Sewage Management of Sewage Truck Operators and Helminth Egg Contamination due to Sewage Sludge nearby Lampao Reservoir, Kalasin Province

Abstract

This study aims to determine sewage management of sewage truck operators and to determine contamination of parasitic eggs and worms from sewage sludge discharged nearby public or private areas in the area of the Efficiency Improvement of Lam Pao Reservoir Project. The population and samples were purposively selected from sewage pump truck operators nearby Lam Pao Reservoir. 14 sewage truck operators were selected along with 328 samples of sewage sludge of those selected operators discharged. Quantitative data were analyzed for amount, percentage and average. While, qualitative data analyzed for waste management model and details of the area where the sewage sludge was transported to. The results found that the sewage truck operators have been in the sewage pumping profession for an average of 5 years, providing sewage pumping services on average 4 trips/day, and having an average income of 22,143 baht/month. 64.3% of the samples persued this profession by learning from their relatives, which included preparing sewage trucks and equipment. They provided services as requested by customers and discharged to the public and private areas when the tank of sewage was full. The survey of areas of sewage discharge showed 10.4% contamination of helminth eggs, which 4.6% of them were Taenia saginata and 3.4% of the samples were liver fluke. Also, 2.4% of the samples were threadworms. The sewage discharge area were a pond or the free space of sugarcane farm. After 1-2 days of discharge, the areas would be dry, but strain left behind.