Nitrate Contamination in Silver Springs: Feasibility Study for Expansion of Silver Springs Regional Wastewater Collection System and Treatment Plant

Cultured bacteria addition is one of the technologies used for odor control and FOG (fat, oil, and grease) removal in wastewater collection systems. This study investigated the efficiency of bacterial addition on wastewater odor control by conducting a set of full scale trials in a 60,000 cubic meter per day system for a period of two years. The objectives of this study were: (i) to identify factors that could impact wastewater treatment plant (WWTP) operations due to the effect of bacterial addition in the collection system, (ii) to estimate/understand the level of those impacts, and (iii) to present some interesting findings from the completed case study. The plant operation data before and during the bacterial addition were reviewed. The application of the cultured bacteria presented in the study was found to have significant impacts on the operation of the WWTP in terms of influent biological oxygen demand (BOD) and total suspended solids (TSS) loading, primary settling, sludge production, energy use, dissolved sulfides concentration, and methane production.

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CASE HISTORY: OZONE/HYDROXYL ION MIST ODOR CONTROL SYSTEM UTILIZATION ON WASTEWATER COLLECTION SYSTEM AND TREATMENT PLANT ODORS

Proceedings of the Water Environment Federation ◽

10.2175/193864702785139944 ◽

2002 ◽

Vol 2002 (5) ◽

pp. 897-902

Author(s):

Mark Feltner ◽

Kelly Lamp-Jones ◽

Richard Roberts ◽

Gene Thompson ◽

John Wade

Keyword(s):

Control System ◽

Case History ◽

Treatment Plant ◽

Collection System ◽

Odor Control ◽

System Utilization ◽

Plant Odors ◽

Hydroxyl Ion ◽

Wastewater Collection

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SANITARY DISTRICT OF DECATUR WASTEWATER COLLECTION SYSTEM CELLULAR DIGITAL PACKET DATA (CDPD) FEASIBILITY STUDY AND IMPLEMENTATION

Proceedings of the Water Environment Federation ◽

10.2175/193864702784247251 ◽

2002 ◽

Vol 2002 (16) ◽

pp. 404-414

Author(s):

John Cowger ◽

Jim Bradshaw

Keyword(s):

Feasibility Study ◽

Collection System ◽

Packet Data ◽

Cellular Digital Packet Data ◽

Sanitary District ◽

Wastewater Collection

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Forecasting saltwater intrusion volume and sulfate content in a wastewater collection system. Case study: Barreiro/Moita WWTP, Portugal

Journal of Water and Climate Change ◽

10.2166/wcc.2021.375 ◽

2021 ◽

Author(s):

A. Figueiredo ◽

L. Amaral ◽

J. Pacheco

Keyword(s):

Salt Water ◽

High Tide ◽

Treatment Plant ◽

Strong Correlations ◽

Collection System ◽

Pumping Stations ◽

Forecast Models ◽

The Right ◽

Wastewater Collection

Abstract The presence of salt water from the Tagus Estuary has been identified in the influent at Barreiro/Moita Wastewater Treatment Plant (WWTP), Portugal. The intrusion occurs throughout damaged sections and direct vectors in the wastewater collection system, during high tide levels, changing the wastewater characteristics and impacting the WWTP process. This study designed models to quantify this problem, enabling more effective countermeasures within the right timing. The proposed models estimate the average volume of salt water and sulfate () load for each high tide period. The laboratory results show strong correlations between the influent electrical conductivity (EC) and percentage of salt water in WWTP inflow (0.9909), and between EC and concentration in WWTP influent (0.9797). The forecast models also show good correlation between the high tide levels with volume of salt water (0.9145) and load (0.9162) entering the system. Considering the total monthly inflow, the highest percentage of salt water registered in WWTP inflow was 3.6%. During high tide periods, critical situations have been assessed with up to 53.9% of salt water in the WWTP inflow, increasing energy consumption and costs in pumping stations.

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Some Recent Developments in Sewage Sludge Pumping

Water Science & Technology ◽

10.2166/wst.1988.0171 ◽

1988 ◽

Vol 20 (4-5) ◽

pp. 227-236

Author(s):

J. H. Lohmann ◽

W. F. Garber

Keyword(s):

Sewage Sludge ◽

Treatment Plant ◽

Rheological Characteristics ◽

Volatile Content ◽

Collection System ◽

Positive Displacement ◽

Low Viscosity ◽

Recent Developments ◽

Cylinder Piston ◽

Pumping Equipment

The pumping of sewage sludge solids is reviewed in terms of handling high and low viscosity materials with solids concentrations varying from about 4 % to perhaps 50 %. Knowledge of rheological characteristics including thixotropy is necessary in designing pumping systems with sludge solids percentages, volatile content, particle size, abrasives content and temperatures being variables which could change pump types found suitable from facility to facility. The characteristics of a sewage collection system is also important in determining pumping parameters needed in a treatment plant. Solids handling equipment from other industries have made significant contributions to sewage solids pumping in recent years. Included are moyno-type progressing cavity screw-centrifugal, recessed impeller rotation piston positive displacement, and two cylinder piston S-transfer positive displacement pumps. Pumping equipment used in the F.R.G. and in Southern California in the U.S.A. is remarkably similar. These types of pumps offer the possibility of designing optimum solids dewatering and transfer systems.

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