Milwaukee Metropolitan Sewerage District Research Articles

Lessons Learned from Milwaukee Metropolitan Sewerage District’s Flow Evaluations of the Private Property Infiltration/Inflow Reduction Program

Lessons Learned from Milwaukee Metropolitan Sewerage District’s Flow Evaluations of the Private Property Infiltration/Inflow Reduction Program

Energy Management at Milwaukee Metropolitan Sewerage District

Energy Management at Milwaukee Metropolitan Sewerage District

PCBs, Playgrounds, and Parks: Lessons Learned from MMSD's Collection System Legacy Pollutant Problem

PCBs, Playgrounds, and Parks: Lessons Learned from MMSD's Collection System Legacy Pollutant ProblemIn June 2007, as part of routine sewer cleaning, legacy polychlorinated biphenyls were unknowingly disturbed, resulting in contaminated biosolids at Milwaukee Metropolitan Sewerage District's (MMSD) treatment facilities. MMSD heat dries biosolids, producing Milorganite®, which is typically sold both to retail and professional markets. Heat dried biosolids that did not meet Milorganite®...Author(s)Michael MartinJeff SpencePaul SchlechtPeter TopczewskiSourceProceedings of the Water Environment FederationSubjectSession 92 - Effective Rehabilitation and Emergency ResponseDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2009ISSN1938-6478SICI1938-6478(20090101)2009:9L.6292;1-DOI10.2175/193864709793957265Volume / Issue2009 / 9Content sourceWEFTECFirst / last page(s)6292 - 6300Copyright2009Word count102Subject keywordsPolychlorinated biphenyls (PCBs)legacy pollutantssewer cleaningheat dried biosolidsToxic Substances Control Act (TSCA)

SSO Minimization at the Milwaukee Metropolitan Sewerage District

SSO Minimization at the Milwaukee Metropolitan Sewerage District

AIMS: Asset Management Application for a Large Municipal Wastewater Agency

AIMS: Asset Management Application for a Large Municipal Wastewater AgencyThe Milwaukee Metropolitan Sewerage District (MMSD) realizes that a Capacity assurance, Management, Operation and Maintenance (CMOM) Program is good business practice for decisions on all of itsassets. MMSD further recognizes that any gains from a comprehensive CMOM program require a solid Asset Management (AM) Program to sustain the CMOM program. In 2002, the MMSD formally initiated aCMOM...Author(s)Debra JensenAndy LukasKen HarlowSam PaskeSourceProceedings of the Water Environment FederationSubjectSession 11: Planning for Tomorrow – Managing Your Infrastructure to Optimize Life Cycle CostsDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2006ISSN1938-6478SICI1938-6478(20060101)2006:4L.723;1-DOI10.2175/193864706783796240Volume / Issue2006 / 4Content sourceCollection Systems ConferenceFirst / last page(s)723 - 739Copyright2006Word count573

A Tale of Two Tunnels

A Tale of Two TunnelsIn late 2005, the Milwaukee Metropolitan Sewerage District (MMSD) began operation of the Northwest Side Relief Sewer. This is a 20 foot diameter bored tunnel, 38,000 feet long, and was designed to provide hydraulic grade line relief to upstream sewers and to provide storage for excess sanitary sewage flows to benefit the entire service area.MMSD has been operating a 405 million gallon capacity...Author(s)Edward SpeerLaura KlettiSteve HeinzDan LauSourceProceedings of the Water Environment FederationSubjectSession 5: Tunnels and Treatment – Unique Approaches to Store and Treat CSOsDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2006ISSN1938-6478SICI1938-6478(20060101)2006:4L.251;1-DOI10.2175/193864706783796015Volume / Issue2006 / 4Content sourceCollection Systems ConferenceFirst / last page(s)251 - 260Copyright2006Word count153

Water Quality Planning in the Greater Milwaukee Watersheds: A Collaborative Watershed Approach

Water Quality Planning in the Greater Milwaukee Watersheds: A Collaborative Watershed ApproachThe Wisconsin Department of Natural Resources (DNR), the Southeastern Wisconsin Regional Planning Commission (SEWRPC) and the Milwaukee Metropolitan Sewerage District (MMSD) formally agreed to cooperate in watershed-based water quality planning. The agreement is a commitment to jointly develop data, models, analysis techniques, stakeholder support, objectives and, ultimately, recommendations. The...Author(s)Timothy R. BateNancy U. SchultzPatrick T. MarcheseSourceProceedings of the Water Environment FederationSubjectSession 6: Watershed Approach to Comprehensive PlanningDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2004ISSN1938-6478SICI1938-6478(20040101)2004:5L.475;1-DOI10.2175/193864704784107362Volume / Issue2004 / 5Content sourceCollection Systems ConferenceFirst / last page(s)475 - 490Copyright2004Word count142

THE NORTHWEST SIDE RELIEF SEWER TUNNEL CREATIVELY SOLVES PROBLEMS IN MILWAUKEE'S WASTEWATER COLLECTION SYSTEMS

THE NORTHWEST SIDE RELIEF SEWER TUNNEL CREATIVELY SOLVES PROBLEMS IN MILWAUKEE'S WASTEWATER COLLECTION SYSTEMSThe Milwaukee Metropolitan Sewerage District's (MMSD) 2010 Facilities Plan growth and flow projections indicated that portions of the existing metropolitan interceptor system (MIS) would be approximately 60 percent below the required wet weather peak capacity. Hydraulic modeling demonstrated that the MIS on the city's northwest side would surcharge when projected 2010 flows were applied, resulting...Author(s)Faruk OksuzRoger MaurerPatrick MarcheseSourceProceedings of the Water Environment FederationSubjectSession 8: Evolution of Deep TunnelsDocument typeConference PaperPublisherWater Environment FederationPrint publication date Jan, 2004ISSN1938-6478SICI1938-6478(20040101)2004:5L.585;1-DOI10.2175/193864704784107236Volume / Issue2004 / 5Content sourceCollection Systems ConferenceFirst / last page(s)585 - 604Copyright2004Word count255

Dollar Spot Severity, Tissue Nitrogen, and Soil Microbial Activity in Bentgrass as Influenced by Nitrogen Source

There is increasing interest in the use of bio‐organic nitrogen (N) sources to suppress turfgrass diseases. The objectives of this field study were to evaluate nine N‐sources for their effects on dollar spot (caused by Sclerotinia homoeocarpa F. T. Bennett) severity; to elucidate the relationship among N‐sources, tissue N, soil microbial activity, and the severity of dollar spot; and to evaluate N‐source effects on thatch and soil organic matter levels, and plant parasitic nematodes. Nitrogen sources included urea, sulfur‐coated urea (SCU), Milorganite (Milwaukee Metropolitan Sewerage District, Milwaukee, WI), Sustane Medium (Sustane Corporation, Chaska, MN), Earthgro 1881 Select (Earthgro Inc., Lebanon, CT), Earthgro Dehydrated Manure, Ringer Lawn Restore (Ringer LR, Ringer Corporation, Minneapolis, MN), Com‐Pro (Blue Plains Sanitation Commission, Silver Spring, MD), and Scotts All Natural Turf Builder (Scotts ANTB, Scotts Company, Marysville, OH). The N was applied annually at a rate of 200 kg N ha−1 yr−1 between 1994 and 2000 to a stand of fairway height ‘Southshore’ creeping bentgrass (Agrostis stolonifera L.). Data were collected between 1998 and 2000. Ringer Lawn Restore (all 3 yr) and urea (1999 and 2000) delayed dollar spot to within an acceptable threshold from May to early or mid‐June, when disease pressure was low to moderately severe. Com‐Pro (all 3 yr), however, enhanced dollar spot. No N‐source reduced dollar spot when data were averaged over‐the‐season. No N‐source was consistently associated with higher levels of soil microbial activity. There was a weak negative correlation between soil microbial activity and dollar spot on one date in 2000, when disease pressure was low. When disease pressure was moderately severe, there was a strong negative correlation between the amount of foliar N and dollar spot severity in June 1999, but no correlation was found in 2000. Only Sustane Medium‐treated plots had higher organic matter levels in the upper 2.5 cm of soil on all rating dates, but there was no increase in soil organic matter in the 2.6 to 5.0 cm soil zone with any N‐source.

Water quality before and after deep tunnel operation in milwaukee, wisconsin

The mitigative effects of the deep tunnel for temporary storage of storm water and sewage, on the water quality of the Milwaukee, Menomonee, and Kinnickinnic Rivers are investigated. The analysis is based on data from the Milwaukee Metropolitan Sewerage District's overflow and surface-water quality monitoring program. Statistical analysis of water quality parameters (BOD, phosphorus, suspended solid, fecal coliform counts, zinc, and chloride) in the three rivers indicates that Menomonee River benefits the most from the deep tunnel. Fecal coliform counts inside the CSO area, and to a certain extent BOD and zinc levels, exhibit the most significant decline after 1994 when the tunnel came on line. These conclusions are based on t-test comparisons of regional averages incorporating spatial and temporal correlations from 1991 to 1993 and 1994 to 1997. The results from t-tests are complemented and confirmed with results from Mann–Kendall tests for trend. Suspended solids and chloride do not decrease after 1994.

Recursive System Identification for Real-Time Sewer Flow Forecasting

On-line sewer flow forecasting is simulated in this study using an autoregressive transfer function rainfall-runoff model and a recursive procedure for parameter estimation. Reliable off-line estimates of the model parameters are assumed to be unavailable. Three recursive estimation algorithms are used: the time-invariant and time-varying versions of the recursive least-squares algorithm, and the Kalman filter interpretation of this algorithm. The sensitivity of the forecasting accuracy to the model order and to the initial conditions of the algorithm is studied using sewer flow data from the Milwaukee Metropolitan Sewerage District. It is observed that increasing the number of model parameters does not automatically improve the on-line forecasting results, although it does improve the off-line results. Also, the asymptotic properties of the recursive estimates appear to be better for the low-order models. It is observed that using the off-line identification results as the initial conditions for the recu...

Water Quality in Milwaukee, Wisconsin, versus Intake Crib Location

The pollution plume outside Milwaukee Harbor, Wis., is investigated based on data for ammonia, chloride, and turbidity collected by the Milwaukee Metropolitan Sewerage District (MMSD) through the period 1983–94. Results of stepwise multiple regression show that the turbidity at station OH-13,B close to the Howard intake crib is strongly correlated to the turbidity at station OH-02,M in the outfall area of the Jones Island Wastewater Treatment Plant. For chloride the correlation is also significant, and for ammonia it is insignificant at OH-13,B but measurable at station NS-07,B close to the Linnwood intake. Kriging interplation is used to obtain pollution estimates at unsampled locations during average spring conditions and during two episodic spring runoff events in 1985 and 1987 for which conditions may have been similar to those during the 1993 chryptosporidiosis outbreak. The results show that improved water quality can be obtained by extending the present Howard intake pipe up to 4.64 km and/or relocating the intake pipe about 2 km south of the present location at a larger bearing (N 71° E) relative to the north-south direction.

Experience with Ceramic Plate Diffusers in Large Activated Sludge Plants

Fine pore aeration systems were evaluated in a U.S.EPA sponsored study of oxygen transfer efficiency in 26 activated sludge plants. Two plants in the study, those of the Milwaukee Metropolitan Sewerage District, had aeration systems composed of flat plates grouted into containers placed flush with the basin floor. The remaining plants in the study had aeration systems utilizing various disk, dome, and tube devices that are now in far more widespread use than the flat plates. The District's aeration basins gave better oxygen transfer efficiency than the other ceramic diffuser systems studied. The difference may have been the result of the high tank area to diffuser area ratio and the low air flux rates associated with the plate systems. At one MMSD plant there were also four basins with recently installed ceramic disk diffuser systems. This provided an opportunity for side-by-side comparisons between the disks and the flat plates in containers. An analysis of diffuser system first costs and energy costs indicated that the ceramic plate system could be cost effective at higher power costs, but not at the prices presently paid by the District for power.

Planning and Performing Surveys on Megaproject

The Milwaukee Metropolitan Sewerage District started the Milwaukee Water Pollution Abatement Program in the summer of 1977. The program is in its tenth year with completion scheduled for 1992. Technical memorandums were developed for the Milwaukee program as guidelines for the various disciplines providing services. Two such technical memorandums for surveying and mapping work were developed and adopted by the Milwaukee Metropolitan Sewerage District in 1978. Technical Memorandum 5/1-2, \ISurvey and Mapping Guidelines,\N is an administrative guide for managing surveying and mapping activities. Technical Memorandum 5/2-12, \ITechnical Instructions for Surveying and Mapping,\N is a guide for those performing surveying and mapping work. Key elements of the guidelines used in performing the surveys for the program are presented.