铁对生活垃圾堆肥影响的研究进展

Research Progress on the Effect of Iron on Aerobic Composting of MSW

随着人民生活水平不断提高,我国生活垃圾产生量日益增加,其处理处置是极大挑战。在诸多处理处置方法中,好氧堆肥处理技术具有高效稳定的特点,同时具有附加经济价值,是对生活垃圾进行处理处置的有效手段之一。铁作为微生物生长代谢必不可缺的元素之一,对生活垃圾好氧堆肥至关重要。首次系统介绍了铁来源、性质及微生物对铁的利用途径,总结了铁对堆肥过程中微生物的影响,并从pH、氧化还原电位、有机物降解率、磷的利用率、腐殖质形成程度等方面总结了铁对堆体的影响及作用机制,提出铁作为生活垃圾好氧堆肥的添加剂改善堆肥产物、提高堆肥效率的思路。在此基础上,评价了铁对堆肥的改善作用应用到实际工程中的可行性,并总结了铁在好氧堆肥处理过程中用作添加剂的优缺点。

With the increased living standards of human beings,the production of MSW in China keeps increasing,which poses a big challenge to its treatment and disposal.Among numerous methods for the treatment and disposal of MSW,aerobic composting treatment technology is one of the effective means for the treatment and disposal of MSW,which has the characteristics of high efficiency and stability,as well as additional economic value.Iron,as one of the essential elements for the growth and metabolic activities of microorganisms,is crucial for aerobic composting of MSW.The sources and properties of iron and the utilization of iron by microorganisms were introduced systematically for the first time.The effect of iron on microorganisms in composting process was summarized.The effect of iron on the reactor and its mechanism was summarized in terms of pH,oxidation-reduction potential,organic degradation rate,phosphorus utilization rate,and humus formation degree are summarized.And it was suggested that iron could be used as an additive in MSW aerobic compost to improve the composting product and improve the composting efficiency.On this basis,the feasibility of the improvement effect of using iron on aerobic composting applied to practical engineering was evaluated,and the advantages and disadvantages of iron used as additive in aerobic composting were summarized.