Neutralization-free furfural wastewater biochemical treatment process

Abstract

The invention relates to biochemical treatment technology for unneutralized furfural wastewater. The furfural wastewater enters into an emergency reservoir first; partial furfural wastewater produced during production of furfural each day enters into a regulating reservoir, and the other part of the furfural wastewater enters into the emergency reservoir; the furfural wastewater in the emergency reservoir is extracted and pumped into the regulating reservoir by a temperature adjusting pump, and the temperature of the furfural wastewater in the regulating reservoir is adjusted to be between 35 and 40 DEG C; the furfural wastewater is lifted by a sewage pump into an anaerobic sequencing-batch reactor, and is fully mixed with anaerobe; a large part of organic pollutant is decomposed into methane and water under the physiological action of the anaerobe; when the pH of a solution in the anaerobic sequencing-batch reactor is raised to be between 7.0 and 7.2, operation of a circulating pump and a pulse feeder is stopped for entering into a precipitation stage; after precipitation, the water flows into an intermediate reservoir through a siphonic decanting drainer; and the wastewater in the intermediate reservoir is lifted by an intake pump of a sequencing-batch activated sludge process, enters into a reservoir of the sequencing-batch activated sludge process according to operation rules of the sequencing-batch activated sludge process, is purified, enters into a clean water reservoir, is subjected to strong oxidation treatment of ozone, and is released after reaching the standard.

Description

technical field

[0001] The invention relates to a waste water treatment process, which is a process for biochemical treatment of neutralization-free furfural waste water. Background technique

[0002] The current furfural wastewater treatment technologies mainly include physical, chemical and biochemical methods.

[0003] (1) Physical method: mainly multi-effect evaporation process and membrane filtration process. The multi-effect evaporation process uses the primary steam generated by the boiler to evaporate waste water to generate secondary steam, and the secondary steam enters the hydrolysis pot for furfural production for furfural production. After the scale generated in the multi-effect evaporator is cleaned out, it enters the boiler for incineration. Thereby realizing zero discharge of furfural production wastewater. The problem with this process is that all substances with a boiling point below 170°C in the furfural wastewater enter the hydrolysis pot with the secon...

Examples

Embodiment Construction

[0027] Furfural wastewater first enters the accident pool, and the volume of the accident pool must be able to store 10 days of waste water; after 6-7 days of waste water is stored in the accident pool, part of the high-temperature furfural wastewater generated by furfural production every day enters the regulating pool, and the rest enters the accident pool , and then use the temperature-regulating pump to pump the water from the accident pool into the regulating pool, so that the temperature of the wastewater in the regulating pool is adjusted to between 35-40°C;

[0028] Wastewater with a suitable temperature enters the anaerobic sequencing batch reactor under the lift of the sewage pump. The anaerobic sequencing batch reactor must maintain a bicarbonate alkalinity of 1500-2500mg / L and a temperature of 35-40°C, and pass Add the special nutrient solution for furfural wastewater to maintain the necessary nutrients for anaerobic bacteria. The bicarbonate alkalinity is used to ...

technical field

[0001] The invention relates to a waste water treatment process, which is a process for biochemical treatment of neutralization-free furfural waste water. Background technique

[0002] The current furfural wastewater treatment technologies mainly include physical, chemical and biochemical methods.

[0003] (1) Physical method: mainly multi-effect evaporation process and membrane filtration process. The multi-effect evaporation process uses the primary steam generated by the boiler to evaporate waste water to generate secondary steam, and the secondary steam enters the hydrolysis pot for furfural production for furfural production. After the scale generated in the multi-effect evaporator is cleaned out, it enters the boiler for incineration. Thereby realizing zero discharge of furfural production wastewater. The problem with this process is that all substances with a boiling point below 170°C in the furfural wastewater enter the hydrolysis pot with the secon...

Examples

Embodiment Construction

[0027] Furfural wastewater first enters the accident pool, and the volume of the accident pool must be able to store 10 days of waste water; after 6-7 days of waste water is stored in the accident pool, part of the high-temperature furfural wastewater generated by furfural production every day enters the regulating pool, and the rest enters the accident pool , and then use the temperature-regulating pump to pump the water from the accident pool into the regulating pool, so that the temperature of the wastewater in the regulating pool is adjusted to between 35-40°C;

[0028] Wastewater with a suitable temperature enters the anaerobic sequencing batch reactor under the lift of the sewage pump. The anaerobic sequencing batch reactor must maintain a bicarbonate alkalinity of 1500-2500mg / L and a temperature of 35-40°C, and pass Add the special nutrient solution for furfural wastewater to maintain the necessary nutrients for anaerobic bacteria. The bicarbonate alkalinity is used to ...

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