Biological Treatment of MSW Leachate and Domestic Wastewater Using Anaerobic Sludge Blanket Reactor

Author- Atun RoyChoudhury & Dr. V Arutchelvan

M.E. (Environmental Engg)

OCTOBER, 2016

Brief outline...

Overview. What is Biological treatment. Analysis of parameters. How we did it differently. Treatment workflow. Results & Discussion. Conclusion.

Overview... Sanitary sewerage systems

serve only a low percentage of the population.

In non sewer areas, more than 80% of the night soil is treated in septic tanks.

Therefore, using the biological leachate treatment plants to treat both MSW leachate and domestic waste water has been hashed out in this study.

Biological treatment... It involves analysis of

physico chemical properties.

Examination of operating parameters.

monitoring parameters.

experimental setup for bioreduction of leachate.

Analysis of parameters... pH, COD, HRT, Temperature,

co-substrate was determined for the samples.

pH meter, ELICO makes model LI 120, were used to determine the pH of the samples.

COD is a measure of the oxygen equivalent of organic matter .

HRT is defined as, the volume of the reactor to the volumetric flowrate.

Study area...

Solid wastes were collected freshly from omagulam dumping site by vehicles and dumped.

Leachates were collected from the land fill in which the solid wastes collected and dumped.

The seed sludge for reactors were collected from high rate anaerobic digester, which was treating distillery effluent located at M/s Sakthi Sugars Ltd. Appakoodal, Bhavani, Erode Dt. and M/s Sriram Narayana Sago Factory, namagripet, Rasipuram Tk, Namakkal Dt.

Methodology... VSS was found out by using a known volume of the sludge was

filtered through what-man filter paper no. 44. Volatile fatty Acid has been found by taking a sample of 100ml and

tirated against 0.1N NaOH, after adjusting the pH on 6.5. For TSS a known volume of the effluent was filtered through a

Whatman filter paper no. 44 and carried in a pre weighed silica crucible and evaporated to dryness by a heating device and then the crucible was again weighted.

Bio gas production was measured by water displacement method. The production of “5-day BOD test” as given in AOHA, 1992 was

adopted for estimating BOD5 for characterizing the effluent.

Upflow Anaerobic Sludge Blanket reactor (UASBR).

UASBR reactor was used in this work was drawn up of vertical polyacrylic rectangular shape tanks with internal working volume of 15L.

The elevation of the reactor is 3m in this working height was 2.4m with the width and breadth of 0.18m and 0.061m respectively.

The inlet of the reactor was at the bottom and the outlet was at the top.

This reactor contains four sampling ports for every 60cm

Cyclic Representation...

Sample collection

Preliminary analysis

Monitoring parameters

Anaerobic treatment

Testing of treated effluent

Result and Discussion

The waste water from septic tank was integrated with the MSW leachate to feed the UASBR as substrate.

Characteristics of the leachate

Infulent and effluent COD concentration during reactor start up period

COD removal efficiency obtained during reactor start up period

Percentage removal of MSW leachate

Various achievements after successful completion of the biological treatment process

pH for inlet & outlet of MSW leachate and domestic wastewater mixture (30:70)

Removal of COD for MSW leachate and domestic wastewater mixture (50:50)

TDS for inlet & outlet of MSW leachate and domestic wastewater mixture (50:50)

VFA for inlet and outlet of MSW leachate & domestic wastewater mixture (50:50)

Biogas collected during MSW leachate and domestic wastewater mixture (50:50) treatment

Conclusion...

The analysis report of domestic wastewater and MSW leachate revealed that both the characteristics were almost very similar.

In time, efficiency the start up period of the reactor was minimized up to 45days by seeding the reactor with starch based sludge.

The experimental results also demonstrate that the COD removal by variable HRT is almost up to 90%, whereas other parameters also decreased drastically.

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Interaction time...