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【澳门皇冠金沙网站】厂家分享造纸废水如何处理

时间:2019-12-17
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  造纸废水主要来源于制浆造纸和复印纸两个生产过程。制浆是将植物原料中的纤维分离成纸浆,然后进行漂白;抄写纸是将纸浆稀释、成型、压制、干燥、制成的纸。
  Papermaking wastewater mainly comes from two production processes of pulp and paper making and photocopy paper. Pulping is to separate the fibers in plant raw materials into pulp, and then carry out bleaching; paper copying is to dilute, shape, press, dry and make pulp.
  这两种方法都会产生大量的废水。制浆产生最严重的废水污染。在洗涤过程中,排放的废水是黑色和棕色的,这被称为黑色水。黑水中污染物浓度非常高,BOD高达5-40g /L,含有大量的纤维、无机盐和色素。漂白过程排出的废水也含有大量的酸碱物质。造纸机排出的废水称为白水,在生产过程中加入了大量的纤维、填料和凝胶。
  Both methods produce a lot of waste water. Pulping produces the most serious wastewater pollution. In the washing process, the waste water discharged is black and brown, which is called black water. The concentration of pollutants in black water is very high, BOD is as high as 5-40g / L, which contains a lot of fibers, inorganic salts and pigments. The waste water from bleaching process also contains a lot of acid and alkali substances. The waste water discharged from the paper machine is called white water, and a large number of fibers, fillers and gels are added in the production process.
【澳门皇冠金沙网站】
  造纸工业废水的处理应注重提高回转率,减少用水量和废水排放量,积极探索可靠、经济、有效的处理方法,充分利用废水中的有用资源。如浮选法可回收白水中的纤维状固体物质,回收率可达95%,澄清水可重复利用。燃烧法可回收水中的氢氧化钠、硫化钠、硫酸钠等与有机物结合的钠盐。
  In the treatment of papermaking wastewater, we should pay attention to improving the rotation rate, reducing water consumption and wastewater discharge, actively explore reliable, economic and effective treatment methods, and make full use of the useful resources in the wastewater. For example, the method of flotation can recover the fibrous solid matter in white water, the recovery rate can reach 95%, and the clarified water can be reused. Sodium hydroxide, sodium sulfide, sodium sulfate and other sodium salts combined with organic compounds can be recovered by combustion.
  采用中和法调节废水的pH值。废水中的悬浮物可通过混凝沉淀或浮选去除。化学沉淀可脱色;生物处理可以去除生化需氧量,对牛皮纸废水的处理效果更佳。湿法氧化法处理亚硫酸盐纸浆废水取得了较好的效果。此外,国内外还采用反渗透、超滤、电渗析等治疗方法。
  The pH value of wastewater was adjusted by neutralization method. The suspended solids in wastewater can be removed by coagulation sedimentation or flotation. Chemical precipitation can decolorize; biological treatment can remove biochemical oxygen demand, and the treatment effect of kraft paper wastewater is better. The treatment of sulfite pulp wastewater by wet oxidation method has achieved good results. In addition, reverse osmosis, ultrafiltration and electrodialysis are also used at home and abroad.
  以上是【澳门皇冠金沙网站】厂家为大家先容的相关内容,想要了解更多内容,欢迎访问网站:The above is the relevant content introduced by the bio desulfurization manufacturer. To learn more, please visit the website:
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