Presentation Title

**Decentralized Renewable Off-Grid Wastewater Treatment (DROWT)** Exemplary Presentation

Faculty Mentor

Reza Baghaei Lakeh, Ali Sharbat

Start Date

18-11-2017 2:15 PM

End Date

18-11-2017 2:30 PM

Location

9-243

Session

Engineering/CS 1

Type of Presentation

Oral Talk

Subject Area

engineering_computer_science

Abstract

In California, the drought has become an important issue due to declines in surface water sources. Dependence on groundwater and importing water from the Colorado River continues to increase in order to keep up with high water demands. Therefore, use of recycled water is necessary and water reuse implementation is becoming more widely accepted in the community. Greywater is used water from bathroom sinks, showers, tubs, and washing machines, not including wastewater from toilets or kitchen sinks. The research team at Cal Poly Pomona, with the support of Metropolitan Water District of Southern California, are developing an off-grid solar-powered greywater treatment system for non-potable use in single households. Treating greywater on-site can provide huge water savings and reduce people’s carbon footprint. The system is comprised of a three-stage treatment which includes a microfiltration, solar-driven reverse osmosis, and a UV disinfection unit. The product of this project is capable of reclaiming 90 gallons of water per day while recovering 63% of residential greywater. The design of the system will remove traces of organic chemicals, inorganic chemicals, and particulates of dirt, food, etc. In addition, the team has completed and built a preliminary design of the greywater treatment system to address the mechanical, controls, and electrical aspects of the overall system for future use. Data was collected and analyzed to assist in the design process of Version 2 of the system.

Summary of research results to be presented

A series of endurance tests were conducted on Version 1 to record the performance of a solar powered reverse osmosis water treatment system in which sets of 2 hour and 4 hour tests were performed to collect data on the efficiency of the system. The system was able to reach about 65% recovery at 100 psi with a energy consumption of 5.5 kWh/gal. Energy consumption of the system was most stable while operating at about 100 psi, and is likely to continue this trend up to the given operating pressure of the reverse osmosis membranes at 140 psi. However, having been limited by the parts on this version of the system, the endurance tests were limited to operation at 100 psi. Version 2 of the system has since been designed and is being built while taking into account the issues we encountered in Version 1.

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Nov 18th, 2:15 PM Nov 18th, 2:30 PM

**Decentralized Renewable Off-Grid Wastewater Treatment (DROWT)** Exemplary Presentation

9-243

In California, the drought has become an important issue due to declines in surface water sources. Dependence on groundwater and importing water from the Colorado River continues to increase in order to keep up with high water demands. Therefore, use of recycled water is necessary and water reuse implementation is becoming more widely accepted in the community. Greywater is used water from bathroom sinks, showers, tubs, and washing machines, not including wastewater from toilets or kitchen sinks. The research team at Cal Poly Pomona, with the support of Metropolitan Water District of Southern California, are developing an off-grid solar-powered greywater treatment system for non-potable use in single households. Treating greywater on-site can provide huge water savings and reduce people’s carbon footprint. The system is comprised of a three-stage treatment which includes a microfiltration, solar-driven reverse osmosis, and a UV disinfection unit. The product of this project is capable of reclaiming 90 gallons of water per day while recovering 63% of residential greywater. The design of the system will remove traces of organic chemicals, inorganic chemicals, and particulates of dirt, food, etc. In addition, the team has completed and built a preliminary design of the greywater treatment system to address the mechanical, controls, and electrical aspects of the overall system for future use. Data was collected and analyzed to assist in the design process of Version 2 of the system.