Biozone Sewage Package Treatment Plant

The great attraction of the Biozone system is that the treated sewage water is safe to use for irrigation, reintroducing in to rivers or dams, or even in to the house flush systems and generates no sludge which has to be removed regularly. Obviously this is an environmentally friendly system which saves costs and water.

For new projects such as a new Mine Housing complex or remote Game Lodge, the preferred option is to go for a Package Treatment plant such as the Biozone system rather than to go for a septic tank and French drain system which pollute the earth and ultimately have to be drained to eliminate the harsh sewage odours produced.

Where septic tank/French drain systems have been used invariably these need to be replaced with a Biozone system as they have either blocked up and flooded due to badly drained soils or high rainfall. Often the services of a “Honey Sucker” ( to suck out the sewage from the septic tank and transport off the property) need to be called in. The option of being able to recycle the treated water is therefore extremely attractive to the end user.

“4 Shin” biological treatment technology description.

Bacteria, if grown correctly, are capable of removing nitrogen from waste-water through a two step biological processes, nitrification and denitrification and this is the process used in the Biozone system. The organic material and nutrients are removed from the waste-water flowing past the attached bacteria growth on the biofilm whilst air is introduced to the process.(aerobic).

Bacteria colonies are grown on a submersed fixed film media where they feed on organic nutrients (sewage). Oxygen is introduced at the correct levels in to the treatment tank (bioreactor) to encourage and promote bacteria growth. In so doing COD ( chemical oxygen demand)levels are reduced, nitrification and denitrification occurs and nitrates and ammonia levels are controlled rendering the water safe for recycling.

Once the bacteria mature, they die and the system scours them off the media. These dead cells are then collected and recycled back to the first tank to be retreated.

This allows the plant to generate zero sludge. The clear water can then be sterilised by means of ozone or ultraviolet technology. Once sterilised, the treated effluent is ready for discharge, either by means of irrigation, or to return into dams or rivers.

The Biozone system and process described:

The raw sewage is channeled to a submerged tank, ( this could be the old septic tank) where non biodegradable products are separated.
The sewage is then pumped in to the first reactor tank which contains bacteria growing on media and where the nitrification takes part.
From the first nitrification reactor tank, the sewage is then pumped in to the second reactor tank where denitrification occurs, also with bacteria reaction.
Then the effluent is pumped in to the clarification tank which is cone shaped and where any solids that escaped the first 2 tanks are collected and pumped back to the first tank.
From the clarification tank, the now clean and treated water overflows in to the last tank where sterilisation occurs using ozone or Ultra violet.
In the sterilisation tank is a submersible pump which will automatically pump the treated water to irrigation, or dams, rivers etc.