第九章：生命保障系统
1. 生态系统模块
生命保障系统将包括一个封闭的生态系统模块，该模块除了安装在载满乘客的飞船上，还可以通过集装箱运输，并在火星上组装。这个生态系统将支持植物生长，提供食物和氧气，并处理废物。第二部分：建立封闭生命保障系统封闭生命保障系统（Closed Life Support System, CLSS）是确保长时间太空任务或在外星环境中人类生存的关键技术。这类系统模拟地球环境，提供所需的空气、水、食物、温湿度控制以及废物处理功能，而不依赖外部资源。多项封闭生命保障系统实验已开展，旨在验证这一系统在极端环境下的可行性和长期稳定性。
1. BIOS-3实验
BIOS-3是苏联在20世纪70年代末至20世纪80年代初进行的一项封闭生命保障系统实验。这项实验在西伯利亚的一个封闭室内进行，实验室有类似地球生态的环境，模拟了一个封闭循环系统。实验持续了多个周期，每个周期的实验时间最长为180天。在实验期间，四名参与者被放置在密闭空间内，他们依赖于系统提供的空气、水和食物，同时系统对废物进行处理。通过这一实验，科学家能够收集到大量数据，验证了生物循环系统的稳定性，了解了人体在封闭环境下的生理反应，并对废物处理和资源循环回收有了更深入的认识。2.生活支持舱实验（Mars500）Mars500是俄罗斯和国际合作的一项模拟火星任务的实验，旨在为未来的火星探索任务提供关键的数据。这项实验在2007年至2011年间进行，参与者生活在一个完全封闭的环境中，模拟火星任务中的孤立和延迟通信环境。实验持续520天，其间，六名志愿者生活在类似火星舱的环境内，依靠系统提供的空气、水和食物。系统不仅测试了空气和水的循环回收，还对废物处理和心理适应能力进行了深入分析。Mars500为了解火星长时间任务中的技术挑战和人类行为提供了宝贵经验。
3. NASA的CHRIS实验
NASA的CHRIS（Closed Loop Life Support System）实验旨在开发适用于火星任务的封闭生命保障系统。这项实验结合了气体交换、水回收、废物处理等技术，模拟了一个完全封闭的环境，以验证不同技术在长时间任务中的效果。CHRIS实验不仅包括对水和空气的循环处理，还涉及食物的栽培系统，探讨如何在太空中生产食物和其他资源，减少对外部供应的依赖。通过该实验，NASA进一步优化了空气净化技术、二氧化碳去除技术以及水资源回收系统。
4. MELISSA项目
MELISSA（Micro-Ecological Life Support System Alternative）项目是欧洲航天局（ESA）开展的一个长期实验，旨在开发完全自主的生物再生生命支持系统。该项目的核心在于通过利用微生物、植物和动物相互作用，形成一个闭合生态系统，以维持人体生命所需的气体、水和食物等资源。MELISSA实验的创新在于它使用微生物和植物的协同作用，不仅可以回收废物，还能从中提取有价值的资源（如食物和氧气），为长期太空任务提供可靠的支持。实验中，系统通过生物处理和人工智能监控来确保资源的高效循环。5.日本的Kibo实验日本在国际空间站（ISS）上也开展了封闭生命保障系统相关实验，最著名的就是Kibo实验模块。Kibo模块是国际空间站的一部分，它配备了多项生命保障技术，旨在为长期空间探索任务提供支持。Kibo实验中的水处理和空气调节系统使用了先进的技术，能够通过电解水生成氧气，通过物理和化学过程回收二氧化碳。此外，实验还研究了如何利用植物栽培系统为宇航员提供新鲜食物，并进行废物回收。这些技术对封闭环境中的资源循环和生命支持系统起到了重要的示范作用。
2. 水和空气循环
生命保障系统内的水和空气循环系统将确保资源的高效利用。水循环系统将包括先进的过滤和净化技术，而空气循环系统将提供新鲜空气，并维持适宜的气候条件。首先，水循环系统的关键技术之一是先进的水回收与净化设备。火星基地内的水资源来源主要依靠水循环，所有的水使用（如饮用水、洗漱水等）都需要通过处理回收。水回收系统采用高效的物理、化学和生物过滤技术，能够去除水中的杂质、微生物和有害物质。一个典型的方案是利用多级过滤器，包括活性炭、反渗透膜、紫外线消毒和化学处理等技术，确保水质达到饮用标准。此外，系统还采用了蒸馏和冷凝技术，在基地内回收所有废水，甚至包括人体排泄物，通过技术手段将这些废水转化为安全的饮用水和清洁水。为了提高水的回收效率，还可以采用具有自净功能的设备，例如在水循环过程中结合植物和微生物处理技术，通过“湿地系统”来进一步净化水。该系统利用植物的根系吸收水中的营养物质和有害物质，微生物则分解有机污染物，形成生态闭环，从而提高水质。空气循环系统则负责提供新鲜的氧气，去除二氧化碳和其他有害气体，维持适宜的氧气浓度和温湿度。空气处理设备通常包括空气净化器、氧气发生器、二氧化碳去除装置等。氧气发生器主要通过电解水的方式，将水分解为氢气和氧气，供应足够的氧气供呼吸使用。二氧化碳去除装置则利用化学吸附技术，通过吸收和转化二氧化碳，保持空气中的氧气含量和二氧化碳浓度在安全范围内。空气循环系统还包括温湿度调节装置，确保环境条件适宜。例如，采用热交换器和冷却系统，调节内部气温，并通过湿度控制系统，保持适宜的湿度水平。这些系统能够模拟地球上的自然气候环境，提高舒适度并减少人体健康风险。实验和研究显示，综合水和空气的循环系统能有效地维持封闭环境中的生命支持，尤其在长时间驻留任务中，能够确保资源的高效利用和节约，减少对外部资源的依赖。随着第二部分：建立技术的不断进步，未来的循环系统将更加高效、智能化，并能适应不同星际环境的挑战，为人类的太空探索和星际移民提供可靠保障。
3. 废物处理与回收
废物处理系统将包括生物降解单元和回收设备，这些设备可以在集装箱中预装，并在基地组装后立即投入使用。首先，废物处理系统的核心是生物降解单元。火星基地的生活环境封闭且资源有限，因此需要通过生物技术处理有机废物。这些废物主要来自食品残渣、植物废料等。生物降解单元采用一系列微生物和酶的降解过程，将有机废物分解为简单的化学成分，如水、二氧化碳和有机肥料。这些微生物处理系统的设计可以根据废物的种类和组成进行定制化，以确保处理效率和安全性。例如，利用厌氧消化技术，通过无氧条件下的微生物分解，产生甲烷气体，可以为基地提供能源。另外，废物回收设备将与生物降解单元紧密配合，确保所有资源都能得到充分利用。废物回收系统主要包括金属、塑料、玻璃和其他可回收物品的分类和处理设备。这些设备将采用先进的自动化技术，如传感器、分拣机器人和机械手臂来分类并处理各种废物。通过分类回收，基地中的可再利用资源（如金属、塑料、玻璃等）可以重新进入生产和生活系统，实现闭环资源循环。金属和塑料将通过熔炼和再加工等技术，重复使用，减少对外部资源的需求。对于非有机废物，如纸张和化学废物，回收设备采用先进的化学处理方法。例如，纸张可以通过化学还原过程将其分解为纤维和其他化学成分，再次利用。化学废物则需要专门的处理设备，将其安全处理后转化为无害物质。所有废物的处理都将经过严格的监测，确保没有有害物质残留。实验数据显示，通过生物降解和高效回收的联合方式，可以实现封闭基地废物的99%以上的处理和回收利用，这样不仅可以减少废物积累，保证生态环境的稳定，还能最大限度地利用有限资源。此外，经过优化的废物处理系统还能够通过提供有机肥料，促进植物的生长，进一步支持基地的可持续发展。
Chapter 9: Life Support Systems
1. Ecosystem Module
The life support system will include a closed ecosystem module, which in addition to being installed on passenger-filled spacecraft, can also be transported via containers and assembled on Mars. This ecosystem will support plant growth, provide food and oxygen, and process waste. Part II: Establishment — Closed Life Support System: A Closed Life Support System (CLSS) is a key technology for ensuring human survival during long-duration space missions or in extraterrestrial environments. Such systems simulate Earth's environment, providing the required air, water, food, temperature and humidity control, and waste processing functions without relying on external resources. Multiple closed life support system experiments have been conducted to verify the feasibility and long-term stability of such systems in extreme environments.
1. BIOS-3 Experiment
BIOS-3 was a closed life support system experiment conducted by the Soviet Union from the late 1970s to the early 1980s. This experiment was conducted in a sealed chamber in Siberia, with a laboratory simulating an Earth-like ecological environment in a closed-loop system. The experiment lasted multiple cycles, with each cycle lasting up to 180 days. During the experiment, four participants were placed in the sealed space, relying on the system for air, water, and food, while the system processed waste. Through this experiment, scientists were able to collect substantial data, verify the stability of the biological cycling system, understand human physiological responses in closed environments, and gain deeper insights into waste processing and resource recycling. 2. Life Support Cabin Experiment (Mars500): Mars500 was a Mars mission simulation experiment conducted by Russia and international partners, aimed at providing key data for future Mars exploration missions. The experiment was conducted between 2007 and 2011, with participants living in a completely closed environment simulating the isolation and delayed communication of a Mars mission. The experiment lasted 520 days, during which six volunteers lived in a Mars-cabin-like environment, relying on the system for air, water, and food. The system tested not only air and water recycling but also conducted in-depth analysis of waste processing and psychological adaptation. Mars500 provided valuable experience for understanding the technical challenges and human behavior during long-duration Mars missions.
3. NASA's CHRIS Experiment
NASA's CHRIS (Closed Loop Life Support System) experiment aimed to develop closed life support systems suitable for Mars missions. This experiment combined gas exchange, water recovery, waste processing, and other technologies, simulating a completely closed environment to verify the effectiveness of different technologies during long-duration missions. The CHRIS experiment included not only water and air recycling but also food cultivation systems, exploring how to produce food and other resources in space to reduce dependence on external supplies. Through this experiment, NASA further optimized air purification technology, carbon dioxide removal technology, and water resource recovery systems.
4. MELISSA Project
The MELISSA (Micro-Ecological Life Support System Alternative) project is a long-term experiment conducted by the European Space Agency (ESA) aimed at developing a fully autonomous bio-regenerative life support system. The core of this project lies in utilizing the interactions among microorganisms, plants, and animals to form a closed ecosystem that maintains the gases, water, and food resources needed for human life. The innovation of the MELISSA experiment lies in its use of the synergistic effects of microorganisms and plants, which can not only recycle waste but also extract valuable resources (such as food and oxygen) from it, providing reliable support for long-duration space missions. In the experiment, the system ensures efficient resource cycling through biological processing and AI monitoring. 5. Japan's Kibo Experiment: Japan has also conducted closed life support system-related experiments on the International Space Station (ISS), the most famous being the Kibo experiment module. The Kibo module is part of the ISS, equipped with multiple life support technologies aimed at supporting long-duration space exploration missions. The water processing and air conditioning systems in the Kibo experiment use advanced technology capable of generating oxygen through water electrolysis and recovering carbon dioxide through physical and chemical processes. Additionally, the experiment studied how to use plant cultivation systems to provide fresh food for astronauts and conduct waste recycling. These technologies have played an important demonstration role for resource cycling and life support systems in closed environments.
2. Water and Air Circulation
The water and air circulation systems within the life support system will ensure efficient resource utilization. The water circulation system will include advanced filtration and purification technologies, while the air circulation system will provide fresh air and maintain suitable climate conditions. First, one of the key technologies in the water circulation system is advanced water recovery and purification equipment. Water resources at the Mars base primarily rely on water circulation, and all water usage (such as drinking water, washing water, etc.) needs to be recovered through processing. The water recovery system uses efficient physical, chemical, and biological filtration technologies to remove impurities, microorganisms, and harmful substances from water. A typical approach uses multi-stage filters, including activated carbon, reverse osmosis membranes, UV disinfection, and chemical treatment technologies to ensure water quality meets drinking standards. Additionally, the system employs distillation and condensation technologies to recover all wastewater at the base, including human waste, converting it through technical means into safe drinking water and clean water. To improve water recovery efficiency, self-cleaning equipment can also be used, such as combining plant and microbial treatment technologies in the water circulation process, further purifying water through a "wetland system." This system utilizes plant roots to absorb nutrients and harmful substances from water, while microorganisms decompose organic pollutants, forming an ecological closed loop that improves water quality. The air circulation system is responsible for providing fresh oxygen, removing carbon dioxide and other harmful gases, and maintaining appropriate oxygen concentration and temperature/humidity. Air processing equipment typically includes air purifiers, oxygen generators, and carbon dioxide removal devices. Oxygen generators primarily produce oxygen by electrolyzing water, decomposing water into hydrogen and oxygen to supply sufficient oxygen for breathing. Carbon dioxide removal devices use chemical adsorption technology to absorb and convert carbon dioxide, maintaining safe levels of oxygen content and carbon dioxide concentration in the air. The air circulation system also includes temperature and humidity regulation devices to ensure suitable environmental conditions. For example, heat exchangers and cooling systems regulate internal temperatures, while humidity control systems maintain appropriate humidity levels. These systems can simulate Earth's natural climate environment, improving comfort and reducing health risks. Experiments and research show that integrated water and air circulation systems can effectively maintain life support in closed environments, especially during long-duration habitation missions, ensuring efficient resource utilization and conservation while reducing dependence on external resources. As Part II: Establishment — technology continues to advance, future circulation systems will become more efficient and intelligent, capable of adapting to the challenges of different interstellar environments, providing reliable support for humanity's space exploration and interstellar immigration.
3. Waste Processing and Recycling
The waste processing system will include biodegradation units and recycling equipment, which can be pre-loaded in containers and put into operation immediately after base assembly. First, the core of the waste processing system is the biodegradation unit. The living environment of the Mars base is closed and resources are limited, so organic waste needs to be processed through biotechnology. This waste primarily comes from food residues, plant waste, etc. The biodegradation unit uses a series of microbial and enzymatic degradation processes to decompose organic waste into simple chemical components such as water, carbon dioxide, and organic fertilizer. These microbial processing systems can be customized according to the type and composition of waste to ensure processing efficiency and safety. For example, anaerobic digestion technology can be used to produce methane gas through microbial decomposition under anaerobic conditions, providing energy for the base. Additionally, waste recycling equipment will work closely with the biodegradation unit to ensure all resources are fully utilized. The waste recycling system mainly includes classification and processing equipment for metals, plastics, glass, and other recyclable items. This equipment will use advanced automation technologies such as sensors, sorting robots, and robotic arms to classify and process various types of waste. Through classification and recycling, reusable resources at the base (such as metals, plastics, glass, etc.) can re-enter the production and living systems, achieving closed-loop resource cycling. Metals and plastics will be reused through smelting and reprocessing technologies, reducing the need for external resources. For non-organic waste such as paper and chemical waste, recycling equipment uses advanced chemical processing methods. For example, paper can be decomposed into fibers and other chemical components through chemical reduction processes for reuse. Chemical waste requires specialized processing equipment to safely convert it into harmless substances. All waste processing will be subject to strict monitoring to ensure no harmful substance residues remain. Experimental data shows that through the combination of biodegradation and efficient recycling, over 99% of waste in a closed base can be processed and recycled, which not only reduces waste accumulation and maintains ecological stability but also maximizes the use of limited resources. Additionally, optimized waste processing systems can promote plant growth by providing organic fertilizer, further supporting the sustainable development of the base.