Enhanced polyhydroxyalkanoate (PHA) production from the organic fraction of municipal solid waste by using mixed microbial culture

被引：107

作者：

Colombo, Bianca ^{[1
]}

Favini, Francesca ^{[1
]}

Scaglia, Barbara ^{[1
]}

Sciarria, Tommy Pepe ^{[1
]}

D'Imporzano, Giuliana ^{[1
]}

Pognani, Michele ^{[1
]}

Alekseeva, Anna ^{[2
]}

Eisele, Giorgio ^{[2
]}

Cosentino, Cesare ^{[3
]}

Adani, Fabrizio ^{[1
]}

机构：

[1] Univ Milan, DiSAA, Grp Ricicla Labs, Via Celoria 2, I-20133 Milan, Italy

[2] Ist Ric Chim & Biochim G Ronzoni Srl, Ctr Alta Tecnol, Via Colombo 81, I-20133 Milan, Italy

[3] Ist Ric Chim & Biochim G Ronzoni, Via Colombo 81, I-20133 Milan, Italy

来源：

BIOTECHNOLOGY FOR BIOFUELS | 2017年 / 10卷

关键词：

Aerobic dynamic feeding strategy; Anaerobic percolation biocell reactor; Mixed microbial culture; Municipal solid waste; Polyhydroxyalkanoate; Sequencing batch reactor; VOLATILE FATTY-ACIDS; OIL MILL EFFLUENT; FOOD WASTES; POLYHYDROXYBUTYRATE PRODUCTION; CUPRIAVIDUS-NECATOR; CHEESE WHEY; FEEDSTOCK; STRATEGY; BIOMASS; SLUDGE;

D O I：

10.1186/s13068-017-0888-8

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Background: In Europe, almost 87.6 million tonnes of food waste are produced. Despite the high biological value of food waste, traditional management solutions do not consider it as a precious resource. Many studies have reported the use of food waste for the production of high added value molecules. Polyhydroxyalkanoates (PHAs) represent a class of interesting bio-polyesters accumulated by different bacterial cells, and has been proposed for production from the organic fraction of municipal solid waste (OFMSW). Nevertheless, until now, no attention has been paid to the entire biological process leading to the transformation of food waste to organic acids (OA) and then to PHA, getting high PHA yield per food waste unit. In particular, the acid-generating process needs to be optimized, maximizing OA production from OFMSW. To do so, a pilot-scale Anaerobic Percolation Biocell Reactor (100 L in volume) was used to produce an OA-rich percolate from OFMSW which was used subsequently to produce PHA. Results: The optimized acidogenic process resulted in an OA production of 151 g kg(-1) from fresh OFMSW. The subsequent optimization of PHA production from OA gave a PHA production, on average, of 223 +/- 28 g kg(-1) total OA fed. Total mass balance indicated, for the best case studied, a PHA production per OFMSW weight unit of 33.22 +/- 4.2 g kg(-1) from fresh OFMSW, corresponding to 114.4 +/- 14.5 g kg(-1) of total solids from OFMSW. PHA composition revealed a hydroxybutyrate/hydroxyvalerate (%) ratio of 53/47 and Mw of 8.10(5) kDa with a low polydispersity index, i.e. 1.4. Conclusions: This work showed how by optimizing acidic fermentation it could be possible to get a large amount of OA from OFMSW to be then transformed into PHA. This step is important as it greatly affects the total final PHA yield. Data obtained in this work can be useful as the starting point for considering the economic feasibility of PHA production from OFMSW by using mixed culture.

引用

页数：15

共 38 条

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