Wild Weather

 
 
   

Biological Products:

Bioaugmentation products for Wastewater applications in Papermills, Refineries, Chemical, Tanneries, Municipalities, Textiles, Steel, Agriculture, Animal feedlot,  Gun Powder plant, Food and Beverage- Dairy Products, Orange Juice factory, Wineries, Cookie factory, Vegetable processing plant, Meat packing, Barbecue Restaurant, Aquaculture, Ornamental Ponds for algae control, CAFO, Nursing homes, Military, Campgrounds, Universities, Regulatory agencies

 

 

Lab Services:

Filamentous Identification Lab Service. One reason to identify filaments is to determine the filaments characteristics and then determine the type present.  If the type is found out, a root cause can usually be associated with a particular filament.  If the cause is known, then a correction can be made to alleviate problems. Chlorination is only a quick fix.  Without process changes, filaments will grow back after chlorination.

Wastewater Biomass Analyses and Cooling Tower Analyses also available

 

Training Materials:

Training is an integral part of any job. Not everyone is at the same level of training. Many people want beginning concepts and basics. Some need technical information or troubleshooting. Some want equipment, technology or process information.

We have developed a full set of Basic training, Advanced training, Filamentous Identification the Easy Way as well as custom training CD's Manuals. We also provide hands-on training classes and soon will have an Online "E-University".

 

Audits and Consulting:

At Environmental Leverage® Inc., we have a team of experienced individuals who come into your plant with a fresh pair of eyes.  The system is checked from influent to effluent.  System optimization, equipment efficiency and operational excellence are key components explored. Key Benefits Equipment efficiency Total Cost of Operation reductions Reliability and safety

An onsite audit is conducted to examine system parameters, process controls, and current monitor and control procedures. A physical walk-through is conducted, process flow diagrams are examined, previous design criteria are examined and current standard operating procedures are evaluated along with data logs.

 

 


 

Troubleshooting-Wild Weather

Latest News!

What's New!

We have just added "Virtual Audits" to our capabilities. Check out our new Services.  We are in the process of developing an ""Online E-University" in order to meet the needs of our global customers that cannot travel to our public classes. Stay tuned for details and updates.

 

How will wild and extreme weather impact  your plant?  What are some of the problems weather can cause?

 

wild weatherWeather is unpredictable. Extreme cold or high temperatures, excessive rain, hurricanes, blizzards or drought can all impact the conditions of a wastewater treatment plant.

 

What are some of the effects and some of the things you can do to combat these types of problems?

 

Obviously, most plants are designed with these issues considered. Many plants have spare EQ tanks, holding tanks, diversion ponds, heater or heat exchangers for just such occasions.

 

 Some plants do not and are stuck running around trying to jury rig what ever they can to limp through the sudden weather changes that can impact their plant.

 

Excessive rain can cause hydraulic washout. This can impact many different parts of a plant.

 

Hydraulic washout can cause problems in the primaries as well as the aeration basins. Washing out too much of the MLSSrefinery from the aeration basin as well as the clarifiers can make your biomass younger. While the carbonaceous bacteria can recover relatively quickly, the nitrifiers, if washed out, will take quite a while to rebuild up a significant amount of numbers capable to handle the plants influent. Waste less if this happens, and try to return more recycle if possible. If you have a once through lagoon, you can reseed with bioaugmentation cultures. Bioaugmentation cultures may be the carbonaceous bacteria, or nitrifiers, if really necessary.

 

hydraulic overloadHeavy rains can cause numerous issues just in a lift station for municipalities. Rain on the roads where construction occurs can wash off high levels of oils that cars drip while stuck in traffic waiting for lanes to change. This can cause foaming due to Nocardia and Microthrix, which thrive on excessive oils and grease.

 

Rain also can cause huge chunks of grease to dislodge in sewer lines and lift stations to make its way down to the primaries of a wastewater treatment plant. Check your primaries, if you have the skimmers that need to be adjusted by hand, make sure you do it more often after high rains to pull out as much grease as possible. Definitely, make sure someone comes in on the weekend if you only normally run 5 days a week to pull the grease off the primaries. Many plants overlook this and build up too much grease on the weekends and come in to the plants on Mondays with many problems.

 

 

 

Both of these conditions can cause foaming in the aeration basin. Try to remove as much of the oil and grease in the primary as possible.

 

oil on clarifier  grease turtles grease in lift station

 

 

High rains, hurricanes or flooding can cause clarifiers to washout easier than many of the other parts in the system. This can cause the beds to riseclarifier washout and float out over the edge of the clarifier, loosing a critical amount of your MLSS. Clarifier Optimization and troubleshooting

 

Some plants have an EQ tank, a diversion tank, or empty aeration basins or clarifiers that they can divert some of the excess flow during high rains in order to bleed some of the water back into the system after the high rains have stopped. This is the best case scenario and allows the plant time to recover from the heavy rains, without causing any washout or loss of MLSS and efficiency of the plant. Some plants are not allowed this luxury.

 

empty clarifier empty tanks

 

Municipalities and some food plants that have to disinfect prior to discharge are significantly impacted by high rains and hydraulic overload. If the flows are too high and run too fast through the systems, especially if they have UV or ozone, they might have a hard time meeting permit levels. A typical 3-4 MGD plant can sometimes get as high as 10-15 MGD flow with very heavy rains! That is incredibly hard on a biological plant to handle.

 

wetlands fireDroughts or fires on the other hand can cause problems to the opposite extreme. Dry weather for municipalities can tend to cause the flows to go lower, the MLSS to get significantly older and filaments sometimes can dominate due to longer MCRT and lower F/M ratios. When this happens, adjust your bed levels in your clarifier, lower your MLSS according to your microscopic evaluation. If you typically run at a medium age sludge and stalked ciliates and a few rotifers are dominant, but suddenly you only have rotifers and many worms, you know you are too old and need to increase wasting.

 

Fires can cause additional problems, especially if inside the plant such as an industrial site, or a fire in a city and the water
from a house burning is flushed down the drains. The chemicals in the water may be harsh, impact the pH and alkalinity in the system, they may have significantly higher BOD levels and need an adjustment to the MLSS. There may be foaming chemicals that were used and this may cause foaming on the aeration basins. There may be toxic chemicals to the biomass or specifically the nitrifiers.

Watch your system carefully after a fire, run more tests, check your nutrients if the incoming stream is higher in BOD. Look under the microscope at the bacteria, they will tell you what is going on long before it becomes critical.

 

Cold weather extremes can significantly impact a wastewater treatment plant. Did you know that for every 10° in temperature that the MLSS drops, the activity of the biomass changes one logs growth!!! Obviously, that means if the temperature drops below 70° or 60 F, you will have to increase your MLSS. If it gets really cold, you may need to carry a MLSS and have a higher bed in your clarifier 2-3 times what you do in the summer months

 

winter wastewater winter wastewater

 

Oxidation ditches have many problems in the winter months due to the fact that they have a larger surface area. Also, they don’t have the benefits of some activated sludge plants that have Mechanical mixers that do generate some heat.

Microthrix parvicella, a filamentous bacteria that can cause serious foaming problems loves cold weather, and many ditches seem to grow a significant amount of filaments in the winter. Watch all the variables at the plant and you can work around these issues.

 

Lagoons and once through system have a significant disadvantage also in the winter months. They cannot increase their RAS, so they are limited on their ability to degrade BOD. Remember that it is always a time and numbers game in a biological system. How much time you have is limited by the size of the equipment. You can only play with the numbers to adjust to changes in the incoming BOD values. Luckily, lagoons can use bioaugmentation during the winter months and still beat the game.

 

algae in clarifierExtremely high temperatures can cause problems also. The higher the temperature, oxygen transfer changes. Even though activity increases, DO levels seem to drop off in the summer. Filaments and algae tend to increase in the summer. Gassing and denitrification can increase also. Adjust your bed levels in your clarifier, increase wasting if necessary. Some industrial facilities even need to install heat exchangers, especially papermills.

 

If yougassing in clarifier start to climb over 100° F, you will still get BOD degradation, as long as it is a steady temperature range. If your plant tends to jump around higher and lower in temperature, your biomass may start to get temperamental. Any time you make more than a 10% change, it is major to the bacteria. Try to keep that in mind when making any adjustments.

 

Some plants consistently run from 115-120 ° F. These plants will get some BOD degradation, but will have poor floc formation, high TSS levels and have to watch their permits for TSS. Polymer consumption will probably increase also.

 

Contact Environmental Leverage Inc. if you need help with your plant on some of these issues!!


Summer impacts on your plant
Fall Turnover
Hurricane or Severe Weather Upset recovery programwaterfall
Wastewater in the Fall- Problems and Solutions

 

Wastewater Training Classes

Wastewater Training CD's