Water governance in peri-urban areas

Statement 1 is correct. National Ganga River Basin Authority (NGRBA) is the financing, planning, implementing, monitoring, and coordinating authority for the Ganges River, functioning under the Jal Shakti Ministry. Statement 2 is correct. The mission of the organisation is to safeguard the drainage basin which feeds water into the Ganges by protecting it from pollution or overuse. In July 2014, the NGRBA has been transferred from the Ministry of Environment and Forests to the Ministry of Jal Shakti. Statement 3 is incorrect. The Prime Minister is the chair of the Authority.
Other members include the cabinet ministers of ministries that include the Ganges among their direct concerns and the chief ministers of states through which the Ganges River flows.

* Solid Waste Management Rules, 2016 mandate the segregation of waste into three categories - biodegradables, dry recyclables (plastic, paper, metal, etc.), and domestic hazardous waste (diapers, napkins, etc.). * The SWM Rules, 2016 apply not just to urban areas but also to urban local bodies, notified areas, census towns, all industrial townships, special economic zones, State and Central government organisations, places of pilgrimage, religious and historical importance. * There is no restriction on moving waste from one district to another. Waste generators can transport waste as needed for disposal, treatment, or processing. * Waste processing facilities will have to be set up by all local bodies having a population of 1 million or more within two years. * For census towns with a population below 1 million or all local bodies having a population of 0.5 million or more, common, or stand-alone sanitary landfills will have to be set up in three years. * Also, common, or regional sanitary landfills to be set up by all local bodies and census towns with a population under 0.5 million will have to be completed in three years.

* Membrane Bioreactors are often discussed in the context of: D. Wastewater treatment technologies. * Membrane Bioreactors (MBRs) combine a membrane process like microfiltration or ultrafiltration with a biological wastewater treatment process. * They are used to improve the quality of treated wastewater and are known for their efficiency in removing contaminants.

* Agricultural residues: These include materials like crop stalks, husks, and leaves. They are a viable source of biomass that can be converted into biofuels, including Sustainable Aviation Fuel (SAF). * Corn grain: Corn grain is a source of sugars that can be fermented to produce ethanol, a biofuel. While ethanol is primarily used in gasoline blends, it can also be further processed into SAF. * Wastewater treatment sludge: This sludge is rich in organic matter. Through processes like anaerobic digestion, it can produce biogas, which can be further converted into SAF. * Wood mill waste: This includes sawdust, wood chips, and bark. These lignocellulosic materials can be converted into biofuels through various thermochemical or biochemical processes, ultimately leading to SAF production. Therefore, all four materials can be used as feedstock for producing Sustainable Aviation Fuel.

* Statement 1 is correct: Role of Biofilters in Recirculating Aquaculture System (RAS): Biofilters provide waste treatment by removing uneaten fish feed. Biofilters in a RAS help in waste treatment by removing uneaten fish feed and other organic matter from the water. The biofilter media provide a surface for beneficial bacteria to grow, which help in breaking down and removing these wastes. * Statement 2 is correct: Biofilters convert ammonia present in fish waste to nitrate. One of the primary functions of biofilters in a RAS is to convert toxic ammonia (produced from fish waste) into less harmful nitrate. Beneficial bacteria in the biofilter media perform nitrification, a process where ammonia is first converted to nitrite and then further converted to nitrate. * Statement 3 is incorrect: Biofilters do not increase phosphorus as a nutrient for fish in the water. Their primary role is to remove wastes and convert ammonia to nitrate. Phosphorus levels in the water are managed through other means, such as fish feed formulation and water quality management. Therefore, option (B) is the correct answer.

Activated carbon is widely used to clean pollutants because of its unique properties and sustainable production methods. ✅ Statement I: Correct. Activated carbon effectively removes pollutants from industrial effluents due to its high adsorption capacity. It’s commonly used in water treatment and pollution control. ✅Statement II: Correct. This is because activated carbon has an extremely large surface area, created by its porous structure, allowing it to trap heavy metals and other contaminants efficiently. ✅ Statement III: Correct. Moreover, activated carbon can be produced easily and cost-effectively from carbon-rich wastes like coconut shells, rice husks, and other agricultural residues, making it an eco-friendly option. Thus, both Statement II and Statement III are correct, and together they explain why Statement I is true.

* Pyrolysis and plasma gasification are both thermochemical processes used to convert waste materials (organic or inorganic) into usable products. * Pyrolysis: This process involves heating organic materials (like plastic, and biomass) in an oxygen-deficient environment, leading to decomposition into various products like syngas (a mixture of gases), bio-oil, and char. * Plasma gasification: This technology uses high-temperature plasma to break down waste materials into syngas rich in hydrogen and carbon monoxide. * Both processes offer a potential solution for waste management and energy generation. They can convert various waste streams into usable fuels or feedstock for further processing.

Local self-government is a key aspect of democratic decentralization, ensuring governance at the grassroots level. In India, local self-government refers to governing bodies operating below the state level, forming the third tier of governance in the federal structure. The 73rd and 74th Constitutional Amendments provide constitutional status and protection to Panchayati Raj Institutions (rural) and Urban Local Bodies (urban), respectively. Additionally, each state enacts its own legislation to regulate local governance. Democratic decentralization is the foundation of local self-government, emphasizing: - Democracy: Local citizens actively participate in governance through elected representatives, ensuring direct engagement in decision-making. - Decentralization: Authority and responsibilities are transferred from central and state governments to local bodies, empowering communities to address region-specific issues and enhance efficient governance. Thus, local self-government in India strengthens grassroots democracy, fosters self-reliance, and ensures better service delivery to the people.

Drip irrigation is an efficient water delivery system that applies water directly to the roots of plants through a network of tubes, emitters, and valves. It is widely used to conserve water, improve crop yields, and prevent soil degradation. Statement 1 is correct: Drip irrigation delivers water precisely at the plant's root zone, reducing the moisture available on the soil surface. Since weeds typically thrive in moist topsoil, limiting water exposure to non-target areas helps suppress their growth. This makes weed control easier compared to traditional irrigation methods like flooding or sprinklers, which wet the entire field. Statement 2 is incorrect: Soil salinity refers to the accumulation of salts in the soil, which can hinder plant growth. While drip irrigation helps manage water efficiently, it does not directly reduce salinity. However, it can be combined with strategic flushing techniques (applying extra water at intervals) to push salts below the root zone, preventing salt buildup in the upper soil layers. Statement 3 is correct: Drip irrigation releases water slowly and in a controlled manner, reducing surface runoff that can lead to soil erosion. Unlike traditional flood irrigation, which can wash away the topsoil, drip irrigation preserves soil structure and fertility, making it a sustainable choice for agriculture.
Hence, the correct answer is option C.

* The R2 Code of Practices is a tool available for promoting the adoption of environmentally responsible practices in the electronics recycling industry. * R2 stands for Responsible Recycling.
The Code of Practices outlines a set of standards that electronics recyclers should follow to ensure responsible handling of electronic waste.