REGIONAL TREATE BULK WATER Pestesides区域处理散装水pestesides.pptVIP

Applicability (target contaminants) Minimum achievable concentration Reliability and maintenance Residues/by-products (post treatment needed?) Overall cost Public acceptability Safety Development status Environmental impacts Performance dependency on site characteristics Clean-up time required Decontaminated soil quality Site data needed ………. A. Lodolo, (ICS UNIDO), Training Workshop “Initial National POPs Inventory - INPOPsI” 16 - 17 May 2002Brno, Czech Republic All high temp. Technologies will face the difficulty to overcome de novo synthesis during cooling – every technology pass the de novo window. For the high temperature destruction technologies the operation stability and fate of unstable operation has to be assessed. Short term unstable operation have the potential of very high PCDD/F output if precurser compounds are in the waste feed. This can only be done by continuous monitoring. . The reason why I want to destingquish the three pathways although they lead to the same result –Dioxins - is that differ in orders of magnitude in their formation potential – therefore I want to separate The majority of destruction technologies utilize thermal degradation for POPs remediation. Three formation routes of PCDD/PCDF have to be considered for these high temperature destruction technologies: a) Formation of PCDD/PCDFs within the high temperature zone; b) emission of PCDD/PCDF precursors from the high temperature processes and formation of PCDD/PCDFs in the cooling zone; c) formation of PCDD/PCDFs via degradation of products of incomplete thermal destruction (soot, PAHs etc.) in the cooling zone (de novo synthesis). The base line remediation technology for PCBs is incineration. A safe destruction demands state of the art hazardous waste incinerators, which are only available in a few countries. Alternative PCB/POPs destruction technologies have been proposed during the last two decades or are already commercially applied. Supercritical water oxidation