Calcification resistance control method and system for anaerobic treatment of high-calcium organic wastewater

Abstract

The invention discloses a calcification resistance control method and system for anaerobic treatment of high-calcium organic wastewater. The method comprises wastewater pretreatment, anaerobic treatment, and calcification sludge circulation separation, wherein the wastewater pretreatment is to determine pH and a calcium ion concentration of the high-calcium organic wastewater to be treated, and add a corresponding mixed buffer system to pretreat the high-calcium organic wastewater. The method realizes strengthening of the pH buffering capacity of inlet water through the pretreatment of the front end, nutrient elements necessary for growth of microorganisms are provided, and calcium ions and anions such as carbonate and phosphate are prevented from forming scales. A continuous operation sludge circulation separation system is constructed, the circulation contact of sludge and sewage and separation of calcium sludge in the system are strengthened, and the calcification problem in the process of anaerobic treatment of high-calcium and high-concentration organic wastewater is solved from the perspective of continuous prevention and continuous separation.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a calcification resistance control method and system for anaerobic treatment of high-calcium organic wastewater. Background technique [0002] The third-generation anaerobic reactor represented by UMAR, IC, and EGSB has the characteristics of high operating load, good purification effect, small footprint, good mud-water separation, and strong load impact resistance due to the use of anaerobic granular sludge. It is widely used in the treatment of various high-concentration organic wastewater. Among them, the anaerobic reactor represented by IC, in order to ensure a good pollutant removal rate and a good mud-water separation effect, achieves efficient solid-liquid-vapor separation by setting up multi-layer, multi-stage three-phase separators, which leads to its cost And the installation cost is high; and limited by the layout of the separator, the effective volume inside...

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Problems solved by technology

Among them, the anaerobic reactor represented by IC, in order to ensure a good pollutant removal rate and a good mud-water separation effect, achieves efficient solid-liquid-vapor separation by setting up multi-layer, multi-stage three-phase separators, which leads to its cost And the installation cost is high; and limited by the layout of the separator, the effective volume inside the reactor can only reach half of the total volume; and as these reactors gradually expand their application in the treatment of citric acid wastewater and recycled paper production wastewater, they are subject to The impact of high calcium concentration characteristics in incoming water and the impact of calcification in the anaerobic system on the operation of the equipment are gradually revealed, mainly manifested in the following three categories. The first category is the increase of calcified sand particles in the sludge; the second category is the pipeline Scaling and clogging; the third type is calcification of sludge particles and reduced activity

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