Friday, January 18, 2019

SEPTIC TANKS - Septic tanks work by allowing waste to separate into three layers: solids, effluent and scum. The solids settle to the bottom, where microorganisms decompose them. The scum, composed of waste that’s lighter than water, floats on top. The middle layer of effluent exits the tank and travels through underground perforated pipes into the drainage field. There, gravel and soil act as biological filters to purify the wastewater as it sinks into the ground. Flushing plastic materials, disposable diapers, paper towels, nonbiodegradable products and tobacco will also clog the system. Limit your water use. Reducing the amount of water that runs into your tank, particularly over a short period of time, will prevent the flushing of untreated waste into your drain field.

How Does a Septic Tank Work?
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Septic Tanks
How Does a Septic Tank Work?How Does a Septic Tank Work?

Jim vonMeier


Save big money by understanding how does a septic tank work — and what can go wrong — so you can perform your own septic system maintenance.
By the DIY experts of The Family Handyman Magazine
A well-designed, properly installed septic system can last for decades—or fail in just a few years. It’s up to you as long as you can answer how do septic systems tanks work.
Maintaining healthy septic systems isn’t all that expensive, but you could easily spend tens of thousands to dig up and replace a septic system that has totally failed.
As the old saying goes, an ounce of prevention is worth a pound of cure. It’s important to learn how does a septic tank work.
Good maintenance starts with understanding how does a septic system works and how it can fail. Let’s take a look underground and see what’s supposed to happen in a well-functioning septic system.
After that, I’ll show you why things go wrong and give you some pointers for keeping your system in top shape.
It’s a cafeteria for bacteria
Bacteria are what makes a septic system work. They break down waste, leaving water clean enough to safely percolate down into the earth.
The whole system is designed to keep bacteria healthy and busy. Some live in the tank, but most do their work in the drain field.
1. All waste flows to the septic tank.
2. Watery waste, called “effluent,” fills most of the tank. Anaerobic bacteria begin breaking down the organic material in the effluent.
3. A layer of sludge falls to the bottom. Sludge is composed of inorganic solids and the byproducts of bacterial digestion.
4. A layer of scum floats to the top. Scum is primarily composed of fats, greases and oils.
    The septic tank acts like a settling pond. Greases and oils float to the top. Heavier solids sink to the bottom.
5. A filter prevents most solids from entering the outlet pipe.
6. Effluent flows to the drain field.
The drain septic field provides a large area where bacteria can thrive and treated water can seep into the ground.
7. Holes in the drain septic field pipe allow effluent to seep into surrounding gravel.
Gravel around pipes allows water to flow into soil and oxygen to reach bacteria.
8. Aerobic bacteria in gravel and soil complete decomposition of the waste.
9. Clean water seeps down into the groundwater and aquifer.
Don’t abuse the system
A septic system that was properly designed and installed needs only occasional ‘pumping’ to remove the sludge and scum from the tank.
But without knowing how does a septic tank work, you can do things that harm—or destroy—the system.
·          Waste that decomposes slowly (or not at all) gets flushed down drains. Cigarette butts, diapers and coffee grounds often cause problems.
·          If used heavily, garbage disposers can send too much solid waste into the system.
·          Lint from synthetic fibers flows from washing machines. Bacteria in the tank and drain septic field can’t break it down.
·          Household chemicals like disinfecting cleaners and antibacterial soaps kill bacteria. Most systems can handle light use of these products, but the less you use them, the better.
·          Too much wastewater over a short period of time flushes out the tank too rapidly.
·          Too much sludge reduces bacteria’s ability to break down waste. Excess sludge can also overflow into the drain field.
·          Sludge or scum plugs holes in the pipe.
·          Roots from trees and shrubs can clog and damage a drain field.
·          Compacted soil and gravel block seepage of effluent and deprive bacteria of oxygen. This is often caused by cars driving or parking on the drain field.
Pumping removes the buildup of sludge and scum, which slows down bacterial action in the tank.
Your tank may need pumping each year, but it’s possible to go two or three years between pumpings, depending on the size of your tank and the amount of waste you run through the system.
Ask your inspector to make a rough recommendation for how often your tank should be pumped.
Septic tank pumping
Regular inspections and pumping are critical. But if you’re not squeamish, you can check the sludge level yourself with a device called The Sludge Judge. It costs $100 to $125 and is widely available online.
Once you’ve determined that your tank is one-third full of sludge, call a contractor to come pump it out.
Septic tank diagram
Waste from your house settles into three layers. The septic filter keeps the drain field pipes from clogging.
Ask your contractor to install an effluent filter on the outflow pipe on your tank. (It will probably cost $50 to $100, plus labor.) This device helps prevent solids from entering the drain field and will need to be cleaned out on occasion by a contractor.
Solution for a clogged septic system
If your septic system becomes clogged and you frequently have to clean the filter, you might be tempted to simply remove it. Keep it.
Septic tanks work by allowing waste to separate into three layers: solids, effluent and scum (see illustration above). The solids settle to the bottom, where microorganisms decompose them.
The scum, composed of waste that’s lighter than water, floats on top. The middle layer of effluent exits the tank and travels through underground perforated pipes into the drainage field.
There, gravel and soil act as biological filters to purify the wastewater as it sinks into the ground (see illustration above).
Your state health code requires an effluent filter, so keep it in place. (Not all regional codes require this filter.) Besides, removing the filter could create a far worse (and expensive) problem.
Without the filter, waste particles could pass into the perforated pipes and clog them. It would require extensive digging to clean and unclog the system.
However, your filter should not need semiannual cleaning. Most filters don’t have to be cleaned until the tank is pumped, which is typically every two to five years.
Chances are you’re putting filter-clogging materials down your drain, such as grease, fat or food scraps.
The use of a food disposer is a common mistake. A disposer won’t break down food particles enough to allow them to pass through the septic tank filter.
It can increase the amount of solids in the septic tank by as much as 50 percent.
Flushing plastic materials, disposable diapers, paper towels, nonbiodegradable products and tobacco will also clog the system.
You may be able to improve the performance of your system by adding bacteria with a product such as RID-X. Your pro should be able to tell you if your system will benefit from this treatment as you discover how does a septic tank work.
Alternatives to a new drain field
If an inspection or sewage backup reveals that your drain field is in trouble, the ultimate solution is to replace it. The cost can be huge, however, so it’s worth discussing other options with a contractor.
·            Clean the pipes. A contractor can clear out the drain septic field pipes with a rotary pressure washer. “Jetting” the pipes usually costs about $200.
·          Treat the system with chemicals. Ask your contractor about treating your system with a commercial product (not a homemade one) that increases the amount of oxygen in the drain field. I recommend Septic-Scrub. A typical treatment costs $500 to $1,000.
·          Loosen the soil. In states where it’s legal, some contractors can fracture compacted soil around the pipes by injecting high-pressure air in numerous locations around the drain field, a process called “terra-lifting.” Depending on the situation, this can cost less than $1,000 or more than $4,000.
Don’t overload the system
Limit your water use. Reducing the amount of water that runs into your tank, particularly over a short period of time, will prevent the flushing of untreated waste into your drain field.

You can replace old toilets with low-flow models, install reduced-flow showerheads, and simplest of all, wash laundry throughout the week rather than just on Saturday morning.
Jim vonMeier believes septic systems are the answer to America’s water shortage because they deliver purified water to depleted aquifers. He travels the country advocating, lecturing and testifying on septic systems. If you have a septic system question and want to know how does a septic tank work, write to him.
https://www.familyhandyman.com/plumbing/how-a-septic-tank-works/
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How Does a Septic Tank Work?

FH15MAR_SEPTIC_01-2 how does a septic tank work septic systems, septic fieldIt's a cafeteria for bacteria

Don't abuse the systemHow Does a Septic Tank Work?How Does a Septic Tank Work?

4 comments:

  1. Grease traps have been used throughout the world since the 19th century to capture oils, fats, and greases, thus preventing them from entering the wastewater sewage system.

    ReplyDelete
  2. Improper grease trap maintenance can result in grease trap backups, waste water leakages, or bad odors within the kitchen, jeopardizing the cleanliness and safety of your kitchen and food processing facilities.

    Modesto Septic Service Pros

    ReplyDelete
  3. Household wastes travel through a main line into the septic tank. The bacteria that occur naturally in the waste work to break material down in the tank.

    ReplyDelete
  4. Called for our first Pump and was scheduled the next day! Very nice. Process was quick. Tech answered my many questions. Great job.

    June

    ReplyDelete