MAINTENANCE OF LINES & EQUIPMENT
Our facilities are extensive, with most components over sixty years old. This fact requires our ongoing focus on repair and maintenance, and preventive maintenance. We are quite proud of our performance in maintaining our facilities.
We are continuously working on improving our collection system, where our principal focus is infiltration and inflow abatement. This effort is our most critical undertaking at this time, and it is taken very seriously.
The same thing is true at the treatment plant, where minor repairs are tackled by the in-house staff on a continuous basis. Larger more complicated repairs or replacements of equipment are done by outside specialized contractors.
AVMA completed the planning, design and construction of a major treatment plant upgrade, to better enable us to handle periodic high flows created by rainfall.
The AVMA has closed curcuit televising equipment that enables the operators to go inside the sewer lines and identify Infiltration sources and defects that require repairs.
WASTEWATER PROCESS & TREATMENT
Our wastewater treatment plant is intended to remove pollutants from the wastewater before it is discharged into the receiving stream, the Antietam Creek. It employs a three-phase process, designated as primary treatment, secondary treatment and tertiary treatment. All of these steps are conventional and are approved and permitted by the Department of Environmental Protection.
Primary treatment includes screening out solids from the wastewater, grit removal and initial settling of the wastewater.
Secondary treatment picks up after the initial settling process and is achieved through biological treatment using aeration of the wastewater. Aeration is achieved by pumping compressed air into the aeration tanks, naturally occurring bacteria use the oxygen and consume the organic matter in the wastewater as food. Through this process the majority of organic pollutants are removed. The process is called the activated sludge process.
Completing the treatment in the tertiary step additional aeration is used to remove ammonia-nitrogen then final settling occurs where the solids are separated from the clear water which is then disinfected and the treated water is discharged to the creek.
The solids that are removed from the system are digested in tanks called aerobic digesters until it is stabilized and the volatile organics are reduced to acceptable levels. This material called biosolids is then dewatered on a belt filter press and put into dumpster containers to be properly disposed of in a landfill.