Two-stage chemical-biological treatment at Thessaloniki greater area WWTP - experiences and potentials

Andreadakis, AD; Kristensen, GH; Papadopoulos, A; Oikonomopoulos, C

dc.contributor.author	Andreadakis, AD	en
dc.contributor.author	Kristensen, GH	en
dc.contributor.author	Papadopoulos, A	en
dc.contributor.author	Oikonomopoulos, C	en
dc.date.accessioned	2014-03-01T02:41:08Z
dc.date.available	2014-03-01T02:41:08Z
dc.date.issued	1995	en
dc.identifier.issn	0273-1223	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30382
dc.subject	Activated sludge	en
dc.subject	Bulking	en
dc.subject	Chemical-biological treatment	en
dc.subject	Chlorine dioxide disinfection	en
dc.subject	Treatment plant start-up	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Water Resources	en
dc.subject.other	Activated sludge process	en
dc.subject.other	Biological water treatment	en
dc.subject.other	Chemicals removal (water treatment)	en
dc.subject.other	Chlorine compounds	en
dc.subject.other	Cost effectiveness	en
dc.subject.other	Discharge (fluid mechanics)	en
dc.subject.other	Disinfection	en
dc.subject.other	Microorganisms	en
dc.subject.other	Oxides	en
dc.subject.other	Plant startup	en
dc.subject.other	Water treatment plants	en
dc.subject.other	Bulking	en
dc.subject.other	Chemical biological treatment	en
dc.subject.other	Chlorine dioxide disinfection	en
dc.subject.other	Effluent quality	en
dc.subject.other	Influent flows	en
dc.subject.other	Thessaloniki gulf	en
dc.subject.other	Treatment plant startup	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	nitrogen	en
dc.subject.other	activated sludge	en
dc.subject.other	city	en
dc.subject.other	conference paper	en
dc.subject.other	disinfection	en
dc.subject.other	greece	en
dc.subject.other	sludge settling	en
dc.subject.other	waste water treatment plant	en
dc.title	Two-stage chemical-biological treatment at Thessaloniki greater area WWTP - experiences and potentials	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/0273-1223(96)00078-9	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0273-1223(96)00078-9	en
heal.language	English	en
heal.publicationDate	1995	en
heal.abstract	The wastewater from the city of Thessaloniki is discharged without treatment to the nearby inner part of the Thessaloniki Gulf. The existing, since 1989, treatment plant offers only primary treatment and did not operate since the expected effluent quality is not suitable for safe disposal to the available recipients. Upgrading of the plant for advanced biological treatment, including seasonal nitrogen removal, is due from 1995. In the mean time, after minor modifications completed in February 1992, the existing plant was put into operation as a two-stage chemical-biological treatment plant for 40 000 m3 d-1, which corresponds to about 35% of the total sewage flow. The operational results obtained during the two years operation period are presented and evaluated. All sewage and sludge treatment units of the plant perform better than expected,with the exception of the poor sludge settling characteristics, due to severe and persistent bulking caused by excessive growth of filamentous microorganisms, particularly M.Parvicella. Effective control of the bulking problem could lead to more cost-effective operation and increased influent flows.The wastewater from the city of Thessaloniki is discharged without treatment to the nearby inner part of the Thessaloniki Gulf. The existing, since 1989, treatment plant offers only primary treatment and did not operate since the expected effluent quality is not suitable for safe disposal to the available recipients. Upgrading of the plant for advanced biological treatment, including seasonal nitrogen removal, is due from 1995. In the mean time, after minor modifications completed in February 1992, the existing plant was put into operation as a two-stage chemical-biological treatment plant for 40 000 m3 d-1, which corresponds to about 35% of the total sewage flow. The operational results obtained during the two years operation period are presented and evaluated. All sewage and sludge treatment units of the plant perform better than expected, with the exception of the poor sludge settling characteristics, due to severe and persistent bulking caused by excessive growth of filamentous microorganisms, particularly M.Parvicella. Effective control of the bulking problem could lead to more cost-effective operation and increased influent flows.	en
heal.publisher	Pergamon Press Inc, Tarrytown, NY, United States	en
heal.journalName	Water Science and Technology	en
dc.identifier.doi	10.1016/0273-1223(96)00078-9	en
dc.identifier.isi	ISI:A1995UC24000011	en
dc.identifier.volume	32	en
dc.identifier.issue	9-10	en
dc.identifier.spage	75	en
dc.identifier.epage	84	en