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A kind of starch alcohol wastewater treatment system and method

A technology of alcohol wastewater and treatment system, which is applied in the direction of food industry wastewater treatment, sedimentation treatment, natural water treatment, etc. It can solve the problems of high cost of starch wastewater, large floor area, complex equipment, etc., and achieve high COD load rate, The effect of reducing work stress and shortening time

Active Publication Date: 2019-07-26
GUANGXI LUOCHENG KECHAO FOUND SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biological treatment technology of starch alcohol wastewater is becoming more and more mature. More and more starch processing enterprises continue to develop and innovate, and introduce new starch wastewater treatment technology for improvement. However, the cost of using biological treatment to treat starch wastewater is high, It covers a large area, and although it has a good treatment effect, most enterprises still have high telephone bills during construction. Some enterprises even have the phenomenon of stealthy discharge in order to save costs. For example, Chinese patent CN 105174601 A discloses a starch The biological treatment process of alcohol-like wastewater, this technology starch wastewater is filtered, adjusted, anaerobic treatment, screening, secondary anaerobic treatment, and then denitrification treatment and mud-water separation through an oxide film bioreactor; the separated wastewater Enter the aerobic pool for aerobic treatment; the effluent is further treated through a nanofiltration device, or treated by adding water purifiers and powdered activated carbon through a downflow continuous fixed bed to obtain standard wastewater. This method can well treat starchy wastewater The treatment is up to standard, but this method has complex equipment and high cost, and still has great disadvantages in the application of industrial enterprises. Therefore, in the process of starch alcohol waste liquid treatment, it is necessary to solve the following problems (1) through reasonable Improve and further strengthen the utilization of waste residue and waste gas in the wastewater treatment process; (2) While reducing costs, ensure the operating efficiency of equipment and achieve the discharge of wastewater up to standard

Method used

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  • A kind of starch alcohol wastewater treatment system and method

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Effect test

Embodiment 1

[0040] The waste water and distiller's grains produced in the alcohol processing section are collected by the waste liquid storage tank, and then centrifugally separated by a centrifuge. The organic wastewater is monitored and adjusted. When the suspended content of organic matter in the waste liquid reaches 30g / L, the waste liquid is pumped into the first-stage anaerobic reactor for anaerobic reaction. The first-stage anaerobic reactor is selected from the CSTR anaerobic reactor. , the reaction temperature is 50°C, the pH value of the reaction is 6, and the volume load of COD is 300kg / (m 3 d), after 50 days of stable operation, the concentration of suspended solids in the feed wastewater can be increased to 4000mg / L, and the volume load of COD is 800kg / (m 3 d); The diameter of the methanogenic phase granular sludge is 1mm-3mm, and the sludge concentration is 70kg / m 3 The reaction time is 4 days. The biogas generated by the primary anaerobic reaction is recycled through the b...

Embodiment 2

[0042] The waste water and distiller's grains produced in the alcohol processing section are collected by the waste liquid storage tank, and then centrifugally separated by a centrifuge. The organic wastewater is monitored and adjusted. When the suspended content of organic matter in the waste liquid reaches 50g / L, the waste liquid is pumped into the first-stage anaerobic reactor for anaerobic reaction. The first-stage anaerobic reactor is the CSTR anaerobic reactor. , the reaction temperature is 55°C, the pH value of the reaction is 7, and the volume load of COD is 500kg / (m 3 d), after 60 days of stable operation, the concentration of suspended solids in the feed wastewater can be increased to 4500mg / L, and the volume load of COD is 1200kg / (m 3 d); The diameter of the methanogenic phase granular sludge is 1mm-3mm, and the sludge concentration is 150kg / m 3 The reaction time is 6 days. The biogas generated by the first-stage anaerobic reaction is recovered through the biogas p...

Embodiment 3

[0044] After the waste water and distiller's grains produced in the alcohol processing section are collected in the waste liquid storage tank, they are centrifugally separated by a centrifuge, and the clear liquid is recycled to the crushing section of the starch alcohol processing section for mixing. The organic wastewater in the liquid storage tank is monitored and adjusted. When the suspended content of organic matter in the waste liquid reaches 40g / L, the waste liquid is transferred to the first-stage anaerobic reactor by pump for anaerobic reaction. The first-stage anaerobic reactor uses CSTR anaerobic reactor. Oxygen reactor, the reaction temperature is 52°C, the pH value of the reaction is 6.5, and the volume load of COD is 400kg / (m 3 d), after 55 days of stable operation, the concentration of suspended solids in the feed wastewater can be increased to 4200mg / L, and the volume load of COD is 1000kg / (m 3 d); the diameter of the methanogenic phase granular sludge is 1mm-3...

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Abstract

The invention relates to an environment-friendly wastewater treatment process, in particular to a starch alcohol wastewater treatment system and method. The method comprises the steps of pretreatment, primary anaerobic treatment, secondary anaerobic treatment, secondary aerobic treatment, sludge treatment and the like. A CSTR, a UASB anaerobic reactor and an SBR aerobic treatment system are combined for treating the starch wastewater; meanwhile, the recovery of waste gas and waste slag in the wastewater treatment process is enhanced; the resource utilization rate is enhanced; the goal of further enhancing the waste slag and waste gas utilization in the wastewater treatment process is achieved; the cost is reduced; meanwhile, the operation efficiency of the equipment is ensured; the goal of discharging the wastewater in a standard reaching way is achieved.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of wastewater treatment, in particular to a starch alcohol wastewater treatment system and method. [0003] 【Background technique】 [0004] As the country pays more and more attention to water resources management and environmental protection requirements, and the whole society's awareness of environmental protection increases, the importance of sewage treatment in starch alcohol enterprises is becoming more and more prominent. The requirements for enterprise wastewater discharge are becoming more and more stringent. Enterprises that discharge wastewater that does not meet the standards have changed from paying fines to having to stop production for rectification. Enterprises will pay more and more for pollution accidents. In order to ensure the sustainable development of starch deep processing enterprises Solve the problem of sewage treatment. Will cause serious pollution to the environment. In re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/32
CPCC02F1/24C02F1/38C02F1/66C02F3/1263C02F3/28C02F3/2846C02F9/00C02F11/00C02F11/122C02F2001/007C02F2103/325C02F2301/08Y02E50/30
Inventor 谢永卫
Owner GUANGXI LUOCHENG KECHAO FOUND SCI & TECH DEV
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