Design of Centralised Wastewater Treatment Facility for Perinthalmanna Municipal Town in Kerala

Perinthalmanna is a fast developing Municipality in Malappuram District in Kerala, India and is an urban centre for the peri urban areas including rural areas of Palakkad District. It became a Municipality in 1990 consisting of two villages namely Perimthalmanna and Pathaikkara with an aerial extent of 34.41 Km2 and 34 Municipal wards. The present project was undertaken to design a efficient centralized wastewater treatment facility for the most urbanized area of municipality. In this regard, as part of the project, assessment of the present conditions of the sewerage and sanitation system was conducted by surveying the areas. An estimation of the daily water requirement, available water sources and daily total water usage was conducted. Survey of the houses in the area was conducted with the help of a detailed questionnaire prepared as part of the project. Surveying of the area was performed and map of the area showing the land contours was prepared. The contour map was used to select and design the gradient and slope of the area for the purpose of laying sewer lines. Hydraulic analysis and design of treatment technologies are done using spreadsheet programme as per CPHEEO guidelines. The sewer lines were aligned to ensure economic transport of sewerage to the treatment plant. Sewer pipe materials were selected along with fittings and joints for the sewerage system.