Macroalgae cultivation shows potential for the application as emerging feedstock for microbial fermentation to produce biochemicals. However, metal residues in macroalgae might affect the fermentation capacity of relevant microorganisms. This aspect is currently not considered when selecting macroalgae and microorganism species for microbial fermentation. To consider this aspect for selecting viable macroalgae and microorganism species, we link metal exposure in bioreactors from macroalgae residues to ecotoxicological test results for relevant microorganisms. Our results indicate that estimated bioreactor concentrations for most metals are below microorganism effect levels. For copper and hexavalent chromium, however, reactor concentrations might exceed relevant effect levels for at least some considered microorganism species. Adjusting water hardness in the bioreactor as well as selecting algae harvest location and macroalgae species might minimize metal exposure to fermenting microorganisms, in support of optimizing the biorefining process for biochemical production.

大型藻类培养显示出作为微生物发酵产生生化物质的新兴原料的应用潜力。但是，大型藻类中的金属残留物可能会影响相关微生物的发酵能力。这个方面的用于微生物发酵选择大藻类和微生物物种，当目前没有考虑。为了考虑这一方面来选择可行的大型藻类和微生物种类，我们将生物反应器中的金属暴露量从大型藻类残留物与相关微生物的生态毒理学测试结果联系起来。我们的结果表明，大多数金属的估计生物反应器浓度低于微生物影响水平。但是，对于铜和六价铬，对于至少某些考虑到的微生物物种，反应器浓度可能超过相关的影响水平。