Efficient pre-concentration system suitable for sludge storage tank

Abstract

The invention provides a high-efficiency pre-concentration system suitable for a sludge storage tank, which comprises a floating adjustment type supernatant discharge device arranged on the upper part in a lifting manner, a residual sludge flocculation water distribution pipe and a chemical sludge water distribution pipe arranged in the middle, and a perforated sludge collection pipe arranged at the bottom, a horizontal stirring grid is also connected to the lower part of the floating adjustment type supernate discharge device, and is positioned below the residual sludge flocculation water distribution pipe and the chemical sludge water distribution pipe and above the perforated sludge collection pipe. Sludge reduction can be effectively achieved, and the treatment capacity of a sludge thickening and dewatering system is improved.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a high-efficiency pre-concentration system suitable for sludge storage tank reconstruction or design optimization. Background technique [0002] Secondary biological treatment and advanced treatment of chemical phosphorus removal in sewage treatment plants will produce excess sludge and chemical sludge. The excess sludge and chemical sludge are mostly discharged into the sludge storage tank in the form of intermittent discharge, and the temporary storage and adjustment of the sludge storage tank can ensure the stable operation of the subsequent sludge pump and sludge concentration and dewatering system. [0003] Generally, perforated aeration pipes or submersible mixers are installed in the sludge storage tank to keep the sludge mixed evenly and avoid sludge deposition. The sludge moisture content is about 99.2%, and the moisture content is high. The amount ...

AI Technical Summary

Problems solved by technology

The moisture content of the sludge is about 99.2%, and the moisture content is relatively high. The amount of sludge entering the sludge concentration and dewatering system is large, and the operating time of the sludge concentration and dehydration machine is relatively long, and even the dewatered sludge after treatment is difficult to reach below 80%. Moisture content requirements

And for the built underground (sinking) sewage treatment plant, it is difficult to realize the expansion of the sludge system

[0004] The anaerobic environment is easy to be generated in the sludge storage tank, which leads to the release of phosphorus in the phosphorus-rich excess sludge. The filtrate of the sludge concentration and dewatering system contains a high concentration of phosphorus, which causes a certain impact load of pollutants on the influent, and also Reduced biological phosphorus removal efficiency

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