Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F19%3A00006822" target="_blank" >RIV/46747885:24620/19:00006822 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s11356-019-05889-2" target="_blank" >https://link.springer.com/article/10.1007/s11356-019-05889-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11356-019-05889-2" target="_blank" >10.1007/s11356-019-05889-2</a>

Result language

angličtina

Original language name

Waste-activated sludge disruption by dry ice: bench scale study and evaluation of heat phase transformations

Original language description

The freezing process consists of dissipating heat from the product until the final temperature is lower than the temperature of crystallisation of that product. Freezing can be used for numerous applications, including for disruption of waste-activated sludge (WAS). The aim of this study was to calculate the estimated amount of heat conveyed between the solidified carbon dioxide and the WAS, in the following ratios: 0.25:1; 0.5:1; 0.75:1 and 1:1. In heat of phase transformations, dry ice sublimation, water solidification, the amount of heat transferred by other substances and heat transferred from the sludge (dry sludge) were taken into account during the process of WAS freezing. Heat changes on the surface of WAS were registered using a thermovision camera. The effectiveness of WAS disintegration was confirmed by several biochemical parameters such as soluble chemical oxygen demand (increase over 14 times), degree of disintegration (48%), proteins (increase over 5 times), carbohydrates (increase almost 7 times), RNA (increase by 2.23 mg L−1), ammonia nitrogen (increase over 23 times), phosphates (increase almost 27 times) and turbidity (increased over 7 times). It was found that dry ice pretreatment of WAS can be an intriguing alternative for the conventional methods used.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Environmental Science and Pollution Research

ISSN

0944-1344

e-ISSN

—

Volume of the periodical

26

Issue of the periodical within the volume

September

Country of publishing house

DE - GERMANY

Number of pages

12

Pages from-to

26488-26499

UT code for WoS article

000485053500005

EID of the result in the Scopus database

2-s2.0-85068829620