This study aims to apply fecal sterols as a chemical indicator to track feces contamination sources in the canals in Bangkok. The sewage and canal sediments were examined during the dry season. Fecal sterols in the canals were evaluated over a one-year period (2011–2012) for the selected sterol compounds. Several factors including season, canal water levels, rainfall data, and sewage were correlated to fecal contamination. The highest concentrations of cholesterol (CHR) (8.321 μg/L), coprostanol (CPN) (6.490 μg/L), and cholestanol (CHN) (1.205 μg/L) in discharged sewage were found from the community near Samata Amonmak bridge. Maximum yearly average fecal sterol contents observed in the canal sediments were: CHR (12.478 μg/g), CHN (10.782 μg/g), and CPN (16.903 μg/g). They indicate high fecal pollution both from human and warm-blooded animals such as dogs' and birds' feces. The water level in canals and rainfall intensity influenced changes in fecal sterol contents. Suspended solids in the canal water during summer were correlated with the sterol contents. Overall, it can be summarized that the studied canals were highly polluted with organic matter and enteric bacteria. Human feces from the discharged sewage were the major source of fecal contamination in Ong-Ang and Bang-Lumphu canals.
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Case Study: JWC Grinder saves Las Vegas apartment complex $20,000 in 90 days!
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In 2014 DEVISE ENGINEERING S.A. participated in an International Tender to Design and Build seven (7) advanced MBR Package Sewage Treatment Plants for “A.A.W.S.A” (Addis Ababa Water and Sewage Authority) and won the project over strong competition. The aim was to provide an efficient and cost effective solution for the treatment of sewage originating from the new decentralized condominiums in the capital of Ethiopia, Addis Ababa, with the purpose of water reuse for irrigation.DEVISE is building...
Organic Fertilizer Production Plant-Design and Process
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Micropollutant pathways were studied for the Swist river basin (Western Germany). The aim was to verify the effectiveness of a monitoring approach to detect micropollutants entering the river. In a separate sewer system, water was frequently found to be contaminated with micropollutants. Improper connections of sewage canals to the stormwater network seemed to be the cause of pollution. Wastewater treatment plants (WWTPs) exerted the largest influence on micropollutants for the receiving river. During a flu...