Jun 22, 2020 · Some key sludge processing methods are intended to stabilise the sludge. Sludge stabilisation processes are those which reduce/eliminate its odour, putrescence (i.e. it’s tendency to decay) and its pathogenic (disease-causing) micro-organism content.

Sludge treatment in water/wastewater. From ‘what is sludge’ & ‘what is anaerobic digestion’ to overviews of sludge processes & in-depth technical articles

Jun 22, 2020 · Regardless of its origins, sludge contains water, dissolved organic and inorganic materials and suspended solids. The suspended solids normally make up 2−5% of the sludge for municipal wastewater sludge. Sludge water concentration. A key part of sludge treatment is the reduction of its volume by reducing the water content.

Sludge processing: the basics. An introduction to sludge treatment − Simon Judd gives a brief overview to sludge processing in the context of wastewater treatment.

Jun 18, 2020 · Characteristics of dewatered sludge. Dewatering processes can potentially remove both the free water and a proportion of the interstitial (or floc) water. The dewatered sludge, or cake, %DS content can range from 13−46% depending on the feed sludge characteristics and the dewatering technology employed (Table 1). At such high DS ...

May 8, 2020 · The micro-organisms in the sludge convert the organic material to carbon dioxide and water, and the ammonia and amino species to nitrate. Aerobic digestion resembles the conventional activated sludge (CAS) process (see video below) but excludes a wastewater feed and employs longer solids retention times.

May 8, 2020 · Anaerobic digestion (AD) is the most extensively employed sludge stabilisation process. AD stabilises the sludge biologically in the absence of air. In doing so, it reduces the amount of volatile solids by their conversion to a biogas (methane CH 4 , carbon dioxide CO 2 and water H 2 O).

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 …

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.

Jun 18, 2020 · Sedimentation, or settling, is the simplest of the thickening processes. A gravity sludge thickener has the same design features as a primary sedimentation tank used for wastewater treatment, and most often has cylindrical geometry.