VIDEO. From Sewer Authority Mid-coastside Board meeting Monday, 12/14/2020.
General Manager Kishen Prathivadi and Dan Childs from Wastewater Management Specialists present.
SAM has violations in October and November, and probably December due to BOD imbalance.
The question is complicated, but the board was asking about Fertilizers? Frozen fisheries? Breweries? Distilleries? Wineries?
It is important that the BOD be stable so we don’t pollute the ocean and get fined.
So, let’s put our heads together and see what we can come up with.
You don’t often think that water bodies contain oxygen, but water does contain a small amount of dissolved oxygen. A small amount, but it is essential for life in the water. Biological oxygen demand (BOD) generally represents how much oxygen is needed to break down organic matter in water.
Biochemical oxygen demand (BOD) represents the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic (oxygen is present) conditions at a specified temperature.
When you look at water in a lake the one thing you don’t see is oxygen. In a way, we think that water is the opposite of air, but the common lake or stream does contain small amounts of oxygen, in the form of dissolved oxygen. Although the amount of dissolved oxygen is small, up to about ten molecules of oxygen per million of water, it is a crucial component of natural water bodies; the presence of a sufficient concentration of dissolved oxygen is critical to maintaining the aquatic life and aesthetic quality of streams and lakes.
The presence of a sufficient concentration of dissolved oxygen is critical to maintaining the aquatic life and aesthetic quality of streams and lakes. Determining how organic matter affects the concentration of dissolved oxygen (DO) in a stream or lake is integral to water- quality management. The decay of organic matter in water is measured as biochemical or chemical oxygen demand. Oxygen demand is a measure of the amount of oxidizable substances in a water sample that can lower DO concentrations.
Certain environmental stresses (hot summer temperatures) and other human-induced factors (introduction of excess fertilizers to a water body) can lessen the amount of dissolved oxygen in a water body, resulting in stresses on the local aquatic life. One water analysis that is utilized in order to better understand the effect of bacteria and other microorganisms on the amount of oxygen they consume as they decompose organic matter under aerobic (oxygen is present) is the measure of biochemical oxygen demand (BOD).
Determining how organic matter affects the concentration of dissolved oxygen in a stream or lake is integral to water-quality management. BOD is a measure of the amount of oxygen required to remove waste organic matter from water in the process of decomposition by aerobic bacteria (those bacteria that live only in an environment containing oxygen). The waste organic matter is stabilized or made unobjectionable through its decomposition by living bacterial organisms which need oxygen to do their work. BOD is used, often in wastewater-treatment plants, as an index of the degree of organic pollution in water.
Mon December 14 @ 7:00 pm – 9:00 pm
VIDEO. From the Sewer Authority MidCoastside meeting, Monday, 11/9/2020 board meeting. Presentation by SAM General Manager, Kishen Prathivadi.
SAM BOD Update 11/19/2020
VIDEO. From Montara Sanitary and Water District (MSWD) 11/19/2020 meeting. General Manager, Clemens Heldmaier, updates the directors on SAM’s BOD progress.
Meetings 1st & 3rd Thursdays at 7:30pm
Sewer Authority Mid-Coastside (SAM) ~ 2nd & 4th Mondays 7pm
Mon December 14 @ 7:00 pm – 9:00 pm
Watch remotely. Comments and questions by email.
SAM Meeting Videos via Pacific Coast TV
Our Mailing Address is:
Sewer Authority Mid-Coastside
1000 Cabrillo Hwy N.
Half Moon Bay, CA 94019
(650) 726-7833 (fax)
Regular Board Meetings are on the 2nd and 4th Mondays of each month at 7:00pm.
From time to time a meeting date may be changed, cancelled or relocated. Check the posted agenda for any changes to the normal schedule (click on links below).
The Sewer Authority Mid-Coastside (SAM) provides wastewater treatment services and contract collection maintenance services for a population of approximately 27,000 in the following areas:
- City of Half Moon Bay
- El Granada
- Moss Beach
- Princeton by the Sea
Director, Representing City of Half Moon Bay
Chair, Representing Montara Water & Sanitary District
Vice Chair, Representing Granada Community Services District
Secretary/Treasurer, Representing City of Half Moon Bay
Director, Representing Montara Water and Sanitary District
Director, Representing Granada Community Services District
VIDEO. Two pump failures in two weeks in early 2020.
Wipes and rags, as seen below, are the culprit.
Talk to your neighbors, please.
Repair for one pump can be $50,000.
Replacement is very, very expensive. A new pump can be a million dollars.
Burning out a generator can cost $100,000 to replace
~ Montara Sewer and Water District’s (MSWD) Board Member Kathryn Slater-Carter and MSWD General Manager, Clemens Heldmaier.
See how the sewer rates are static for years, then there has to be big increases?
Smaller Is Better: The Solution to California’s Ancient Water Pipes by Rinaldo Veseliza
Smaller Is Better: The Solution to California’s Ancient Water Pipes
Our aging infrastructure is a ticking time-bomb underground. We can begin to help repair it and stave off future trouble by reaping the benefits of smaller, decentralized microgrid systems.
WRITTEN BY Rinaldo Veseliza
PUBLISHED ONs Mar. 16, 2017
READ TIME Approx. 3 minutes
A system at the San Francisco Public Utilities Commission helps recycle water for on-site reuse for irrigation and other needs.Tara Lohan
AS A PRACTICING architect and LEED AP (Leadership in Energy and Environmental Design, Accredited Professional) for more than 40 years, I have scoured the planet for technological solutions to improve sustainability with water, energy and waste treatment. During the course of my projects, I often see the underbelly of the beast where aging underground systems have the potential to erupt at any time, particularly in earthquake-prone areas such as California’s San Francisco Bay and Los Angeles.
Our greatest current and growing problem is restoring and improving infrastructure systems to last another 50 years. We cannot fix all the massive underground problems, but we can instead replace them with smaller, local surface-mounted solutions that will lead us to more flexible, manageable, decentralized and sustainable systems.
It is the equivalent of, in communication technology, switching from giant mainframes to using cellphones. The technology is all available, automated and user-friendly. Microgrid technologies started with NASA space missions where astronauts recycled all their waste into water and created their own power on board. It is now time to apply our inventions and sustainability principles through our communities to a larger spaceship – our planet.
The infrastructure started in primitive little towns across the world, then septic systems were replaced by larger central plants and distribution systems as cities grew. Waste treatment plants were moved away from town centers to where the smell could be dissipated and tolerated. As cities grew, all the infrastructure expanded into a massive network to manage everyone’s needs.
Today, as much of this infrastructure is dated, landlocked or falling apart, we should consider reverse-engineering the concept of distribution so that small communities, large buildings and individual homes can provide their own water, renewable energy/power (and storage) as well as waste-water treatment.
It is difficult to fix hundreds and thousands of miles of underground piping that we cannot see. Most municipalities do not even acknowledge its existence, especially in times of economic difficulties. Deferred maintenance has been a problem in cities worldwide.
Centralized systems were great, big, expensive and “permanent” solutions for growing communities during their earlier development.
Now, as these overgrown, dense cities are overwhelmed with growing populations, we need smaller-scale microgrids, which can remove the mystery of processing stormwater and sewage water into usable/potable water with self-contained prefabricated modular systems and automated quick-response services. Decentralized waste-water processing and recycling microgrids will actually create many more jobs than our current central systems. They will also reduce the potential impact of cyber attacks and massive system outages.
For example, for about $3,000, a traditional home can be outfitted to recycle 80 percent of its waste-water and use it locally, reducing the need for potable water by that same amount. Office complexes can treat and recycle their own waste to 80 percent recycling onsite for irrigation, toilets and cooling systems. City blocks can also recycle their waste-water locally and reprocess it mechanically to re-use onsite, significantly reducing costs for upgrading their failing underground piping.
These smaller-scale solutions can each reduce the need for potable water by 80 percent, which would be a major accomplishment for our society. They exist now and should be utilized in all future buildings as well as retrofitted.
In a city with many hills like San Francisco, where pumping uphill can be costly, the local solution can solve many current problems, including savings in replacement costs, increases in efficiency and greater flexibility with maintenance and operations. The technology has been around for a long time, but municipal politics has prevented any such conversions, often citing potential public health risks as the main reason for not abandoning existing centralized plants.
Yet the aging, leaking underground sewage pipes are causing growing numbers of system spills which have a significant impact on public health. We cannot see all the damage caused until it is too late, after our underground water sources are polluted. Many municipal systems are finally looking into recycling a small percentage of the water they currently process and dump.
Refurbishing our existing communities, buildings, homes and infrastructure is a massive undertaking. However, with newer technologies at lower costs, we can re-design our own facilities but also export the collective knowledge throughout the world. As usual, the Europeans are somewhat ahead of the game because of visionary/mandated governmental initiatives to improve efficiency, particularly with solar photovoltaic, wind, hydroelectric, waste-to-energy plants and biomass power generation. We have made great progress in recent years in re-inventing our building technologies and reviving our leadership in engineering.
Solar power is the best example of technology that is already modular, local and self-supporting, providing our energy needs at source, creating the opportunity for microgrids to replace long-distance power transmission systems and associated inefficiencies. Smaller is better.
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About the Author
ARCHITECT AND DIRECTOR OF SUSTAINABILITY, ALISTO ENGINEERING GROUP
Wastewater and Microgrids for the Coastside? No More Inter-Tie or Outfall!?
- Video. SAM Employees Give BIG Thanks to General Manager Beverli Marshall for Her Four Years of Service.
- Video. What is ElectroScan & How Can it Help Sewer Authority Mid-Coast (SAM)?
- PODCAST. Managing sewage is the most important job on the planet ~Freakonomics: In Praise of Maintenance.
- Video. SAM Reports Zero Sewer Spills on the Coastside in 2018
- Video. SAM Meeting 4/22 ~ Partners with PG&E to Reduce its Carbon Footprint