Skip to main content

STUDY ON LIFE CYCLE EVALUATION OF SEWER COLLECTION SYSTEMS BY COST, ENERGY AND CARBON EMISSION

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

This paper compares cost and environmental evaluation methods of sewer collection systems and proposes that a combined cost and environmental evaluation method should be used. The model area is 20ha (500m×400m), flat, with good soil conditions and with a groundwater level of 2.0m below ground. The systems compared in this study are 1) Gravity-only (G-1), 2) Gravity with pumping stations (G-2), 3) Pressure Sewer System (PSS), and 4) Vacuum Sewer System (VSS). The methods used to evaluate the systems are a) Installation and Operation / Maintenance Costing, b) Life Cycle Costing, c) Life Cycle Energy Assessment and d) Life Cycle C-CO2 Emission Assessment. Construction cost is calculated based on the standard of construction cost estimation of Japan1). The maintenance cost model was developed using data derived from the manual and investigation. Installation and Operation / Maintenance Costing evaluation shows the ranking as G-2, G-1, VSS and PSS. For LCC, discount rate is set at 2.8%. All costs are converted into present-worth value using the declining balance method. The ranking by LCC is VSS, G-2, PSS and G-1. Initial energy consists of product energy and construction energy. Maintenance energy is calculated from exchanged parts, fuels and materials. Operating energy is estimated as electricity consumption. Energy unit values are derived from a paper2). LCE evaluation shows the ranking as PSS, VSS, G-2 and G-1. The Life Cycle C-CO2 emissions are calculated based on the data collected. The evaluation result is similar to that of LCE and the ranking is also the same as that of LCE. It is shown that rankings by costing methods and by environmental factors are different. So in selecting both a cheaper and environmentally friendly system, the combined evaluation method is recommended to find the most suitable collection system for us. Each maximum value is set at 1.0 and other lower values are calculated proportionally. It shows that VSS is the No.1 followed by PSS, G-2 and G-1 in this case study.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2000-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more