针对西北村镇生活灰水的多介质庭院生态处理技术

Multi-media ecological courtyard treatment technology for domestic grey water in villages and towns of Northwest China

我国西北地区干旱缺水,作为非传统水源的生活灰水资源化利用率普遍偏低。针对我国西北村镇居民生活灰水的收集排放情况和水质特点,结合土壤和多介质滤料对水中污染物的去除效果,设计多介质庭院生态处理技术,将处理后居民生活灰水作为农田灌溉水进行利用。设计实验装置以内蒙古呼和浩特市某村居民生活灰水为进水,连续运行28 d,对处理效率进行研究。结果表明,装置对COD_(Cr)的去除率维持在65%左右,阴离子表面活性剂去除率维持在60%左右,SS去除率达到50%以上,并且灰水中的氮元素得到了保留,用于灌溉可为农作物增添肥效,论证了该技术在处理西北农村灰水方面的可行性。

As a non-traditional water source,the utilization rate of domestic gray water resources is generally low in northwest China due to drought and water shortage.According to the collection and discharge of domestic grey water and water quality characteristics in northwestern villages and towns in China,the multi-medium courtyard ecological treatment technology combing with the effect of soil and multi-media filter material on the removal of pollutants in water was designed.The treated domestic grey water was used as the farmland irrigation water.The experimental device was designed to take the domestic grey water of a village in Hohhot,Inner Mongolia as the inlet water.It operated continuously for 28 days to study the treatment efficiency.The results showed that the removal rate of COD_(Cr) was maintained at about 65%,and the removal rate of anionic surfactant was maintained at about 60%.The SS removal rate reached more than 50%,and the nitrogen element in the grey water was retained,which could increase the fertilizer efficiency of crops for irrigation.The experiment demonstrated the feasibility of the technology in the treatment of grey water in the villages and towns of Northwest China.