Final Technical Report, DE-SC0000581 Page: 4 of 7
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the - acre ponds in the foreground and buildings which house the proprietary extraction
equipment in the back.
A.s - _;" om . .. ~ -".4 . - -f' ... .-
' i i - ::"- " a ~'': - ' ~- ='i" .s -
Figure 1. CEHMM outdoor raceway pond and buildings which house extraction equipment
The CEHMM approach was the use of open raceway ponds to cultivate the algae as opposed to
photo-bioreactors. Data collected on a daily basis substantiate the claim that the CEHMM
marine alga can be grown on a continuous basis in an outdoor setting.
A variety of harvesting techniques were investigated during the grant period. The time at which
algae harvest is initiated depends on a variety of factors. The health of the culture as measured
by certain biological and chemical factors is important. Our experience has found that during
periods of high growth, the algae ponds do best if the level of harvest is increased.
Routine samples are taken and evaluated microscopically to assess levels of predation and
presence of invaders. Techniques have been developed to address these issues. The fact that the
alga being cultured is marine and there are no naturally occurring marine waters nearby is a
buffer against most predation or invasion.
The vitality of the culture is typically measured by turbidity and photo-optics. The higher the
turbidity, the more robust the culture and the greater the need to harvest.
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Lynn, Douglas C. Final Technical Report, DE-SC0000581, report, December 28, 2010; United States. (digital.library.unt.edu/ark:/67531/metadc845000/m1/4/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.