System for treating photovoltaic sewage and sludge recycling device for system

Abstract

The invention discloses a sludge recycling device. The sludge recycling device is arranged between a hydrolysis acidification tank and a biochemical reaction tank and comprises a return pipeline and adjusting plates, wherein the return pipeline is used for connecting the hydrolysis acidification tank with the biochemical reaction tank; a sludge circulation pump is arranged on the return pipeline; at least one adjusting plate is arranged in the hydrolysis acidification tank as well as the biochemical reaction tank; a branch of the return pipeline is connected with the communication holes of the adjusting plates; the return pipeline is further provided with a sampling branch. Through the adoption of the sludge recycling device, samples can be taken from the water layers, in which the adjusting plates are arranged, in the hydrolysis acidification tank and the biochemical reaction tank; whether bacterium concentrations at the position where the adjusting plates are arranged, can meet the degradation requirements of wastewater is judged through the sampled sludge; then sludge is added according to the sludge demand degrees of different water layers in the hydrolysis acidification tank, or sludge is provided according to sludge concentrations of different water layers in the hydrolysis acidification tank; therefore, sludge distribution is relatively uniform, and the degree of degradation of bacteria on organic matters in the wastewater is increased. The invention further discloses a system for treating photovoltaic sewage, which adopts the sludge recycling device.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to a photovoltaic sewage treatment system and a sludge recycling device thereof. Background technique [0002] During the manufacturing process of photovoltaic modules, photovoltaic sewage is mainly waste cutting fluid produced by wire sawing, band sawing and cleaning in the silicon wafer workshop, containing organic substances such as silicon carbide and polyethylene glycol. [0003] Please refer to figure 1 and figure 2 , figure 1 is the flow chart of the photovoltaic sewage treatment system, figure 2 It is a schematic structural diagram of a sludge recycling device of a typical photovoltaic sewage treatment system. [0004] Photovoltaic sewage treatment process such as figure 1 As shown, the sewage first enters the regulating tank through the grid, and then passes through the flocculation reaction tank, the advection sedimentation tank, the hydrolysis acidification t...

AI Technical Summary

Problems solved by technology

When the sludge reuse device is turned on, the sludge in the biochemical reaction tank 2' is directly pumped back to the hydrolysis and acidification tank 1', which makes the distribution of sludge concentration in the hydrolysis and acidification tank 1' more uneven. After the sewage passes through, different positions The degree of degradation of the organic matter in the sewage is different, which affects the degree of degradation of the organic matter in the sewage by the fungus, and then affects the progress of the sewage treatment.

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