Sewage water treatment involves the removal of impurities from sewage water and household wastewater.
Physical, biological and sometimes chemical methods are utilized to eradicate contaminants. The primary advantage of sewage water treatment lies in producing environmentally safe sewage water, referred to as effluent, along with solid waste known as sludge or biosolids, suitable for disposal or reuse. Reuse is often used for agricultural applications and more recently sludge is also being utilized as a fuel source.
Water released from manufacturing, agricultural, residential (toilets, baths, showers, kitchens, sinks), hospitals, commercial, and industrial locations is diminished in quality due to contaminating elements. The water carries pollutants such as organic wastes, suspended solids, bacteria, nitrates, and phosphates, necessitating their removal.
In order to ensure the safety of wastewater for reuse or environmentally friendly discharge, it is crucial to lower the concentration of contaminants to acceptable levels. This is where Sewage Water Treatment is essential.
1. Underground construction with compact design & completely covered plant
2. No foul odour in the vicinity of the STP area or in the surrounding environment
3. Minimal sludge generation
4. Durable UV resistant HDPE biofilm carriers
5. Does not necessitate constant monitoring and operation
6. Fully or semi-automatic controls
7. Operates efficiently with fluctuating greywater rates
8. The quality of the treated water falls within the permissible limit
9. Environmentally safe for the discharge of treated sewage water into land or water sources
10. The treated water is suitable for reuse in activities such as gardening, toilet flushing, landscaping, irrigation, and cooling towers etc.
What is the importance of having a Sewage Treatment Plant in a Farm House?
In the serene expanse of farmhouses, the significance of a Sewage Treatment Plant (STP) unfolds as a guardian of environmental harmony and self-sufficiency. Secluded from urban infrastructure, farmhouses grapple with decentralized sewage management, underscoring the pivotal role of on-site wastewater treatment. The STP emerges as a silent custodian, preserving the ecological integrity of surrounding landscapes by preventing the contamination of natural water bodies and preserving the fertility of the soil. Its transformative function converts sewage into treated effluent, fostering a cyclical system where reclaimed water nourishes the very fields it once exited, fostering sustainable agricultural practices.
Beyond its ecological mission, the installation of an STP is a strategic investment in regulatory compliance and future-proofing against environmental legalities. Shielding against potential legal consequences, it establishes the farmhouse as a responsible steward of the land, mitigating risks and demonstrating a commitment to environmental ethics. As a health ally, the STP stands guard, purifying wastewater to eliminate harmful pathogens, creating a safer environment for residents. Economically, the STP offers enduring benefits through reduced water consumption, lowered reliance on external sources, and avoidance of penalties, creating a holistic and sustainable living model for the farmhouse community.
Stages in the Treatment of Sewage/Wastewater
1. Preliminary Treatment: Preliminary treatment, also referred to as pre-treatment, is a physical wastewater treatment method. It involves screening, where bar screens are employed to eliminate large solids like rags, fabric, yarn, lint, twigs, and other debris that may cause damage to the plant's equipment. The wastewater then undergoes the physical treatment phase.
2. Primary Treatment: Involves physical and chemical methods in the treatment of wastewater. Upon pumping wastewater into the primary tank, an extended retention time allows heavier particles to settle at the bottom, while lighter particles rise to the top. Flocculation and coagulation are applied to eliminate settled and floatable debris, and the treated water proceeds to a secondary or biological treatment.
3. Secondary Treatment: Wastewater entering the secondary tank is free of physical particles and undergoes a biological treatment. Commonly employed methods for biological treatment in wastewater treatment plants (WTPs) and effluent treatment plants (ETPs) include aerated lagoons, activated sludge, trickling filters, and oxidation ponds, with the activated sludge process being the most adaptable biological oxidation technique. This stage achieves the removal of around 80% of organic waste, leading to subsequent tertiary treatment.
4. Tertiary Treatment: This stage uses physical, chemical, and biological processes to eliminate residual suspended solids, dissolved solids, and other contaminants not addressed in earlier treatment stages. Various disinfection agents like chlorine, ozone, and UV radiation are commonly utilised depending on the quality of the wastewater. After this treatment, the wastewater is prepared for disposal or potential reuse.