemically enhanced primary treatment (CEPT): a case study of Huangshi

Abstract Carbon and nutrients as well as suspended solids (SS) removal by chemically enhanced primary treatment (CEPT) were conducted in the Qingshan wastewater treatment plant in Huangshi, Hubei Province. Feasibility of this process for wastewater treatment were investigated in detail by comparing the removal performance of three inorganic chemical coagulants (polyaluminium chloride, polyaluminium ferric chloride [PAFC] and poly ferric sulfate) individual or couple with poly acrylamide, optimizing the conditions during CEPT by both single factor analysis and orthogonal test designs. The results of this study demonstrated that CEPT turned out to be an effective method for wastewater treatment, with PAFC as the optimal coagulant, which showed preeminent removal capacity for chemical oxygen demand, total phosphorus and SS. The optimal working condition could be at pH 7.0, settling time 15 min, and velocity gradient of 174.80 and 15.56 s−1 for mixing and reaction phase respectively. While the coagulant dosage depends on raw water attributes, which had a decisive effect on CEPT treatment performances. However, the three coagulants behaved poorly in nitrogen removal.

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来源期刊

Chemical Speciation and Bioavailability 环境科学-毒理学

CiteScore

1.62

自引率

0.00%

发文量

审稿时长

1 months

期刊介绍： Chemical Speciation & Bioavailability ( CS&B) is a scholarly, peer-reviewed forum for insights on the chemical aspects of occurrence, distribution, transport, transformation, transfer, fate, and effects of substances in the environment and biota, and their impacts on the uptake of the substances by living organisms. Substances of interests include both beneficial and toxic ones, especially nutrients, heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants. It is the aim of this Journal to develop an international community of experienced colleagues to promote the research, discussion, review, and spread of information on chemical speciation and bioavailability, which is a topic of interest to researchers in many disciplines, including environmental, chemical, biological, food, medical, toxicology, and health sciences. Key themes in the scope of the Journal include, but are not limited to, the following “6Ms”: Methods for speciation analysis and the evaluation of bioavailability, especially the development, validation, and application of novel methods and techniques. Media that sustain the processes of release, distribution, transformation, and transfer of chemical speciation; of particular interest are emerging contaminants, such as engineered nanomaterials, pharmaceuticals, and personal-care products. Mobility of substance species in environment and biota, either spatially or temporally. Matters that influence the chemical speciation and bioavailability, mainly environmentally relevant conditions. Mechanisms that govern the transport, transformation, transfer, and fate of chemical speciation in the environment, and the biouptake of substances. Models for the simulation of chemical speciation and bioavailability, and for the prediction of toxicity. Chemical Speciation & Bioavailability is a fully open access journal. This means all submitted articles will, if accepted, be available for anyone to read, anywhere, at any time. immediately on publication. There are no charges for submission to this journal.