摘要
采用三氯化铁(FeCl3)和聚丙烯酰胺(PAM)作为河流疏浚底泥的脱水药剂。研究表明,在FeCl3投加量250mg·L-1,阴离子PAM投加量10mg·L-1的条件下,含水率85%的底泥在100min后能够脱水至原有体积的50左右;上清液能够达到GB18918-2002中规定的一级B排放标准。脱水后的底泥在自然状态下干化60d后,承载力可以达到100kPa,强度能够满足景观绿化用土。经过经济核算,处理1m3疏浚干底泥的运行费用约为3.47元。本研究为河道和湖泊疏浚底泥的处置和利用提供了一种可行的技术途径。
Ferric trichloride and PAlM were used to dewater the dredged sediment. The test results revealed that the volume of dredged sediment containing 85% water could be reduced by about 50% in 100 minutes under the condition of dosing Ferric trichloride 250 mg·L^-1 and PAM 10 mg·L^-1, and the supernatant quality could meet the discharge standard of first-rate A issued in GB18918-2002. The dewatered sediment dried in nature state for 60 days, the bearing load reached 100 kPa and could be used as plant soil. In addition, it was calculated that the operating cost for dewatering dredged sediment was about 3.47 yuan, which also supplied a feasibility way for treating and utilizing dredged sediment.
出处
《水处理技术》
CAS
CSCD
北大核心
2008年第12期50-53,共4页
Technology of Water Treatment
