Dear Sir In Thailand we use ...

Dear Sir

In Thailand we use polymer and pac to make sludge of AS which treat WW from high Building then using filter press then go to landfill and right now some group try to use to produce the organic fertilizer or soil additional to make soil has high quality. But you need to ferment until VS has gone and make sure that no heavy matel inside including sterilization for phatogen. I used to have the experiment for Anaerobic sludge from Cassava plant add to cassava field the yield increase from 4 ton to 10 tons or more but this is still inlegal ...for the goverment but most of the farmer who live colse to cassava plant they have been used so long time more than 15 years.