Junardokham, Achmad Abiyyu Yusuf Sinatrya (2027) Biokoagulan dari Daun Mangrove Sebagai Koagulan Limbah Cair Industri Tahu. Undergraduate thesis, UPN Veteran Jawa Timur.
![[img]](https://repository.upnjatim.ac.id/style/images/fileicons/text.png) |
Text (COVER)
21031010088-cover.pdf Download (2MB) |
|
Text (BAB I)
21031010088-bab1.pdf Download (286kB) |
|
Text (BAB II)
21031010088-bab2.pdf Restricted to Repository staff only until 2 November 2027. Download (326kB) |
|
Text (BAB III)
21031010088-bab3.pdf Restricted to Repository staff only until 2 November 2027. Download (447kB) |
|
Text (BAB IV)
21031010088-bab4.pdf Restricted to Repository staff only until 2 November 2027. Download (327kB) |
|
Text (BAB V)
21031010088-bab5.pdf Download (279kB) |
|
Text (DAFTAR PUSTAKA)
21031010088-daftar pustaka.pdf Download (261kB) |
|
Text (LAMPIRAN)
21031010088-lampiran.pdf Restricted to Repository staff only Download (1MB) |
Abstract
Bio-coagulants are natural coagulant agents derived from plant biomass that function to reduce turbidity and organic content in wastewater through charge neutralization and floc formation. This study utilized mangrove leaves (Rhizophora sp.) as a tannin source for bio-coagulants in tofu industry wastewater treatment. Tannin extraction was carried out using the sonication–maceration method with 96% ethanol as the solvent. Variations of leaf powder mass (10, 20, 30, 40, and 50 g) and sonication duration (20, 40, 60, 80, and 100 minutes at 20 kHz frequency) were applied before maceration for 48 hours. The filtrate was evaporated at 80 °C to remove the solvent, and the tannin content was determined by KMnO₄ titration. The highest tannin yield (10.78%) was obtained under the condition of 50 g leaf mass and 100 minutes of sonication, and this extract was subsequently used as a coagulant for tofu wastewater (initial pH 3.59). The coagulation process was conducted through rapid and slow mixing, followed by sedimentation. After treatment, BOD decreased from 1,761.39 to 1,326.49 mg/L (24.7% efficiency), COD decreased from 8,756.22 to 6,208.96 mg/L (29.1%), while TSS increased from 365 to 545 mg/L due to floc formation. The pH slightly increased to 3.71. These results indicate that tannins from mangrove leaves have the potential to act as a natural bio-coagulant for reducing the organic load in tofu wastewater, although the efficiency remains lower than that of chemical coagulants (alum). Further optimization strategies may include combining tannins with mild inorganic coagulants and adjusting the pH to enhance flocculation efficiency.
| Item Type: | Thesis (Undergraduate) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Contributors: |
|
||||||||
| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Achmad Abiyyu Yusuf | ||||||||
| Date Deposited: | 04 Nov 2025 05:03 | ||||||||
| Last Modified: | 04 Nov 2025 05:03 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/45971 |
Actions (login required)
 |
View Item |