Wastewater treatment device and process in xylitol processing

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly discloses a wastewater treatment device in xylitol processing. The device comprises: an adjusting tank, an anaerobic reactor and a precipitation reactor, wherein the anaerobic reactor is in pipe connection with the adjusting tank and is in pipe connection with the precipitation reactor, and the precipitation reactor is in pipe connection with the adjusting tank through a water pump;a filtering device; a biogas desulfurization device connected with the anaerobic reactor through a pipe; an aeration tank connected with the anaerobic reactor through a pipe; and a precipitation tank connected with the water outlet pipe of the aeration tank, wherein the precipitation tank is connected with a municipal sewage treatment plant pipe. According to the device disclosed by the invention, nickel, high sulfate radicals and COD in the wastewater are removed by combining a plurality of equipment, and compared with a traditional chemical method for treating the nickel wastewater and an anaerobic process only, the device disclosed by the invention has the advantages of high efficiency and low cost.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a waste water treatment device and process in xylitol processing. Background technique [0002] In the common process of using hemicellulose as raw material to produce xylitol, the waste water produced has the characteristics of high COD and high sulfate radicals, and the use of Raney nickel catalyst in the hydrogenation process leads to the heavy metal nickel in the waste water; [0003] The traditional wastewater treatment process has the following disadvantages: 1. The nickel-containing wastewater is treated separately by chemical method, and the wastewater treatment cost is relatively high; 2. The traditional anaerobic process cannot treat the wastewater with high sulfate radicals, and the removal of COD depends on the exposure of large-load activated sludge. gas technology, further pushing up the operating cost of the sewage station. [0004] Based on this, ho...

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Problems solved by technology

[0003] The traditional wastewater treatment process has the following disadvantages: 1. The nickel-containing wastewater is treated separately by chemical method, and the wastewater treatment cost is relatively high; 2. The traditional anaerobic process cannot treat the wastewater with high sulfate radicals, and the removal of COD depends on the exposure of large-load activated sludge. Gas technology, further pushing up the operating costs of sewage stations

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