We are working on a major project to improve the Sewage Treatment Plants (STP) in Hyderabad, India.
Most of the STP' s are old and built in the late 80s. I'm looking for ways to upgrade these existing plants to more advanced but affordable technology so that they use less energy and become more efficient, have lower installation and maintenance costs and require less land.
Has anyone worked on upgrading old STPs with advanced technologies? Please share your suggestions and experiences.
Hi Anish, I am working on projects in Australia upgrading STPs that are over 30 years old. I have found switching the old aeration technology to fine and ultrafine bubble technology to give an immediate reduction in energy costs in the order of magnitude of 2-3 times.
You can get rid of the clarifier by retrofitting membranes into the existing aeration tanks to convert them into an MBR type process. My company has successfully done this in a number of STPs. This will reduce your footprint by about 1/3.
MBR is much smaller, easier to install, operate and maintain than conventional activated sludge processes. This is the standard process my company is implementing across Asia and Australia at the moment. BOD is
1. Aerobic Bio-culture 2. AnAerobic Bio-culture 3. Bio-culture to reduce Oil & Grease 4. Bioculture to reduce Ammonical Nitrogen Level 5. Bioculture for composting level.
We have the consortium of potential microbes, which are capable to reduce organic pollutants and odour during seewage or effluent treatment.
The enzyme secreted by the bacteria will break down the higher and complex organic compounds which will be easily assimilated by the bacteria, which encourages in the development of potential biomass and reduction of cod.
The product efficiency depends on the following parameters.
pH Temperature COD Bod Ammonical nitrogen Oil and grease DO Retention period, if the retention period increase means the soluble COD will increase. MLSS MLVSS
Our products work best in
pH - 6.5 to 9
Temperature - we have ranges of pdts related to temperature
Yes we worked on a using customized microbes which can work under minimum mechanical inputs especially aeration but clean the sewage and domestic waste water more efficiently. I am based out of Vijayawada nd can give more details if you find it interesting to collaborate with us.
Upgrading with MBBR is a great solution, without having to build to increase volume. MBR seems too expensive and complex for this problem. However pre-treatment and secondary clarification capacity depend largely on peak-flow and need to be tackled separately. An acceptable solution for this can be the installation of a generously dimensioned equalization and homogenization tank, with adequate mixing and pre-aeration equipment (to avoid bad odor development). Self aspirating surface aerators with swing-arm to accompany level variations are a good option. This way your available treatment capacity can be used practically during 24h/day and peak loads are smoothed out.
The Norwegian's developed the MBBR process as an inexpensive means of upgrading and increasing the treatment capacity of existing wastewater treatment plants that had absolutely no room for expansion - many being located between the base of a cliff and the ocean. There are other hybrid technologies and MBR processes you could consider, but I believe from an overall sustainability basis the MBBR is likely your best choice. It is very simple to operate; has lower aeration energy costs than a MBR process and no membranes to replace; it does not have the sludge bulking problems experienced at conventional activated sludge processes; capacity can be expanded and reduced to accommodate variable loading by adding or removing media; the waste biosolids typically settle and dewater well; and the inherently long sludge ages minimize biosolids treatment and disposal costs; and there is a great deal of price competition in sourcing media.
Om Enviro Solutions, located at Nashik, an independent environmental firm deals with wide range high quality of equipments and chemicals used in waste water treatment, Reverse Osmosis and zero liquid discharge
We will offer high quality of equipment’s required for the treatment of the waste water generated by specific industries, which will give us encouraging and desired result with in the permissible limits of pollution control boards norms.
Equipments
We offer the following equipment’s as per the quantity of waste water generated and the treatment processes.
Agitator / flash mixer
Tube Settler
Pumps like dosing pumps, centrifugal pumps, sludge suction pumps.
Oil & Grease Separators
Filter Press
Air Blowers
Diffuser
Micron filter
Acf & sf
Ro membrane etc ,
We have a team of experts with good exposure to the process calculation and designing of the waste water treatment plants.
Chemicals
We offer the following chemicals which are genuine and result oriented.
Dosing Chemicals like
Alum
Poly electrolyte
PAC
Lime
Antiscalents
RO Chemicals etc.,
We do provide specialized chemicals for the biological treatment processes.
Bio-cultures
Enzymes
Micronutrients
Odor control bio agents
Features of our products are
· High Efficiency
· Effective in working
· Result oriented
We have a team of expert who are experienced in stabilizing the treatment process of Effluent treatment plant of various industries like leather tanneries, Textiles, Dairy, Pharmaceuticals, chemicals, food and beverages as well as Sewage Treatment Plants,
We are ready to undertake stabilization projects also.
Hence I request you to give us a chance to make your name in our client list as well as to achieve encouraging results in waste water Treatment
I already wrote to You that this site will be enough for the reconstruction of wastewater treatment plants and still have room for soccer fields !!! Our equipment takes place FIVE TIMES less than the biology and consumes FOUR times less electric energy construction and Assembly work 30% lower analogues, the cost of construction of sewage treatment plants is equivalent to 550 $ US for 1 cubic meter of wastewater . ($550 x X effluent = the cost of the equipment) my address: tumentsev@inbox.ru
Best solution is the DIP System. Direct InLine sewage pumping - no wet well, no clogs, lower install costs, energy efficient and very low maintenence. http://www.imexconsultinggroup.com/side-industries---dip-system
We can help to upgrade existing activated sludge or any biological wastewater treatment. Kindly send an email on levapor.india@gmail.com and I will get back to you with more information.
Anish, be advised that you need to get someone who knows what they are doing - unless you are a student and this is just an exercise which you need to complete for your dissertation????
uploaded a plant layout above. please suggest the treatment methods that can be replaced or improved to make the plant more energy efficient and cost effective.
If You really want to get acquainted with INNOVATIVE technology that allows you to shred the sewage TO a SMALLER ( five times) SQUARE, WITH FEWER ( FOUR TIMES) cost of electricity - COME TO US. We have the data from the treatment plant operates on complex drains more than 6 years. The cost of electricity for cleaning and disinfecting one cubic meter amount to not more than 0.7 kW. Equipment and technology we have developed ourselves. They themselves produce the equipment for any number of drains. Wastewater treatment is nearly instantaneous. So if You are really interested in reconstruction, we welcome you. On actual production will be easier to explain and show. tumentsevs tumentsevs@gmail.com
Please see our innovative MABR technology for the biological treatment by simultaneous nitrification and denitrification aerated membranes with only 10 to 20% energy consumption of a conventional treatment..
The energy consumption of the aerated system can be lowered significantly by using Delta Hybrid blowers from Aerzen. Fine bubble plate diffusers will also reduce the energy consumption. I've seen this happen at Dutch water authorities. Also remember that modern pumps and things like soft starters have a significant lower energy consumption than stuff from the 80's. The Dutch water authorities have a major focus on energy reduction the last years. This to lower the carbon footprint and to lower the operational costs. You can ask them for independent advice, they are willing to share their knowledge with countries outside Europe.
Then some not so independent advice; The BIOPAQ®UBOX from Paques is a combination of anaerobic and aerobic waste water treatment build on top of eachother. Due to the anaerobic part, the energy consumption is much lower than in a fully aerated system. We have very good experiences with these system on communal waste water in Brazil. Paques has a sales office and a brand new factory in the south of India. So that could be a good option for your case.
Anish, the answer is not easy as it requires a variety of factors like treated effluent parameters, the extent of treatment desired, land area available, the increase in the capacity etc. Best would be to engage an experienced and unbiased consultant to audit the existing set up and then, suggest a suitable upgradation. Many companies will offer solutions suited to what they offer as a system, which may not be the best for your situation. Again, the muncipal outfits may not want to go for solutions,, which may be better than the existing processes. All stakeholders need to buy in an optimum solution.