Laundry wastewater treatment using coagulation and membrane filtration

Sonja Šostar-Turk (Author), Irena Petrinić (Author), Marjana Simonič (Author)

Abstract

This paper presents the results obtained from laundry wastewater treatment using conventional methods namely precipitation/coagulation and the flocculation process with adsorption on granular-activated carbon (GAC) and an alternative method, membrane filtrations, namely ultrafiltration (UF) and reverse osmosis (RO). Chemical analyses showed that parameter values of untreated wastewater like temperature, pH, sediment substances, total nitrogen and phosphorous, COD, BOD5, and the amount of anion surfactants had been exceeded in regard to Slovenian regulation. These regulations can be used as requirements for wastewater reuse and make treated wastewater an available source for the existing water supply. The study of conventional treatment was based on a flocculation with Al2(SO4)3 18H2O and adsorption on GAC. Membrane filtrations were studied on a pilot wastewater treatment plant: ultrafiltration (UF) and reverse osmosis (RO) units. The membranes used in this experiment were ceramic UF membrane and spiral wounded - polyethersulfone- RO membranes. The quality of the wastewater was improved by both methods and the specifications of a concentration limit for emission into water were confirmed. The disadvantage of GAC is that there is no possibility of any kind of selection, which is essential for recycling and re-use, while permeate coming from RO met the required regulation as well as requirements for reusing in washing process. However, the economical analyses showed that the membrane filtrations are more expensive compared to the GAC treatment process.

Keywords

pralnice;pranje tekstila;odpadne vode;napredne oksidacijske metode;membranske tehnologije;membranska filtracija;koagulacija;laundries;washing of textiles;waste waters;advanced oxidation processes;membrane technology;membrane filtration;coagulation;

Data

Language:	English
Year of publishing:	2005
Typology:	1.01 - Original Scientific Article
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
UDC:	677:628.3
COBISS:	9470998
ISSN:	0921-3449
Views:	2087
Downloads:	107
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary keywords:	pralnice;pranje tekstila;odpadne vode;napredne oksidacijske metode;membranske tehnologije;membranska filtracija;koagulacija;
URN:	URN:SI:UM:
Pages:	str. 185-196
Volume:	ǂVol. ǂ44
Issue:	ǂiss. ǂ2
Chronology:	May 2005
ID:	8718282