Study On Treatment Of Wastewater From Color Kinescope Production By Loading Flocculation Technology

The coagulation-flocculation-clarification process is one of the most indispensable and main treatment technologies all along, which is applied for the treatment of water and wastewater, and the process effectiveness has a direct impact on the operational performance, final effluent water quality and operational cost. It is therefore a frontier subject in the water and wastewater treatment field to improve the performance of coagulation-flocculation-clarification process and realize the efficient flocculation and clarification.The loading flocculation process usually by means of sludge recirculation is the innovative and efficient solid/liquid separation technology, which is developed and explored based on the contact flocculation and accelerated clarification technology by applying the flocculation morphology theory. In this technology, proper loading chemical with large specific density is applied to form the compact"agglomerate cores"with colloid characteristic in the period of mixing and flocculation. The fine particles in water can be adsorbed and rolled by the"agglomerate cores"intensively and the larger compact flocs can be agglomerated through the collision between the"agglomerate cores", which then settled quickly in the sedimentation period, thus realising the efficient solid/liquid separation.The operational performance, such as effluent water quality, settling rate and water content in the sludge of the different conventional processes for treating wastewater from color kinescope production was studied, and the feasibility and limitation of these conventional processes were also described in this paper by analyzing the resuts of pilot and full scale tests. The results showed that in the case of using lime as only coagulant, the one stage flocculation-clarification process with lime is not available to be used to treat wastewater from color kinescope production with fluorine (FD) because of the large chemicals consumption, poor ability of pollution tolerant loading, low settling rate and high operation cost. Although the efffluent pollution concentration could be lower than the efffluent standard by the existing two-stage flocculation-clarification process, the total amount of effluent pollution concentration could not meet the demand and the treated wastewater could...