Highly efficient and sustainable algae harvesting that produced biomass with enhanced characteristics and reusable culture medium were developed from the use of coagulant derived from the waste shell of Gastropod. Thermally treated Gastropod shell samples were screened for the algal cell harvesting efficiency (%) and the underlying mechanism was elucidated from the hydrodynamic equilibrium data and scanning electron microscopic analysis. The floc strength, settling rate parameters, settleability, and filterability were determined and compared with the flocs obtained from the pH induced autocoagulation system. The values of floc settling rate and the sludge volume index (mL/g) showed that the flocs obtained from the Gastropod shell system (rate constant = 1.945 L·mol⁻¹·s⁻¹) settled faster and more compacted than those from the pH induced system (rate constant = 0.2155 (L·mol⁻¹·s⁻¹). Both the growing and harvested flocs from the Gastropod shell system had better strength and breakage factors (>90%) than the pH induced system. The proximate and elemental compositions of the biomass from the Gastropod shell system were comparable with those from centrifugation and pH induced systems. Both the separated culture medium and the harvested algae biomass were successfully reused, in separate systems, to cultivate fresh algae. This indicated the non-toxic effects of the coagulants on both the culture medium and the algae harvested biomass.

通过使用来源于腹足纲动物废壳的凝结剂，开发出了高效且可持续的藻类收获技术，该技术可生产出具有增强特性的生物质，并具有可重复使用的培养基。筛选经过热处理的腹足纲贝壳样品的藻细胞收获效率（％），并从水动力平衡数据和扫描电子显微镜分析中阐明其潜在机理。确定絮凝强度，沉降速率参数，沉降性和可过滤性，并将其与从pH诱导的自凝系统获得的絮凝物进行比较。絮凝沉降速率和污泥体积指数（mL / g）的值表明，从腹足纲壳系统获得的絮凝物（速率常数 = 1.945 L·mol ^-1 ·s ^-1）的沉降比pH诱导系统（速率常数 = 0.2155（L·mol ^-1 ·s ^-1）的沉降更快，更紧密，来自腹足纲壳系统的生长和收获的絮体均具有更好的强度和破损因子（> 90）。腹足纲壳系统的生物质的近端和元素组成与离心和pH诱导系统的生物质的近端和元素组成相当，分离出的培养基和收获的藻类生物质均成功地在不同的系统中重复使用，来培养新鲜的藻类，这表明混凝剂对培养基和藻类收获的生物质均无毒。