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1 Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska

1 2003

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Status and countermeasures of sewage sludge treatment and disposal in Beijing

Xiaoying Z., Yuwen Z., Hongying R.

Zeszyty Naukowe. Inżynieria Środowiska / Politechnika Opolska

2003

Vol. 291, z. 4

511-517

The problem of sewage sludge treatment and disposal is becoming more and more serious with the rapid development of sewage treatment in Beijing. In this paper, the status and problems of Beijing sewage sludge treatment and disposal are analyzed, and the components of sludge are also analyzed. At present, a sewage sludge treatment and disposal center is in operation in Beijing, treating and disposing the sludge from the 5 existing wastewater treatment plants in Beijing. It is an achievement, but also has certain problems which are needed to be solved for the safety use of sludge. The analysis of sludge components shows that there are rich plant nutrients and organics in the sludge, and also a large number of pathogenic microorganisms which needed to be killed. The concentrations of certain kinds of heavy metals exceed the Chinese standards of sludge for agricultural purpose. So it is very important to adopt rational and effective treatment processes to make sludge harmless before it is used for agricultural purpose or other purposes. The countermeasures probed here include: establish relative standards concerning sewage sludge treatment and disposal, study techniques of sludge volume reduction and thermal drying, study the utilization of sludge as resources, establish sewage sludge treatment and disposal center and improve the sewage sludge treatment and disposal processes.