紫外线消毒稳定塘出水：土地限制地区的可行替代方案。

UV disinfection of stabilization pond effluent: a feasible alternative for areas with land restriction.

机构信息

Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Brazil.

出版信息

Water Sci Technol. 2012;65(2):247-53. doi: 10.2166/wst.2012.363.

DOI:10.2166/wst.2012.363

Abstract

The purpose of this research was to determine the feasibility of a UV photoreactor for the disinfection of effluent from a polishing pond following a UASB reactor treating domestic wastewater. For this, a 20 mm diameter photoreactor (20.7 litre volume) equipped with four 30 W submerged low-pressure mercury arc lamps was used. Three tests with contact times and doses ranging from 45 to 90 s and from 16.9 to 31.3 mW s cm(-2) were carried out. Inactivation of total coliforms and Escherichia coli varied from 2.6 to 3.4 log-units, even with the presence of suspended solids in the range of 87 to 102 mg L(-1). These results have shown that UV radiation disinfection of pond effluents can be a feasible alternative in areas with land restriction.

摘要

本研究旨在确定 UV 光反应器在 UASB 反应器处理生活污水后的抛光池废水消毒中的可行性。为此，使用了一个直径为 20 毫米的光反应器（20.7 升体积），配备了四个 30 W 浸没式低压汞弧灯。进行了三次接触时间和剂量范围为 45 至 90 秒和 16.9 至 31.3 mW s cm(-2)的试验。即使悬浮固体在 87 至 102 mg L(-1)范围内，总大肠菌群和大肠杆菌的灭活率也从 2.6 到 3.4 个对数单位不等。这些结果表明，在土地有限的地区，UV 辐射消毒池塘废水是一种可行的替代方法。