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

1995 ◽  
Vol 32 (9-10) ◽  
pp. 75-84 ◽  
Author(s):  
A. D. Andreadakis ◽  
G. H. Kristensen ◽  
A. Papadopoulos ◽  
C. Oikonomopoulos
Keyword(s):  
Biological Treatment ◽  
Treatment Plant ◽  
Cost Effective ◽  
Primary Treatment ◽  
Effective Control ◽  
Two Stage ◽  
Effluent Quality ◽  
Filamentous Microorganisms ◽  
Sludge Settling ◽  
The City

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.

Advanced primary treatment: An alternative to biological secondary treatment. The city of Los Angeles hyperion treatment plant experience

1996 ◽  
Vol 34 (3-4) ◽  
pp. 223-233 ◽  
Author(s):  
Y. J. Shao ◽  
Anmin Liu ◽  
Wada Frank ◽  
John Crosse ◽  
David Jenkins
Keyword(s):  
Los Angeles ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Cost Effective ◽  
Primary Treatment ◽  
Secondary Treatment ◽  
Anionic Polymer ◽  
Coagulation And Flocculation ◽  
The Usa ◽  
The City

Advanced primary treatment (APT) is a process, in which chemicals are added to raw sewage to enhance total suspended solids (TSS) and biochemical oxygen demand (BOD5) removals by coagulation and flocculation. The City of Los Angeles Hyperion Treatment Plant (HTP) is the largest APT plant in the USA, servicing over 4 million people within an area of 1500 km2 and currently treating an average of 15 m3/s (350 MGD). HTP began using APT in 1986; current chemical doses to the raw sewage are 10 mg/l of FeCl3 and 0.15 mg/l of an extremely high molecular weight anionic polymer. The 1992 annual average influent TSS and BOD5 concentrations were both 330 mg/l and the APT removed an average 83% TSS and 51% BOD5 at an average surface overflow rate of 75 m/day (1900 gals/ft2,day). This paper discusses the overall performance of APT. The process is more cost effective than conventional primary treatment and its use can significantly reduce the size of the following secondary treatment process. APT is especially suitable for developing countries because of its low capital and operating costs.

Characterization and treatment of effluent from opium alkaloid processing wastewater

1999 ◽  
Vol 40 (1) ◽  
pp. 23-30 ◽  
Author(s):  
M. F. Sevimli ◽  
A. F. Aydın ◽  
H. Z. Sarikaya ◽  
İ Öztürk
Keyword(s):  
Biological Treatment ◽  
Treatment Plant ◽  
Cost Effective ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Aerobic Treatment ◽  
Two Stage ◽  
The Government ◽  
Anaerobic Sludge Blanket ◽  
Opium Alkaloid

Opium is a traditional produce of Turkey planted and harvested under the control of the Government. This study was undertaken to characterize the wastewater from opium alkaloid processing. Thus, the laboratory records of the two stage aerobic biological treatment plant of the Opium Alkaloid factory were evaluated. Following the statistical analysis of the results for the last three years, it was found that the median values of influent COD and BOD5 concentrations were 29,300 mg/l and 15,000 mg/l respectively. Two stage aerobic biological treatment could reduce these values down to 1,132 mg/l and 100 mg/l. Specific wastewater generation was 6.7 m3 per ton of the opium capsule processed. Experiments conducted at an upflow anaerobic sludge blanket reactor type pilot plant have demonstrated that 70 percent of the incoming COD can be removed anaerobically, and can be considered as a cost effective substitute for the 1st stage of the aerobic treatment. Post treatment of the effluents of the existing two stage aerobic treatment with ozone resulted in significant color removal and COD reduction.

Utilization of activated sludge plants for enhanced treatment of combined sewage

2008 ◽  
Vol 58 (8) ◽  
pp. 1569-1574
Author(s):  
B. Nikolavcic ◽  
K. Svardal ◽  
G. Wandl ◽  
N. Günther ◽  
G. Spatzierer
Keyword(s):  
Particulate Matter ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Primary Treatment ◽  
Full Scale ◽  
Storm Water ◽  
Effluent Quality ◽  
High Extent ◽  
Water Conditions

A process is introduced which utilizes secondary clarifiers for the treatment of combined sewage. Under storm water conditions, surplus sewage bypasses the aeration tanks after primary treatment and is directly introduced into the secondary clarifiers. The hydraulic capacity of existing activated sludge plants can be increased without additional tank volume. Particulate matter as well as dissolved compounds are removed to a high extent. Investigations on a full scale treatment plant (100,000 p.e.) show that the effluent quality is comparable with full biological treatment, even if the hydraulic loading is increased by 50%.

Stages of launching a biological treatment plant at the wastewater treatment facilities with dosing easily oxidable organic matter

2021 ◽  
pp. 38-46
Author(s):  
В.А. Кондрашев ◽  
С.Г. Метелица
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Commercial Fishing ◽  
Effluent Quality ◽  
Start Up ◽  
Numerous Experimental Data ◽  
Treatment Facilities ◽  
Equipment Configuration

Рассмотрены вопросы, связанные с проведением пусконаладочных работ биоблока станции очистки хозяйственно-бытовых и близких к ним по составу сточных вод при пробном пуске в эксплуатацию очистных сооружений. Подробно рассмотрены этапы пусконаладочных работ биоблока очистных сооружений с «затравкой» активным илом из действующих биологических очистных сооружений и с дозировкой легкоокисляемой органики. Описан состав оборудования станции КОС-9 производства «Гермес Групп». Рассмотрены все этапы пусконаладочных работ биоблока на примере запуска очистных сооружений КОС-9 с привлечением многочисленных опытных данных. Определены периоды этапов пусконаладки биоблока. Приведены проблемы наладки биоблока и пути их решения с достижением требуемого результата. Технология, используемая на станции, обеспечивает очистку сточных вод, соответствующую требованиям, предъявляемым к выпуску очищенных стоков в водоем рыбохозяйственного значения. Issues related to commissioning a biological treatment plant at the facilities for household and similar in composition wastewater treatment during the trial start of the treatment facilities are considered. The stages of commissioning a biological treatment plant at the wastewater treatment facilities with «inoculating» activated sludge from the operating biological treatment facilities and with dosing easily oxidable organic matter are considered in detail. The equipment configuration of the WWTP-9 produced by Germes Group is described. All stages of the biological treatment plant commissioning are considered through the example of the start-up of WWTP-9 with the use of numerous experimental data. The periods of biological treatment plant commissioning stages have been determined. The problems of adjusting the biological treatment plant and the ways of their elimination to achieve the required result are presented. The technology used at the WWT facilities provides for the effluent quality that meets the requirements for the discharge into a water body of commercial fishing importance.

Innovative biological treatment for sustainable development in the chemical industries

1998 ◽  
Vol 38 (4-5) ◽  
pp. 111-120 ◽  
Author(s):  
W. Wesley Eckenfelder ◽  
A. J. Englande
Keyword(s):  
Sustainable Development ◽  
Biological Treatment ◽  
Ecological Integrity ◽  
Cost Effective ◽  
Wastewater Management ◽  
Effluent Quality ◽  
Treatment Techniques ◽  
Conventional Technology ◽  
Receiving Waters ◽  
Specific Oxygen Uptake Rate

This paper presents a perspective of wastewater management in the chemical industries as related to sustainable development. The scope of wastewater management must therefore further be expanded to include the concept of ecological integrity of receiving waters. Ecological integrity of receiving waters is compromised by contaminants which are not effectively removed by Best Conventional Technology (BCT). Biological treatment typically offers the most cost-effective conversion and/or stabilization of wastewaters; however, modifications must be employed in the design and operation to provide satisfactory effluent quality. Enhanced treatment techniques for wastewaters containing high organic concentrations, VOCs, elevated TDS levels, toxics and priority pollutants are discussed. The importance of design and operational procedures including pretreatment technologies, two stage vs. single stage activated sludge, selector design and maximum specific oxygen uptake rate determinations are also presented.

Implementation of EU discharge guidelines at IVAR's Regional Wastewater Treatment Plant of North Jaeren, Stavanger, Norway

2001 ◽  
Vol 44 (1) ◽  
pp. 33-39 ◽  
Author(s):  
O. Tornes
Keyword(s):  
Wastewater Treatment ◽  
Feasibility Study ◽  
Chemical Treatment ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Primary Treatment ◽  
Full Scale ◽  
Precipitation Process ◽  
European Economic Area ◽  
The Eu

Norway is a leading country on wastewater treatment comprising chemical precipitation processes. This is because Norwegian effluent standards to the North Sea have traditionally focused on phosphorus removal. In most cases, chemical treatment therefore has been considered to give lower investment and operating costs than biological treatment. Norwegian wastewater policy and management is based on the EU guidelines resulting from the EEA (European Economic Area) Agreement. According to the 1991 Urban Wastewater Treatment Directive, this will in most cases require secondary treatment. However, primary treatment can be accepted for plants larger than 10,000 PT with effluents to less sensitive coastal areas, if no negative environmental impacts can be proved. The main objective of the Regional Water, Sewerage and Waste Company (IVAR) is to comply with the prevailing effluent limits at lowest possible cost. During the past four years, IVAR has therefore undertaken comprehensive optimising of the precipitation process including full-scale experiments with different coagulant dosing control systems and different types of coagulants. IVAR also accomplished a feasibility study of introducing biological treatment as an alternative to chemical treatment. Under the prevailing frame conditions of discharge requirements and sludge deposit costs, it is not economically feasible to change to organic coagulants or biological treatment. This conclusion might have to be altered later resulting from the implementation of new EU regulations and increasing sludge deposit costs. This paper presents results from full-scale experiments, extracts from the feasibility study and a comparison of costs. Furthermore, the practical consequences of implementing the EU-guidelines are discussed.

Improvement of Sludge Settleability in Activated Sludge Plants Treating Effluent from Pulp and Paper Industries

1999 ◽  
Vol 40 (11-12) ◽  
pp. 215-221 ◽  
Author(s):  
Kjær Andreasen ◽  
Jeanette Agertved ◽  
Jens-Ove Petersen ◽  
Henrik Skaarup
Keyword(s):  
Activated Sludge ◽  
Paper Industry ◽  
Treatment Plant ◽  
Pulp And Paper ◽  
Detailed Knowledge ◽  
Effluent Quality ◽  
Pulp Industry ◽  
Substrate Removal ◽  
Filamentous Microorganisms ◽  
Pulp And Paper Industries

The main objective of many activated sludge plants treating wastewater from the pulp and paper industry is to remove COD only. These plants are often designed as high-load aerobic systems without any microbial selector system. As a consequence the sludge settling properties are normally poor due to fast growing filamentous microorganisms, which severely reduce the treatment capacity and the effluent quality. Implementation of selectors, in which the substrate concentration and the metabolic pathways can be manipulated, has in many cases reduced the bulking sludge problems in activated sludge systems. An example of a successful upgrading of a Danish pulp industry wastewater treatment plant with an anoxic selector is presented. the use of a novel technique to investigate the in situ physiology of filamentous microorganisms is discussed. It is concluded that a successful application of selectors relies on detailed knowledge about: a) physiology and substrate requirement of the filamentous microorganisms, b) wastewater composition and c) substrate removal kinetics in the selector system.

Liquid stream secondary treatment process design at the Annacis Island wastewater treatment plant of the Greater Vancouver sewerage and drainage district

1998 ◽  
Vol 38 (3) ◽  
pp. 51-60
Author(s):  
L. A. Slezak ◽  
M. K. Fries ◽  
L. R. Pickard ◽  
R. A. Palsenbarg
Keyword(s):  
Process Design ◽  
Biological Treatment ◽  
Treatment Process ◽  
Treatment Plant ◽  
Primary Treatment ◽  
Secondary Treatment ◽  
Liquid Stream ◽  
Process Improvements ◽  
Major Project ◽  
Design Construction

The Greater Vancouver Sewerage & Drainage District (GVS&DD) is a major regional wastewater agency serving Vancouver, British Columbia and surrounding municipalities. In the late 1980's it was mandated to upgrade its largest treatment plant from primary treatment to secondary treatment. From 1990 until the present the GVS&DD has engaged in Predesign, Design, Construction and Commissioning of the Annacis Island WWTP Secondary Upgrade. The size of the facility and the fact that no secondary treatment components were previously in place combined to make the upgrade a very large project valued at nearly $470 million CDN. This paper describes the major project components of the liquid stream process improvements. In addition to the major biological treatment components, other aspects of the project are described including, odour management, influent pumping, and primary treatment upgrades.

CONDITION OF PRIMARY PRODUCERS COMMUNITIES IN THE AREA OF THE CITY OF UFA WASTEWATER BIOLOGICAL TREATMENT PLANTS’ DISCHARGE

2012 ◽  
Vol 2 (3) ◽  
pp. 59-64
Author(s):  
E. S KAREVA ◽  
G. A GULAMANOVA
Keyword(s):  
Biological Treatment ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Organic Pollution ◽  
Ecological Condition ◽  
Ecosystem Structure ◽  
Sewage Treatment Plants ◽  
Quantitative Characteristics ◽  
The City ◽  
Wastewater Biological Treatment

Prediction and assessment of ecological condition of watercourse receiving wastewater can be made with the use of a variety of methods including hydrobiological and some others.The article describes the study of wastewater effects on the degree of phytoplankton growing in the area within 500m up and down the Belaya River from the city wastewater treatment plant and Demsk sewage treatment plants of Ufa. Basic structural and quantitative characteristics of autotrophic plankton are analyzed. The degree of organic pollution according to indicator groups is identified. The estimation of one of the basic components of aquatic ecosystem structure is given.

Nitrogen Control for the Partly Sewered Basin of Yodo River-Lake Biwa System

1982 ◽  
Vol 14 (1-2) ◽  
pp. 215-225
Author(s):  
S Iwai
Keyword(s):  
Treatment Process ◽  
Lake Biwa ◽  
Treatment Plant ◽  
Advanced Treatment ◽  
Secondary Treatment ◽  
Effluent Quality ◽  
New Process ◽  
Aeration Process ◽  
Slight Rise ◽  
The City

(a) New problems are proposed to the sources of water supplies in the downstream reaches of Yodo River, when sewage works up to the secondary treatment have been partly developed in Kyoto, the upstream area of the river. Also, (b) a new simulation process is exploited for the eutrophication of lake water. Upon applying the process to the Lake Biwa water, for which wastewater criteria were enforced even to legally control nutrients since 1979, a good fitness is recognized between observed data and computed results. The circumstances of the legal enactment of effluent quality standards of nitrogen etc by the Shiga Prefecture are introduced with the several concentration criteria, by way of example. Finally, (c) an advanced treatment process is required for the removal of nitrogen in organic wastewaters, in order to solve the problems proposed in (a) and to prevent the eutrophication stated in (b). A new process which was invented and named FDA(Facultative Denitro-Aeration) Process by the present author's group is explained and discussed. The result of application of this process to the nightsoil treatment plant at the City of Hikone is introduced, revealing that a potable effluent has been continuously obtained from the plant for the recent three years, with a slight rise in cost for construction, as well as for operation.

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