ค้นเจอ 177 รายการ

Nitrification

แปลว่า(Environmental Engineering) The biological oxidation of ammonia and ammonium sequentially to nitrite and then nitrate. It occurs naturally in surface waters, and can be engineered in wastewater treatment systems. The purpose of nitrification in wastewater treatment systems is a reduction in the oxygen demand resulting from the ammonia.

Denitrification

แปลว่า(Environmental Engineering) The anoxic biological conversion of nitrate to nitrogen gas. It occurs naturally in surface waters low in oxygen, and it can be engineered in wastewater treatment systems.

Elementary reaction

แปลว่า(Environmental Engineering) A reaction in which the rate expression corresponds to the stoichiometric equation.

Chemical oxygen demand (COD)

แปลว่า(Environmental Engineering) The amount of oxygen required to oxidize any organic matter in the water using harsh chemical conditions.

Nonpoint source pollution (NPSP)

แปลว่า(Environmental Engineering) Any pollution from a source which cannot be attributed to a particular discharge point, e.g. from agricultural crops, city streets, construction sites, etc.

Receiving water

แปลว่า(Environmental Engineering) A water which receives wastewater (treated or otherwise) discharges.

Metabolism

แปลว่า(Environmental Engineering) The processes which sustain an organism, including energy production, synthesis of proteins for repair and replication.

Nitrogenous oxygen demand (NOD)

แปลว่า(Environmental Engineering) The amount of oxygen required to oxidize any ammonia present in a water.

Flocculant settling

แปลว่า(Environmental Engineering) Settling in which particle concentrations are sufficiently high that particle agglomeration occurs. This results in a reduction in the number of particles and an increase in average particle mass. As agglomeration occurs higher settling velocities result.

Limnology

แปลว่า(Environmental Engineering) The study of freshwater ecosystems.

Phototroph

แปลว่า(Environmental Engineering) Organisms which obtain energy from light using photooxidation.

Biofilm

แปลว่า(Environmental Engineering) A film of microorganisms attached to a surface, such as that on a trickling filter, rotating biological contactor, or rocks in natural streams.