Main problems in sewage sludge
usage would be the presence and accumulation of heavy metals in soils, affecting negatively plant growth and causing biosecurity problems.
The aim of this research is to develop the cement replacement material from waste paper sludge
collected from paper pulp industries Kotri, Hyderabad, Sindh, Pakistan.
During exploration several tons of oily sludge
has been produced which is dumped in an open pit and causes severe environmental threat to the terrestrial and aquatic life.
In Table 4, the measured average results of heavy metals in the sludge
wastewater of treatment in Tabriz with Environmental Protection Agency standards for use in agriculture were compared with the standards of other countries.
This causes rapid sludge
development in the engine, leading to severe engine damage.
SVI for both neutral and alkaline medium sludge
was 39 and 40 respectively.
Workers at the facility design, develop, test and train for sludge
retrieval, mastering the retrieval tools, processes and techniques for sludge
retrieval in a safe, radiologically clean environment.
Anaerobically digested sewage sludge
, obtained from the wastewater treatment plant of the Municipality of Ankara,was added to the plough layer (0-25 cm) of the experimental site in July 2004 at rates of 0 (Control), 4, 8, and 12 t da-1 dry weight and no sewage sludge
application was made after this date.
The present study was undertaken to discover any possible effect of iron addition on the anaerobic digestion of the primary-waste activated sludge
mixture and phosphorus release during the digestion of the sludge
In the present research, effects of some natural polymers on sludge
dewatering by a vacuum filter has been studied and then their efficiency is compared with those of chemical coagulants.
But as sludge
has spread across the country, so have concerns that it may cause as many environmental problems as it solves.
Yet Severn Trent has defended the sludge
sales, which are backed by the Government.