Investigation on Combustion Characteristics of Malaysian Domestic Wastewater Sludge

Journal of applied sciences research

article

Suhaimi Hassan¹  Safuan Zakaria¹  Michael Lo Yin Kai¹  M.Faizairi M.Nor¹ 

[1] Department of Mechanical Engineering, University of Technology PETRONAS

关键词: domestic wastewater sludge;    combustion characteristics;    thermal behaviour;    TGA;   

DOI  :  10.22587/jasr.2019.15.4.1

学科分类：社会科学、人文和艺术（综合）

来源: AENSI

【 摘 要 】

Domestic wastewater sludge (DWS) is a great source of biomass energy as it is abundant and contain high organic materials to be converted to fuel. This research is aimed to study the combustion characteristics of dried Malaysian DWS through proximate analysis, ultimate analysis and bomb calorimetry, and thermal behaviour of DWS through combustion by thermogravimetric analysis (TGA) at different heating rates of 10 K/min, 20 K/min and 30 K/min under constant flowrate of oxygen (20 mL/min) from room temperature to 850 °C. This research will evaluate potential of Malaysian DWS as biomass fuel by comparing its characteristic with other DWS and selected biomass. DWS sourced from UTP Sewage Treatment Plant is used for the study. From proximate analysis, the physical characteristic of UTP DWS has moisture content of 10.61 wt%, volatile matter of 39.84 wt%, fixed carbon of 18.61 wt% and ash content of 30.94 wt%. From ultimate analysis, the chemical characteristic of UTP DWS has carbon of 36.06 wt%, hydrogen of 5.28 wt%, nitrogen of 10.48 wt% and sulphur of 5.04 wt%. UTP DWS has calorific value of 13 MJ/kg. The characteristics of UTP DWS are comparable with other DWS except for nitrogen and sulphur content. The thermal profiles are presented in thermogravimetric (TG) curve and derivative thermogravimetric (dTG) curve, the curves depicted 3 stages of combustion process where combustion is most reactive in combustion of fixed carbon. The combustion reactivity is highest at heating rates of 30 K/min. The ignition temperature of UTP DWS is at 230°C and burnout temperature at 600°C. The burning time decreased significantly when heating rates increased.

【 授权许可】

Unknown