Biological Aeration Filter (BAF) process was used in an on-the-spot test of the biological treatment of the slightly-polluted water in a refinery.

Aiming at the poor effect of amino nitrogen degradation in conventional refinery oil sewage treatment, the secondary biochemical test was carried with biological aeration filter pool.

The treatment of high concentration ammonia wastewater by a membrane aeration biological reactor(MABR) made of coal-based carbon tube membrane was studied in laboratory scale.