Investigation of a direct melting dehydrated sewage sludge pilot plant
by Premrudee Kanchanapiya, Takeo Sakano, Chikao Kanaoka, Tokuyoshi Mikuni, Yoshihiko Ninomiya, Lian Zhang, Megumi Masui
International Journal of Environment and Pollution (IJEP), Vol. 31, No. 3/4, 2007

Abstract: A direct melting dehydrated sewage sludge furnace was tested to obtain the basic operating parameters. Observation of particles (fly ash and deposited particulates) inside the pilot plant was performed to determine the particle properties. The results showed that dehydrated sewage sludge could be directly melted at a temperature of 1400°C with stable combustion. With regard to the fly ash, the majority of the particle size distribution was observed to be in the range 0.1–1 µm, and amongst heavy metals, the highest concentration in the ash was for zinc. For the deposited particle fraction, most were observed to be in the size range 2–20 µm and the main inherent chemical compound was associated with metal phosphate. Moreover, at different temperatures inside each chamber, the compositions and chemical compounds were found to change. To estimate the amount of deposited particles, the deposition flux was calculated by various deposition mechanisms, and it was found that diffusion was the dominant deposition mechanism, followed by thermophoresis and gravity, respectively.

Online publication date: Thu, 03-Jan-2008

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Pollution (IJEP):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com