ПОКАЗНИКИ ОЧИСТКИ СТІЧНИХ ВОД В МЕМБРАННОМУ БІОЛОГІЧНОМУ РЕАКТОРІ

Abstract

Membrane bioreactor (MBR) technology, the practical application of which is growing steadily, is a combination of classical technology of biological treatment with activated sludge with a membrane system of micro- or ultrafiltration. MBR are an alternative to the widely used method of separating activated sludge from wastewater in secondary settling tanks used in traditional biological treatment systems. High values of the sludge dose in MBR (one of the key advantages of the technology) can negatively affect the productivity of the process. This is caused the fact that the high age of sludge leads to the accumulation of inert compounds due to mineralization of sludge, to increasing of susceptibility to «contamination» - the accumulation of the solids on the surface of the membranes, reducing the efficiency of aeration. The purpose of the work is to determine the indicators of wastewater treatment from organic and nitrogen-containing pollutants and indicators of oxidative-metabolic activity of the sludge in the operating industrial MBR. The research was carried out by hydrochemical analysis of wastewater during the wastewater treatment process in MBR and determination of technological and oxidative properties of activated sludge in the bioreactor. The main parameters of wastewater treatment and the condition of activated sludge in the MBR-reactor were determined. It was found that providing a satisfactory level of purification, activated sludge in MBR is deeply mineralized, has a long age and low oxidative-metabolic activity due to underload of organic matter.