Solids are prepared for incineration or can be bagged for land disposal
Solids are prepared for incineration or can be bagged for land disposal

Solids Handling

All wastewater treatment systems produce solids, either from biological treatment (particulate bacteria generated from biological activity) or non-biological treatment (unoxidized organic and non-organic components of the wastewater).

In order to process solids removed from influent grey water and black water, Hydroxyl CleanSea® integrates with a solids management system. Solids are effectively removed from the black and grey water liquid streams by the primary filter, ActiveFloat™ dissolved air flotation (DAF) equipment, and via tertiary filtration processes.

Sludge delivered to solids handling processes consists predominantly of primary sludge removed from influent grey water and black water during Primary Solids Removal.

A low percentage of sludge delivered to solids handling is removed via ActiveFloat™ DAF equipment and Tertiary Filtration processes. This sludge is predominantly from total suspended solids (TSS) generated in the ActiveCell™ biological process. Sludge removed after the biological process is easily condensable as the particulate bacteria is of a young age, and the ActiveCell process does not incorporate a return activated sludge (RAS) line, unlike other processes.

As a result, during solids handling processes, the dewatering stage produces a sludge cake suitable for drying to <80% dry weight. The sludge dryer produces powder-like solids that are fully burnable and can be incinerated in the existing ship incinerators or bagged for safe shore disposal.

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