Wastewater sludge dewatering with the use of «Sibfloc^®» flocculant and special wells

Summary

The technology of high-efficient wastewater sludge dewatering on sludge beds with the use of brand new «Sibfloc^®» flocculant made on the basis of polyethylene oxide and special slotted wells for the collection and removal of sludge water is described. The technology has been tested under various climatic conditions – from the Krasnoyarsk Area to the Krasnodar Area and introduced at the wastewater treatment facilities in Russia and Kazakhstan. The suggested technology when used on sludge beds provides for wastewater sludge dewatering to 68–75% moisture content; under the effect of «Sibfloc^®» flocculant the sludge is structurized and readily dried to 40–45% moisture content after unloading from the sludge bed. The sludge generated during dewatering is suitable for any type of utilization – from direct use as soil conditioner for reclamation of dumps and solid waste landfills to processing into fertilizers and soil for forest plantation. Sludge not suitable for any utilization because of fast drying capability to any moisture content (from 60 to 8%) can be efficiently used in biogas generating plants or special furnaces either in its initial state or in the form of fuel bricks. Technical and economic performance and environmental effect of using the considered technology allow classifying it as a best available technology. Introducing the technology of wastewater sludge dewatering with the use of «Sibfloc^®» flocculant provides for 4–7 times reduction of the required number of sludge beds, and improvement of sanitary and environmental situation at the treatment facilities and adjacent territories, including efficient odor control and unloading filled up sludge beds and sludge tanks.

Key words

dehydration , flocculant , wastewater sludges , treatment facilities , sludge bed , slotted well , reclamation

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REFERENCES

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