Study of nitrogen and phosphorus removal by SBR seven-step system of anoxic and aerobic and anaerobicOperation of municipal wastewater in different situations

There are more sewage pollution by organic substances Nhast.ayn by oxygenation and oxidation of the material can be converted into nitrites, nitrates, phosphates, etc. and then settle down, separated from the waste water.Generally, wastewater treatment methods can be divided into three main categories: physical, chemical and biological division is now widely Nmvd.astfadh biological methods for wastewater treatment is common.Biological methods are able to lower costs, a wide range of pollutants to be refined to remove biodegradable organic material and nutrients (nitrogen and phosphorus) are used.Activated sludge process and biological trickling filter is the most common treatment methods.The aim of this study was to evaluate the use of batch process alternating aerobic and Anoxic and anaerobic removal of nitrogen and phosphorus from a wastewater treatment plant in laboratory scale (pilot) is to determine the effect of rescheduling the anaerobic, Anoxic, aerobic performance system for the removal of nitrogen and P, change the sequence of steps and timeliness effect on the removal efficiency of nitrogen and phosphorus deals.