Water Research Institute, C.N.R, Viale F. De Blasio 5, 70132, Bari, Italy.
Water Research Institute, C.N.R, Viale F. De Blasio 5, 70132, Bari, Italy.
J Environ Manage. 2021 Apr 15;284:112011. doi: 10.1016/j.jenvman.2021.112011. Epub 2021 Jan 27.
The effectiveness of an advanced treatment of wastewater generated by non-hazardous plastic solid waste (PSW) washing, based on the Sequencing Batch Biofilter Granular Reactor (SBBGR), was assessed in terms of gross parameters, removal efficiencies and sludge production. The proposed treatment was also compared with the conventional treatment, which was based on primary and secondary treatments, using the activated sludge process, performed by Recuperi Pugliesi, a leading company in the plastic recycling industry located in Bari, Italy. The company produces low-density polyethylene (LDPE) regenerated granules from PSW used in agricultural and floricultural greenhouse activities and industrial packaging after a washing stage in the aqueous phase. The latter generates large volumes of wastewater, the conventional treatment of which is characterised by large quantities of sludge and the associated disposal problems. Under steady-state conditions, the SBBGR provided impressive removal efficiencies regarding the main gross parameters (over 90% for COD and TKN, over 99% for BOD, TSS, VSS and NH, and over 80% for TN) with a statistically better effluent quality than that of the conventional treatment. The SBBGR effluent quality was modelled in terms of washing water characteristics by using generalized additive models (GAMs). The SBBGR treatment was characterised by a specific sludge production five times lower than that of the conventional treatment (0.21 kg TSS vs. 1.0 kg TSS per m of wastewater treated). Compared with the conventional treatment, the proposed process showed a five-fold reduction in the cost of sludge disposal, which saved 50% of the operating cost.
基于序批式生物滤池颗粒反应器（SBBGR），评估了一种针对无害塑料固体废物（PSW）洗涤废水的高级处理方法的效果，主要考虑总参数、去除效率和污泥产量。还将所提出的处理方法与传统处理方法进行了比较，传统处理方法基于初级和二级处理，使用活性污泥工艺，由位于意大利巴里的塑料回收行业领先公司 Recuperi Pugliesi 执行。该公司从 PSW 中生产低密度聚乙烯（LDPE）再生颗粒，用于农业和花卉温室活动以及工业包装，PSW 在经过水相洗涤阶段后使用。后者会产生大量废水，传统处理方法的特点是产生大量污泥和相关的处置问题。在稳态条件下，SBBGR 对主要总参数（COD 和 TKN 的去除率超过 90%，BOD、TSS、VSS 和 NH 的去除率超过 99%，TN 的去除率超过 80%）提供了令人印象深刻的去除效率，并且其出水质量比传统处理方法统计学上更好。通过广义加性模型（GAMs），根据洗涤水特性对 SBBGR 出水质量进行建模。SBBGR 处理的特点是特定污泥产量比传统处理低五倍（0.21kg TSS 比每处理 1m 废水 1.0kg TSS）。与传统处理相比，该工艺的污泥处置成本降低了五倍，节省了 50%的运营成本。
