Upgrading an anaerobic/aerobic wastewater treatment plant

Abstract

The given example of an anaerobic/aerobic wastewater treatment plant ((WWTP) for a big German brewery shows that it is possible to reduce the discharged values to a very low level, much lower than the minimum requirements of Appendix 11 of the German General Wastewater Administration Rule, which applies to breweries. This means that the present state of technology has been updated. Tests on a semi-technical scale were carried out and found to be necessary to find the most suitable design for the wastewater treatment plant. Running the tests in the brewery, it became obvious that disinfectants had to be substituted until a stable COD elimination was achieved. Full-scale tests in the plant would not have been feasible. Numerous modifications were carried out in the brewery to reduce the amount of cleaning and disinfectant agents as well as the amount of AOX, EDTA, NTA and aluminium used. The following article presents the findings of the investigations about the ammonification of organic nitrogen, bulking sludge and substrates for denitrification. Furthermore it demonstrates the low operating costs of anaerobic pre-treatment, even in combination with an aerobic stage and filtration unit.

Reaction kinetics on treatment of food industry wastewaters by electrochemical oxidation

“…This includes an eco-friendly process which is flexible enough to handle various concentration loads and changing characteristics [3]. In management practices, the processes used nowadays for treatment of whey and fruit juice wastewaters are based on biological [4][5][6][7][8][9] and/or physicochemical methods [10,11]. The reagent cost in physicochemical methods is very high and the removal of soluble COD is poor, therefore biological processes are often preferred [12].…”

Biotreatment of Industrial Wastewaters under Transient-State Conditions: Process Stability with Fluctuations of Organic Load, Substrates, Toxicants, and Environmental Parameters

“…However, the choice of chemicals used can aid in relieving the toxicity of the wastewater. 8,160 The production of fine chemicals and pharmaceuticals is dominated by batch processes, giving rise to rapid swings in the types and concentrations of organic pollutants appearing in their wastewaters. 27,69,95,202 The latter can be referred to as wastewaters containing "sequentially alternating pollutants" (SAP), with pollutant composition alternating sequentially from one set of compounds to another over cycles of weeks or months.…”