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首页> 外文会议>Your bridge to the future >When It's Time to Choose: A Discussion of Conventional Treatment, Ballasted Flocculation, Upflow Clarification, Dissolved Air Flotation, and Membranes
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When It's Time to Choose: A Discussion of Conventional Treatment, Ballasted Flocculation, Upflow Clarification, Dissolved Air Flotation, and Membranes

机译：何时选择：常规处理，压载絮凝，上流澄清，溶解气浮和膜的讨论

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摘要

Many small- to mid-size utilities are planning to upgrade their water treatment plants both to expand capacity and to meet new regulations. Many of these utilities currently use a conventional treatment scheme, and, as these utilities now consider modifications to their plants, the question often asked is whether to change the treatment scheme to achieve a higher quality water at a more cost-effective price. This paper will discuss the advantages and disadvantages that these utilities should consider in evaluating treatment processes, including conventional treatment (both with and without enhanced coagulation), ballasted flocculation, upflow and reactor clarifiers, dissolved air flotation, and membrane treatment.rnIn evaluating these processes, many decision factors will be considered, including raw water quality, treatment effectiveness, ability to meet existing and proposed regulations, capital costs, operation and maintenance costs, ease in retrofit, and life-cycle costs.rnAs a model, a decision scheme has been set up for an example town whose treatment plant is in the process of expansion. The town's existing plant utilizes conventional treatment, and, due to certain resource limitations and raw water quality parameters, the town would like to evaluate different options for expansion.
机译：许多中小型公用事业公司正计划升级其水处理厂，以扩大产能并满足新法规。这些公用事业公司中的许多公司目前都使用常规的处理方案，并且由于这些公用事业公司现在正在考虑对其工厂进行改造，因此经常提出的问题是，是否要更改处理方案，以更经济的价格获得更高质量的水。本文将讨论这些公用事业公司在评估处理过程时应考虑的优缺点，包括常规处理（有和没有增强凝结），压载絮凝，上流和反应器澄清池，溶解气浮和膜处理。因此，将考虑许多决策因素，包括原水质量，处理效果，满足现有法规和拟议法规的能力，资本成本，运营和维护成本，简化改造以及生命周期成本。设立了一个示例城镇，该城镇的污水处理厂正在扩建中。该镇的现有工厂采用常规处理，并且由于某些资源限制和原水质量参数，该镇希望评估各种扩展方案。

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