Rich students FIG processing factory in Xiamen dyeing wastewater dyeing wastewater

Dyeing wastewater treatment mainly wastewater treatment processes such process currently more, but most of the biochemical process based (1) contact oxidation plant wastewater → grid → regulating pool → pump → acidification hydrolysis → contact oxidation → precipitation → Floatation → bleaching tank → discharge aerobic stage of this process using contact oxidation method, the advantage of simple, convenient operation, easy management, high resistance to shock loading, low sludge production, its shortcomings are: maintenance problems, biofilm growth to a certain When will shed affect water quality, packing easy blockage. This process is mainly used to 1500m3 / d following dyeing wastewater treatment. (2) activated sludge plant wastewater → grid → regulating pool → pump → → activated sludge hydrolytic acidification coagulation sedimentation tank → → bleaching → filtration tank → discharge aerobic stage of this process using activated sludge, its advantages investment moderate, stable, good effect, easy maintenance, less maintenance, moderate operating cost, mature technology, construction easier. There are prone disadvantage sludge bulking sludge bulking can be controlled through proper administration, the amount of sludge produced little more than contact oxidation method, an area slightly larger than the contact oxidation process. This process is mainly used to 2000m3 / d above dyeing wastewater treatment. (3) pulp dyeing wastewater, printing wastewater treatment plant wastewater → grid → regulating pool → pump → coagulation reaction tank materialized sedimentation tank → → → activated sludge hydrolytic acidification coagulation sedimentation tank → → bleaching → filtration tank → discharge Since the pulp dyeing and printing waste water raw water concentration is relatively high, if directly into the biological treatment, high load biological treatment system, therefore required prior to biological treatment system to increase some physico-chemical treatment systems. Generally, printing and dyeing wastewater treatment, there are four, physical treatment, chemical treatment, biological treatment, alkali reduction treatment method. Dyeing Wastewater physical treatment adsorption method: This method is a powder or granular activated carbon, clay and other porous substance mixed with water, or let the water through its filter bed consisting of granular material, the waste water of pollutants are adsorbed or on the surface of a porous substance was removed by filtration. Activated carbon adsorption to remove water soluble buttoned L was very effective, but it can not remove the water and the hydrophobic colloidal dye, and only cationic dyes, direct dyes, acid dyes, reactive dyes and other water-soluble dyes have good Adsorption. Kaolin adsorbent can effectively adsorb wastewater yellow direct dye. In addition, the country will also use active diatomaceous earth and cinder traditional dyeing process wastewater treatment, lower cost, better bleaching, the drawback is the large amount of sludge produced and further processing difficult. Guangzhou Fu students environmental Xingtan dyeing centralized wastewater treatment works (3600m3 / d):