The WEF Sustainable Utilities Task Force presents a resource for utility managers seeking examples of succesful sustainability practices

GOING, GOING, GONE – KNOWLEDGE CAPTURE AT DC WASA

District of Columbia Water and Sewer Authority
Washington, District of Columbia

The District of Columbia Water and Sewer Authority (WASA), like many utilities, had updated its
strategic plan in 2005 to include the development and implementation of succession plans for key
positions. Succession planning is integral to maintaining its high levels of service. However, some
of its key employees would not necessarily be around to participate in a traditional succession
planning process. After attending a seminar sponsored by the Virginia Water Environment
Association’s Utility Management Committee on the Succession Planning for a Vital Workforce in
the Information Age study that the Awwa Research Foundation and the Water Environment
Federation jointly funded, WASA found the tool it needed to address its short-term needs –
Knowledge Capture.
Utility managers have been exposed to many management theories for improving their
organizations. Some of those ideas are more easily implemented than others. Knowledge
management is one of those concepts that are sound, but whose implementation in the water and
wastewater industry is still a work in progress on a large-scale basis. In 2005, the average age of
WASA employees was 46 years old, with an average length of service with of 14 years. During the
preceding decade, WASA had undergone significant changes with respect to leadership, work rules,
processes and, as expected, experienced an exodus of employees with technical and tacit knowledge
of key processes. During the preceding five years, the average age at retirement had been declining.
The average at retirement had dropped to 56 years of age. It is increasingly more time consuming
for utilities to recruit and hire replacements for vacant positions and the best pool of potential
candidates often work underneath key employees.
Although WASA was familiar with the manner in which the Frederick County Sanitation
Authority’s (FCSA) knowledge capture process was conducted, it had adapted the knowledge
capture methodology to fit its needs, rather than go through the process in the exact same way
that FCSA had conducted it. As the first step in developing its succession planning process,
WASA initiated a Replacement Planning Program that used knowledge capture as its primary
tool for:
• Detailed review of select organizational units
• Analyze key processes to identify tacit operational knowledge
• Identify competencies required to successfully execute high risk processes
• Provide recommendations to improve processes that are consistent with best practices
• Assist in identifying internal candidates who could potentially fill vacancies


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Posted: May 3rd, 2011 | Filed under: >1M, Waste Water Treatment | Tags: , , , , | 1 Comment »

Coping with Digester Foaming in an Age of Increasing Incidence


Digester foaming is poorly understood. An increasing number of wastewater utilities are experiencing significant disruption of both liquid stream treatment and solids processing operations as a result of foaming episodes and, in some cases, costly structural damage to their digesters. A review of the literature indicates that we should anticipate increased foaming problems in the future as the use of biological nutrient removal (BNR) and membrane (MBR) processes become more prevalent, and as utilities operate at lower DO concentrations to contain operating costs and reduce their carbon footprint. This paper reviews research findings and actual operating experience related to digester foaming and describes foam formation and its behavior inside the digester. Measures to reduce the impacts of digester foaming such as changes in digester operational practices and facility and equipment modifications that can make a digestion complex more “foam tolerant” are reviewed, along with the prospects for their success based on observations at operating plants. Merely optimizing operational practices may not be sufficient in all cases, and some wastewater utilities have opted to make major process changes in an effort to reduce digester foaming. Early operating experience with two phase digestion, in particular, has shown considerable promise at several treatment plants with long histories of foaming in conventional digestion systems. Short of undertaking major capital improvements to effect process changes, there are more modest steps that can be taken to reduce the potential for facility damage and disruption from digester foaming. Source: WEFTEC 2009 Proceedings


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Posted: August 27th, 2010 | Filed under: Waste Water Treatment | Tags: , | No Comments »