Cost Effective Management of Confectionery Industrial Wastewater

Abstract

The goal of this study is the management of wastewater generated from a confectionery factory located at El City, Egypt. The factory produces confectionery products, chocolates, eastern and western bakery products. Laboratory analysis of raw wastewater showed high pollution load with an average COD and BOD5 of 5396 mg/L and 2526 mg/L. Most of the organic matter was present in soluble form since TSS was 908 mg/L on average. The raw wastewater showed limited nutrients concentration with average of 55 mgTKN/L and 3.3 mgTP/L. Conventional activated sludge and UASB reactors were separately investigated as treatment technologies. Aerobic sequential batch reactor (SBR) indicated hydraulic retention time (HRT) 12 hr. to produce effluent complying w 9.3kg COD/m3.d and temperature range of 20 98% for COD, BOD5 and TSS, respectively. Two and same temperature's range, showed averages of removal of 82%, 81%, 95%, and 85% of COD, BOD, TSS and oil&grease, respectively to produce effluent complying with the regulatory standards. The activated sludge quality than the two-stage UASB reactor. However, the two effective technology for the treatment.

Methane Production from Confectionery Wastewater Treated in the Anaerobic Labyrinth-Flow Bioreactor

“…Confectionery wastewater is comprised of low nutrient concentrations (nitrogen and phosphorus compounds) at 30-120 mg N-NH 4 /L and 3.2-157 mg TP/L [2]. The confectionery sewage has a mostly acidic pH of five due to the presence of readily soluble fermentable organic compounds [8]. Moreover, washing and disinfecting substances in wastewater can cause changes in the pH values within the limits of 3.2-9.5 [2].…”

“…However, this can cause some technological problems in treatment plants and is quite expensive [11]. Thus, it is recommended to treat confectionery sewage at the place of its formation to meet standards for industrial effluent discharge into the municipal sewerage system or natural water reservoirs [8]. Both aerobic and anaerobic biological treatment systems are used to treat confectionery wastewater [1,12].…”

Application of Recycled Filling to Improve the Purification Performance of Confectionery Wastewater in a Vertical Anaerobic Labyrinth Flow Bioreactor

“…The confectionery sector, which produces various sweets, such as chocolate, pudding desserts, and baked goods, is one of the most widespread and important industries in the world [1]. This industry produces large amounts of wastewater, with high concentrations of pollutants [2]. This wastewater is heavily contaminated with organic and biogenic compounds, which pose a considerable risk to the hydrosphere, in particular [3].…”

Comparative Environmental and Economic Assessment of the Zahle Wastewater Treatment Plant in Lebanon under Different Scenarios. (c2022)

“…This was explained by the more expensive equipment needed. According to Nasr et al, (2019), the construction section made up the majority of the costs associated with implementing a WWTP. In fact, Figure 4-12 shows that the construction process played a significant part in the overall assessed costs as most of the contribution to total cost came from these expenses alone.…”