Method for determining MLSS in high salinity biochemical system

Abstract

The invention relates to a method for determining MLSS in a high salinity biochemical system. The method is based on a gravimetric method principle, and comprises the following steps: weighing filter paper, filtering a mixed solution, drying the filter paper, weighing the filter paper, and washing off sludge intercepted on the filter paper and the surface of the filter paper by using salt-containing clear water after the filtration of the mixed solution by the filter paper. The values of the MLSS and MLVSS can be obtained through the method, and are used to calculate the values of MLVSS / MLSS and SVI. The MLSS value obtained through the improved method provided by the invention is close to a practical MLSS value, the influence of soluble inorganic salts on the MLSS determination is reduced, and convenience is provided for the standardized comparison of the MLSS, MLVSS, MLVSS / MLSS and SVI under different salinity conditions.

Description

technical field [0001] The invention belongs to the technical field of waste water biochemical treatment and relates to a method for measuring MLSS in a high-salt biochemical system to reduce the influence of high-concentration soluble inorganic salts on the MLSS measurement process and results. Background technique [0002] Activated sludge plays a major role in the degradation of organic matter in the biochemical treatment of organic wastewater. Accurate determination of the concentration of activated sludge in the biochemical system is of great significance for the design of the biochemical system and the adjustment of operating parameters. The standard determination method of activated sludge concentration is the gravimetric method, which mainly includes the steps of filter paper weighing, mixed liquid filtration, filter paper drying and weighing. However, for high-salt biochemical systems, due to the high concentration of dissolved inorganic salts, the MLSS value measur...

AI Technical Summary

Problems solved by technology

However, for high-salt biochemical systems, due to the high concentration of dissolved inorganic salts, the MLSS value measured by the standard method is on the high side; and the higher the salinity of the mixed solution, the higher the MLSS value is.

As a result, there will be deviations in the evaluation of high-salt wastewater biochemical treatment systems by using the standard gravimetric method to determine the concentration of activated sludge, which may mislead the design and operation parameter adjustment of high-salt biochemical systems