Application of Biosensor in wastewater treatment

By : NURUL NAJWA BTE MUSTAFA

SA10100

Biosensoro Defined as sensors that allow the

measurement and interpretation of the biological response of activated sludge to a known disturbance.

o Which converts a biological response into an electrical signal

o Detects, records and transmit information regarding a physiological change or process

o Determines the presence and concentration of a specific substance in any test solution.

Purpose

• To obtain specific information about one or several activated sludge processes.

• This information can serve as plant performance indicators.

• Most often in the form of a substrate addition :i. organic carbon, ii.nitrogen, iii.mixtures, iv.wastewater

a – Bio-element b – Transducerc – Amplifierd – Processor e – Display

Working principle

Application• The application of biosensor in

wastewater treatment described about removal of COD and N removal processes

• Divided into two direction :i. On-line sensors - To obtain information about

wastewater treatment plantii. More advanced dynamic models - To simulate COD and N

removal in activated sludge.

Respirometer

Advantages• Small volume• Ease from construction• Ability to be used at low pO2

values• The ability to rapidly change the

composition of the buffer in which tissue slices are suspended.

Conclusions• Full understanding of the

complicated biological interactions in a wastewater treatment plant is essential to optimize treatment plant operation, aiming at reaching a good effluent quality against minimum cost.• Application of “biosensors” is

essential in the frame of these evolutions.