Mendoza-Espinosa L, Orozco-Borbón M Victoria, Silva-Nava Patricia
División de Oceanografia Química, Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California (UABC), Km 107 Carretera Tijuana-senada, Ensenada, Baja California, México.
Water Sci Technol. 2004;50(2):285-91.
The city of Ensenada, Baja California, has three wastewater treatment plants and is one of the few cities in Mexico that treats all the wastewater that it generates. The largest wastewater treatment plant, called El Naranjo, treats on average 316 liters per second and complies with even the most stringent Mexican standards although a stricter control has to be achieved in order to avoid environmental and health problems At the moment, only 2% of the treated wastewater is used for the irrigation of sports fields and public landscape. The reclaimed water could be reused for the irrigation of crops for non-human consumption or ornamental products and/or for aquifer recharge. For reuse practices, two facts must be considered: a) an important part of the valley's production is exported to the USA and b) 30% of the city of Ensenada's water supply is obtained from the Maneadero aquifer. There is currently no Mexican legislation to stipulate adequate standards for aquifer recharge and decisions should be based on legislation from other places. Therefore, at the moment there is still a lack of technical and scientific elements to be able to make the best decision about the reuse of the wastewater.
下加利福尼亚州的恩塞纳达市有三座污水处理厂，是墨西哥少数几个处理其产生的所有废水的城市之一。最大的污水处理厂名为埃尔纳兰霍，平均每秒处理316升废水，并且符合墨西哥最严格的标准，不过为避免环境和健康问题，还必须实现更严格的管控。目前，仅2%的处理后废水用于灌溉运动场和公共景观。再生水可用于灌溉非供人食用的作物或观赏产品和/或用于回灌含水层。对于回用做法，必须考虑两个事实：a) 该山谷的很大一部分农产品出口到美国；b) 恩塞纳达市30%的供水来自马内阿德罗含水层。目前墨西哥没有立法规定含水层回灌的适当标准，决策应基于其他地方的立法。因此，目前仍缺乏技术和科学要素，无法就废水回用做出最佳决策。
