a new process for the treatment of recalcitrant wastewater

Un nuovo processo per il trattamento di acque reflue recalcitranti

A new process for the treatment of recalcitrant wastewater

Claudio Di Iaconi, Giuseppe MascoloCNR – Istituto di Ricerca Sulle AcqueVia F. de Blasio, 5 - 70132 Bari, Italy

IRAN: la nuova frontiera del Business, Bari (Italy), 10 Ottobre 2016

Founded in 1968 Member of the Italian National Research Council (CNR), the

largest Research Organization in Italy Highly interdisciplinary (engineers, chemists, biologists,

geologists,…) +150 Researchers, PostDoc, PhD 3.5 million € annual turnover (excluding salaries) from

external sources

IRSA – CNR (Water Research Institute - Italy)

A brief introduction about Water Research Institute of the National Research Council

Montelibretti (Rome)Aquatic Chemistry, Water and Wastewater Treatment, Water

Resources Management

Bari Water and Wastewater Treatment

Water Resources Management

Brugherio (Milan) Pollutant effects, Ecotoxicology,

Ecological classification

IRSA is organized in three branches (i.e. units or laboratories) located in Northern, Central and Southern Italy

Main Research

Areas

Water and Wastewater Treatment

Environmental

Microbiology and Ecology

Sludge and solid wastes

management

Water Quality

Aquatic ecosystems

functioning and response to

impacts

Contaminants fate and effects

Remediation of polluted aquifers

and soils

Water Resources Management

Climate change impacts on water

resources availability

River Basin Management,

irrigation, impacts from agriculture

High sludge production

Complicated treatment schemes

COMMON FEATURES OF CONVENTIONAL WASTEWATER TREATMENT PLANTS

Low effectiveness towards some pollutants Low flexibility and robustness

Unpleasant odour emission

In comparison with the conventional treatment systems, SBBGR (technology is able to:

simplify treatment scheme (in a single stage occurs the entire wastewater treatment train);

reduce area requirement (up to 50%); reduce the sludge production (up to 70%); reduce the total costs (up to 40%); treat biorefractory wastewater by integrating biological

degradation and chemical oxidation

SBBGR

SBBGR

unità tratt. fanghi

SBBGR

SBBGR

unità tratt. fanghi

The new wastewater treatment process: SBBGR (Sequencing Batch Biofilter Granular Reactor):

SBBGR: A LOW FOOT-PRINT SYSTEM

reduce the surface requirement of the treatment plant (primary and secondary units are no longer required, and sludge treatment unit is greatly reduced)

reduce the sludge production;

In comparison with the conventional treatment systems, SBBGR technology is able to:

to treat biorefractory wastewater by integrating biological degradation and chemical oxidation;

SBBGR

sludge treat. unit

sec. clarifier unit

prim

. tre

at. u

nit

The red is showing the area of the plant that will be saved by replacing the conventional biological stage (based on activated sludge process) with SBBGR technology.

inf.

PA

eff.

PR

EV

BIOMASS compartment

WASTEWATERcompartment (air)

SBBGR TECHNOLOGY

O2

high biomass concentrations (up to 50 kg/m3) high sludge age (higher than 200 d)

no secondary clarifier

granular biomass fractiongranular biomass fraction

attached biomass fractionattached biomass fraction

SBBGR TECHNOLOGY

How does SBBGR work?

air (or no air)

recycle

filling

reaction

drawing

eff

EV

inf

cycle

air (or no air)

recycle

filling

reaction

drawing

eff

EV

inf

cycle

air (or no air)

recycle

filling

reaction

drawing

eff

EV

inf

cyclecycle

SBBGR TECHNOLOGY

Chemically enhanced SBBGR with ozone

Chemically enhanced SBBGR with ultraviolet (UV) light

Chemically enhanced SBBGR

Textile wastewater

Tannery wastewater

Landfill leachates

Pharmaceutical wastewater

Applications of the process

before

before

before

before

after

after

after

after