PMID: 15242115Jul 10, 2004Paper

Reject water: treating of process water in large wastewater treatment plants in Germany--a case study

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
S S Meyer, P A Wilderer

Abstract

The increase of the hydraulic loading of a municipal wastewater treatment plant caused by the sludge dewatering process is of minor importance. However, the rejected nitrogen load accounts for up to 25% of the nitrogen load in the raw sewage. As a result, the process water significantly influences the stage volume of the biological treatment steps. Rejection management can prevent critical nitrogen concentrations in the effluent of the plant. In some cases, the treating capacity must be increased. Separate treatment of the process water can be an alternative to the enlargement of the main wastewater treatment stages. This article describes the compositions of the process waters from different sludge treatment steps, the influence on the main wastewater treatment steps, possible strategies to handle the rejection problem, and processes for separate treatment of the sludge liquor. Some results of a German case study on large wastewater treatment plants illustrate the situation concerning separate process water treatment in Germany. These results suggest that side stream treatment can be a practical alternative to a classic increase in the length of the main stream stages. Moreover, they prove that many different processes are use...Continue Reading

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Water Science and Technology : a Journal of the International Association on Water Pollution Research
M C M van Loosdrecht, S Salem
Water Science and Technology : a Journal of the International Association on Water Pollution Research
Liang YuShulin Chen
© 2022 Meta ULC. All rights reserved