Analysis and modelling of predation on biofilm activated sludge process: Influence on microbial distribution, sludge production and nutrient dosage.

Abstract:

:The influence of predation on the biofilm activated sludge (BAS) process is studied using a unified model that incorporates hydrolysis and predation phenomena into the two stages of the BAS system: moving bed biofilm reactor pre-treatment (bacterial-predator stage) and activated sludge (predator stage). The unified model adequately describes the experimental results obtained in a cellulose and viscose full-scale wastewater plant and has been used to evaluate the role and contribution of predator microorganisms towards removal of COD, nutrient requirements, sludge production and microbial distribution. The results indicate that predation is the main factor responsible for the reduction of both nutrient requirements and sludge production. Furthermore, increasing the sludge retention time (SRT) does not influence the total biomass content in the AS reactor of a BAS process in two different industrial wastewater treatments.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Revilla M,Galán B,Viguri JR

doi

10.1016/j.biortech.2016.08.107

subject

Has Abstract

pub_date

2016-11-01 00:00:00

pages

572-583

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(16)31245-7

journal_volume

220

pub_type

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