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香樟树枝堆肥产物与盾构脱水泥共堆肥的效果
杨海君1, 金红玉1, 肖为2, 肖路2, 刘亚宾1, 谭菊3
1.湖南农业大学 植物保护学院, 湖南 长沙 410128;2.湖南锦佳环保科技有限公司, 湖南 长沙 410129;3.长沙市环境监测中心站, 湖南 长沙 410001
摘要:
[目的] 实现两种城市固体废弃物盾构脱水泥和香樟树枝堆肥产物同时最大化处置与利用,从而推进园林绿化废弃物与城市盾构污泥资源化产品的应用。[方法] 以盾构脱水泥与香樟树枝堆肥产物分别按照25:1,30:1,20:1,25:1比例(质量比)调配一级、二级草坪种植土与一级、二级花坛种植土,考察4种比例下共堆肥过程中阴离子表面活性剂AES的降解特征以及堆肥发酵产物的主要元素含量与盆栽试验。[结果] 盾构脱水泥与香樟树枝堆肥产物分别以25:1,30:1,20:1,25:1比例堆肥20 d的产物均满足《绿化种植土壤CJ/T340-2016》一级、二级草坪种植土与一级、二级花坛种植土要求。共堆肥明显促进了盾构脱水泥中主要污染物AES的降解,堆肥20 d后产物中AES表面活性剂含量均下降了75.24%以上。盆栽试验结果发现,堆肥终产物一级草坪土与二级草坪土种植马尼拉种子的发芽率分别为92%与86%;一级花坛土中移栽杜鹃与二级花坛土中移栽满天星的成活率均为100%。[结论] 香樟树枝堆肥产物与盾构脱水泥混合共堆肥,不仅有利于盾构脱水泥的环保处置,堆肥后可进行二次利用,而且促进了盾构泥中AES的降解,降低了盾构脱水泥中AES对环境的危害。
关键词:  香樟树枝  盾构脱水泥  堆肥  土壤元素含量  盆栽试验
DOI:10.13961/j.cnki.stbctb.2020.02.027
分类号:S141.4;X713
基金项目:湖南省自然科学资助项目"加拿大一枝黄花入侵机制及其防控研究"(2018JJ5015);长沙市雨花区科学技术局(雨财发[2018]50号)
Efficiency of Co-compost of Cinnamomum Camphora Branch Compost and Shield Decement
Yang Haijun1, Jin Hongyu1, Xiao Wei2, Xiao Lu2, Liu Yabin1, Tan Ju3
1.College of Plant Protection, Hu'nan Agricultural University, Changsha, Hu'nan 410128, China;2.Hu'nan Jinjia Environmental Protection Technology Co., Ltd, Changsha, Hu'nan 410129, China;3.Changsha Environmental Monitoring Center Station, Changsha, Hu'nan 410001, China
Abstract:
[Objective] Two kinds of municipal solid waste, shield decement and Cinnamomum camphora branch, were disposed and utilized to the maximum at the same time, in order to promote the application of landscaping waste and urban shield sludge recycling products.[Methods] The products of shield decement and Cinnamomum camphora branch compost were treated with a proportion of 25:1, 30:1, 20:1, 25:1, respectively. Proportion (quality ratio) was used to prepare grade 1 and grade 2 lawn planting soil and grade 1 and grade 2 flower bed planting soil. The degradation characteristics of AES during composting and the nutrient element content of composting fermentation products and pot experiments were then investigated.[Results] The compost products of decement and composting of Cinnamomum camphora branches with the ratios of 25:1, 30:1, 20:1 and 25:1 (mass ratio) for 20 d met the requirements of grade Ⅰ and Ⅱ lawn planting soil and grade Ⅰ and Ⅱ flower bed planting soil in "green planting soil CJ/T340-2016". Co-composting significantly promoted the degradation of AES, which was the main pollutant in shield decement, and the content of AES surfactant in the products after 20 days of compost decreased by more than 75.24%. The results of pot experiment showed that the germination rate of Manila seeds planted in primary and secondary turf soil was 92% and 86%, respectively. The survival rate of transplanted azalea in first-grade and second-grade flower bed soil was 100%.[Conclusion] The composting product of Cinnamomum camphora branch mixed with shield demulsification is not only beneficial to the environment friendly disposal of shield demulsification, but also can be reused after composting, promotes the degradation of AES in shield demulsification mud, and reduces the harm of AES in shield demulsification to the environment.
Key words:  Cinnamomum camphora branch  shield decement  compost  element contents  pot experiment