Wastewater Lagoon Operations
Nitrification of A lagoon Effluent Using Fixed Film Media
Pilot Study Results
By Wes Ripple, NHDES
For many years
it has been debated as to whether aerated lagoons are capable of achieving
biological nitrification as currently designed. Several studies undertaken in
New Hampshire in recent years have determined that lagoons can and do nitrify to
significant degrees, often achieving < 1.0 mg/l ammonia nitrogen in the
effluent. This article presents an overview and the conclusions of those
Microbiological and Chemical Testing for Troubleshooting
By Michael Richard, Ph.D. of the The Sear-Brown Group
This paper presents a biology and chemistry based approach to troubleshooting
lagoon systems that has proven successful in correcting lagoon treatment
problems throughout the country. The information to collect and their
interpretation is presented.
Nutrients in Lagoons
This presentation was made by Jim Fitch of Woodard
and Curran at the 25th Annual Convention of the Maine Rural Water Association
Conference in Freeport, Maine on December 1, 2005. It is entitles "Issues Facing
Lagoon Systems and Nutrient Removal.
Jim Fitch was educated at the
University of Maine at the Orono, Maine Campus. He received a Bachelors and
Master degree in environmental engineering. Fitch is a registered Professional
Engineer working in the New England area for 27 years. He specializes in
management of municipal wastewaters. Familiar with all types of treatment, he
has a deep knowledge and appreciation of the intricacies and complexities of
lagoon treatment, thorough knowledge of nutrient removal systems, and is active
on a number of task forces to develop regulations in Maine and New Hampshire.
A coming problem in the Rocky Mountain region is
the requirement for ammonia removal during municipal wastewater
treatment. Many small communities in the Rocky Mountain region that se
aerated lagoons are getting effluent ammonia limits in their renewed
Phosphorus (P) occurs in natural waters
and in wastewaters almost solely as phosphates. These phosphates include organic
phosphate, polyphosphate (particulate P) and orthophosphate
(inorganic P). Orthophosphates are readily utilized by aquatic organisms.
about cold temperature nitrification usually arise when water temperature
in the biological treatment system drop 5 degrees Celsius or below. At this
temperature the nitrifying bacteria responsible for oxidizing ammonia
tend to go dormant. If this happens, it usually means effluent violations for
those plants with ammonia limits.
Nitrification consumes large amounts of
oxygen. For every lb of BOD oxidized, 1 lb of O2 is used. For every lb of
ammonia oxidized, 4.6 lb of O2 are used. In order for uninhibited
nitrification to occur, a working DO level is 2.0 mg/l is suggested.
Lagoon Systems Can Provide Low Cost Wastewater Treatment Systems
by the National Small Flows Clearing House 1997 Volume 8