Mennaa Fatima Zahra, Arbib Zouhayr, Perales José Antonio
a Department of Environmental Technology , Instituto de Desarrollo Tecnológico & Industrial de la Bahía de Algeciras, Escuela Politécnica Superior de Algeciras, University of Cadiz , Cádiz , Spain.
b Aqualia Gestión Integral del Agua SA , Madrid , Spain.
Environ Technol. 2019 Jan;40(3):342-355. doi: 10.1080/09593330.2017.1393011. Epub 2017 Nov 3.
The aim of this study was to investigate the growth, nutrient removal and harvesting of a natural microalgae bloom cultivated in urban wastewater in a bubble column photobioreactor. Batch and continuous mode experiments were carried out with and without pH control by means of CO dosage. Four coagulants (aluminium sulphate, ferric sulphate, ferric chloride and polyaluminium chloride (PAC)) and five flocculants (Chemifloc CM/25, FO 4498SH, cationic polymers Zetag (Z8165, Z7550 and Z8160)) were tested to determine the optimal dosage to reach 90% of biomass recovery. The maximum volumetric productivity obtained was 0.11 g SS Ld during the continuous mode. Results indicated that the removal of total dissolved nitrogen and total dissolved phosphorous under continuous operation were greater than 99%. PAC, Fe(SO) and Al(SO) were the best options from an economical point of view for microalgae harvesting.
本研究的目的是调查在鼓泡柱光生物反应器中利用城市污水培养的天然微藻水华的生长、养分去除及采收情况。通过投加CO进行pH控制或不控制pH的情况下，开展了批次和连续模式实验。测试了四种混凝剂（硫酸铝、硫酸铁、氯化铁和聚合氯化铝（PAC））和五种絮凝剂（Chemifloc CM/25、FO 4498SH、阳离子聚合物Zetag（Z8165、Z7550和Z8160）），以确定达到90%生物量回收率的最佳投加量。连续模式下获得的最大体积生产力为0.11 g SS L⁻¹ d⁻¹。结果表明，连续运行时总溶解氮和总溶解磷的去除率大于99%。从经济角度来看，PAC、Fe₂(SO₄)₃和Al₂(SO₄)₃是微藻采收的最佳选择。
