PENGOLAHAN LIMBAH CAIR AGROINDUSTRI GULA - METODE FISIKA BIOLOGI

Summary

This video provides an in-depth look at the wastewater treatment process in the sugar industry. Nadia Silvia from the University of Lampung explains the steps involved, starting with the harvesting of sugarcane and the transport of the harvested crop to the factory. The focus then shifts to how the liquid waste from sugar production is processed. Key stages include bacterial cultivation, screening, aeration, sedimentation, and clarification. By the end of the process, the wastewater meets environmental standards with clear water and appropriate pH and temperature, ready for safe disposal. The entire process helps mitigate environmental impacts from sugar manufacturing.

Takeaways

• 😀 Introduction of the speaker: Nadia Silvia, a student from the Agricultural Industrial Technology program at the University of Lampung, Class of 2019.
• 😀 Overview of the topic: The speaker discusses the processing of liquid waste from the sugar industry in Indonesia.
• 😀 Sugarcane farming: After one year of planting, sugarcane can be harvested, and the stalks are cut down to allow regrowth.
• 😀 Harvesting process: Sugarcane is collected by a grab loader and transported to the factory by trucks, each capable of carrying 15 tons of sugarcane.
• 😀 Sugar production: For every ton of sugarcane, the average output is between 165 and 1,100 liters of liquid waste, which is a byproduct of the sugar production process.
• 😀 Sources of liquid waste: The liquid waste originates from several sources, including oil leaks, evaporating water from boilers, and condenser water.
• 😀 Process flow of waste treatment: The liquid waste undergoes several stages, including bacterial seeding, screening, equalization, aeration, sedimentation, and clarification.
• 😀 Use of bacteria: Specific bacteria such as Bacillus pseudomonas, Aerobacter, Azotobacter, and Saccharomyces are used in the treatment to break down organic matter.
• 😀 Screening stage: Large particles are filtered out during the screening process, leaving behind clearer liquid waste for further treatment.
• 😀 Aeration process: Aerobic conditions are maintained in four aeration ponds to reduce organic matter and bring it to acceptable levels.
• 😀 Clarification and sedimentation: After aeration, the treated liquid is passed through clarifiers for separation of solids and liquids, with excess solids returned to sedimentation.
• 😀 Final results: The treated liquid waste meets environmental standards, with clear water, appropriate pH levels (7-9), and low CO2 content.

Q & A

What is the main topic discussed in the transcript?

The main topic is the processing of liquid waste from the sugar industry in Indonesia.

Who is presenting the information in the transcript?

The presenter is Nadia Silvia, a student from the Agricultural Industrial Technology Program at the University of Lampung.

What is the initial step in the sugar cane harvest process?

The initial step involves cutting the sugar cane to the ground so that the remaining parts of the stalk can grow back for the next harvest.

How much sugar cane is harvested per year on average?

The sugar cane harvest can reach 3.5 tons per year.

How is the harvested sugar cane transported to the factory?

The sugar cane is transported using a grab loader, which loads the cane onto trucks. Each truck can carry up to 15 tons of sugar cane.

What is the approximate amount of liquid waste generated during sugar production?

The liquid waste generated during sugar production is approximately 165 to 1100 liters per ton of sugar produced.

Where does the liquid waste come from in the sugar industry?

The liquid waste comes from various sources such as oil or grease from the milling units, leaks from the units, water evaporation from the boilers, and condensate water.

What is the first step in the treatment of liquid waste?

The first step in the treatment process is the cultivation of bacteria, specifically Legionella bacteria, which helps in breaking down the waste.

What happens during the screening process in liquid waste treatment?

The screening process filters out large particles, resulting in liquid waste that is free from large debris.

What role does aeration play in liquid waste treatment?

Aeration is used to reduce organic substances in the liquid waste by introducing oxygen, and it is done aerobically with the help of four aeration ponds.

What are the characteristics of the treated liquid waste?

The treated liquid waste has clear water, a pH within the standard range of 7-9, a temperature of 20-40°C, and meets quality standards for CO2 and other parameters.