ANITA™ Mox - MBBR sidestream ammonia treatment

Product name

ANITA™ Mox

Primary media

Wastewater

System type

Engineered systems

Process characteristics

Anoxic

Technologies

Moving bed biofilm reactor

Installation

Above ground

Availability

For sale

ANITA™ Mox is a moving bed biofilm reactor (MBBR) for treating high-ammonia effluents.

The system removes ammonia from effluent before it is recycled back into the digester for further treatment or discharged in the environment.

Benefits

Compact and flexible process, easily adaptable for upgrading of existing plants.
Alternative to building new biological units where space is limited.
No carbon source needed, reducing operating costs and environmental impact.
Advanced control system.

Performance

Up to 90% ammonia and 75-85% total nitrogen removal.
Compared to conventional ammonia removal by nitrification / denitrification,
it requires:
     60% less oxygen
     25% less energy
     40% less external carbon source
and produces:
    85% less CO2 emissions
    90% less sludge (due to slow growing bacteria).

Robust process with low sensitivity to toxicity and nitrogen concentration fluctuations.
Quick start-up by using pre-colonized media developed in BioFarms.

Sidestream nitrogen applications

Liquid waste from digested sludge dewatering typically has high levels of ammonia and low COD concentration. When sent back to the head of the digester, these concentrated effluents generate an increase in nitrogen load up to 20%. The impact on the performance of the plant is significant since approximately half of its energy consumption is dedicated to the biological nitrogen removal.

ANITA™ Mox operating principle

The ANITA™ Mox solution combines an aerobic and an anoxic process into one moving bed biofilm reactor (MBBR), using both conventional nitrite producing bacteria and a specific Anammox biomass. Contrary to traditional denitrification, there is no need for any costly external carbon source, such as methanol.

The high-ammonia effluent flows into a MBBR reactor filled with carriers which are kept in suspension by aeration and mixers. These carriers are specially designed for ammonia oxidating bacteria to develop as biofilm. Specific conditions related to temperature and oxygen level are maintained within the MBBR to encourage the growth of this biofilm.