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

Volume

3

fYear

2009

fDate

16-18 Oct. 2009

Firstpage

400

Lastpage

403

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy and Environment Technology, 2009. ICEET '09. International Conference on

Conference_Location

Guilin, Guangxi

Print_ISBN

978-0-7695-3819-8

Type

conf

DOI

10.1109/ICEET.2009.562

Filename

5367045