CN201737773U

CN201737773U - Sequencing batch biofilm reactor of pig farm wastewater

Info

Publication number: CN201737773U
Application number: CN2010202280165U
Authority: CN
Inventors: 万金保; 顾平
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2010-06-18
Filing date: 2010-06-18
Publication date: 2011-02-09
Anticipated expiration: 2020-06-18

Abstract

A sequencing batch biofilm reactor (SBBR) for pig farm wastewater, comprising a square steel-concrete structure pool, a decanter, three-dimensional elastic fillers suspended in the pool, and a microporous aeration disc for aeration at the bottom of the pool; the SBBR reactor A single operation cycle includes five processes of water inflow, reaction, precipitation, water outflow, and idle, and each unit operation is controlled by PLC. The utility model has the characteristics of high ability to degrade organic matter and remove ammonia nitrogen, reduce the output of residual sludge after treatment, large sewage treatment capacity, and is suitable for the whole process of automatic control.

Description

The sequencing batch biofilm reactor of piggery wastewater

Technical field

The utility model relates to environment project equipment, relates in particular to a kind of treatment facility of piggery wastewater of high-concentration hardly-degradable.

Background technology

Livestock breeding wastewater, particularly large scale of pig farm waste water have become the many geographic primary pollution sources of China.Present most pig farm adopts solid-liquid separation-anaerobic-aerobic to handle excrement and urine water, and sequencing batch reactor (SBR) is used widely as piggery wastewater anaerobic digestion solution aerobic treatment reactor.SBR is the abbreviation of sequencing batch reactor (Sequencing Batch Reactor).Compare with the continous way Sludge System, SBR is to be principal character with the periodical operation.Continuous flow process spatially is a successive.Waste water at first enters reaction tank, enters settling tank then mixed liquid is precipitated, and discharges from water outlet with the supernatant liquor after active sludge separates; And the flow process of SBR only is located in the pond, then is successive in time, and SBR concentrates on the function of aeration tank and second pond on the pond, carries out water yield adjusting, organic degraded and solid-liquid separation etc. in the different time periods.SBR is by periodic duty, and the working cycle in each cycle comprises into water, reaction, precipitation, discharging and five operations such as idle.But SBR technology is directly handled the pig farm anaerobic digestion solution and is had shortcomings such as sludge settling is poor, sludge concentration is lower.

Summary of the invention

The purpose of this utility model is directly to handle the pig farm anaerobic digestion solution at SBR technology, and the shortcoming that sludge settling is poor, sludge concentration is low provides a kind of sequencing batch biofilm reactor (SBBR) of handling piggery wastewater.Breeding wastewater is after treatment, and its waste discharge reaches GB18596-2001 " livestock and poultry breeding industry pollutant emission standard ".

The utility model is achieved through the following technical solutions:

Described SBBR reactor is square Reinforced Concrete Structure, its upper end is provided with water inlet and strains hydrophone, by straining the hydrophone draining, be provided with the biofilm packing fixed support in the reactor, biofilm packing is loaded on the filler fixed support, and biofilm packing can be elastic solid filler, combined stuffing, soft-filler and semi soft packing.The intervention of filler provides more favourable living environment for microorganism.The micro-pore aeration dish is installed in reaction container bottom, is positioned at the biofilm packing below, vertically upward aeration.The whole reactor operation is controlled automatically by the PLC system.The single cycle of operation of SBBR reactor comprises into water, reaction, precipitation, water outlet, idle 5 processes, each unit operation is controlled by PLC, SBBR requires press the intermittent operation of certain hour order, the removal that effective control and the replacement by each time operation phase realizes all contaminations.

SBBR (Sequencing Biofilm Batch Reactor) is the different biofilm packing (as elastic solid filler, combined stuffing, soft-filler and semi soft packing etc.) of filling in the sbr reactor device, adopt carrier with microbial immobilized cultivation, reach special process requirements such as denitrogenation, dephosphorization and degradation of organic substances.The intervention of biofilm packing provides more favourable living environment for microorganism.Microorganism constitutes a complicated ecosystem of being made up of a plurality of trophic levels such as bacterium, fungi, algae, protozoon, metazoans in the vertical, the direction that flows to carrier has in the horizontal downstream constituted the aerobic type that suspends, has adhered to aerobic type, has adhered to facultative type and the microflora of adhering to the multiple different mobilities of having of anaerobic type, type of respiration, nutrient type, thereby has improved the processing power and the stability of reactor greatly.Adopt the microbial film mud of polymer carrier better than the settling property of floc sludge, sedimentation is fast, more helps saving the water outlet time.

The utility model beneficial effect is:

(1) SBBR is the improved technology of SBR, and the operating process when it handles waste water also comprises 5 stages: water inlet, reaction, precipitation, water outlet, idle, each operation condition is with the periodical operation of certain hour order.Microbial film is fixed on filling surface, has formed the stable ecosystem.Can perch the speed of growth is slow, generation time is long bacterium and higher microorganism, as nitrifier, so the SBBR method has very high ammonia nitrogen removal ability.

(2) biomass is many, and the output of excess sludge is few, and the device processes ability is big.Perching the biology of more high-plane of nutrition on the microbial film, its food chain is long than SBR, and the generation of mud is few, has reduced the sludge disposal expense.Simultaneously, because the apposition growth of microorganism, the microbial film of SBBR has less water ratio, and the biomass of reactor unit volume can be up to 5～20 times of activated sludge process, so these structures have bigger processing power.

(3) adopt the microbial film mud of polymer carrier better than the settling property of floc sludge, sedimentation is fast, more helps saving the water outlet time, makes sewage treatment capacity strengthen.

(4) can realize full automatic control to SBBR, can realize the combination and the switching of kinds of processes flow process easily, be convenient to best flow process is selected and debugged.

Description of drawings

Fig. 1 is a SBBR pool structure sectional view;

Fig. 2 is a SBBR pool structure orthographic plan.

Among Fig. 1 and Fig. 2: 1. air, 2. filler, the 3.PLC Controlling System is 4. strained hydrophone, 5. aeration plate, 6. water outlet, 7. water inlet.

Embodiment

Certain large-scale pig farm adopts methane-generating pit+SBBR combination process to handle 150m ³/ d the waste water of raising pigs, the square steel and concrete structure of SBBR reactor is of a size of length * wide * height=6m * 3m * 5m.The methane-generating pit water outlet flows into the SBBR pond, through the SBBR pond aerobic/the oxygen nitration denitrification of holding concurrently after, remove the pollutents such as COD, ammonia nitrogen and phosphorus of waste water further.Waste water after treatment, effluent quality reaches GB18596-2001 " livestock and poultry breeding industry pollutant emission standard " requirement, SBBR water outlet COD 300～400mg/L, NH ₃-N 40～80mg/L TP 5～8mg/L.

Specific implementation process is as follows:

(1) piggery wastewater through holding back of mechanical grille, is removed macrobead pollution substance and floating matter in the sewage after the sewage collecting pipe network is collected, and waste water enters methane-generating pit.

(2) waste water flows into methane-generating pit, through efficient anaerobic digestion, after removing most COD acquisition biogas, regulates water quality and quantity through settling tank, flows into the SBBR pond.

(3) SBBR operation condition: water inlet 1h, aeration 2h, precipitation 1h, aeration 2h, precipitation 1h, aeration 2h, precipitation 1h, water outlet 1h, idle 1h, through the SBBR pond aerobic/the oxygen nitration denitrification of holding concurrently after, remove the pollutents such as COD, ammonia nitrogen and phosphorus of waste water further.

(4) SBBR is provided with automatic control device simultaneously, can online modification the SBBR technical process and each working time the section parameter, and SBBR carried out full automatic control, reach the optimum operation pattern, waste water after treatment, effluent quality reaches GB 18596-2001 " livestock and poultry breeding industry pollutant emission standard " requirement.

Claims

1. the sequencing batch biofilm reactor of a piggery wastewater (SBBR), it is characterized in that: described SBBR reactor is square Reinforced Concrete Structure, its upper end is provided with water inlet and strains hydrophone, be provided with the biofilm packing fixed support in the reactor, biofilm packing is loaded on the filler fixed support, and the micro-pore aeration dish is installed in reaction container bottom, is positioned at the biofilm packing below, aeration vertically upward, the whole reactor operation is controlled automatically by the PLC system.

2. the sequencing batch biofilm reactor of a kind of piggery wastewater according to claim 1 (SBBR), it is characterized in that: described biofilm packing can be elastic solid filler, combined stuffing, soft-filler and semi soft packing.