兼氧-AB工艺处理屠宰废水工程性试验及其微生物学特性研究

Production Test on Facultative Anaerobic-AB Process In Treating Slaughterhouse Wastewater and Its Microbiological Characteristics.

废水处理试运行期间,兼性厌氧调节池负荷率平均为0.50kgCOD_(Cr)/(m^3·d),COD_(Cr)去除率31.15％;A级污泥负荷B_(TS)平均为4.78kg BOD_5/(kg MLSS·d),COD_(cr)去除率53.37％;B级B_(TS) 0.73kg BOD_5/(kg MLSS·d),COD_(Cr)占除率54.70％。处理出水几项主要污染指标达到《GB8978—88》污水综合排放标准,其中COD_(Cr)103.1mg/L(去除88.77％),BOD_5 32.0mg/L(去除94.47％),SS 36.1mg/L(去除89.64％),色度26倍(去除80.60％),pH7.72。投入正式运行后,出水水质稳定,相对标准差0.48。在兼性厌氧调节池生物膜中,存在着厌氧发酵微生物区系;好氧处理阶段的A级以细菌为主,B级以原生动物和菌胶团为主,原生动物占优势。

To treat the slaughterhouse wastewater of Neijiang Comprehensive Processing Plant,facultative anaerobic-AB process was used. During the trial operation,the loading rate of facultative anaerobic regulating tank was 0. 50kgCODCr/m3, and its removal rate of CODCr(ηCODCr) was 31.15% the sludge loading rate (firs) in A-stage was 4. 78kgBOD5/(kgMLSS· d) and ηCODCr = 53. 37% ;in B-stage, BTS = 0. 73 kgBOD5/(kgMLSS· d) and ηCODCr = 54. 70%. There was no problem for this process in compliance with the national standards,the effluent had CODCr103. 1mg/L(η = 88. 77%) ,BOD532. Omg/L(η= 94. 47%) ,SS 36. 1mg/L(η= 89. 64%) ,Color 26 times (η=80. 60%),and pH 7. 72. When this process was put into formal operation,its effluent quality remain stable with γ=0. 48. Results indicated that this process was stable with high efficiency and low investment needed. It is an advanced process worth spreading. There was an anaerobic digestion microorganism community in the biomembrane formed on the support material in facultative anaerobic regulating tank;besides this, there were different biosystematics existing in A and B stages' aerobic tanks, A-stage is predominant in bacteria and B-stage in protozoa. The analysis of the microbiological characteristics of this process offer theoretical basis for using it to treat other kinds wastewater.