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Solar Wastewater Treatment: Advantages and Efficiency for Reuse in Agriculture and Industry

机译：太阳能废水处理：农业和工业回用的优势和效率

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Algeria wastewater treatment sector uses weakly sustainable processes as natural lagooning and sand filters. The mainly processes use activated sewage sludge process and aerated lagoons. However these lasts induce high electricity consumption especially due to the daily continuous use of aeration propellers for the biologic treatment. The first part of study evaluated the yearly electricity consumption of an activated sewage sludge process to establish an exhaustive diagnostic of wastewater treatment, energy and environmental nexus. Obtained results showed that the used treatment consumed yearly 1.12 GWh of electricity and emitted 15.91 103 t CO2-eq of Greenhouse Gas emission (GHG). The biological treatment was the intensive-energy part of the process with 78% of electricity consumption. To decrease the negative impacts of the mentioned nexus, the second part of the study proposes Solar Wastewater Treatment (SOWAT) as a new sustainable and easy solar wastewater treatment. It uses one step treatment: the evaporation/condensation process performed in solar still. Comparatively to the conventional treatment, the sustainable process recorded similar efficiency treatment for municipal wastewater. Better yet, it allowed the wastewater disinfection that is not planned in the studied treatment plant. SOWAT is also applied successfully to treat real textile wastewater rejected from Algerian Textiles Company. Results recorded a significant removal of pollution. Treatment results both of real municipal and textile wastewater are conform to standards which allowed their reuse respectively in agriculture and industry.
机译：阿尔及利亚废水处理部门将可持续性较差的过程用作天然泻湖和滤砂器。主要过程使用活性污泥法和曝气池。然而，这些持续时间导致高电力消耗，特别是由于每天持续使用曝气螺旋桨进行生物处理。研究的第一部分评估了活性污泥工艺的年电力消耗，以建立对废水处理，能源和环境关系的详尽诊断。获得的结果表明，所使用的处理每年消耗1.12 GWh的电力，并排放15.91 103 t CO 2 当量的温室气体排放量（GHG）。生物处理是该过程中的高耗能部分，耗电量达78％。为了减少上述联系的负面影响，研究的第二部分提出将太阳能废水处理（SOWAT）作为一种新型的可持续且简便的太阳能废水处理方法。它采用一步处理：在太阳能蒸馏器中进行蒸发/冷凝过程。与常规处理相比，可持续过程记录了类似的市政废水效率处理。更好的是，它允许对所研究的处理厂中未计划的废水进行消毒。 SOWAT还成功地用于处理阿尔及利亚纺织公司拒绝的真实纺织废水。结果表明，污染物的清除效果显着。实际的市政废水和纺织废水的处理结果均符合允许分别在农业和工业中重复使用的标准。

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