高压蒸汽消化法测定废水化学需氧量的再研究

Furtner Researchs determining the Chemical Oxygen Demand in Wastewater with High pressure Digestion

用＂自控式高压蒸汽消解器＂作为高压蒸汽消化法测定废水化学需氧量的消化装置，详细研究了消化条件，最后确定，消化体系中（１／６）Ｋ２Ｃｒ２Ｏ７浓度为０１ｍｏｌ／Ｌ，Ｈ２ＳＯ４浓度为１０．１ｍｏｌ／Ｌ，催化剂Ａｇ＋浓度为０．０３ｍｏｌ／Ｌ，消化温度为１３０℃，恒温时间为２０ｍｉｎ。用此方法和条件测定了１２种单纯有机化合物和１６种不同工业废水的化学需氧量，与标准回流法相比，相对误差在－５．５－６．０％之间。

Method of high pressure digestion for determining the chemical oxygen demand with a control high pressure digestor were further researched,defined optimum digestion cinditions are that concentrations of 1/6 K2Cr2O7,H2SO4,Ag+(as cptalyst) are respectally 0.1 mol/L,10.1mol/L and 0.03 mol/L.digestion temperature and constant heated time are 130℃ and 20min,respectally.The chemical oxygen demand of 12 single-organic compounds and 16 different type industrial wastewater wrer determined by the method and compared to standard method,maximum relative error are between-5.5-6.0%.