15.2 Photobiological Agents and Methods Used in PhotoBiological Reactors

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Wastewater (industrial

and domestic)

Primary treatment

Secondary treatment

Adsorption

Sludge

Sampling

Hazardous and nonhazardous

waste

Treatment alternatives

Physical–chemical

treatment

Biological treatment

Thermal treatment

Final treatment

Figure 15.1

Sludge management in wastewater treatment.

K2O, 2 kg of P2O5, and 0.5 kg of MgO/ton. Phenolic and toxic nature of the waste

stops its extensive disposal on agricultural land. Rock phosphate (RP) added to fer-

mentation medium helps in OMW-based fertilizer making. A study conducted using

an acid-producing filamentous fungus, Aspergillus niger NB2, displayed advanced

progress of the immobilized mycelium and substantial reduction of the total phenols

when the waste material was supplemented with RP and ammonium sulfate (N).

The immobilized fungus solubilized the RP with all-out level of soluble P of 0–58 g/l

grasped during the fourth batch cycle of the OMW + RP treatment. The OMW + N