Seasonal changes in quality of wastewater from fruit and vegetable industry

Abstract

Abstract. The paper aimed at evaluating the seasonal changes in quality of wastewater from facilities producing fruit and vegetable juices, processed and frozen products, and vegetable concentrates. The study revealed that wastewater from fruit and vegetable industry contain large amounts of organic substances expressed as BOD5 (minimum -500 mgO2/dm 3 , maximum -6 100 mgO2/dm 3 ) and COD (minimum -806 mg O2/dm 3 , maximum -7 732 mg O2/dm 3 ), while is deficient in nitrogen and phosphorus. Considerable seasonal oscillations in sewage load disposed by industry to sewerage, were observed. An increase of 50%-60% wastewater concentrations was found between June and October in 2013-2016 as compared to the remaining months.

Recovery of High Value‐Added Nutrients from Fruit and Vegetable Industrial Wastewater

“…An investigation of 11 FVPI units was conducted, and the results showed that water consumption and wastewater generation reached 1.8 × 10 5 to 6.0 × 10 5 m 3 /year and 130 to 330 m 3 /hr, respectively (Valta et al., ). Wastewater contains large amounts of organic substances expressed as 5‐day biochemical oxygen demand (BOD 5 ) (500 to 6100 mg/L) and COD (806 to 7732 mg/L), indicating a serious environmental problem (Puchlik & Ignatowicz, ) and requiring a high cost for water treatment as shown in Table . Therefore, the removal of these bioactive substances is a challenge in the wastewater treatments.…”

The Efficiency of the Biogas Plant Operation Depending on the Substrate Used

“…Until 2015, about 1200 farms dealing with cattle breeding, 3000 farms dealing with pig breeding, and 3500 farms dealing with poultry were registered in Poland-a total of 7800 farms with livestock density above 100 LU, where biogas production is possible, technically justified, and economical [10]. It results, among others, from this branch structure in Poland that is characterized by a great degree of fragmentation [11].…”