摘要
以低温热碱破解低有机质污泥,考察了不同热碱条件下低有机质污泥破解情况,通过DNA释放量分析了污泥细胞破解效果,同时,研究了污泥中磷形态分布与变化。结果表明,从污泥破解程度(DD)与DNA释放量来看,热碱联合可强化污泥破解,而pH比温度起更重要作用,尤其对污泥破解释磷起关键作用。高pH条件下,污泥中有机磷(OP)和非磷灰石无机磷(NAIP)以磷酸盐的形式大量溶解,而磷酸盐与钙离子反应导致磷灰石(AP)含量升高。研究认为,仅加碱pH=13即可有效破解低有机质污泥,操作简单,有利于污泥减量,且磷回收潜力大。
This study investigated the disintegration and phosphorus forms of alkaline pretreatment with low-temperature heating for low-organic sludge.Batch experiments with different temperature and alkalization were carried out to explore the cell damage,nucleic acid release and phosphorus forms,etc.Results demonstrated that the thermal and alkaline pretreatment effectively enhance sludge disintegration based on sludge disintegration degree （DD） and the nucleic acid release,but pH presented the predominate role in the whole process of pretreatment,especially in the phosphorus release.With high pH,plenty of the organic phosphorus （OP） and the nonapatite inorganic phosphorus （NAIP） released in the form of soluble phosphate.And apatite phosphorus （AP）also increased because of the reaction of phosphate and calcium ion.The present research indicated that the loworganic sludge could be broken effectively at pH = 13 with simple procedure,in favor of sludge reduction,as well as considerable potential of phosphorus recovery.
作者
许德超
周礼杰
尹魁浩
彭盛华
成功
XU Dechao ZHOU Lijie YIN Kuihao PENG Shenghua CHENG Gong(State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen Key Laboratory of Drinking Water Source Safety Control, Shenzhen Key Laboratory of Emerging Contaminants Detection ＆ Control in Water Environment, Shenzhen Academy of Environ- mental Sciences, Shenzhen 518001, China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2017年第10期5621-5629,共9页
Chinese Journal of Environmental Engineering
基金
深圳市科技计划项目(CXZZ20150330151321966
KJYY20150430175426620)
关键词
低温热碱
低有机质污泥
破解
磷形态
low-temperature thermo/alkaline
low-organic sludge
disintegration
phosphorus forms
