Date of Award
8-2025
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Environmental Engineering and Earth Science
Committee Chair/Advisor
Dr. Michael Carbajales-Dale
Committee Member
Dr. David Ladner
Committee Member
Dr. Sudeep Popat
Abstract
This thesis studies the integration of an algae-based membrane bioreactor (MBR) and photobioreactor system into a domestic wastewater treatment facility, using the Clemson University WWTP as a reference plant. The proposed system replaces the conventional sequencing batch reactor and aerobic digester with a microalgae-bacteria symbiosis process, coupled with submerged ceramic membranes, an algal photobioreactor and anaerobic digestion for enhanced nutrient and energy recovery, which paves the way for water reuse and increased biological capacity in the future.
The study shows that overall energy consumption is reduced by approximately 18% compared to the existing conventional configuration. Further, methane production from anaerobic digestion of algae-enriched sludge enables on-site biogas recovery, offsetting nearly 19% of the plant’s total electricity demand through combined heat and power (CHP) generation. These improvements significantly enhance the energy profile of the facility.
The Life Cycle Assessment (LCA) of the current SBR system and the algae-based system shows a significant impact reduction in energy consumption, greenhouse gas emission, acidification, ecotoxicity, etc., for the algae-based system. The strategy presents a viable and sustainable upgrade path for future wastewater treatment infrastructure.
Recommended Citation
Lakshmi Srinivasan, Harish, "Life Cycle Assessment of Sustainable Wastewater Systems - Algae-Based Wastewater Treatment" (2025). All Theses. 4606.
https://open.clemson.edu/all_theses/4606