Abstract：
:Converting waste to resource may mitigate environmental pollution and global resource limitation. The platform chemical lactic acid can be produced from biowaste and its liquid fraction after solid-liquid separation. A fermentation step for lactic acid production prior to the conversion of biowaste to methane and organic fertilizer would increase the biowaste's value. Despite the huge potential and promising results of the treatment procedure, the reasons for efficiency loss observed previously need to be addressed in order to pave the way for an up-scaling of the fermentation process. Therefore, biowaste was fermented applying pH control, acid extraction and glucose addition in order to counteract reasons such as acidification, end-product inhibition and carbon limitation, respectively. The fermentation was competitive compared to other renewable lactic acid production substrates and reached a maximum productivity of >5 g Clactic acidg(-1)Ch(-1) and a concentration exceeding 30 g L(-1). A combination of acidification and end-product inhibition was identified as major obstacle. Lactobacillus crispatus and its closest relatives were identified as key lactic acid producers within the process using Miseq Illumina sequencing.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Probst M,Walter A,Dreschke G,Fornasier F,Pümpel T,Walde J,Insam Hdoi
10.1016/j.biortech.2015.09.055subject
Has Abstractpub_date
2015-12-01 00:00:00pages
540-9eissn
0960-8524issn
1873-2976pii
S0960-8524(15)01334-6journal_volume
198pub_type
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