Pathogen Content of Sewage Sludge Mitigation. Requirement for Agricultural Valorization

Viorel Patroescu, Costel Bumbac, Cristiana Cosma, Alina Banciu, Mihai Ștefănescu and Laurențiu Dinu

Romaqua, 2016, vol. 110, issue 4, 30-35

Abstract: Among the main priorities of the EU’s strategy regarding sewage sludge, improving of treatment conditions for waste recovery is of interest. The key factors involved in production of stable biosolid (treated sewage sludge) are advanced disinfection and stabilization, prior to land application. The aerobic composting of anaerobic digested residual organic sludge from urban WWTPs ensures the transformation of waste into a valuable product, compost used as agricultural fertilizer. The biotechnological solutions set up by INCD ECOIND for the post-treatment of stabilized sludge provide high pathogens reduction (fecal Coliforms/99.9%, fecal Streptococcus/99.9%, Escherichia coli/89%) but the residual level of E.coli (over the detection limit) still arises environmental and health concerns. Application of ultrasound process as a pre-treatment step of anaerobic digestion has an important effect on the bacterial mortality, with improving in the same time of activated sludge stabilization and biogas production. Low frequency sonication, based on cavitation effects, can destroy the bacterial cell membrane of E.coli, high susceptible to this treatment. The coupling of advanced oxidation techniques based on sonolysis and ultraviolet irradiation (US/UV) is able to achieve total removal of pathogens.

Keywords: sewage; sludge; pathogens; E.coli; US/UV (search for similar items in EconPapers)
Date: 2016
References: Add references at CitEc
Citations:

There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:ris:romaqu:0070

Access Statistics for this article

Romaqua is currently edited by Eduard Stan

More articles in Romaqua from Asociatia Romana a Apei (Romanian Water Association)
Bibliographic data for series maintained by Eduard Stan ( this e-mail address is bad, please contact ).