Abstract

In this paper, Synechococcus PCC 7002 was cultivated in urban wastewater and its depurative capacity was evaluated to remove chemical oxygen demand (COD), nitrogen (N) and phosphorus (P) content producing a carbohydrate-rich biomass. Preliminary studies demonstrated 28 °C and no injection of concentrated CO₂ as suitable conditions to perform the biological treatment and to obtain a depurated water with characteristics below the law limit for COD, N and P. Using concentrated synthetic wastewater to verify the extended capacity to treat several range of wastewaters, Synechococcus proportionally decreased the capacity of pollutants removal showing that probable an environmental/nutritional factor was not completely simulated by the synthetic wastewater what harm Synechococcus performance and was determined as lacking micronutrients. Real wastewater experiments validated the potentiality of this strain to wastewater bioremediation also reaching values of COD, N and P, below the law limit (> 80% of removal rate) and a biomass with up to 60% of carbohydrate content was produced.

摘要

在本文中，聚球藻PCC 7002 在城市废水中培养，并评估其净化能力以去除化学需氧量 (COD)、氮 (N) 和磷 (P) 含量，从而产生富含碳水化合物的生物质。初步研究表明，28 °C 和不注入浓 CO ₂是进行生物处理并获得 COD、N 和 P 的特性低于法律限值的净化水的合适条件。使用浓合成废水验证扩展能力处理多种废水，聚球藻成比例地降低污染物去除能力，表明合成废水没有完全模拟可能的环境/营养因素，这会损害聚球藻的性能，并被确定为缺乏微量营养素。实际废水实验验证了该菌株对废水生物修复的潜力，其 COD、N 和 P 值也达到了低于法律限制（> 80% 的去除率）的值，并且产生了高达 60% 的碳水化合物含量的生物质。