Fish canning industry wastewater variability assessment using multivariate statistical methods

Abstract

Fish canning wastewaterWastewater variability Principal component analysis Cluster analysis Correlation analysisMultivariate statistical methods a b s t r a c t Usually, fish canning industrial wastewaters have a highly variable composition over time.For a good performance of treatment processes it is necessary to limit that variation.However, extended wastewater monitoring, including all relevant analytical parameters, is expensive. This work proposes an efficient approach to minimize the analytical determinations number without compromising the global characterization goal. This way, fish canning industry wastewaters variability was assessed and interpreted through multivariate statistical tools application to analytical data obtained from a monitoring program carried out in a fish canning industry of northern Portugal. 23 physicochemical parameters were determined in 20 samples collected on an 8 months period. The results achieved by correlation analysis, principal component analysis (PCA) and cluster analysis (CA) led to the main water pollution sources identification and to the minimization of physical and chemical parameters number to be analyzed in order to achieve a correct wastewater characterization, at minimum cost. The main pollution sources proved to be the brine and eviscerating step waters.Dissolved organic carbon (DOC), total suspended solids (TSS), conductivity, pH, Ca 2+ , F − and one of the parameters SO 4 2 , NO 3 − and PO 4 3− were identified as important parameters that must be monitored in order to obtain an accurate characterization allowing to define the most appropriate wastewater treatment.

Recovery of Polyhydroxyalkanoates from Cooked Mussel Processing Wastewater at High Salinity and Acidic Conditions

“…Depending on the processed fish product (tuna, mussels, etc.) and seasonal variations, the generated waste streams show different compositions [1,2]. In fact, effluents with distinct qualities and flows may be produced even in the same facility, depending on the processing steps, challenging its adequate treatment [3,4].…”

“…In fact, effluents with distinct qualities and flows may be produced even in the same facility, depending on the processing steps, challenging its adequate treatment [3,4]. The high loaded wastewaters generated in these facilities often contain chemical oxygen demand (COD) concentrations up to 42 g COD/L characterized by its high complexity with not only easily-biodegradable carbohydrates but also relevant protein fractions (15-20% of wet weight), and lipids (0.1-44 g/L) [2,5].…”

Monitoring of wastewater quality in Lodz sewage system (Poland)—do the current solutions enable the protection of WWTP and receiving water?

“…The obtained results are only partially consistent with the results of Principal Component Analysis, which not identify exactly the same grouping. The statistical methods used in this research generally were, according to other authors, more useful in the analysis of the composition of wastewater in industry, WWTPs, and in the selection of optimal solutions in the wastewater management [49,54,55]. The use of this type of analysis as tools useful in wastewater management for a large city would require a much wider measurement campaign, both in terms of the number of sampling points and the frequency of tests.…”

“…Two methods were used: Principal Component Analysis (PCA) and Cluster Analysis (CA). Both methods are often applied to assess the composition of water and wastewater, to establish relationships between quality parameters and to identify sources of pollution [31,[47][48][49][50][51][52]. The analysis was based on the median of quality parameters for all wastewater sampling points in dry and wet weather, and separately for dry weather only.…”

Contribution to the Physico-Chemical Characterization of the Wastewater of Four Industrial Units of Preserve and Semi Fish Preserve of the City of Anza (North of Agadir)

“…Recently, there has been an increase in the number of fish canneries around the world. Wastewater produced in this type of industry varies considerably depending on the production, the type of fish and the process used (Cristóvã o et al, 2016). The main environmental problems related to canning fish is that it consumes a lot of water and produces huge volumes of liquid effluents rich in organic matter, oil and fat and salt.…”