Aerobic granular sludge sewage processing method having nitrogen removal effect and special-purpose equipment thereof
An aerobic granular sludge and sewage treatment method, which is applied in the direction of aerobic and anaerobic process treatment, can solve the problems of long aerobic granular sludge cultivation time, high equipment investment and operating costs, and no denitrification effect, etc. problem, to achieve good sewage treatment effect, excellent settling performance, and increase the effect of oxygen dissolution
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Embodiment 1
[0048] Example 1. Treatment of cornstarch factory wastewater (taken from the effluent of the regulating tank)
[0049] Reaction target solution volume: 2.8L
[0050] Reaction target solution: wastewater from a corn starch factory (taken from the effluent of the regulating tank), the water quality is:
[0051] Chemical oxygen demand (COD): 10000-12000mg / L
[0052] Nitrate nitrogen: 25-40mg / L
[0053] Nitrite nitrogen: 0.04-0.06mg / L
[0054] pH: 4.5-5.5
[0055] The reaction conditions are:
[0056] Aspect ratio: 1:15
[0057] Reactor height: 1.2m
[0058] The rising gas velocity in the inner tower 9 of the central aerobic nitrification zone 2 is maintained at 10m / h
[0059] Sewage hydraulic retention time 6 hours
[0060] The treatment effect is shown in Table 1, and the index parameters such as sewage and sludge in the reactor are shown in Table 2.
[0061] Table 1 Example 1 Treatment effect of sewage from a corn starch factory (water from the regulating tank)
[006...
Embodiment 2
[0066] Example. 2 Treatment of urban sewage (taken from the fine screen effluent of an urban sewage plant)
[0067] The reaction target solution volume is: 2.8L
[0068] Reaction target solution: an urban sewage (taken from the fine screen effluent of an urban sewage plant), the water quality is:
[0069] Chemical oxygen demand (COD): 250-350mg / L
[0070] Total nitrogen: 25-40mg / L
[0071] pH: 6.5-8.5
[0072] The reaction conditions are:
[0073] Aspect ratio: 1:15
[0074] Reactor height: 1.2m
[0075] The rising gas velocity in the inner tower 9 of the central aerobic nitrification zone 2 is maintained at 5m / h
[0076] Sewage hydraulic retention time 3 hours
[0077] The treatment effect is shown in Table 3, and the index parameters such as sewage and sludge in the reactor are shown in Table 4.
[0078] Table 3 Example 2 Treatment Effects of Fine Screen Effluent from Urban Sewage Plant
[0079]
[0080] Table 2 Example 1 Treatment of sewage and sludge in the rea...
Embodiment 3
[0083] Example. 3 Treatment of corn starch factory wastewater (taken from the effluent of anaerobic reaction pool)
[0084] The reaction target solution volume is: 2.8L
[0085] Reaction target solution: wastewater from a corn starch factory (taken from the effluent of anaerobic reaction tank), the water quality is:
[0086] Chemical oxygen demand (COD): 752mg / L
[0087] Total nitrogen: 35mg / L
[0088] pH: 7.6
[0089] The reaction conditions are:
[0090] Aspect ratio: 1:15
[0091] Reactor height: 1.2m
[0092] The rising gas velocity in the inner tower 9 of the central aerobic nitrification zone 2 is maintained at 8m / h
[0093] Sewage hydraulic retention time 5 hours
[0094] Dissolved oxygen in the central aerobic nitrification zone can be maintained above 2.0mg / L
[0095] temperature at 18°C
[0096] Suspended particulate matter concentration (SS) 120mg / L
[0097] The effluent COD is 54mg / L, and the removal rate reaches 92.8%.
[0098] The total nitrogen in the e...
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