Residuals of industrial wastewater treatment

This presentation describes the residuals generated from industries. The residue management plan and its disposal options based on the type of residuals.

1. RESIDUALS OF INDUSTRIAL WASTEWATER TREATMENT P18EEE0006 – INDUSTRIAL WASTEWATER TREATMENT -presented by VIJAYA SUBRAMANIAM P R M.E Environmental Engineering Kumaraguru College of Technology, Coimbatore.

2. RESIDUALS Wastewater treatment plant produces a wide variety of waste products while treating water. These residuals may be organic and inorganic compounds in liquid, solid, and gaseous forms. It depends on the source of raw water, its characteristics and the type of treatment processes.

3. Major Residuals From Wastewater Treatment Plant SLUDGE : Sedimentation, Coagulation, Filter backwashing operations. CONCENTRATE (Brines) : Membrane reject water and spent backwash. Ion exchange resins, spent granular activated carbon (GAC), and spent filter media. AIR EMISSION : from aeration tank, VOC’s other gaseous pollutants like methane, ammonia and hydrogen sulphide in the air surrounding the waste treatment.

4. RESIDUAL MANAGEMENT PLAN

5. DISPOSAL OPTION DEPENDS ON: Waste characteristics. Liquid or solid Type and concentration of contaminants Classification of waste Regulatory requirement. Disposal facilities.

6. DISPOSAL OPTION RESIDUALS Direct Discharge Discharge to Treatment Facilities Underground Injection Landfill Liquids Sludge Spent Resins/Media Spent Membranes

7. No No No No No Yes Is there access to a receiving body? Is underground injection available? Does the liquid meet POTW discharge requirements ? Will the POTW accept the residual waste? Is discharge to a POTW the most cost- effective or practical (or only) option? Secure a permit from the state. Discharge to POTW. Secure a permit from the state. Direct discharge. Would the system’s discharge cause interference at the POTW? Is direct discharge the m ost cost- effective or practical (or only) option? Does the liquid meet direct discharge requirements ? Is the liquid considered radioactive and/or hazardous ? Yes Yes Yes No Yes Yes Yes No No Is there access to POTW? Would injection to well be the most cost-effective or practical (or / only) option? Yes No Yes No Yes W aste minimization methods or other disposal options. No Yes LIQUID RESIDUAL DISPOSAL Discharge to Injection well . Inject into class V injection wells. Inject into class I injection wells.

8. Identify the quality and quantity of the residual Are there free liquids ? Use intermediate processing to separate out the liquids Dispose in a hazardous waste landfill Dispose in a municipal landfill Sludge, Resin, Granular Media, Spent Membranes Does the waste contain radionuclides? Yes Dispose of liquid residuals Dispose in a industrial, hazardous waste, radioactive waste landfill . Does the waste contain radionuclides? No Is the waste hazardous? No SOLIDS RESIDUAL DISPOSAL No No Yes Yes Dispose in a landfill licensed to accept radioactive and hazardous waste Yes

9. REFERENCE WASTEWATER TREATMENT PLANT RESIDUAL MANAGEMENT http://www.nesc.wvu.edu/pdf/dw/publications/ontap/2009_tb/water_treatment_DWFSOM49.pdf INDUSTRIAL WASTE TREATMENT HANDBOOK. INDUSTRIAL WASTE MANAGEMENT, TREATMENT AND DISPOSAL MANUAL.