Faculty of EngineeringDepartment of Civil and Environmental Engineering

Environmental Engineering-CVLE-354

Advanced Wastewater TreatmentPhoshorus Removal from Wastewater

Submitted by:Name ID# Seat#

Walid Soboh 201303257 B111 Amin Nofal 201301692 A44

Mohammad Hussein 201301133 B65Husein Al-Moued 201301720 B22

Mohammed Al-Madad

201300546 A7

Abstract• The motivation behind this report is to give an outline of

distinctive strategies for phosphorus expulsion from city wastewater.

• The essential evacuation instruments, methodology plans and treatment results are depicted. In the report, a recorded foundation is likewise given of phosphorus evacuation systems and patterns in exploration and procedure outline.

• Phosphorus may turn into a restricting substance later on and phosphorus spillage from stores may be a diffusive phosphorus source. This has prompted an expanded enthusiasm for phosphorus recuperation and reuse.

Table of Contents• Cover page…………………………………………………………………………page1• Abstract………………………………………………………………………….….page2• Table of Contents …………………………………………………….………..page3• Introduction ……………………………………………………..……………….page4• Description……………………………………………………………………..….page5 Phosphorous expulsion from wastewater ………………..….........page6 Phosphorus in wastewater……………..........……………………..page7 Phosphorous evacuation forms……………………......…………..page8 Phosphate Precipitation ………………………………………...page9&10 Method……………………………………………………………………..………….….page11 Figure……………………………………………………………………………….......……page12

• Current Status in Lebanon ………………………………………..…pages 13&14• Conclusion ………………………………………………………………..……..page15

Introduction:

The subject of this presentation is the evacuation of phosphorus from wastewater on the grounds that in created areas the real phosphorus include on accepting waters originates from metropolitan wastewater various compendia, survey papers and conditions of-expressions on phosphorus evacuation in, different perspectives have been distributed before (Nesbitt 1966, Convey 1970, Jenkins et al. 1971, Hultman 1980, Marshal 1990, Sedlak 1991, Randall et al. 1992, Barker and Dold 1996#degaard 1993, Henze et al. 1995) and on substance precipitation (Hahn 1987, Hultman and Balmer 1988, Henze et al 1995).

Description of the Problem of the Phosphorus Removal From Wastewater :

• Phosphorous expulsion from wastewater • Phosphorus in wastewater • Phosphorous evacuation forms• Phosphate Precipitation • Methods of treatment

Phosphorous expulsion from wastewater

• Controlling phosphorous released from civil and modern wastewater treatment plants is a key calculate avoiding eutrophication of surface waters.

• Its vicinity causes numerous water quality issues including expanded sanitization expenses, diminished recreational and preservation estimation of an impoundments, loss of animals and the conceivable deadly impact of algal poisons on drinking water.

• Phosphate evacuation is at present attained to a great extent by substance precipitation, which is extravagant and causes an increment of slop volume by up to an option is the natural phosphate evacuation (BPR 40%).

Phosphorus in wastewater

• Civil wastewaters may contain from 5 to 20 mg/l of aggregate phosphorous, of which 1-5 mg/l is natural and the rest in inorganic.

• The standard manifestations of phosphorous found in fluid arrangements include:

• Orthophosphates: accessible for organic digestion system without further breakdown

• Polyphosphates: atoms with 2 or more phosphorous particles, oxygen and now and again hydrogen molecules join in a complex particle.

Phosphorous evacuation forms

The expulsion of phosphorous from wastewater includes the fuse of phosphate into TSS and the consequent expulsion from these solids. Phosphorous can be joined into either organic solids (e.g. micro creatures) or concoction hastens.

Phosphate Precipitation Concoction precipitation is utilized to evacuate the inorganic manifestations of phosphate by the expansion of a coagulant and a blending of wastewater and coagulant. The multivalent metal particles most regularly utilized are calcium, aluminum and iron.

Ferric particles consolidate to frame ferric phosphate. They respond gradually with the regular alkalinity thus a coagulant help, for example, lime, and is regularly add to bring the pH up keeping in mind the end goal to improve the coagulation.

Methods

• The primary phosphate evacuation methodologies are (see picture beneath):

• Treatment of crude/essential wastewater • Treatment of last emanating of organic plants

(post precipitation)• Treatment contemporary to the optional

biologic response (co-precipitation).

Current Status in Lebanon :Organic phosphorus evacuation depends on phosphorus uptake by oxygen consuming heterotrophs equipped for putting away orthophosphate in abundance of their natural development prerequisites.

Under ensuing high-impact conditions in the treatment process, PAOs utilize the put away PHAs as vitality to take up the phosphorus that was discharged in the anaerobic zone, and in addition any extra phosphate display in the wastewater.

Phosphorus can likewise be expelled from wastewater through substance precipitation.

These flocks are then settled out to expel phosphorus from the wastewater.

Zahle wastewater treatment plant was composed utilizing this innovation to accomplish organic phosphorus evacuation, where the principle playing point of this methodology is the huge lessening of reagent utilization.

As the natural phosphorus evacuation proficiency depends specifically on surplus biomass generation, essential sedimentation is not gave upstream of the anaerobic tanks.

Conclusion:Main sources of phosphorus compounds in sewage come from human excreta and detergents.

A minor part of phosphorus in municipal wastewater is due to food additives, corrosion inhibitors, and industrial sources.

Application of chemical precipitation for phosphorus removal started around 1960 and chemical precipitation with the use of aluminum and iron salts and lime was the chosen technology.

Chemical precipitation is today a well established technology for phosphorus removal from municipal wastewaters..