Environmental & Effluent Design interview questions

1. A.recovery train of pre-treatment, RO, multiple-effect or MVR evaporator and crystalliser so no liquid effluent leaves site, mandated in textile and distillery clusters
2. B.sequence of screening, equalisation, neutralisation, primary clarification, biological treatment (ASP or MBBR), secondary clarification and tertiary polishing
3. C.thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow
4. D.CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks

Answer + AI explanation with Pro

1. A.VOC control options
2. B.Hazardous and Other Wastes Rules 2016
3. C.BOD vs COD
4. D.ETP unit operations

Answer + AI explanation with Pro

1. A.ETP unit operations — CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
2. B.ETP unit operations — BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
3. C.ETP unit operations — recovery train of pre-treatment, RO, multiple-effect or MVR evaporator and crystalliser so no liquid effluent leaves site, mandated in textile and distillery clusters
4. D.ETP unit operations — sequence of screening, equalisation, neutralisation, primary clarification, biological treatment (ASP or MBBR), secondary clarification and tertiary polishing

Answer + AI explanation with Pro

1. A.BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
2. B.CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
3. C.MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
4. D.recovery train of pre-treatment, RO, multiple-effect or MVR evaporator and crystalliser so no liquid effluent leaves site, mandated in textile and distillery clusters

Answer + AI explanation with Pro

1. A.Stack height
2. B.BOD vs COD
3. C.EIA Notification 2006
4. D.ETP unit operations

Answer + AI explanation with Pro

1. A.BOD vs COD — BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
2. B.BOD vs COD — MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
3. C.BOD vs COD — CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
4. D.BOD vs COD — thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow

Answer + AI explanation with Pro

1. A.inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L
2. B.recovery train of pre-treatment, RO, multiple-effect or MVR evaporator and crystalliser so no liquid effluent leaves site, mandated in textile and distillery clusters
3. C.thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow
4. D.sequence of screening, equalisation, neutralisation, primary clarification, biological treatment (ASP or MBBR), secondary clarification and tertiary polishing

Answer + AI explanation with Pro

1. A.Stack height
2. B.Wet scrubber
3. C.EIA Notification 2006
4. D.CPCB general discharge limits

Answer + AI explanation with Pro

1. A.CPCB general discharge limits — packed or venturi tower where gas contacts caustic or water to absorb acid gases such as HCl, SO2 and Cl2 with removal typically above 95%
2. B.CPCB general discharge limits — inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L
3. C.CPCB general discharge limits — MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
4. D.CPCB general discharge limits — BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test

Answer + AI explanation with Pro

1. A.BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
2. B.CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
3. C.recovery train of pre-treatment, RO, multiple-effect or MVR evaporator and crystalliser so no liquid effluent leaves site, mandated in textile and distillery clusters
4. D.rules requiring SPCB authorisation, manifest tracking, a 90-day storage limit and disposal to an authorised TSDF or co-processing

Answer + AI explanation with Pro

1. A.Zero liquid discharge
2. B.CPCB general discharge limits
3. C.Stack height
4. D.Wet scrubber

Answer + AI explanation with Pro

1. A.Zero liquid discharge — inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L
2. B.Zero liquid discharge — BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
3. C.Zero liquid discharge — recovery train of pre-treatment, RO, multiple-effect or MVR evaporator and crystalliser so no liquid effluent leaves site, mandated in textile and distillery clusters
4. D.Zero liquid discharge — rules requiring SPCB authorisation, manifest tracking, a 90-day storage limit and disposal to an authorised TSDF or co-processing

Answer + AI explanation with Pro

1. A.thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow
2. B.inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L
3. C.CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
4. D.MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance

Answer + AI explanation with Pro

1. A.BOD vs COD
2. B.Stack height
3. C.ETP unit operations
4. D.EIA Notification 2006

Answer + AI explanation with Pro

1. A.Stack height — MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
2. B.Stack height — CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
3. C.Stack height — packed or venturi tower where gas contacts caustic or water to absorb acid gases such as HCl, SO2 and Cl2 with removal typically above 95%
4. D.Stack height — inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L

Answer + AI explanation with Pro

1. A.packed or venturi tower where gas contacts caustic or water to absorb acid gases such as HCl, SO2 and Cl2 with removal typically above 95%
2. B.MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
3. C.sequence of screening, equalisation, neutralisation, primary clarification, biological treatment (ASP or MBBR), secondary clarification and tertiary polishing
4. D.thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow

Answer + AI explanation with Pro

1. A.EIA Notification 2006
2. B.Zero liquid discharge
3. C.Wet scrubber
4. D.BOD vs COD

Answer + AI explanation with Pro

1. A.Wet scrubber — BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
2. B.Wet scrubber — MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
3. C.Wet scrubber — packed or venturi tower where gas contacts caustic or water to absorb acid gases such as HCl, SO2 and Cl2 with removal typically above 95%
4. D.Wet scrubber — recovery train of pre-treatment, RO, multiple-effect or MVR evaporator and crystalliser so no liquid effluent leaves site, mandated in textile and distillery clusters

Answer + AI explanation with Pro

1. A.BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
2. B.inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L
3. C.CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
4. D.thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow

Answer + AI explanation with Pro

1. A.CPCB general discharge limits
2. B.ETP unit operations
3. C.VOC control options
4. D.BOD vs COD

Answer + AI explanation with Pro

1. A.VOC control options — MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
2. B.VOC control options — thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow
3. C.VOC control options — rules requiring SPCB authorisation, manifest tracking, a 90-day storage limit and disposal to an authorised TSDF or co-processing
4. D.VOC control options — inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L

Answer + AI explanation with Pro

1. A.BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
2. B.packed or venturi tower where gas contacts caustic or water to absorb acid gases such as HCl, SO2 and Cl2 with removal typically above 95%
3. C.MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
4. D.rules requiring SPCB authorisation, manifest tracking, a 90-day storage limit and disposal to an authorised TSDF or co-processing

Answer + AI explanation with Pro

1. A.CPCB general discharge limits
2. B.Zero liquid discharge
3. C.EIA Notification 2006
4. D.Hazardous and Other Wastes Rules 2016

Answer + AI explanation with Pro

1. A.EIA Notification 2006 — inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L
2. B.EIA Notification 2006 — packed or venturi tower where gas contacts caustic or water to absorb acid gases such as HCl, SO2 and Cl2 with removal typically above 95%
3. C.EIA Notification 2006 — rules requiring SPCB authorisation, manifest tracking, a 90-day storage limit and disposal to an authorised TSDF or co-processing
4. D.EIA Notification 2006 — MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance

Answer + AI explanation with Pro

1. A.sequence of screening, equalisation, neutralisation, primary clarification, biological treatment (ASP or MBBR), secondary clarification and tertiary polishing
2. B.thermal or catalytic oxidiser, activated carbon adsorption, condensation or vapour recovery unit, chosen by concentration and flow
3. C.BOD5 is oxygen consumed by microbes over five days at 20 °C; COD measures all chemically oxidisable matter and is always higher and quicker to test
4. D.rules requiring SPCB authorisation, manifest tracking, a 90-day storage limit and disposal to an authorised TSDF or co-processing

Answer + AI explanation with Pro

1. A.VOC control options
2. B.EIA Notification 2006
3. C.ETP unit operations
4. D.Hazardous and Other Wastes Rules 2016

Answer + AI explanation with Pro

1. A.Hazardous and Other Wastes Rules 2016 — MoEFCC rule classing projects as Category A (central appraisal) or B (state SEIAA), requiring scoping, public hearing and EMP for prior environmental clearance
2. B.Hazardous and Other Wastes Rules 2016 — inland surface water norms of pH 5.5–9, BOD 30 mg/L, COD 250 mg/L, TSS 100 mg/L and oil and grease 10 mg/L
3. C.Hazardous and Other Wastes Rules 2016 — CPCB rule H = 14·Q^0.3 metres for SO2 emissions with Q in kg/h, subject to a minimum of 30 m for process stacks
4. D.Hazardous and Other Wastes Rules 2016 — rules requiring SPCB authorisation, manifest tracking, a 90-day storage limit and disposal to an authorised TSDF or co-processing

Answer + AI explanation with Pro