UFS-7 Experiment (Jun-Jul 2015)
The seventh Unified Field Study (UFS-7) was peformed from June to July 2015.
The UFS-7 Experiment was a direct comparison of two dilution rates (0.11 and 0.214 per day) with the algal species Desmodesmus intermedius C046. This experiment provided baseline dilution rate/strain performance evaluation for this new strain (C046).
A total of 6 x 1,000 L (nominal volume at 25 cm depth) identical raceway pond simulators, paddle wheels, and data logging (e.g., YSI 5200 monitoring and control system with probes for pH, temperature, oxidative reduction potential (ORP), dissolved oxygen, conductivity/salinity probes, and a PAR sensor connected to one YSI unit) have been installed at each site. The six ponds allow experiments to be conducted in duplicate for up to three experimental variables in a simultaneous, randomized design. To date, we have run treatments in triplicate; however our data indicates that ponds of the same treatment have low enough variation that duplicates are sufficient for each treatment, which allows us to test more treatments at one time. In addition to the outdoor cultivation system harmonization, we have installed at each site an identical system for cultivation of indoor seed culture. This coupled with consistent cultivation management will allow for uniform production of starting culture across the sites in terms of volume of seed available and quality.
The experiment was initiated on Jun 17, 2015. For all data generated in this experiment, the ExperimentID is JUN172015.
Here is the experimental protocol used to conduct these runs. NOTE - UFS-7 was originally referred to as "UFS Summer 2015 ". There are several references to this earlier name in the protocol.
Pond Operational Data
Click here for the complete operational data for each pond at each site for each algal species. These data include the measured pond depth (cm), pH, salinity, pond water temperature (C), nitrogen concentration (ppm as N), phosphorus concentration (ppm as P), N:P ratio (molar), the sample ID and tracking ID of a physical sample (if taken), the algae concentration (g/L) as dry weight and ash-free dry weight (AFDW), the ash content of the algal biomass (%), and the optical density at 750nm (OD750). Not all data are available for all sites and ponds.
Click here for the complete and daily-averaged instrumentation data for each pond at each site for each algal strain. These data include the pH, oxidation-reduction potention (ORP, mv), pond water temperature (C), pond conductivity (ms.cm), dissolved oxygen concentration (DO, mg/L), dissolved oxygen saturation (%), salinity (g/L), and photosynthetically active radiation (PAR, umol/m2/s). The PAR sensor was connected to only one of the ponds. Not all data are available for all sites and ponds.
Click here for the complete and daily-averaged weather data for each site for each algal strain. These data include air temperature (C), relative humidity (%RH), Global Light Intensity (W/m2/s), daily precipitation (cm), wind speed (km/hr), and wind direction (degrees). Not all data are available for all sites.
Summary Harvest Data
Click here for the complete harvest data for each pond at each site. These data include date, strain, batch and source ID, pond treatment and depth (cm). The harvest data includes harvest number and time between harvests, harvest volume (L), amount (g), ash-free dry weight (AFDW; g/L) at the time of harvest, and an indication of a pond crash.