APPLICATION OF VARIOUS MBR SYSTEMS FOR WATER RECLAMATION

摘要

Four leading commercially available MBR systems are being operated at the pilot scale level over a 14- month period at the Point Loma Wastewater Treatment Plant (PLWTP) located in San Diego, CA. The four MBR systems being tested include Kubota, US Filter / Jet Tech, Zenon and Mitsubishi Rayon. The primary objective of the pilot testing is to obtain operational and water quality data on the Kubota and US Filter MBR systems which are relatively new to the US market. Furthermore, the project is being conducted to assess the performance of MBR systems while operating on advanced primary effluent which contains coagulant and polymer. Phase I of the pilot testing began in April 2002 and was completed in January 2003. During this period the Kubota and US Filter MBR systems were operated on both raw wastewater and advanced primary effluent from the PLWTP. Phase II pilot testing began in April 2003 and is scheduled to be complete in July 2003. During this testing period the Zenon and Mitsubishi MBR pilot systems are being operated on advanced primary effluent. To date results indicate that the MBR systems from the two new suppliers (Kubota and US filter) have shown high removal of particulate matter, bacteria and organics. This finding is significant to the water quality community as it increases the number of MBR suppliers proven to be suitable for reclaimed water production. Lastly, preliminary results of Phase II testing indicate that the MBR systems can operate successfully on advanced primary treated effluent which contains residual coagulant and polymer. This finding is significant as operation of MBRs on advanced primary effluent may prove to be more cost effective than operation on raw wastewater due to the lower solid and organic content.