Author/Authors :
J ،Shayegan Chemical and Petroleum engineering Department - Sharif University of Technology , L ،Kamalzadeh Chemical and Petroleum engineering Department - Sharif University of Technology , T ،Bahadory Chemical and Petroleum engineering Department - Sharif University of Technology
كليدواژه :
municipal wastewater treatment , process selection , multi-criteria optimization , wastewater reuse , optimal operation
چكيده لاتين :
Proper process selection has a very important role in optimal design and operation of municipal wastewater treatment plants
specially at executing time (construction and maintenance). Many of Iranian wastewater treatment plants are designed without
considering important issues such as: option of Satellite or Centralized plant, option of sludge and effluent reuse, energy
consumption efficiency, national technology level, equipment availability and minimal operational and maintenance
complexity. The aim of this work is to provide an integrated and comprehensive procedure for the conceptual design and
optimal process selection of municipal wastewater treatment plants in Iran which has a great potential for developing new
wastewater treatment plants for many towns. For this reason this work has been defined to establish a unique multi-criteria
optimization for process selection, aiming to help the decision makers and design engineers to find optimal process design with
economical consideration. The main parameters included in this study are existing water and wastewater system in the studytown,
level of public health and cleansing, people tradition and culture, local situation and condition, land availability and price
and wastewater quality and quantity. Critical consideration of the above mentioned parameters leads to two major decisions:
Separate versus Combined sewer collection systems and Central versus Satellite systems. Having done this step, and taking into
account the result of necessary evaluations such as environmental impact, technical feasibility, economical feasibility and
legislation and legal issues, a few design alternative options will appear. For all these alternatives, issues such as suitable
treatment processes, regional water scarcity and the need for effluent reuse, sludge conditioning and reuse and economic
conditions are reconsidered. The most suitable alternative will be chosen from the selected alternatives. This alternative again
re-evaluated for environmental impact. If the result of analysis is positive, then selected alternative will be introduced as the
best. This model is illustrated in the full text.
