Pure oxygen activated sludge process / Sludge drying, Recycling drying

This article is about pure oxygen activated sludge process which is one of various activated sludge method in wastewater treatment.

In conventional activated sludge process, activities of microorganisms and activated sludge are stimulated by air sent into reaction tank and aerobic tank. However, amount of oxygen contained in the air is 21%. By adding pure oxygen into reaction tank, microorganisms and activated sludge become more stimulated and cleaning ability is improved. Compared with conventional activated sludge process, site area can be smaller because processing ability improves 2 – 3 times more. Also, based on a comparison with conventional activated sludge process, amount of waste sludge is smaller and amount of gas discharged and diffused at reaction tank is also smaller, therefore, problems about odor and splash will be improved.

Types of waste water treatment / sludge drying, slurry drying, waste drying

Water in the sludge thickened in the sludge thickener tank are removed at dehydration process to a certain degree.
However, moisture content is normally more than 80% and the sludge still has adhesiveness and stickiness. Also, latter processes are not easy because of influence of flocculants. Our drying apparatus of KENKI DRYER with international patented technology can surely dry any sticky, adhesive and viscus sludge, and also materials in liquid state like slurry, without clogging inside of the dryer. Also, because of its simple structure, its price is low and apparatus cost of the dryer can be retrieved by reducing industrial waste disposal cost within 3 years. Dried materials can be recycled as fuel, bacterial fertilizer, soil conditioner, etc. since component of the material is hardly changed because of its low-temperature drying method.
It can be applied to a system with pyrolysis apparatus as well.

Sludge drying

Applications