All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
of 12

Please download to get full document.

View again

  Appendix ATables  Volume 4Appendix A - TablesMalaysian SewerageIndustry Guidelines214  Appendix AVolume 4215Sewage Treatment Plants Appendix A Tables Table A1 Contaminants of Concern in Sewage TreatmentTable A2 Typical Composition of Untreated Domestic SewageTable A3 Major Biological Treatment Processes Used for Sewage TreatmentTable A4 Interim National River Water Quality Standards for MalaysiaTable A5 River ClarificationTable A6 The Occupational Safety and Health Act 514, 1994 – Brief Summary of ContentsTable A7 Permissible limits for potentially toxic elements in soilTable A8 Options for disposal of Sludge and reuse of biosolids  Volume 4Appendix A - TablesMalaysian SewerageIndustry Guidelines216 ContaminantsReason for Concern Suspended solids Suspended solids can lead to the development of sludge deposits and anaerobic conditions when untreated sewage is discharged in the aquatic environment. Biodegradable organics Composed principally of proteins, carbohydrates and fats, biodegradable organics are measured most commonly in terms of BOD (biochemical oxygen demand). If discharged untreated to the environment, their biological stabilisation can lead to the depletion of natural oxygen resources and to the development of septic conditions. Pathogens Communicable diseases can be transmitted by the pathogenic organisms in sewage. Nutrients Both nitrogen and phosphorus, along with carbon, are essential nutrients for growth. When discharged to the aquatic environment, these nutrients can lead to the growth of undesirable aquatic life. When discharged in excessive amounts on land, they can also lead to the pollution of groundwater. Refractory organics These organics tend to resist conventional methods of sewage treatment. Typical examples include surfactants, phenols and agricultural pesticides. Heavy metals Heavy metals are usually added to sewage from commercial and industrial activities and may have to be removed if the sewage is to be reused. Dissolved inorganic solids Inorganic constituents such as calcium, sodium and sulphate are added to the srcinal domestic water supply as a result of water use and may have to be removed if the sewage is to be reused. Table A1 Contaminants of Concern in Sewage Treatment
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks