Biological and chemical treatments enhance the quality of wastewater from a potato chips factor

Abstract

Wastewater discharge contains a high level of contaminants that require sufficienttreatment for further reuse and legitimate applications. This study examined the effect ofseasonal variations on treatment performance, and data was generated at duration of oneyear on a monthly basis. Generally, physicochemical and microbial parameters in thewastewater retain better performance in spring and autumn than summer and winter. In thiswork Pseudomonas putida was isolated, identified, examined for its role in biodegradationof organic matter and wastewater treatment and the isolate showed potential to improve theBOD, COD, TSS. The results indicated that the treatment of wastewater for effluent was atacceptable level according to national regulations. The range of parameters of treatedeffluent during Autumn and Spring is better than Summer and Winter. The highest BODafter chemical treatment (DAF) was recorded during Spring which also gives the highestratio after Chemical treatment (DAF) and after biological treatment (Effluent). The highestCOD after Chemical treatment (DAF) was recorded during Spring which also gives thehighest ratio after Chemical treatment (DAF)/ after biological treatment (Effluent). CODand BOD values were significantly different among Autumn, Spring and Winter as the Pvalue < 0.05. Total Suspended solids (TSS) results indicated that the Effluent highest valueswere during Summer. While the Effluent lowest values of regional average were scoredduring Spring. Volatile Suspended Solids (VSS) results indicated that the DAF highestvalues were during Autumn. While the DAF lowest values were scored during Spring. TheEffluent lowest Total phosphorous value was during Autumn. The Effluent lowest Oil &grease values were during Autumn. The Effluent lowest values of Settleable solids wereduring Spring. The Highest log10 number of total bacterial count and bacterial count bymembrane filter methods were recorded in the sequencing batch reactor tank (SBR)(Aeration tank) after chemical treatment and this stage is considered the reactions phase ofbacterial biological treatment.