Ion Exchange Waterleau Ltd., Process and Proposal Division, Reveira Apartments, 4th Floor, Plot No. 134, 6-3-347/9 Punjagutta, Hyderabad 500 082, India.
Bioresour Technol. 2010 Apr;101(8):2896-9. doi: 10.1016/j.biortech.2009.11.097. Epub 2009 Dec 31.
Generation of poly-hydroxyalkanoates (PHAs) from milk and ice-cream processing wastewater was studied in a continuous mode reactor system at pilot scale. The integrated system comprised an anaerobic acidogenic reactor (AAR), a conventional activated sludge production reactor (ASPR) and a PHA synthesis reactor (PHAR) to induce PHA accumulation in the biomass which was finally harvested while treating the raw dairy wastewater to meet the disposal limits thereby reducing generation of disposable sludge. The PHA content in the PHA rich biomass was approximately 43% of the sludge dry weight. Kinetics of both ASPR and PHAR were studied. The maximum PHA yield coefficient (Y(sp)(max)) with respect to COD degradation in the PHAR was derived as 0.25 kg PHA/kg of COD degraded. Similarly, the kinetic parameters i.e. K(s), micro(m), Y(obs) and k(d) of the ASPR were 37.16 mg/l COD, 0.97 d(-1), 0.51 mg MLSS/mg COD and 0.049 d(-1), respectively.
利用中试规模的连续式反应器系统，从牛奶和冰淇淋加工废水中生成聚羟基烷酸酯（PHA）。该集成系统包括一个厌氧产酸反应器（AAR）、一个传统的活性污泥生产反应器（ASPR）和一个 PHA 合成反应器（PHAR），以诱导生物量中 PHA 的积累，然后在处理原奶废水以满足处理限制的同时收获生物量，从而减少一次性污泥的产生。富含 PHA 的生物质中的 PHA 含量约占污泥干重的 43%。研究了 ASPR 和 PHAR 的动力学。在 PHAR 中，相对于 COD 降解，PHA 的最大产率系数（Y(sp)(max)）推导为 0.25 kg PHA/kg COD 降解。同样，ASPR 的动力学参数 K(s)、μ(m)、Y(obs)和 k(d)分别为 37.16 mg/l COD、0.97 d(-1)、0.51 mg MLSS/mg COD 和 0.049 d(-1)。
