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Treating and reusing wastewater generated by the washing operations in the non-hazardous plastic solid waste recycling process: Advanced method vs. conventional method
- Source :
- Journal of environmental management 284 (2021)., info:cnr-pdr/source/autori:Valerio Guido Altieri, Marco De Sanctis, Damiano Sgherza, Simona Pentassuglia, Emanuele Barca, Claudio Di Iaconi/titolo:Treating and reusing wastewater generated by the washing operations in the non-hazardous plastic solid waste recycling process: Advanced method vs. conventional method/doi:/rivista:Journal of environmental management/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume:284
- Publication Year :
- 2020
-
Abstract
- 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 BOD5, TSS, VSS and NH3, 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 m3 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.
- Subjects :
- Environmental Engineering
Municipal solid waste
Plastic recycling
0208 environmental biotechnology
02 engineering and technology
010501 environmental sciences
Management, Monitoring, Policy and Law
SBBGR
Wastewater
Solid Waste
01 natural sciences
Waste Disposal, Fluid
Water Purification
Bioreactors
Plastic recycling process
Hazardous waste
Waste Management and Disposal
Effluent
Sludge production
Operating cost
0105 earth and related environmental sciences
Wastewater recycling
Sewage
General Medicine
Washing water treatment
Pulp and paper industry
020801 environmental engineering
Activated sludge
Italy
Biofilter
Environmental science
Plastics
Subjects
Details
- ISSN :
- 10958630
- Volume :
- 284
- Database :
- OpenAIRE
- Journal :
- Journal of environmental management
- Accession number :
- edsair.doi.dedup.....db5e6df9fe1f89cb6b36a7d28d528c19