A1 Journal article (refereed), original research

A comprehensive evaluation method for sludge pyrolysis and adsorption process in the treatment of coking wastewater


Publication Details
Authors: Zhou Hongtao, Wei Chaohai, Zhang Fengzhen, Hu Yun, Wu Haizhen, Kraslawski Andrzej
Publisher: Elsevier
Publication year: 2019
Language: English
Related Journal or Series Information: Journal of Environmental Management
Volume number: 235
Start page: 423
End page: 431
Number of pages: 9
ISSN: 0301-4797
eISSN: 1095-8630
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract


This study proposes a new evaluation method based on expert scoring and data
normalization to optimize operational conditions of
sludge pyrolysis and assess the comprehensive
benefits of the adsorption process in coking wastewater treatment. Pyrolysis temperature, holding time and heating rate were considered
as the experimental parameters in sludge pyrolysis. They were optimized by the
proposed method, considering raw material cost, net energy consumption, carbon emission and adsorption capacity of
sludge-derived bio-char (SB). Two operational modes (cyclic centralized and
traditional distributed) were compared to identify a better solution for coking
wastewater treatment. The results showed that the optimized operational
conditions of coking sludge pyrolysis were that temperature of 550 °C, holding
time of 60 min and heating rate of 20 °C/min, using the proposed
method. Cyclic centralized mode has been demonstrated as the better mode for
wastewater treatment by the proposed method, due to the higher comprehensive
score of −0.296. It is a promising technology for sustainable wastewater
treatment in terms of sludge recycling, energy saving and carbon
emission reduction.


Last updated on 2019-01-02 at 14:55