Efficient Plants and Procedures for Wastewater Treatment

NASH Vacuum Pumps for Wastewater Treatment Plants

Many larger wastewater treatment plants use Anaerobic Digestion, a bacterial process that is carried out in the absence of oxygen. Compared to the conventional activated sludge process, Anaerobic Digestion is more energy efficient, reduces dewatered biosolids by 7-12 times (as compared to conventional processes) and produces useful methane gas (biogas). Gardner Denver Nash liquid ring pumps and...

Technology Developments for Small Wastewater Treatment Plants

INTRODUCTION Small wastewater treatment plants (SWTP) are here defined as plants with a size less than about 2000 p.e., or with a daily load less than 1000 m/d and 200 kg BOD/d. There are, however, no such exact limits in reality. Therefore, plants up to 5000 p.e. are some times included. The interesting thing is that several practical conditions are more or less of the same type for this class...

“ New challenges for small wastewater treatment plants ”

INTRODUCTION Safe wastewater treatment methods have always been a challenge to the society. During the last 50 years, pollution abatement measures have been given high priority, particularly discharges from the growing urban areas. Early objectives were to reduce the emissions of organic matter and pathogens, while other objectives related to the emission of heavy metals and nutrients (phosphor...

Experimental Protocol for Detecting SARS-CoV-2 in Screenings and Grit Samples of Wastewater Treatment Plants

Introduction: Although various liquid, solid, and gaseous streams of wastewater treatment plants (WWTPs) have been analyzed in many studies for the presence of SARS-CoV-2 RNA, no study was found to sample and detect SARS-CoV-2 RNA in screenings and grit samples separated from primary treatment units of WWTP. Hence, this study aims to provide an experimental protocol for sampling and extracting ...

Title Perfluorochemicals in wastewater treatment plants