餐厨垃圾发酵废液组分表征

Analysis of composition in kitchen waste fermentation wastewater

餐厨垃圾发酵废液是在利用餐厨垃圾发酵产乙醇的过程中蒸馏后产生的废液。为研究分析餐厨垃圾发酵废液的组成成分,利用国家标准方法对其常规水质指标、无机离子进行了检测,并利用三维荧光光谱技术和固相萃取—GC/MS技术对其有机物组分进行了分析。结果表明:餐厨垃圾发酵废液为SS=1 000 mg/L,COD=60 000 mg/L的高悬浮物、高浓度有机废液,TN和TP含量分别为700 mg/L和180 mg/L,废液可生化性好;其金属阳离子和无机阴离子以Na+、Cl-为主,浓度分别为1 200 mg/L和2 200 mg/L;有机物组分以芳香族蛋白质类物质为主,约占有机物总量的80%;在可挥发性有机组分中,餐厨垃圾发酵废液中以酸类和醇类物质为主,易于生物降解,且有可回收利用价值。

Kitchen and fermentation wastewater is generated during the distillation process in alcohol fermentation by using kitchen and food waste. In order to study the composition of it, the conventional water quality index and inorganic salt ions were measured by the national standard methods, and the organic components were detected by using three dimension fluorescence spectrometry technology and solid phase extraction-GC / MS. The results show that kitchen waste fermentation wastewater contents a high level of suspended solid and organic matters,with 1 000 mg / L of SS,60 000 mg / L of COD,700 mg / L of TN,180 mg / L of TP,but it has a good biodegradability. The concentrations of Na＋and Cl-are 1 200 mg / L and 2 200 mg / L,respectiuely,which take the main position in the metal cation and inorganic anions in the wastewater. In the wastewater,aromatic protein accounts for about 80% of total organic components and acids and alcohols take the main part of the volatile organic components,which are easily degraded by bacteria and also have the recyclable value.