Activated sludge filterability and full-scale membrane bioreactor operation

Despite continuous developments in the field of MBR technology, membrane fouling together with the associated energy demand and related costs issues remain major challenges. The efficiency of the filtration process in an MBR is governed by the activated sludge filterability, which is still limitedly understood and is determined by the...

Filterability and Sludge Concentration in Membrane Bioreactors

The Thesis entitled “Filterability and Sludge Concentration in Membrane Bioreactors” aims at explaining the relation between Mixed Liquid Suspended Solids (MLSS) concentration, the amount of solids in the wastewater being treated, also designated as sludge, and filterability, being the ability of the sludge to be filtrated through a membrane, in...

Monitoring as a tool for the assessment of wastewater quality dynamics

The wastewater system in the Netherlands comprises approximately 100,000 km of sewer pipes and more than 350 wastewater treatment plants (wwtp). The system collects and treats the majority of domestic and industrial wastewater. A small amount of untreated wastewater, however, is occasionally discharged to rivers and lakes, often resulting in a...

The applicability of the SUR measurement for ultrafiltration of WWTP effluent

Reaching ultra low phosphorus concentrations by filtration techniques

This research deals with tertiary treatment techniques used for the removal of phosphorus from wastewater treatment plant (WWTP) effluent. The main objective of this research is to obtain ultra low total phosphorus (<0.15 mg total phosphorus/L) concentrations by coagulation, flocculation and filtration of wastewater treatment plant effluent....

Filterability Assessment of Membrane Bioreactors at European Scale

The Delft Filtration Characterisation method: Assessing membrane bioreactor activated sludge filterability

Clean water is becoming a scarce resource. As a consequence reclaimed wastewater can be an attractive alternative to replace existing water resources for non-potable reuse options. In order to achieve this goal advanced treatment technologies are required. An example of such technology is the membrane bioreactor (MBR) process. In the MBR process...

Crossflow ultrafiltration of raw municipal wastewater: Investigations using PVDF tubular membranes

In the usual wastewater treatment schemes the application of membranes follows a biological process. However, ultrafiltration of untreated wastewater produces permeate free of particles and bacteria in one single step and could represent the starting point for new water-reuse concepts. This thesis focuses on crossflow ultrafiltration of raw...

Filtration characteristics in membrane bioreactors

Causes of and remedies for membrane fouling in Membrane Bioreactors for wastewater treatment are only poorly understood and described in scientific literature. A Filtration Characterisation Installation and a measurement protocol were developed with the aim of a) unequivocally determination and quantification of the filterability of an activated...

Foulants in ultrafiltration of wwtp effluent

Water is the basic element for all living organisms on earth. Moreover, water fulls a large number of different functions for human activities such as drinking water, in households, agriculture, industrial applications and transport. The latter also refers to transport our waste to treatment plants. This wastewater is mechanically and...

Interactions within wastewater systems

Wastewater systems consist of sewer systems and wastewater treatment works. As the performance of a wastewater treatment plant is affected by the characteristics, i.e. operation and design, of the contributing sewer systems, knowledge of the interactions between sewers and wastewater treatment works is very important when trying to understand...

Filtration characteristics in dead-end ultrafiltration of wwtp-effluent

With a growing need for water for many purposes on one side and an increasing degree of wastewater treatment producing water with an improved quality on the other side, the necessity of water reuse will grow, especially in highly industrialised countries with restricted natural water sources. Improvement of advanced treatment schemes for...

Scenario Studies into Advanced Particle Removal in the Physical-Chemical Pre-treatment of Wastewater

The research dealt with in this dissertation had the objective identifying the specific roles of particulate matter in wastewater influent and its inherent characteristics. In addition, advanced particle removal techniques for the development of more sustainable treatment scenarios based on physical-chemical pre-treatment of wastewater were...

Het onderzoek naar de gekombineerde behandeling van met hexacyanoferraat verontreinigd grondwater en stedelijk afvalwater