丝状藻类混合培养进行农业径流的植物修复以生产生物甲烷，以及回收养分以用于产生脂质的微藻的二次培养。
Phytoremediation of agriculture runoff by filamentous algae poly-culture for biomethane production, and nutrient recovery for secondary cultivation of lipid generating microalgae.
机构信息
Department of Geography & Environmental Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USA; Department of Chemical & Biomolecular Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USA.
Department of Geography & Environmental Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686, USA.
出版信息
Bioresour Technol. 2016 Dec;222:294-308. doi: 10.1016/j.biortech.2016.10.013. Epub 2016 Oct 5.
An integrated system was implemented for water phytoremediation and biofuel production through sequential cultivation of filamentous algae followed by cultivation of lipid-producing microalgae Chlorella sorokiniana. Natural poly-culture of filamentous algae was grown in agricultural stormwater using the Algal Turf Scrubber®, harvested and subjected for lipid extraction and/or methane production using anaerobic digestion (AD). While filamentous algae lipid content was too low for feasible biodiesel production (<2%), both whole biomass and lipid-extracted algal residues (LEA) yielded ∼0.2LmethanepergVS at loading rates up to 5gVS/L-day. Importantly, essential macro-nutrients and trace elements captured from stormwater were released into the AD effluent as soluble nutrients and were successfully tested as fertilizer replacement for cultivation of lipid-accumulating C. sorokiniana in a subsequent stage. Accordingly, filamentous algae poly-culture was exploited for waste nutrient capturing and biofuel feedstock generation. These nutrients were recovered and reused as a concentrated supplement for potentially high-value microalgae.
通过丝状藻类的顺序培养，然后培养产脂微藻小球藻，实现了水的植物修复和生物燃料生产的集成系统。利用藻类草皮擦洗器在农业暴雨水体中进行天然丝状藻类的多培养，收获后进行脂质提取和/或甲烷生产，使用厌氧消化（AD）。虽然丝状藻类的脂质含量太低，无法进行可行的生物柴油生产（<2%），但整个生物质和提取脂质的藻类残渣（LEA）在高达 5gVS/L-day 的加载速率下，每克挥发性固体可产生约 0.2L 甲烷。重要的是，从暴雨水体中捕获的必需宏量营养素和痕量元素作为可溶性养分释放到 AD 流出物中，并在随后的阶段成功测试作为培养脂质积累小球藻的肥料替代品。因此，丝状藻类的多培养被用于捕获废营养物和生产生物燃料原料。这些养分被回收并再用作潜在高价值微藻的浓缩补充剂。
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