Abstract

In this research, the removal performances and efficiency of nutrients (Nitrogen and Phosphorus) and organic pollutants were investigated through the application of sustainable and cost-effective strategy in wastewater treatment using algal-bacterial symbiotic association. A photobioreactor of 200 L was designed, constructed and operated in the field as part of the wastewater treatment plant of Palestine Technical University. The photobioreactor was fed with real pre-treated domestic wastewater. Treatment efficiency, interactions between physico-chemical factors, biomass production and the performance of the system as tertiary treatment for removing nutrients and organic matter was evaluated in order to improve the treated wastewater quality. The obtained results demonstrated the efficiency of the system in removing the targeted pollutants as a result of the synergistic relationship between algal and bacterial cultures within the reactor. The system was able to adapt with the surrounding field environment, and have an algal-bacterial cultures capable of removing the targeted pollutants. A stabilized biomass concentration of 0.70 (absorbance at 320 nm) and dissolved oxygen (9.5 mg/L) were found to be in the reactor during daylight. Initial ammonium concentrations were found to be around 57 ± 2 mg-N/L and decreased to 25 mg-N/L, indicating a removal efficiency of about 55%, meanwhile 70% of the COD and 91% of the phosphorus were removed during the experiment. These results are considered promising under real field conditions. However more deep investigation still needed to understand the impact and interaction of different factors on the entire process behavior.

中文翻译：

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使用藻-细菌光生物反应器对城市废水中的营养物质进行生物修复：提高出水质量的实际现场规模示范

摘要

在这项研究中，通过在使用藻-细菌共生关联的废水处理中应用可持续和具有成本效益的策略，研究了营养物质（氮和磷）和有机污染物的去除性能和效率。作为巴勒斯坦技术大学废水处理厂的一部分，在现场设计、建造和运行了一个 200 L 的光生物反应器。光生物反应器由真正的预处理过的生活废水供给。评估处理效率、物理化学因素之间的相互作用、生物质生产以及作为去除营养物和有机物的三级处理系统的性能，以提高处理后的废水质量。获得的结果表明，由于反应器内藻类和细菌培养物之间的协同关系，该系统在去除目标污染物方面的效率。该系统能够适应周围的野外环境，并且具有能够去除目标污染物的藻类细菌培养物。在白天，反应器中发现稳定的生物量浓度为 0.70（320 nm 处的吸光度）和溶解氧（9.5 mg/L）。发现初始铵浓度约为 57 ± 2 mg-N/L 并降低至 25 mg-N/L，表明去除效率约为 55%，同时去除了 70% 的 COD 和 91% 的磷。本实验。这些结果在实际现场条件下被认为是有希望的。