Erratum to: Int. J. Environ. Sci. Technol. (2017) 14:841–852 DOI 10.1007/s13762-017-1255-9

The term ‘HDW’ should be replaced by ‘HW’ throughout the article. ‘HW’ stands for ‘Hospital Wastewater’.

The term of "HDWs" should be replaced by "HWs" throughout the article.