For sludge reduction, what is the main source and how to cut down?

Question

Dear all,
1.The sludge we handle about 70 ton/day , and the water content of sludge is about 80% .The sludge could come from the wastewater about 45,000 ton/day in the 6 units of WWTP., and the chemicals we added. The process of WWTP, 2 units is primary treatment (PAC and polymer, coag-floc-settlement), secondary treatment (activated sludge), polymer floc-settlement and sand filters; 3 units is shock tank /equalization tank, secondary treatment (activated sludge) and membrane filter; 1units is equalization tank and settlement.
2.What is the main source of sludge in the WWTP, (1) the suspended solids or COD of the influent water , (2) the chemicals we added (such as the PAC, Poly Aluminum Chloride), (3) the derivatives from the activated sludge in secondary treatment. Could we estimate the proportion of the source approximately? that can help us to reduction the sludge. (a) add some chemicals to enhance the sludge dewatering efficiency , reduce the water attached to the sludge,(b) add organic PAC to replace the Poly Aluminum Chloride , (c)operate the Anoxic-Oxic process to replace the aeration process, or add  the microorganism to degradation the sludge from  secondary treatment   .
Thanks all.

Sampath Kumar · Answer

We have a new technology that can be employed in all sewage treatment plants and it does not generate any sludge. The gist of the process is like this. We have a nano nutrient that helps the growth of Diatom algae in any waste water. This algae produces copies quantities of 100% pure nano bubbles of oxygen under water. The increasing DO helps aerobic microorganisms in breaking down the sludge, BOD,COD , Suspended organic matter . No / very little sludge is generated in this process. Please see web www.nualgi.com for details. you may contact email arun1@nualgi.com for details. We are located in Bangalore India.

Water Network Research · Answer

Answered on the facebook group for operators- 
by Chris JonesTop Contributor
I have experienced the adding microorganism and it reduced sludge like 40% in my digester. Don't know why all plants are not feeding this product. I tried because town 10 miles away had been using for few years. They are 1.0 mgd facility..and went from running belt Press 3 times a week to 1 time a month just to keep Press parts moving and not sitting there long time without running.

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