Modelling the exothermic heat and the demand of cooling in paper and pulp industry biological wastewater treatment
Shah, Dipal Kumarpal (2016)
Diplomityö
Shah, Dipal Kumarpal
2016
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe201604199994
https://urn.fi/URN:NBN:fi-fe201604199994
Tiivistelmä
This master thesis presents a study on the requisite cooling of an activated sludge
process in paper and pulp industry. The energy consumption of paper and pulp
industry and it’s wastewater treatment plant in particular is relatively high. It is
therefore useful to understand the wastewater treatment process of such industries.
The activated sludge process is a biological mechanism which degrades carbonaceous
compounds that are present in waste. The modified activated sludge model
constructed here aims to imitate the bio-kinetics of an activated sludge process.
However, due to the complicated non-linear behavior of the biological process, modelling
this system is laborious and intriguing. We attempt to find a system solution
first using steady-state modelling of Activated Sludge Model number 1 (ASM1), approached
by Euler’s method and an ordinary differential equation solver. Furthermore,
an enthalpy study of paper and pulp industry’s vital pollutants was carried
out and applied to revise the temperature shift over a period of time to formulate
the operation of cooling water. This finding will lead to a forecast of the plant
process execution in a cost-effective manner and management of effluent efficiency.
The final stage of the thesis was achieved by optimizing the steady state of ASM1.
process in paper and pulp industry. The energy consumption of paper and pulp
industry and it’s wastewater treatment plant in particular is relatively high. It is
therefore useful to understand the wastewater treatment process of such industries.
The activated sludge process is a biological mechanism which degrades carbonaceous
compounds that are present in waste. The modified activated sludge model
constructed here aims to imitate the bio-kinetics of an activated sludge process.
However, due to the complicated non-linear behavior of the biological process, modelling
this system is laborious and intriguing. We attempt to find a system solution
first using steady-state modelling of Activated Sludge Model number 1 (ASM1), approached
by Euler’s method and an ordinary differential equation solver. Furthermore,
an enthalpy study of paper and pulp industry’s vital pollutants was carried
out and applied to revise the temperature shift over a period of time to formulate
the operation of cooling water. This finding will lead to a forecast of the plant
process execution in a cost-effective manner and management of effluent efficiency.
The final stage of the thesis was achieved by optimizing the steady state of ASM1.