摘要:
A process for treating waste water containing chlorinated organic substances, particularly waste water from production of epichlorohydrin which contains more than 10 mg of adsorbable organic halogen compounds (AOX) per liter, comprising charging the waste water at a pH of 10 to 14 (measured at room temperature) into a reactor and maintaining a temperature of at least 75.degree.C., a pressure of at least 1 bar (abs.), and a residence time of at least 0.5 hours in said reactor, thereby partially dechlorinating and/or dehydrochlorinating chlorinated organic compounds contained in the waste water, and thereafter subjecting the waste water to further dechlorination and/or dehydrochlorination treatment in the presence of a hydrogen-containing gas, a hydrogen-releasing compound and/or a catalytically active material; and optionally subjecting the waste water to a biological treatment with the use of microorganisms; and apparatus for carrying out the foregoing process.
摘要:
A method for treating waste water which contains organic and inorganic compounds, particularly waste water from the synthesis of epichlorohydrins, in which the waste water is subjected toa) thermal-alkaline treatment,b) biological treatment, andc) optionally to chemical-oxidative treatment.
摘要:
The present invention relates to a process for decreasing the content of organic-chemical substances in waste water by chemical oxidation, preferably in the presence of chlorine, and optionally additional alkaline thermal treatment of the waste water, in which the waste water, which has a COD content (chemical oxygen demand) and is alkaline or is rendered alkaline, is introduced into at least one reactor and is treated at a temperature of more than 15.degree. C. with a chlorine-containing and/or chlorine-releasing chemical substance, the introduction of chlorine taking place in a quantity of more than 1 g chlorine/g COD (relative to the chlorine content of the chlorine-containing and/or chlorine-releasing chemical substance), and a molar ratio of OH.sup.- to chlorine of more than 1.5 and a pH value of the waste water of .gtoreq.5 being maintained or set, and the resulting chlorine-treated, hypochlorite-containing waste water is subjected to a reaction time of more than 0.25 hours, with the organic compounds being at least partially oxidized, and subsequently the waste water is treated further and/or is discharged or drained from the reactor.
摘要翻译:本发明涉及通过化学氧化,优选在氯存在下降低废水中有机化学物质含量的方法,以及任选地对废水进行附加的碱热处理,其中废水具有 COD含量(化学需氧量)为碱性或碱性,被引入到至少一个反应器中,并在含氯和/或氯释放化学物质的情况下在大于15℃的温度下进行处理, 以氯/ g COD(相对于含氯和/或释氯化学物质的氯含量)计,氯气的引入量,OH-与氯的摩尔比大于 1.5,并且维持或设定≥5的废水的pH值,所得氯处理的次氯酸盐废水经受大于0.25小时的反应时间,有机碳 影响至少部分氧化,随后废水进一步处理和/或从反应器排出或排出。