摘要
通过在城市污水厂的脱水污泥上直接种植草坪草,考察了草坪草对污泥的适应性和处理效果。露天试验结果表明,海雀稗、狗牙根、杂交狗牙根、钝叶草、中华结缕草、地毯草等6种草在未处理的污泥上可快速生长,对污泥的适应性较强,在夏季一个月内即可达到100%的覆盖度,符合绿化用途要求。塑料大棚试验结果表明,杂交狗牙根、钝叶草和地毯草的生物量较大,能较快而有效地降低污泥的含水量和大肠菌群数,对污泥的干燥和稳定效果较好。同时,污泥中含有丰富的营养元素,可作为长效的有机肥源供给草坪的生长。
By planting turf grass on the dewatered sludge from municipal WWTP, the adaptability of turf grass to dewatered municipal sewage sludge and its treatment effect were investigated. In the out- door experiment, Paspalum vaginatum, Cynodon dactylon, C. dactylon x C. transvaalensis, Steno- taphrum helferi, Zoysia. sinica and Axonopus compressus can rapidly grow on the raw sludge, and they have strong adaptability to the sludge. The total coverage can be achieved within 1 month in summer, and the greening requirement is met. In the plastic greenhouse experiment, C. dactylon ~ C. transvaalensis, Stenotaphrum helferi and Axonopus compressus, having a higher biomass, can effectively reduce the water content and the number of E. coli in the sludge, dry and stabilize the sludge. Furthermore, the sludge containing abundant nutrient contents can be used as a long-term organic fertilizer source for the grass growth.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第13期52-54,57,共4页
China Water & Wastewater
基金
环保公益性行业科研专项(200809093)
国家科技支撑计划项目(2007BAD89B14)
关键词
城市污泥
草坪草
干燥
稳定
municipal sludge
turf grass
drying
stabilization
