论文标题
对废水处理和资源回收的高率藻类池塘的生命周期评估
Life Cycle Assessment of high rate algal ponds for wastewater treatment and resource recovery
论文作者
论文摘要
这项研究的目的是评估与高速藻类池塘（HRAP）系统相关的潜在环境影响，用于废水处理和资源恢复。为此，进行了生命周期评估（LCA）和经济评估，评估了两个替代方法：i）用于废水处理的HRAPS系统，其中微藻生物量在能量回收（沼气生产）中得到了体重。 ii）用于废水处理的HRAPS系统，其中将微藻生物量重新用于养分（生物肥料生产）。此外，将这两个替代方案与典型的小型活性污泥系统进行了比较。结果表明，在气候变化，臭氧层耗竭，光化学氧化剂形成和化石耗尽影响类别中，HRAPS系统和沼气产量的结合似乎比HRAPS系统更环保。不同的气候条件严重影响了在富营养化和金属耗竭影响类别中获得的结果，而HRAPS系统则位于温暖的温度和高太阳辐射，主要显示影响较低的影响。在成本方面，与生物肥料生产而不是沼气相结合时，HRAPS系统在经济上似乎更可行。
The aim of this study was to assess the potential environmental impacts associated with high rate algal ponds (HRAP) systems for wastewater treatment and resource recovery in small communities. To this aim, a Life Cycle Assessment (LCA) and an economic assessment were carried out evaluating two alternatives: i) a HRAPs system for wastewater treatment where microalgal biomass is valorised for energy recovery (biogas production); ii) a HRAPs system for wastewater treatment where microalgal biomass is reused for nutrients recovery (biofertiliser production). Additionally, both alternatives were compared to a typical small-sized activated sludge system. The results showed that HRAPs system coupled with biogas production appeared to be more environmentally friendly than HRAPs system coupled with biofertiliser production in the climate change, ozone layer depletion, photochemical oxidant formation, and fossil depletion impact categories. Different climatic conditions have strongly influenced the results obtained in the eutrophication and metal depletion impact categories, with the HRAPs system located where warm temperatures and high solar radiation are predominant showing lower impact. In terms of costs, HRAPs systems seemed to be more economically feasible when combined with biofertiliser production instead of biogas.
