Historically, human wastewater was treated like animal waste, directed to large water meadows on farmland which served as purification plants.

However, when volumes became unsustainable for agriculture, universities designed and introduced artificial systems that reproduce nature’s biological self-purification mechanisms in a more concentrated manner using forced oxygenation.

Sanitary engineering has a millennial history that the Romans developed and disseminated throughout Europe.

Engineering works like aqueducts, sewers, baths, etc. still exist today.

Today, the following technologies are available:

CAS Conventional Active Sludge

This is the basic aerobic biological process discovered in the early 20th century.

MBR Membrane Bio Reactor

This is the system applied to CAS systems that uses membranes to separate sludge from water. So, it is a system based on ultrafiltration or tangential filtration.

MBBR Moving Bed Biofilm Reactors

This, too, is an improvement of old CAS systems using submerged bodies in the active sludge; a result is obtained with both suspended biomass (CAS) and biomass applied on the fill media.

MABR Membrane Aerated Biofilm Reactors

Instead of filtering biological sludge through membranes, MABR systems diffuse air through the membranes on which the sludge deposits.

Phosphorus recovery

Sewage sludge collects all the compounds extracted from water; phosphorus is one of those that the market requires most.
Struvite (a phosphorus-based fertilizer product) production is a feasible process using sewage sludge.

BiFiPro ® Legionella disinfection

There are many systems for disinfecting primary and secondary waters. However, the system used by Holland Water stands out for its reliability and for the technology applied that can be controlled remotely in real time.

BioWin ® water treatments modeling

Mathematical modelling software with more than 200 algorithms for cleaning processes. It allows designers to correctly size plants and managers to predict the process performance based on possible disruptive variables of the process.

How do you start up a biological purification plant?

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