污水直接膜过滤用于农灌可行性试验

本试验尝试用膜直接截留污水中对人体健康有害的细菌病毒,而保留水中对作物有益的氮、磷等营养元素,以期实现水、肥双成分资源化。试验结果表明,无论是微滤膜还是超滤膜均对细菌及粪大肠菌有很高的截留率(99.9%～99.999%),污水中有机物、氮与磷的保留率分别为32%～67%、72%～78%和60%～62%。用渗滤液灌溉的小麦较之清水灌溉和常规灌溉的小麦,麦穗单重分别提高13%和7.5%。

EXPERIMENT ON FEASIBILITY OF DIRECT FILTRATION OF WASTEWATER BY MEMBRANE

The experiment was intended with membrane separation to trap pathogens and viruses and keep nutrient elements in domestic wastewater for the purposes of both water and nutrient reuses.The experimental results indicated that both micro-filtration and ultra-filtration were good enough to trap bacteria and/or fecal coliform (removal efficiency:99.9%～99.999%) and that organic matter of 32%～67%, nitrogen of 72%～78% and phosphorus of 60%～62% in raw wastewater could be kept.When irrigating wheat, the permeate could increase the wheat production by 13% and 7.5% compared with tap water and tap water plus chemical fertilizer.