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10th International Rainwater Catchment Systems Conference
"Rainwater International 2001"
Mannheim, Germany - September 2001

Section 3: Rainwater: Quality Issues

Paper 3.9

Disinfecting Effects on Collected Rainwater and Cost Analysis

Ling Bo and Han Guangen
Institute of Health & Engineering
China Academy of Preventive Medicine
Beijing 100050
China
email: boling@163bj.com

Introduction

When rainwater is collected and pre-treated by sedimentation before entering water storage, the sense perception is nice. However, during rainwater collection, the water quality may deteriorate through the putrefaction of organic material in the water, or through growth of bacteria and other micro-organisms, in resulting to carry infectious diseases, such as higher morbidities of dysentery and diarrhoea among people drinking the cellar water then that drinking the well water as showed in Table 1 and 2. It is, therefore, necessary to disinfect the collected rainwater before use. To provide a simple and cost effective method, we have compared several solutions and analyze their feasibility, based on 10 cisterns and 10 cellars located in Zejiang Province and Gansu Province, respectively. Their characteristics, indicated in Table 3 and Table 4, include catchment route, material and size of the roof, material, storage volume and storage days of the cistern, rainwater collecting way, people numbers per household drinking water from the cisterns, numbers of flushing toilet, washing machine and shower per household, garden areas per household irrigated by the cisterns, as well as disinfecting method, if any.

PDF of full document (4pp, 31kb)


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