PMID: 16634231Apr 26, 2006Paper

Evaluation of bangkok sewage sludge for possible agricultural use

Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA
N PasdaD Montange

Abstract

Bangkok (Thailand) covers more than 1500 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 E.U. or U.S. 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...Continue Reading

Citations

Jul 10, 2013·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Siranee SreesaiSuthipong Sthiannopkao
Jun 26, 2017·Environmental Monitoring and Assessment·Md M RashidChikashi Sato
Sep 14, 2018·Environmental Monitoring and Assessment·Rodrigo Custodio Urban, Ricardo de Lima Isaac
Sep 28, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Nuanchan Singkran

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