Lopez Zavala M A, Funamizu N, Takakuwa T
Hokkaido University, Department of Environmental Engineering, Sapporo, Japan.
Water Sci Technol. 2002;46(6-7):317-24.
In this paper, the Onsite Wastewater Differential Treatment System (OWDTS), a new approach for improving the traditional onsite wastewater treatment systems (OWTS), is proposed based on differential management and treatment of household wastewater effluents. Three fractions of household wastewater have been differentiated, reduced-volume blackwater, higher-load graywater and lower-load graywater. Based on this differentiation, different treatment processes required for each fraction are discussed. The procedure adopted for treatment of toilet wastes (reduced-volume blackwater) is shown. In the case of graywater, a sketch of treatment processes is provided. The OWDTS seems to be a new approach with higher potential for improvement of traditional OWTS, dry ecological sanitation, recycling of resources (toilet wastes and water), conservation of water resources, etc. Aerobic biodegradation of toilet wastes by using sawdust as a matrix is an essential treatment process of the OWDTS. Membrane technology seems to be the most effective process to treat higher-load gray water. Natural biodegradation of lower-load gray water by soil bacteria needs to be deeply studied.
本文基于对生活污水排放的差异化管理和处理，提出了现场污水处理差异系统（OWDTS），这是一种改进传统现场污水处理系统（OWTS）的新方法。生活污水被分为三类：减容黑水、高负荷灰水和低负荷灰水。基于这种分类，讨论了每一类所需的不同处理工艺。展示了处理厕所废物（减容黑水）所采用的程序。对于灰水，提供了处理工艺示意图。OWDTS似乎是一种具有更高潜力的新方法，可用于改进传统的OWTS、干式生态卫生、资源（厕所废物和水）回收、水资源保护等。以锯末为基质对厕所废物进行好氧生物降解是OWDTS的一个关键处理工艺。膜技术似乎是处理高负荷灰水最有效的工艺。低负荷灰水通过土壤细菌进行自然生物降解需要深入研究。
