PLANT DESIGN PROJECT - RESOURCE RECOVERY FROM WASTEWATER TREATMENT PLANT INTO VALUE ADDED PRODUCTS

Acknowledgement

I would like to give credit and expression of gratitute to Ikmal Haziq, Lee Zee Khai, Amira Masturina and Nur Amieza for completing this plant design project together. Not to forget our supervisor, Dr. Noorfidza Yub Harun

Case Study

To put short, this project is about the feasibility of recovering materials from the wastewater and process it into value-added product. Apart from that. each members were assigned to design a major equipment involved in the plant design

Plant Design

Resource we want to recover

• Methane from wastewater sludge through anaerobic digestion

• Bio-oil and char from pyrolysis of sludge

Simulation Snippet

For this project, we used Aspen HYSYS for chemical plant simulation and CapdetWorks for wastewater treatment plant simulation and economic estimation. Note that simulation of wastewater in HYSYS (shown below) use multiple hypothethical component to simulate wastewater components

Simulated Wastewater Treatment Plant

The sludge from the wastewater treatment plant goes either pyrlolysis reactor or anaerobic digestor. Pyrolysis process breaks down dried sludge to release gases and char. The gas were then condensed into bio-oil

Simulated Pyrolysis System

Simulated Anaerobic System

Plant Design

Design of Major Equipment (Dissolved Air Flotation)

Basis of Selection

Technical Drawings

Data Sheet

Economic Analysis

Preliminary Wastewater Treatment Plant Economic Analysis

The estimated cost and the wastewater design were done in CapdetWorks

Economic Assumptions

• 3 years of construction, 15 years of operation

• 24/7 operation all year​

• Constant annual revenue​

• OPEX increment +5%/year​

• Income Tax = 24% Net Profit

Capital Expenditure

Operating Expenditure

Economics Evaluation