Difference of organic components between Baijiu factory sludge and domestic sludge and risk assessment of leaching and migration
The contents of humic acid and low molecular weight organic acid in liquor factory sludge and domestic sludge were compared and analyzed,and the differences of organic components in the two sludges and their environmental risks of leaching migration were discussed.The results showed that the average con-tents of organic matter and humic acid(NaOH extraction)in the sludge of the winery were428.2 g/kg and 342.47 g/kg,respectively,which were 47.7%and 62.6%higher than the contents in domestic sludge.From the perspective of low molecular organic acid content in sludge leaching(H3 PO4 extraction),the con-tents of citric acid and malic acid in the sludge of the liquor factory reached 3.90 g/kg and 0.88 g/kg,respectively,which were 10.00 times and 1.83 times of the domestic sludge,while the oxalic acid content in the domestic sludge reached3.74 g/kg,which was2.94 times that of the sludge of the liquartery.The hu-mic acid of both sludges is rich in hydroxyl and phenolic hydroxyl groups,while the humic acid of liquor factory sludge is also rich in carboxyl groups.From the experimental results of six consecutive leaching of the two sludges,it can be seen that the COD and NH+4-N contents in the leaching solution of domestic sludge range from 121.5～380.5 mg/L and 1.83～10.67 mg/L,respectively,which are 55.8%and 27.2%higher than the distillery sludge.The TP content in the leaching solution of liquor factory sludge ranges from 0.84～1.90 mg/L,which is 28.1%higher on average than the content in the domestic sludge leaching solution,and the impact of the organic component leaching migration of liquor factory sludge on the water environment is less than that of domestic sludge.In summary,the organic components and resource utiliza-tion of humic acid of liquor factory sludge are better than those of domestic sludge.
NETL
NSTL
万方数据
