RESEARCH THE ABILITY OF FOG HARVESTING INTO CLEAN WATER FROM SOME NATURAL YARNS

Abstract

The Nouthern mountainous areas of Vietnam have been covered by thick fog-water all year round. Vietnam also has many types of natural yarns that are capable of absorbing moisture, keeping water such as hemp yarn, jute yarn, coconut yarn, etc. This research on ability of fog harvesting into clean water from natural yarns is neccessary due to the limintaion of clearnind water for the ethnic minority group. The results of laboratory fog harvesting from hemp yarn, jute yarn, coconut yarn show that in three types, hemp yarns are capable of obtaining the most water is 238.6 mL/24h at a temperature of 20^oC, humidity from 90 - 98% with 1.5x1.5 cm mesh size, net area is 0.033 m². The results of water quality analysis showed that the mist collection water in the laboratory after a day is completely usable for domestic water according to QCVN 02:2009/BYT but cannot be used for water Eating according to QCVN 01:2009/BYT, water collected in mist after three days and seven days of water quality with coliform content exceeds the permitted standard and cannot be used for drinking water.