不同填料对脱水污泥好氧堆肥效果的影响

Effect of different fillers on aerobic composting of dewatered sludge

采用好氧条垛式堆肥方法,研究秸秆和稻壳作蓬松剂和调理剂、沸石和粉煤灰作调水剂对污泥堆肥效果的影响,为污泥的土地合理利用提供依据。结果表明,秸秆处理组均达到无害化和腐熟化标准,而稻壳处理组未达到堆肥标准;粉煤灰处理与沸石处理差异不大。以秸秆为蓬松剂和调理剂,以粉煤灰或沸石为调水剂,污泥好氧堆肥后肥料的各项指标均达到国家有机肥标准,表明以废物秸秆和粉煤灰为污泥堆肥填料更具发展前景。

The method of aerobic windrow composting was used in this experiment. It was studied that effects of straw and rice husk as bulking agents and conditioner, zeolite and fly ash as adjusting agent on sewage sludge composting, in order to provide the basis for reasonable land utilization of sludge. The test results showed that： the straw treatment groups all reached the standard of harmless and decomposed, but rice husk treatment groups did not reach the standard; fly ash treatments and zeolite treatments were no differences. Under the condition of straw as bulking agents and conditioner, fly ash or zeolite as adjusting agent, sludge was composted. Fertilizer index after composting had reached the national standard for organic fertilizer. There were more development prospects with waste straw and fly ash as the sludge compost filler.