A study of Rainfall and Sewage Reclamation and Reuse for the Newly-Bulit Residential Community
Date Issued
2005
Date
2005
Author(s)
Hsu, Wen-Shuo
DOI
zh-TW
Abstract
Water is the essential material to sustain life, especially the source of living. The household water can be divided into water three categories: purification system, grey water system and sewage system, “water purification system” is the tap water ; “sewage system” refers to the sewage produced by daily life in general, which can be divided into the two sections: (1) excrement and urine sewage, (2) lower pollution sanitary sewage, the latter refers to waster water from , bathroom and other life produced ; while “grey water system” signifies that the water quality lies between tap water and sewage, which can be utilized effectively after the sanitary sewage is properly processed.
By utilizing centralized system to process sanitary sewage has specific advantage, not a common use method nonetheless. Decentralized sanitation and reuse (DESAR) is the newly developed tactics of water resource management abroad. This research adopts the concept of dispersing process system to initiated continuous utilization and innovation procedure for water resource. Two alternative schemes are proposed: one is the rainwater catchment system and the other is the constructed wetland with rainwater catchment system; aspects of economic benefits, technical operation and additional value are well discussed in this text. Furthermore, the theme of this thesis displays the method of planning in advance to replace post-improvements, which shall be the future reference basis for the newly-built residential community to reach the sustainable management for the community water resource.
The rainwater catchment and water supply facilities are designed according to the high intensity and rainfall in case study 1 (scheme 1) utilizes the rainwater in household toilet, cleaning and sprinkling usage; 352 tons of rainwater per household can be saved for reuse annually; the cost of rainwater retrieve is 8.7NTD/ton; the earnings-price ratio will be 1.03 if tap water is 9NTD/ton. General sanitary sewage is recycled by types and pipelines in case study 2 (scheme 2) processed by the community constructed wetland with the features of low pollution, energy saving and environmental education for reuse in the household toilet, cleaning and sprinkling usage; to store the rainwater for wetland dilution or water source supplement in addition. This research result shows that the cost is relatively lower than the sewage treatment facilities for building fabrication; the necessary technical operation and maintenance management are easier with the significant meanings of increasing water resource and reducing expenditure.
Subjects
生活污水
人工溼地
雨水貯留
分散式污水處理與再利用
household sewage
constructed wetland
rainwater catchment system
decentralized sanitation and reuse
Type
thesis
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