Title :
Modified Diatomaceous Earth for Sludge Settlement Amelioration
Author :
Cui, Yubo ; Liu, Lizhan ; Guo, Zhiqian ; Peng, Xueyan
Author_Institution :
Dept. of Environ. Eng., Dalian Nat. Univ., Dalian, China
Abstract :
Diatomaceous earth (DE) was modified with chemicals, which were composed of ferric chloride, aluminium sulfate and aluminium polychlorid on the base of mass fraction of 1: 5: 5 and named mixed coagulant (MC) herein, and used for waste sludge conditioning for the purpose of improving sludge settling performance and supernatant suspended solid (SS) removal. The results showed that sludge velocity (SV) decreased with modified diatomaceous earth (MDE) dosage increase, MDE brought in the highest 72% of sludge supernatant SS removal. From technical and economical points of view, the optimum dosage of MDE is 0.2 g DE and 0.33 g MC per liter waste sludge.
Keywords :
aluminium compounds; coagulation; iron compounds; rocks; sludge treatment; AlS; FeCl; coagulant; modified diatomaceous earth; sludge settlement amelioration; suspended solid removal; waste sludge conditioning; Aluminum; Chemical technology; Earth; Model driven engineering; Moisture; Power engineering and energy; Sludge treatment; Solids; Surface treatment; Wastewater treatment; modified diatomaceous earth; phosphorus removal; sludge pretreatment; turbidity;
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.562
