新亚铵法制浆中段水灌溉对地下水及水稻生长的影响

通过PVC管模拟试验,研究了新亚铵法制浆中段水灌溉对地下水及水稻生长的影响。结果表明,新亚铵法制浆中段水灌溉能显著促进水稻生长,增加水稻生物量,且废水量越大效果越明显;但随着时间的推移,CODC r去除率逐渐下降,下渗水中CODC r的含量逐渐增加,且全盐含量也呈现逐渐上升的趋势;下渗水中总氮含量随时间的变化不明显,去除率随灌溉水量的增大而下降。为了达到在不影响地下水的同时最大化处理污水的目的,建议废水经过土地—植物系统处理后,收集下渗水再用于大面积农田灌溉。

Effect of Irrigation with Mid-stage Effluent of Pulping by New Ammonium Sulfite Method on Groundwater and Rice Growth

Effects of irrigation with mid-stage effluent of pulping by new ammonium sulfite method on groundwater and rice growth were investigated in a simulation experiment by PVC tube.The results showed that irrigation with mid-stage effluent promoted rice growth and increased its biomass markedly.But the rate of removing CODCr declined and the CODCr content and salinity increased with the process of irrigation.The total nitrogen content of extravasate did not change obviously with time,while its removal rate increased with the amount of mid-stage effluent.In order to treat with waste water as largely as possible but not influence groundwater simultaneously,extravasate which was treated by soil-plant system should be collected to irrigate farmland vastly.