The present application relates to biofiltration materials for filtering a fluid. More specifically, the present application relates to a biofilter material comprising consolidated organic material, and use of such biofilter material for wastewater treatment. Provided is a biofilter bloc for wastewater treatment comprising a porous consolidated assembly of at least 20% w/w of organic materials, and wherein the consolidated assembly shows a density of about 35 kg/m.sup.3 to about 275 kg/m.sup.3.

An enhanced multiple compartmented (segmented or chambered) supplemental tank system that (i) adds another media to enhance wood chip denitrification, and (ii) includes a component for recycling treated wastewater back to the front end of the system with mainly nitrate-N recycled back and combined with organic carbon (present in wastewater) under anoxic to form nitrogen gas and CO.sub.2. The latter uses an aeration pump and tubing to reduce soluble organics and assist with the conversion of ammonia-N to nitrite-N and nitrate-N.

The present application relates to biofiltration materials for filtering a fluid. More specifically, the present application relates to a biofilter material comprising consolidated organic material, and use of such biofilter material for wastewater treatment. Provided is a biofilter bloc for wastewater treatment comprising a porous consolidated assembly of at least 20% w/w of organic materials, and wherein the consolidated assembly shows a density of about 35 kg/m.sup.3 to about 275 kg/m.sup.3.

The present invention relates to a process for refinery wastewater treatment. More particularly, the present invention relates to an automated process for treatment of refinery wastewater. The process of the present invention provides complete automation for controlling different critical parameters that enhance biological activity of activated sludge process (ASP) and helps in significant reduction in sludge recycling that increases the treatment efficiency.

A wastewater treatment apparatus includes a plurality of water troughs for treating the wastewater including a first trough configured for flowing wastewater to a second trough. The first water trough includes a biogrowth media, and a wall having a plurality of passages positioned along a width of the wall and positioned along a height of the wall, the plurality of passages permitting water to exit the first water trough via the plurality of passages in the wall. The apparatus also includes a discharge channel of the plurality of water troughs, the discharge channel having a wastewater inlet for receiving wastewater that has flowed from the first water trough and the second water trough, the wastewater inlet being configured to be stationary.