Anaerobic mono and co-digestion of food waste and palm oil mill effluent for phosphorus recovery
Anaerobic digestion (AD) is a process by which microorganisms break down biodegrable material in the absence of oxygen. The process involves hydrolysis, acedogenesis and methanogensis stages. This technology have gained interests as a technique to recover resources such as energy and nutrient. Ad...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2016
|
| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/17503/1/Anaerobic%20mono%20and%20co-digestion.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
my-ums-ep.17503 |
|---|---|
| record_format |
uketd_dc |
| spelling |
my-ums-ep.175032017-11-20T02:15:53Z Anaerobic mono and co-digestion of food waste and palm oil mill effluent for phosphorus recovery 2016 Rafidah Selaman TD Environmental technology. Sanitary engineering Anaerobic digestion (AD) is a process by which microorganisms break down biodegrable material in the absence of oxygen. The process involves hydrolysis, acedogenesis and methanogensis stages. This technology have gained interests as a technique to recover resources such as energy and nutrient. Additionally, it can help in reducing waste volume as well as greenhouse gases. To improve the production of anaerobic digestion products, co-digestion of different substrates is being introduced. The benefits of co-digestion are to increase the efficiency of digestion process as the co-substrates can supply the missing nutrient in the main substrates. So far, there are no studies have been carried out for applications of anaerobic co-digestion of food waste (FW) with palm oil mill effluent (POME) to recover phosphorus. FW is a type of municipal solid wastes which abundantly available. It has high organic content and can cause various environmental problems if disposed on landfill. While POME is a largest wastewater produced by palm oil mill industry that contain significant nutrient content. It has been reported that phosphorus is a limited and non-renewable mineral source that is essential in our daily life especially for agricultural industry as fertilizers. Therefore, this study aims to investigate phosphorus recovery from FW using anaerobic co-digestion with POME. The physicochemical properties of the samples were determined to study the suitability to be used in anaerobic digestion. The results showed that the total solids and volatile solid of FW and POME were 15%, 3% and 94% and 68%, respectively. pH were, 3 and 5, respectively. These results suggested that FW and POME were appropriate to undergo anaerobic co-digestion for phosphorus recovery. The anaerobic digestion was performed using batch anaerobic digester at mesophilic condition at 37°C (± 1) and pH between 6.8-7.2. Mono-digestion of single FW and POME was carried out to investigate phosphorus recovery at different digestion period for 40 days. It was found the optimum days to recover phosphorus was within 30 days with 89% and 77%, phosphorus recovery from FW and POME, respectively. Therefore, the co-digestion was performed for 30 days at different ratios of FW to POME, namely 70:30% and 30:70%. The results showed co-digestion increased phosphorus recovery to 183-247%, compared to mono-digestion, with 70:30 (FW:POME) was the highest, followed by 30:70 (FW:POME), 100% FW and 100% POME with percentages 247%, 183%, 89% and 77%, respectively. When expressed in mg P/g, the values were, 6.70 mg P/g, 3.00 mg P/g, 4.90 mg P/g and 0.68 mg P/g, respectively. From the results, this study suggested that phosphorus recovery can be improved using co-digestion with FW as the main substrates and POME was a suitable co-substrate in anaerobic co-digestion. While the waste reduction was presented by total solid and volatile solid reduction with 41% and 45%, respectively from the result. 2016 Thesis https://eprints.ums.edu.my/id/eprint/17503/ https://eprints.ums.edu.my/id/eprint/17503/1/Anaerobic%20mono%20and%20co-digestion.pdf text en public other masters Universiti Malaysia Sabah Faculty of Science and Natural Resources |
| institution |
Universiti Malaysia Sabah |
| collection |
UMS Institutional Repository |
| language |
English |
| topic |
TD Environmental technology Sanitary engineering |
| spellingShingle |
TD Environmental technology Sanitary engineering Rafidah Selaman Anaerobic mono and co-digestion of food waste and palm oil mill effluent for phosphorus recovery |
| description |
Anaerobic digestion (AD) is a process by which microorganisms break down
biodegrable material in the absence of oxygen. The process involves hydrolysis,
acedogenesis and methanogensis stages. This technology have gained interests as
a technique to recover resources such as energy and nutrient. Additionally, it can
help in reducing waste volume as well as greenhouse gases. To improve the
production of anaerobic digestion products, co-digestion of different substrates is
being introduced. The benefits of co-digestion are to increase the efficiency of
digestion process as the co-substrates can supply the missing nutrient in the main
substrates. So far, there are no studies have been carried out for applications of
anaerobic co-digestion of food waste (FW) with palm oil mill effluent (POME) to
recover phosphorus. FW is a type of municipal solid wastes which abundantly
available. It has high organic content and can cause various environmental
problems if disposed on landfill. While POME is a largest wastewater produced by
palm oil mill industry that contain significant nutrient content. It has been reported
that phosphorus is a limited and non-renewable mineral source that is essential in
our daily life especially for agricultural industry as fertilizers. Therefore, this study
aims to investigate phosphorus recovery from FW using anaerobic co-digestion
with POME. The physicochemical properties of the samples were determined to
study the suitability to be used in anaerobic digestion. The results showed that the
total solids and volatile solid of FW and POME were 15%, 3% and 94% and 68%,
respectively. pH were, 3 and 5, respectively. These results suggested that FW and
POME were appropriate to undergo anaerobic co-digestion for phosphorus
recovery. The anaerobic digestion was performed using batch anaerobic digester
at mesophilic condition at 37°C (± 1) and pH between 6.8-7.2. Mono-digestion of
single FW and POME was carried out to investigate phosphorus recovery at
different digestion period for 40 days. It was found the optimum days to recover
phosphorus was within 30 days with 89% and 77%, phosphorus recovery from FW
and POME, respectively. Therefore, the co-digestion was performed for 30 days at
different ratios of FW to POME, namely 70:30% and 30:70%. The results showed
co-digestion increased phosphorus recovery to 183-247%, compared to mono-digestion,
with 70:30 (FW:POME) was the highest, followed by 30:70 (FW:POME),
100% FW and 100% POME with percentages 247%, 183%, 89% and 77%,
respectively. When expressed in mg P/g, the values were, 6.70 mg P/g, 3.00 mg
P/g, 4.90 mg P/g and 0.68 mg P/g, respectively. From the results, this study
suggested that phosphorus recovery can be improved using co-digestion with FW
as the main substrates and POME was a suitable co-substrate in anaerobic co-digestion.
While the waste reduction was presented by total solid and volatile solid
reduction with 41% and 45%, respectively from the result. |
| format |
Thesis |
| qualification_name |
other |
| qualification_level |
Master's degree |
| author |
Rafidah Selaman |
| author_facet |
Rafidah Selaman |
| author_sort |
Rafidah Selaman |
| title |
Anaerobic mono and co-digestion of
food waste and palm oil mill effluent
for phosphorus recovery |
| title_short |
Anaerobic mono and co-digestion of
food waste and palm oil mill effluent
for phosphorus recovery |
| title_full |
Anaerobic mono and co-digestion of
food waste and palm oil mill effluent
for phosphorus recovery |
| title_fullStr |
Anaerobic mono and co-digestion of
food waste and palm oil mill effluent
for phosphorus recovery |
| title_full_unstemmed |
Anaerobic mono and co-digestion of
food waste and palm oil mill effluent
for phosphorus recovery |
| title_sort |
anaerobic mono and co-digestion of
food waste and palm oil mill effluent
for phosphorus recovery |
| granting_institution |
Universiti Malaysia Sabah |
| granting_department |
Faculty of Science and Natural Resources |
| publishDate |
2016 |
| url |
https://eprints.ums.edu.my/id/eprint/17503/1/Anaerobic%20mono%20and%20co-digestion.pdf |
| _version_ |
1747836448214614016 |