engleski

Wastewater Discharge from Fish Processing Plants in Croatia

The global increase in fish consumption tallies with trends in food consumption in general. Following this trend the global fish production has grown impressively and it is believed that the increasing trend will continue. Over 90% of fish products on the international market are traded in the processed form. Fish processing industry is one of the most important industrial sectors in Croatia. Despite this, effective regulations regarding emission limit values for wastewater (NN 087/2010) do not specify values for fish processing industry. In order to establish specific effluent values for fish processing industry and offer possible solutions for cleaner production, different parameters from monitoring reports were analyzed. Together with concentration values, also location and different ways of wastewater discharges were considered, while effective Croatian regulations were taken into account together with standards set by EU Directives (76/464/EEC, 91/271/EEC and 2000/60/EC) and international emission guidelines for the management of wastewaters from the fish processing plants. Monitoring reports from Croatian fish processing plants suggest that wastewaters have significantly high concentrations of chlorides and very high concentration of biological and chemical oxygen demand. In almost all monitoring reports values for these parameters are reported as not suitable with effective legislative limits. Due to high concentration of chlorides biological wastewater treatment is impeded, which affect discharge of these waters in collecting systems and urban wastewater treatment plants. Moreover, fish processing plants are situated on islands, in coastal and hinterland region including sensitive water protected areas, with different ways of wastewater discharges, which requires specific solutions for each one through elaboration of specific studies for every single area. Helping the fish processing facilities to meet the environmental management objectives, we suggest the reduction of chlorides in wastewaters of all plants and microzonation for determination of limit emission values.

Wastewater; Fish Processing; Legislation; Croatia.

nije evidentirano