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Thickening

Thickening processes are those which concentrate the sludge by removing part of the free water, i.e. the water not associated with the sludge particles or flocs. In doing so, the finished product retains the liquid, free-flowing characteristics of the feed sludge, so that it can still be conveyed by pumping. Thickening normally increases the dry solids (DS) content to between 4 and 6%.

Thickening related videos

Solid bowl centrifuge decanting centrifuge, Alfa Laval Source: Alfa Laval / YouTube

Solid bowl centrifuge decanting centrifuge, Alfa Laval

Alfa Laval's solid bowl decanting centrifuge for sludge thickening and dewatering in wastewater treatment.

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Thickening features and blogs

HTC/AD integration flowsheet
Feature

Co-processing of sewage digestate by hydrothermal carbonisation

Hydrothermal carbonisation (HTC) can be used to co-process anaerobic digestion (AD) digestate and lignocellulosic (or plant-based) feedstocks to improve the the hydrochar product quality. This AD waste co-processing route has been studied at bench scale. Read article

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