Characteristics of Municipal Wastewater in Relation to Activities Surrounding Bangpakok Fresh Market

The activities of fresh markets produce considerable quantities of wastewater, characterized by high organic concentrations. This wastewater is collected and conveyed through the sewer system. The objectives of this research were to investigate the correlation between wastewater characteristics and market-area activities and to evaluate pipe leakage based on a quantitative analysis of wastewater in the sewer. The study focused on the combined sewer system surrounding Bangpakok Fresh Market, with sampling points located downstream of the sewer network. For one day, twenty-four-hour flow patterns based on market activity were monitored. The wastewater characteristics were then measured daily for 30 days. The Manning Equation was used to calculate wastewater flow rates in the pipe from data on manhole water depth. Manning's roughness coefficient was 0.071, which is high due to the accumulation of waste inside the pipe. The maximum peaking factor for the daily flow rate was only 1.06, indicating that the flow rate was not dominated by fresh market activity. There is a baseflow rate of up to 80 L/s. This could be the result of defective pipe infiltration flow. COD was analyzed using the APHA standard method to determine the wastewater quality. The BOD:COD ratio was 0.55, within the easily biodegradable organic matter range. Based on the findings, it can be concluded that defects in the sewer line can be identified through quantitative analysis of the wastewater flowing within the sewer system.