Dyosile Phumeza Akhona, Mdladla Cebisa, Njoya Mahomet, Basitere Moses, Ntwampe Seteno Karabo Obed, Kaskote Ephraim
Bioresource Engineering Research Group (BioERG), Cape Peninsula University of Technology, Symphony Way, Bellville Campus, Cape Town 7535, South Africa.
Academic Support Programme for Engineering in Cape Town (ASPECT) & Water Research Group, Department of Civil Engineering, University of Cape Town, Rondebosch, Cape Town 7700, South Africa.
Membranes (Basel). 2021 Jul 30;11(8):582. doi: 10.3390/membranes11080582.
This paper assesses the performance of an integrated multistage laboratory-scale plant, for the treatment of poultry slaughterhouse wastewater (PSW). The system was comprised of an eco-flush dosed bio-physico pre-treatment unit for fats, oil, and grease (FOG) hydrolysis prior to the PSW being fed to a down-flow expanded granular bed reactor (DEGBR), coupled to a membrane bioreactor (DEGBR-MBR). The system's configuration strategy was developed to achieve optimal PSW treatment by introducing the enzymatic pre-treatment unit for the lipid-rich influent (PSW) in order to treat FOG including odour causing constituents such as HS known to sour anaerobic digestion (AD) such that the PSW pollutant load is alleviated prior to AD treatment. This was conducted to aid the reduction in clogging and sludge washout in the DEGBR-MBR systems and to achieve the optimum reactor and membrane system performance. A performance for the treatment of PSW after lipid reduction was conducted through a qualitative analysis by assessing the pre- and post-pre-treatment units' chemical oxygen demand (COD), total suspended solids (TSS), and FOG concentrations across all other units and, in particular, the membrane units. Furthermore, a similar set-up and operating conditions in a comparative study was also performed. The pre-treatment unit's biodelipidation abilities were characterised by a mean FOG removal of 80% and the TSS and COD removal reached 38 and 56%, respectively. The final acquired removal results on the DEGBR, at an OLR of ~18-45 g COD/L.d, was 87, 93, and 90% for COD, TSS, and FOG, respectively. The total removal efficiency across the pre-treatment-DEGBR-MBR units was 99% for COD, TSS, and FOG. Even at a high OLR, the pre-treatment-DEGBR-MBR train seemed a robust treatment strategy and achieved the effluent quality set requirements for effluent discharge in most countries.
本文评估了一个集成式多级实验室规模装置处理家禽屠宰场废水（PSW）的性能。该系统包括一个生态冲洗定量生物物理预处理单元，用于在将PSW输送到下流式膨胀颗粒床反应器（DEGBR）之前对脂肪、油和油脂（FOG）进行水解，该反应器与膜生物反应器（DEGBR - MBR）相连。该系统的配置策略是通过引入针对富含脂质的进水（PSW）的酶预处理单元来实现PSW的最佳处理，以处理包括导致气味的成分（如已知会使厌氧消化（AD）酸化的HS）在内的FOG，从而在AD处理之前减轻PSW的污染物负荷。这样做是为了帮助减少DEGBR - MBR系统中的堵塞和污泥冲刷，并实现反应器和膜系统的最佳性能。通过评估预处理单元前后以及所有其他单元（特别是膜单元）的化学需氧量（COD）、总悬浮固体（TSS）和FOG浓度，对脂质减少后的PSW处理性能进行了定性分析。此外，还在一项对比研究中进行了类似的设置和操作条件实验。预处理单元的生物脱脂能力表现为平均FOG去除率达80%，TSS和COD去除率分别达到38%和56%。在DEGBR上，当有机负荷率（OLR）约为18 - 45 g COD/L·d时，COD、TSS和FOG的最终去除率分别为87%、93%和90%。预处理 - DEGBR - MBR单元对COD、TSS和FOG的总去除效率为99%。即使在高OLR下，预处理 - DEGBR - MBR流程似乎也是一种稳健的处理策略，并且达到了大多数国家规定的出水排放水质要求。
