Acid Sludge Reclaimantion

Where in Bangkok, what process is the acid sludge from? what you are doing just consume too much time, waste water and heat, but surely it is 1 way to turn it into valuable product such as yours blown asphalt. however you may also look into better alternatives like soil amendment using acid sludge as main additives. My factory produce 1 ton of such waste daily and we convert it into fertilizer, or if you just want to get rid of it you may look at mixing fly ash into the acid sludge the end product is a harmless powder or sand like material which you can dump it in any landfill or use it as a mixer for cement or bricks making (+/- 10% additive)...