【摘要】 随着我国污泥产量的急剧增加,污泥干化冷凝水的产量也在快速增加。由于污泥干化冷凝水其独特的水质特征,专门针对此类冷凝水的生物处理技术目前还非常不成熟。本研究以污泥导热干化冷凝水为研究对象,分析了其主要的水质特征,并结合实际运行结果,对污泥干化冷凝水的生物处理给出建议。分析结果显示,污泥干化冷凝水p H为5.3左右,氨氮、挥发性脂肪酸(VFA)、COD浓度分别为(1 130±320)mg/L、(6 840±1 150)mg/L、(13 810±3 280)mg/L,属于高浓度有机废水。同时,冷凝水中宏量元素和微量元素非常缺乏,会严重影响活性污泥的正常代谢以及沉降性能,通过补加缺乏元素或配比适量生活污水,活性污泥性能可得到明显改善。更多还原

【Abstract】 The condensate from sludge drying has been greatly increased with the rapid increase of sludge production in China. However,biological treatment technology suitable for the condensate is still in its infancy due to its little-known water quality characteristics. In this study,water quality characteristics of the condensate from conductive sludge drying were investigated and some specific suggestions for its biological treatment were offered.The results showed that p H value of the condensate was about 5. 3,and the concentrations of NH+4-N,volatile fatty acids( VFA),and COD were( 1 130 ± 320) mg / L,( 6 840 ± 1 150) mg / L,and( 13 810 ± 3 280) mg / L,respectively. Therefore,the condensate was considered to be a kind of high concentration organic and ammonia nitrogen wastewater. Meantime,the condensate was found to be severely lack of macro elements and trace elements,which significantly affected the metabolism and settleability of activated sludge in the biological treatment system.When it was added with the macro and trace elements or adjusted by domestic sewage,the activated sludge settleability could be improved obviously.更多还原