Study On Pig-raising Wastewater Treatment Progress Of Internal Circulation Biological Contact Oxidation And Oxidation Ponds

With the development of economy, people's living standard is higher and higher, the demand for meat increases year by year, thus the amount of pig slaughter is also increasing year by year. Pig-producing produces in the process of pollutant is also in increased annually. With the constant expansion of cultivation enterprise, the traditional counters-field mode and wastewater treatment mode with through the natural can adapt to the needs of large pig farm wastewater treatment, efficient industrialization processing model comes into being.In this paper, IC+BCO+Facultative pond craft for the study, a comprehensive treatment of swine wastewater, and the research showed that:(I)With IC+BCO+Facultative pond craft processing swine wastewater, engineering commissioning time was about 90 days, after normal operation had achieved the water livestock farming systems standards for pollutants discharge "(GB18596-2001) of water quality requirements;(II) IC reactor after 3 months of commissioning, the reactor volume load reached the design level, within reactor form massive particles diameter for 2-4mm of granular sludge, the sludge sedimentation performance was very good, strong ability of organic matter degradation and the effluent CODcr maintained at 600-800mg/L,and removal rate reached 70%, reactor had certain impact resistant ability;(III) Biological contact oxidation pond into the water after 6 times increase after the reactor was operating at full capacity, CODcr removal rate of 70%, after about 2 months to start a successful and had a certain ability to resist impact load;(IV) Return of 200% wastewater and aerobic pool of water with 20% of the original program could effectively solve the breeding process of nitrogen removal wastewater treatment low rate, anaerobic digestion poor biodegradability, C:N:P imbalance caused by low efficiency of aerobic treatment follow-up, needed to add a large number of alkali to maintain the system pH problems;(V) The water temperature is high (higher than 15℃), the bio-oxidation pond algae and other plants within the wastewater in the NH3-N and TP had a strong capacity utilization, oxidation pond on the average NH3-N removal rate was 40%, and The average removal rate of TP was 82.6%, and the effluent quality could meet the discharge standards;(VI)The process was handled by the slaughter of 10,000 pigs in the production of wastewater,1.2335 million yuan investment project, in accordance with the waste water treatment capacity 110m3/d basis, equivalent to running costs for the wastewater treatment unit of 1.47yuan/m3.