Some Answers to Your Questions!

    What are small Sewage Treatment Plants?

Small Sewage treatment plants are those that fall under the category of 1 KLD to 250 KLD. EcoTec provides fully automatic systems that can be placed in underground tanks or even in existing septic tanks. The treated water from these plants beat the threshold set by government by a very high degree. The operation and maintenance of these plants are very low when compared to the expense of running a STP from where sewage is taken out in trucks regularly and sometimes even daily. For example the operation charge for a EcoTec STP system in a 50 apartment building is only 150 Rs/ day and there is no need for an operator. The treated water can be used for flushing after disinfection.

What advantages make SBR more reliable choice of technology?

SBR plants are usually automated and are less dependent on operators in small sewage treatment plants. In a batch process like SBR water is filled into the reactor and processed for a longer period of time until it is fully treated and then let out once the batch of water is treated. EcoTec SBR works in 4 batches in a day during normal operation and with lesser cycles when there is less sewage output. On the other hand continuous processes struggle when there are load and flow fluctuations.

How does SBR system take care of low occupancy and low load in sewage?

Our intelligent sensing system in our advanced plants can detect the low flow conditions and adjust the treatment to the low  inflow automatically. If there is a continous low load conditions the program can be revised for low flow. Both work the same in saving energy and yet providing required treatment maintaining the MLSS necessary for the treatment process.

How does one know when to carry out maintenance or service of the plant?

Each plant has its own service and maintenance plan programmed in the controller. When the time for service and maintenance is nearing, the plants send alarm for service and maintenance respectively. You have to call the professional for service of the plant based on the warning message.

What are the standards available for such treatment and technologies?

When it comes to small plant, at present there are no design standards available in India that government stipulates. There are systems that use standard designs and are more reliable as they are regulatory and statutory means to be followed by designers and technology providers. Sequencing Batch Reactor is one of the standardised methods of treatment of sewage. Although there are some proprietary techniques adapted by various companies, the basic design and the principle of operation remains the same. EcoTec uses standardised SBR design and follow   German Standards for sewage treatment plant design as this is one of the most reliable worldwide.

Why do STPs fail so often and many tanker Lorries are found removing and disposing sludge and sewage everywhere we see?

Badly designed collection tanks are cause of failure of many sewage treatment tanks; most of the water comes in 3 hours of the day in the morning and 3 hours in the evening. Collection tank also has to be designed factoring in these details and the interval for removing the settled and floating sludge in collection tank. Most operators blame residents of using a lot of water, soap, detergent, disinfectants and oil. A properly designed tank should be able to handle the household waste that comes from a residence and community.

Is there a need to have a sludge press for the EcoTec SBR?

No! EcoTec SBR design takes care for reducing the need for frequent sludge disposal in EcoTec SBR. The bio-sludge build up is reduced by providing a sludge recirculation process  where sludge is accumulated at the bottom of the collection tank and can be removed once in year or even with longer storage. Our engineers can tune the plant to have more or less circulation based on local conditions.

If something goes wrong, how can one know it?

It does not happen often, but when it happens there are alarms that give you the information on failure. Most of the failures are with machine and controllers, which can be solved in a matter of hours. There is no need for getting into the tanks for any repair any time.