MOSES BASITERE 13th IWA Specialized conference on small water and - - PowerPoint PPT Presentation

MOSES BASITERE

13th IWA Specialized conference on small water and wastewater Systems (SWWS)

TREATMENT OF POULTRY SLAUGHTERHOUSE WASTEWATER USING A STATIC GRANULAR BED REACTOR COUPLED WITH UF MEMBRANES

Presentation outline

Background The big picture Water stress in South Africa Core motives/Objectives of the study Literature Review Results and Discussion Conclusion and Recommendations

Background

• Poultry slaughterhouse consume large quantities of fresh water to

ensure production of hygienically safe poultry products.

• This result in generation of high strength wastewater which contain

high levels of COD, BOD, TSS, FOG, and nutrients.

• The wastewater generated doesn’t meet SA government’s industrial

wastewater discharge standards.

• If this wastewater is untreated, it pose severe risks to municipal sewer

systems and the environment.

The big picture

Water stress

The country must conserve its water resources and also treat its degraded water resource

Core motives/ objectives

Meet discharge standards Lower discharge cost Zero liquid Effluent discharge Water re-use ISO - 14001

Literature review

Treatment method COD (mg/L) BOD (mg/L) TSS (mg/L) FOG (mg/L) TP (mg/L) TN (mg/L) References EGSB Membrane filtration Hybrid-UASB UF membrane SGBR & SASBR DAF & UASB DAF & UASB UASB 2133-4137 1300-3772 3000-4800 3610-4180 775-2100 2060-4380 2360-4690 5800-11,600 1100-2750 200-2341 750-1890 1900-2200

• 1559-2683

1190-2624 4524-8700 315-1273 200-2446 300-950 2280-2446 1850-3750 480-1230 640-1213 726-1462 131-684 100-970 800-1385 289-389

• 131-261

249-702 147-666 8-27 14-50 16-32

• 5.8-12.1
• 33-128

7.17-12.74

• 16-165
• 190-475
• 20-68

10.5-11,150 Basitere et al., 2016 Abboah-Afari, 2011 Rajakumar et al., 2011 Yordanov, 2010 Debik & Coskun, 2009 De Nardi et al., 2008 Del Nery et al., 2007 Chavez et al., 2005

Poultry slaughterhouse wastewater characteristics

Table 1: Typical poultry slaughterhouse wastewater characteristics according to literature

Static Granular Sludge Bed Reactor &UF membranes

BIOGAS FEED GRANULES BACKWASH VALVE BACKWASH VALVE BACKWASH VALVE OVERFLOW LINE PRODUCT SGBR PRODUCT TANK BIOGAS METER METHANE THERMOSTATIC WATER BATH PEA GRAVEL SGBR FEED TANK HOT WATER CIRCULATION HOT WATER CIRCULATION UF MEMBRANE 1 PERMEATE TANK UF MEMBRANE 2 PERMEATE TANK PERISTALTIC PUMP SIEVE UF MEMBRANE 1 UF MEMBRANE 2 FEED PERMEATE PERMEATE

Static Granular Sludge Bed Reactor

• perating conditions

Operating conditions (HRT and OLR) for the SGBR system over a period of 64 days

Dilution (%) Operating Time (days) Flow rate (L/h) HRT (hrs) OLR (g COD/Lday)

50 67 None None 1-19 20-28 29-44 45-64 0.0278 0.0278 0.0278 0.0383 55 55 55 40 0.56 0.67 1.73 3.14

Static Granular Sludge Bed Reactor Average SGBR Feed

Results and discussions SGBR COD removal

10 20 30 40 50 60 70 80 90 100 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 10 20 30 40 50 60 Operating Time (days) COD Removal (%) COD (mg/L.d) SGBR Feed COD SGBR Product COD CCT By-Law Discharge Limit COD Removal

50% dilution 67% dilution HRT: 55 HRT: 55 HRT: 55 OLR: 0.56 OLR: 0.67 OLR: 1.73 HRT: 40 OLR: 3.14

Overall COD Removal = 93 %

Results and discussions SGBR TSS Removal

10 20 30 40 50 60 70 80 90 100 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 10 20 30 40 50 60 TSS Removal (%) TSS (mg/L) Operating Time (days) SGBR Feed TSS SGBR Product TSS TSS Removal

50% dilution 67% dilution No dilution HRT: 55 HRT: 55 HRT: 55 OLR: 0.56 OLR: 0.67 OLR: 1.73 No dilution HRT: 40 OLR: 3.14

Overall TSS Removal = 95%

Results and discussions VFA/ALKALINITY RATIO VFA/ALK Ratio = 0.01 to 0.14

0,00 0,02 0,04 0,06 0,08 0,10 0,12 0,14 0,16 1 2 3 4 5 6 7 8 17 22 27 32 37 42 47 52 VFA/Alkalinity Ratio pH Operating Time (days) SGBR product pH VFA/Alkalinity Ratio

Results and discussion U-F membranes

Parameter Units Average SGBR Product Averaged UF Permeate Average Retention (%) COD mg/L 162 59 64 TSS mg/L 29 4 88 FOG mg/L 60 31 29

Results and discussion Overall perfomance SGBR TO UF

Parameter Units Averaged SGBR Feed Averaged UF Permeate Overall % Removal

• COD
• mg/L
• 4681

59 98.7

• TSS
• mg/L
• 2651

4 99.8 FOG mg/L

• 406

31 92.4

SGBR FEED SGBR product and UF

Conclusion and recomendations

• The bench-scale SGBR anaerobic digester coupled with UF membranes was successfully

employed for treating poultry slaughterhouse wastewater under mesophilic conditions and different organic loading rates.

• The average COD, TSS and FOG removal efficiencies for the SGBR system was greater

90% over a period of 64 days.

• The UF membranes used as a post-treatment for the SGBR product showed an average

COD, TSS and FOG removal of 63%, 88% and 29%, respectively

• The overall COD, TSS and FOG removal of the coupled SGBR and UF membranes was

greater than 90 %.

THANK - YOU

City of Cape Town By-Law (2013) and SANS 241-1: 2011 parameter discharge standards[2]

DWA 2010 SANS241 WCape Mangaug Parameter Units General limit Operational limits Not to exceed

• peration limits

Temperature at point of Entry

• C

40 44 Conductivity ms/m 70-150 <150 500 pH at 25 5.5-9.5 5.5-9.5 12 10 COD mg/L 75 5000 SS mg/L 25 1000 TDS at 1050C mg/L <1000 4000 Total sulphates (SO4

mg/L <400 1500 1500 O&G mg/L 2.5 400 400 TP mg/L 10 25 Faecal coliforms(per 100ml) 1000 Turbidity NTU <1.0 Amonia as Nitrogen mg/l <1.0 DOC mg/l <10 Nitrates mg/l 15