Treatment process of glycine condensation wastewater

A technology for condensing wastewater and treatment process, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, ammonia compounds, etc. It can solve the problem that condensed wastewater cannot meet the discharge standard, and achieve low pharmaceutical costs and strong adsorption capacity. , the effect of improving the adsorption capacity

Active Publication Date: 2015-05-20
HUBEI XINGFA CHEM GRP CO LTD
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Problems solved by technology

The process has a high resistance to the impact of water quality and water volume fluctuations, requires less chemical reagents, and only needs to add a small amount of soda ash or hydrochloric acid to balance the organic acid produced by the anaerobic reaction. Inexpensive and easy to operate, it solves the problem that glycine condensation wastewater cannot meet the discharge standard for a long time

Method used

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  • Treatment process of glycine condensation wastewater
  • Treatment process of glycine condensation wastewater
  • Treatment process of glycine condensation wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Pilot test of deammonification pretreatment of glycine condensate wastewater, with a treatment capacity of 1 ton / h. The removal effect of the deamination unit on pollutants is shown in Table 1.

[0027] Table 1. Removal effect of pollutants by deamination unit

[0028]

[0029] Known from Table 1: the two-stage removal is 45.3%, and the removal rate of formaldehyde is 36.8%. The deamination process is carried out under the original temperature of 34-40 degrees Celsius and the original pH condition (9-10) of the wastewater. The wastewater pretreated by the deamination unit can directly enter the biochemical unit for further treatment.

Embodiment 2

[0031] Pilot test of anaerobic treatment of glycine condensate wastewater. The processing capacity is 0.3 tons / h.

[0032] About 13 tons of muddy water discharged from the sludge digestion tank in the sludge treatment system of the biochemical sewage treatment plant was taken as the inoculation sludge for this pilot test. Each of the primary and secondary EGSB reactors was inoculated with 6.5 tons of sludge, diluted with an appropriate amount of water from the lower sump, and then pumped into the reactor tank. Turn on the reflux pump. After three days of cultivation, more air bubbles were observed on the filling top. On the fourth day, a small amount of waste water was introduced. Add 10kg of sugar to each of the two-stage anaerobic reactors on the 1-27th day, and pump the sugar from the sump at the lower part of the reactor after melting. No more sugar after day 28. The pH value in the reaction zone of the EGSB anaerobic reactor is measured every day in the range of 6.5-8....

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Abstract

The invention relates to a treatment process of glycine condensation wastewater, which specifically comprises the following steps: spraying the glycine condensation wastewater down from a first-level deamination tower; absorbing in air from the bottom of the first-level deamination tower in which the air is absorbed by sulfuric acid to generate ammonium sulfate, recycling the ammonium sulfate, conveying the rest wastewater to a second-level deamination tower by a second-level lift pump, and spraying the wastewater down from the second-level deamination tower to realize free flow; absorbing in air from the bottom of the second-level deamination tower in which the air is absorbed by sulfuric acid to generate ammonium sulfate, recycling the ammonium sulfate, and conveying the rest wastewater to a first-level EGSB anaerobic reactor by a first-level anaerobic lift pump; conveying the wastewater in a first-level anaerobic water collection tank to a second-level EGSB anaerobic reactor by a second-level anaerobic lift pump; and discharging the wastewater from the upper part of a second-level anaerobic sedimentation tank and conveying to an aerobic tank by an aerobic lift pump, wherein the bottom of the second-level anaerobic sedimentation tank is connected with an EGSB reflux pump. The total operation cost of the system is 3-4 yuan/m<3>, the high-concentration water can be diluted by 10-30 times through the three reflux systems, and the tolerance of an anaerobic system to the toxicity of high-concentration wastewater is improved to a relatively great degree.

Description

technical field [0001] The invention relates to a treatment process for condensed waste water produced in the production process of glycine. Background technique [0002] Glycine is an important fine chemical intermediate, widely used in pesticide, medicine, food, chemical fertilizer, feed and other industries. Especially since the advent of the global herbicide glyphosate, the application of glycine in the pesticide industry has increased rapidly. The global demand for glycine is expected to exceed 300,000 tons per year, and glycine has a wide range of uses. Glycine condensation wastewater contains many types of pollutants, high concentration, and difficult separation, which is a highly difficult wastewater treatment. It is of great significance for the glycine industry to study economically feasible, convenient recycling and purification methods suitable for large-scale on-site treatment of condensate wastewater. [0003] At present, there are no reports on the relevant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C01C1/242
Inventor 马会娟李永刚康群吴让鹏
Owner HUBEI XINGFA CHEM GRP CO LTD
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