08/16/2016 (4) - Laserfiche WebLink

Home Browse Search

Adjacent to the multi -staged LEAPSTM system, we will construct a non -sloped, PEARO system with an identical flow rate (Figure Al). The value of operating an attached al- gae system in parallel with the LEAP STM system is that the County has historical expe- rience and data from operating large-scale attached algae systems. Therefore, the da- ta from the NRC PEARO system will allow comparisons of algae production and algae - based nutrient removal efficacy across sites in the county (eg., Osprey and Egret Marsh ATS® systems). Further, it will allow site -controlled, internal comparisons of wa- ter treatment efficacy between a multi -plant, multi -stage LEAPSTm and an attached al- gae platform. Although the PEARO system is an algae -based system, it has several advantages rel- ative to ATS® systems since the weir -based, non -sloped configuration is intrinsically robust and will maintain a healthy algae crop in the event that pumping is interrupted. This results in a system that is amenable to lower energy, non -continuous pumping strategies (eg, daytime pumping only), while still maintaining equivalent rates of algae growth relative to traditional sloped attached algae systems (experimentally deter- mined by VEN in side-by-side study). In addition to the materials for the construction of the pilot system itself, during Stage 1 we will have a fence and camera installed to ensure security of the site. Informative signage will be placed for safety considerations and to notify the public of the objec- tives and goals of the project (Appendix A2). Key deliverables for this stage (see Table 1) include: 1) a written confirmation that the selected pilot site is acceptable, 2) a report on the water quality and settleable solids characteristics and 3) a written report detailing the pilot site construction (pilot system, office, fence, etc) and confirmation that the pilot is operational and secured. 5 268