Series-connection and parallel-connection disc tube type reverse osmosis device for trash leachate treatment and application method thereof

Abstract

The invention discloses a series-connection and parallel-connection disc tube type reverse osmosis device for trash leachate treatment and an application method thereof. The device comprises a first-stage disc tube type reverse osmosis membrane column (1), a second-stage disc tube type reverse osmosis membrane column (2) and an air stripping tower (3). By connecting pipelines and arranging valves at proper positions, the switching between the series connection and the parallel connection of the first-stage disc tube type reverse osmosis membrane column (1) and the second-stage disc tube type reverse osmosis membrane column (2) is achieved; by means of a control system, the automated running of the device is achieved, and the manual labor intensity and the running cost of the device are reduced. When the series-connection mode is adopted, the energy utilization rate can be increased, the ammonia nitrogen removal rate is increased, the pressure damage on the second-stage disc tube type reverse osmosis membrane column is reduced, and the service life of the device is prolonged; when the parallel-connection mode is adopted, the leachate treatment capacity can be improved, and the leachate treatment efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a serial and parallel disc tube type reverse osmosis (RCDT) equipment and an application method thereof for treating landfill leachate. Background technique [0002] RCDT (Radial Channel Disc Tube) is called Radial Channel Disc Tube Reverse Osmosis. The principle of the disc tube reverse osmosis membrane column is: through the pressure, the water molecules in the leachate pass through the reverse osmosis membrane, and most of the pollutants (such as ammonia nitrogen, etc.) are intercepted, so as to achieve the purpose of purifying the leachate. The technological process of leachate treatment by its equipment is as follows: the leachate in the adjustment pool is pumped to the leachate raw water storage tank, and after simple pretreatment such as pH value adjustment, sand filter, and core filter, it enters the first-stage RCDT. The permeate produced after the f...

AI Technical Summary

Problems solved by technology

This kind of traditional RCDT equipment usually has the following defects: (1) the ammonia nitrogen content of the effluent quality is difficult to meet the standard; (2) the effluent from the primary treatment directly enters the secondary treatment without a buffer stage in the middle, the energy consumption of the pump is high, and cannot Precise control of the treatment water pressure increases the pressure damage to the secondary RCDT membrane, which is prone to pressure difference damage to the diaphragm and shortens the service life of the secondary RCDT membrane

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