Laboratory Ecology and Environment (L2E), URAC 32, Faculty of Sciences Semlalia, Cadi Ayyad University, BP 2390-4008 Marrakesh, Morocco.
Laboratory Ecology and Environment (L2E), URAC 32, Faculty of Sciences Semlalia, Cadi Ayyad University, BP 2390-4008 Marrakesh, Morocco; ISPITS-Higher Institute of Nursing and Health Techniques, Ministry of Health, Marrakesh, Morocco.
J Infect Public Health. 2018 Mar-Apr;11(2):197-202. doi: 10.1016/j.jiph.2017.07.026. Epub 2017 Aug 7.
Morocco is a country known for its vulnerability of water resources because of its arid and semi-arid climate. Thus, recycled wastewater has been suggested for agricultural activities, but contamination of these wastewaters is a major concern. The current study aims to determine the occurrence of helminth eggs in urban wastewater and to evaluate the removal of these pathogens by two sewage treatment systems: activated sludge and natural lagoons. The samples of wastewater and sludge were collected from two wastewater treatment plants (WWTP) located in Marrakech and Chichaoua, Morocco. Parasitological identification, according to the Bailenger technique, showed the presence of Nematodes and Cestodes, which are pathogenic to humans and animals and are responsible for helminthiasis. The wastewater and sewage sludge samples from Marrakech carried Ascaris lumbricoïdes, Ancylostoma duodenale, Trichuris trichiura, Capillaria spp., Taenia spp. and Hymenolepis spp., while the samples from Chichaoua carried Ascaris lumbricoïdes, Ancylostoma duodenale, Trichuris trichiura and Capillaria spp. The overall removal efficiency of eggs in the treatment plants ranged from 100% in the WWTP of Marrakech using activate sludge to 94.97% in the WWTP of Chichaoua using natural lagoons. These results were discussed according to health risk and the cost-effectiveness of both wastewater treatment techniques.
摩洛哥是一个水资源脆弱的国家，由于其干旱和半干旱的气候。因此，已建议将再生废水用于农业活动，但这些废水的污染是一个主要关注点。本研究旨在确定城市废水中寄生虫卵的发生情况，并评估两种污水处理系统（活性污泥和自然池塘）对这些病原体的去除效果。废水和污泥样品取自摩洛哥马拉喀什和希沙瓦的两个污水处理厂（WWTP）。根据 Bailenger 技术进行的寄生虫学鉴定表明，存在对人类和动物致病的线虫和绦虫，这些寄生虫会引起寄生虫病。马拉喀什的废水和污水污泥样本中携带了蛔虫、十二指肠钩虫、鞭虫、毛细线虫、带绦虫和膜壳绦虫，而希沙瓦的样本中携带了蛔虫、十二指肠钩虫、鞭虫和毛细线虫。处理厂中卵的总体去除效率从马拉喀什使用活性污泥的 WWTP 的 100%到希沙瓦使用自然池塘的 WWTP 的 94.97%不等。根据健康风险和两种废水处理技术的成本效益对这些结果进行了讨论。
