University of Rome La Sapienza, Department of Chemical Engineering, Via Eudossiana 18, 00184 Rome, Italy.
Water Res. 2013 Sep 1;47(13):4710-8. doi: 10.1016/j.watres.2013.05.030. Epub 2013 May 29.
Olive milling produces huge amounts of wastewater (OMWW) characterized by an extremely high organic load. Its polyphenols content is a hindrance to conventional biological treatment and to using it as growing medium for common microbial biomasses. The practice to dump it on soil is in conflict with the latest EU directives about waste management. OMWW can be effectively and efficiently treated by means of membrane technology to a fraction of the initial volume, but membrane processing concentrates still require treatment. Reversing the overall cost balance of membrane processing and subsequent treatment requires valorizing the concentrates through their reuse, as well as ensuring long-term service of the membrane system through effective wastewater pretreatment and sustainable, fouling-controlling, membrane operation conduite. Aim of this work is to reuse and valorize the ultra- and nanofiltration membrane concentrates as media for biomass production of microalgae and cyanobacteria. Scenedesmus dimorphus and Arthrospira platensis, usable as a food, feed, nutraceutical component or feedstock for biofuels, were selected for this investigation. Microalgal growth was experimentally determined and related to the composition of the concentrate-based media and to the irradiance distribution within the photobioreactor volume to decouple light limitation and medium chemical composition effects.
橄榄油生产会产生大量废水（OMWW），其具有极高的有机负荷。其多酚含量对传统的生物处理以及将其用作普通微生物生物质生长介质造成了阻碍。将其倾倒在土壤上的做法与欧盟关于废物管理的最新指令相冲突。通过膜技术可以有效地将 OMWW 处理到初始体积的一小部分，但膜处理浓缩物仍需要处理。要扭转膜处理和后续处理的总体成本平衡，需要通过再利用浓缩物来实现其价值，同时通过有效的废水预处理和可持续的、防污的、膜操作来确保膜系统的长期运行。这项工作的目的是将超滤和纳滤膜浓缩物再利用和赋予其价值，用作微藻和蓝藻生物质生产的介质。选择了可作为食品、饲料、营养成分或生物燃料原料的二形栅藻和钝顶螺旋藻进行这项研究。通过实验确定了微藻的生长，并将其与浓缩物基介质的组成以及光生物反应器体积内的辐照度分布相关联，以解耦光限制和介质化学成分的影响。
