杨木NaOH常压浸渍废液污染物成分和可生化性分析

Contamination Composition and Biodegradability Analysis of Poplar NaOH Atmospheric Impregnation Waste Liquor

关键词:  NaOH常压浸渍  污染特性  污染物指标  可生化性

Key Words:NaOH atmospheric pressure  pollution characteristics  pollutant index  biodegradability

摘要:采用红外光谱、紫外光谱、气相色谱-质谱联用仪（GC-MS）定性、定量分析了杨木NaOH常压浸渍废液的污染成分，以确定其污染特性和可生化性评价。结果表明，废液中含有的有机物结构包括苯环、羟基、醚基、氨基、酚羟基、—OCOR助色基团和羰基等基团；可能含有的有机物种类有烷烃、酚或醇、芳香族化合物、糖、醚类、酚类、羧酸类物质等；相对含量较多的为酯类、烷烃类、芳香族化合物、醛酮类以及有机酸等有机化合物。木质素浓度为2539 mg/L，糖类物质浓度为4728 mg/L；废液的悬浮物浓度、可溶性固形物浓度、可溶性有机固形物浓度分别为4636、4878和860 mg/L；其COD_Cr、BOD₅浓度分别为29216 mg/L和19400 mg/L，C∶N∶P=100.15∶4.62∶1。废液中污染物成分复杂，有机污染物浓度较高，废液具有良好的可生化性。若对废液进行厌氧处理时可能需补充N、P元素。废液中硫酸盐、硝酸盐、亚硝酸盐和氨氮等抑制厌氧处理过程的污染物含量未达到抑制浓度。

Abstract:Waste pollution characteristics analysis could provide reliable basis for the subsequent treatment.In order to identify the pollution composition of poplar NaOH atmospheric impregnation liquor， determine its polluting property and biodegradability， Infrared Spectroscopy， Ultraviolet Spectroscopy and GC-MS were used to qualitatively and quantitatively analyze the contaminants in the waste liquor. The results showed that the organic structures in the waste liquor included benzene， saturated hydrocarbon， hydroxyl， ether group， amine， —OCOR auxochrome group， phenolic hydroxyl group and carbonyl group. The types of organic compounds that may be contained include alkane， phenol or alcohol， aromatic compounds， carbohydrate， ethers， phenolic substances， carboxylic acids， etc.The relative higher contents of organic compounds were such as esters， alkanes， aromatic compounds， aldehydes and organic acids. The concentration of lignin and carbohydrate were 2539 mg/L and 4728 mg/L. The concentrations of suspended matter， soluble solids and soluble organic solids in the waste liquor were 4636， 4878 and 860 mg/L， respectively. The COD_Cr and BOD₅ were 29216 and 19400 mg/L. C∶N∶P =100.15∶4.62∶1. It was concluded that the waste liquor had complex contamination composition， high concentration of organic pollutants and good biodegradability. N and P elements was probably supplemented when the waste liquor was treated with anaerobic process.The pollutant content of sulphate， nitrate， nitrite and ammonia nitrogen in the waste liquor didn't reach the inhibitory concentration.