Waste Management & Research

 

Advanced Search

Journal Navigation

Journal Home

Subscriptions

Archive

Contact Us

Table of Contents

Sign In to gain access to subscriptions and/or personal tools.
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to Saved Citations
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Request Reprints
Right arrow Add to My Marked Citations
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Pasda, N.
Right arrow Articles by Montange, D.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Pasda, N.
Right arrow Articles by Montange, D.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
Waste Management & Research, Vol. 24, No. 2, 167-174 (2006)
DOI: 10.1177/0734242X06063347

Evaluation of Bangkok sewage sludge for possible agricultural use

Nuanjun Pasda

Department of Soil Science, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand

Supamard Panichsakpatana

Department of Soil Science, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand

Pitayakon Limtong

Department of Land Development, Ministry of Agriculture and Cooperatives, Bangkok, Thailand

Robert Oliver

CIRAD CA - TA 70/01, Montpellier Cedex 5, France

Denis Montange

CIRAD CA - TA 70/01, Montpellier Cedex 5, France, denis.montange{at}cirad.fr

Bangkok (Thailand) covers more than 1 500 km2 and has 10 million inhabitants. The disposal of wastewater is creating huge problems of pollution. The estimated amount of sewage sludge was estimated to be around 108 tonnes dry matter (DM) per day in 2005. In order to find a lasting way of disposal for this sewage sludge, the suitability of the sludge produced from three waste-water treatment plants for use as fertilizing material was investigated. Monthly samplings and analysis of sewage sludge from each plant showed that the composition of sludge varied according to the area of collection and period of sampling, and there was no link to rainfall cycle. Plant nutrient content was high (i.e. total N from 19 to 38 g kg-1 DM) whereas organic matter content was low. The concentrations of heavy metals varied between sludge samples, and were sometimes higher than the EU or US regulations for sewage sludge use in agriculture. Faecal coliforms were present in the sludge from one of the plants, indicating a possible contamination by night soil. In order to decrease this potentially pathogenic population the sewage sludge should be heated by composting. As the C/N ratio of sewage sludge was low (around 6) some organic by-products with high carbon content could be added as structural material to enhance the composting.

Key Words: Bangkok • sewage sludge • composition • heavy metals • pathogens • composting • wmr 787-8


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?