ewce09.azraftaohid.me/L3T2/GERM 352/Low Cost Grey Water For Urban Reuse/Research Methodology.md

Created: 2026/04/05 19:44 share_link: https://notesx.azraftaohid.me/a7zmfa8j share_updated: 2026-04-06T17:42:14+06:00

Phase 1: Prototype Development

Component integration:

Pre-tank filtration: A grease trap followed by a coarse mesh screen will be installed at the inlet to intercept oil, hair, lint, and large debris to prevent clogging of downstream components.
MABR unit: A simplified Membrane Aerated Biofilm Reactor (MABR) will be integrated to provide biological treatment.
Secondary filtration & disnfection: The water will pass through a secondary filtration membrane for fine particles, followed by a chlorine tablet dispenser for disinfection.

Storage and distribution: A small storage tank will hold the treated water, and a low-wattage booster pump will be installed to deliver the water back to toilets or floor-cleaning taps.

Phase 2: Laboratory Performance Evaluation

Sampling: Samples of "influent" (untreated greywater) and "effluent" (treated water) will be collected. Water quality testing: The samples will be tested in a laboratory for key parameters to see if they meet non-potable reuse standards. These include turbidity, BOD, total coliforms, pH, and chlorine residuals.

Phase 3: Durability and Economic Analysis

Stress testing: The system will be run continuously for a set period (e.g., 30 days) to identify potential failure points, such as membrane clogging or pump overheating. Cost-benefit analysis: We will calculate the total "Capital Cost" (building the unit) and "Operating Cost" (electricity and chlorine). This will be compared against current Dhaka WASA water tariffs to determine the Payback Period, i.e., how long it takes for a household to save enough money on water bills to cover the cost of the system.

Phase 4: Final Reporting

Manual development: A beginner-friendly operational manual will be produced for household users. It will include step-by-step instructions for installation, a simple maintenance schedule (e.g., when to clean the grease trap or replace chlorine tablets), and basic troubleshooting. Research compilation: All data from the laboratory tests and economic analysis will be synthesized into a final research paper.